Reach milestone 1.19.0

Add Java annotation to code blocks in README files #728

.travis.yml

@@ -17,7 +17,7 @@ install:
 - mvn install -DskipTests=true -Dmaven.javadoc.skip=true -B -V -e
 
 after_success:
-- mvn clean org.jacoco:jacoco-maven-plugin:prepare-agent package sonar:sonar -Dsonar.host.url=https://sonarqube.com -Dsonar.login=$SONAR_TOKEN
+- mvn clean org.jacoco:jacoco-maven-plugin:prepare-agent package sonar:sonar -Dsonar.host.url=https://sonarcloud.io -Dsonar.login=$SONAR_TOKEN
 - bash update-ghpages.sh
 
 # use latest java version available instead of travis default
@@ -36,4 +36,4 @@ notifications:
     on_failure: always  # options: [always|never|change] default: always
     on_start: never     # options: [always|never|change] default: always
 
-sudo: required
+sudo: required

PULL_REQUEST_TEMPLATE.md

@@ -0,0 +1,15 @@
+
+Pull request title
+
+- Clearly and concisely describes what it does
+- Refer to the issue that it solves, if available
+
+
+Pull request description
+
+- Describes the main changes that come with the pull request
+- Any relevant additional information is provided
+
+
+
+> For detailed contributing instructions see https://github.com/iluwatar/java-design-patterns/wiki/01.-How-to-contribute

README.md

@@ -7,7 +7,8 @@
 [![Build status](https://travis-ci.org/iluwatar/java-design-patterns.svg?branch=master)](https://travis-ci.org/iluwatar/java-design-patterns)
 [![License MIT](https://img.shields.io/badge/license-MIT-blue.svg)](https://raw.githubusercontent.com/iluwatar/java-design-patterns/master/LICENSE.md)
 [![Join the chat at https://gitter.im/iluwatar/java-design-patterns](https://badges.gitter.im/Join%20Chat.svg)](https://gitter.im/iluwatar/java-design-patterns?utm_source=badge&utm_medium=badge&utm_campaign=pr-badge&utm_content=badge)
-[![Quality Gate](https://sonarqube.com/api/badges/gate?key=com.iluwatar%3Ajava-design-patterns)](https://sonarqube.com/dashboard/index/com.iluwatar%3Ajava-design-patterns)
+[![Quality Gate](https://sonarcloud.io/api/project_badges/measure?project=com.iluwatar%3Ajava-design-patterns&metric=alert_status)](https://sonarcloud.io/dashboard/index/com.iluwatar%3Ajava-design-patterns)
+[![CII Best Practices](https://bestpractices.coreinfrastructure.org/projects/1503/badge)](https://bestpractices.coreinfrastructure.org/projects/1503)
 
 # Introduction
 

_scripts/postPumlsToServer.py

@@ -1,67 +0,0 @@
-#
-# The MIT License
-# Copyright (c) 2014-2016 Ilkka Seppälä
-#
-# Permission is hereby granted, free of charge, to any person obtaining a copy
-# of this software and associated documentation files (the "Software"), to deal
-# in the Software without restriction, including without limitation the rights
-# to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
-# copies of the Software, and to permit persons to whom the Software is
-# furnished to do so, subject to the following conditions:
-#
-# The above copyright notice and this permission notice shall be included in
-# all copies or substantial portions of the Software.
-#
-# THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
-# IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
-# FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
-# AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
-# LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
-# OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
-# THE SOFTWARE.
-#
-
-import requests, glob, re, os
-
-# taken from here: http://stackoverflow.com/a/13641746
-def replace(file, pattern, subst):
-    # Read contents from file as a single string
-    file_handle = open(file, 'r')
-    file_string = file_handle.read()
-    file_handle.close()
-
-    # Use RE package to allow for replacement (also allowing for (multiline) REGEX)
-    file_string = (re.sub(pattern, subst, file_string))
-
-    # Write contents to file.
-    # Using mode 'w' truncates the file.
-    file_handle = open(file, 'w')
-    file_handle.write(file_string)
-    file_handle.close()
-
-# list of all puml files
-fileList = glob.glob('*/etc/*.puml')
-for puml in fileList:
-    pathSplit = puml.split("/")
-    # parent folder
-    parent = pathSplit[0]
-    # individual artifact/project name
-    artifact = pathSplit[2].replace(".urm.puml", "")
-    print "parent: " + parent + "; artifact: " + artifact
-
-    # do a POST to the official plantuml hosting site with a little trick "!includeurl" and raw github content
-    data = {
-        'text': "!includeurl https://raw.githubusercontent.com/iluwatar/java-design-patterns/master/" + puml
-    }
-    r = requests.post('http://plantuml.com/plantuml/uml', data=data)
-    pumlId = r.url.replace("http://plantuml.com/plantuml/uml/", "")
-    
-    # the only thing needed to get a png/svg/ascii from the server back
-    print "Puml Server ID: " + pumlId
-    
-    # add the id so jekyll/liquid can use it
-    if (parent == artifact):
-        replace("./" + parent + "/README.md", "categories:", "pumlid: {}\\ncategories:".format(pumlId))
-    else:
-        print "I dont want to program this, just add the following lines to the README.md file that corresponds to this puml file '" + puml + "'\npumlid: {}".format(pumlId)
-

abstract-document/README.md

@@ -3,7 +3,6 @@ layout: pattern
 title: Abstract Document
 folder: abstract-document
 permalink: /patterns/abstract-document/
-pumlid: PSjB3eCm34NHhPG599vtDyQn85L-ifzX-p3lxEf8Twj3MXGDQvyJMFubChxpKN767gucSq07iinEjSNDOACVNvoAUZr6MWoe3QVE_WRnxZ0Mf38b-hkIGlurX_MyehS7
 categories: Structural
 tags: 
  - Java
@@ -13,8 +12,6 @@ tags:
 ## Intent
 Achieve flexibility of untyped languages and keep the type-safety 
 
-![alt text](./etc/abstract-document-base.png "Abstract Document Base")
-
 ![alt text](./etc/abstract-document.png "Abstract Document Traits and Domain")
 
 

abstract-document/etc/abstract-document-base.ucls

@@ -1,58 +0,0 @@
-<?xml version="1.0" encoding="UTF-8"?>
-<class-diagram version="1.1.9" icons="true" automaticImage="PNG" always-add-relationships="false" generalizations="true" 
-  realizations="true" associations="true" dependencies="false" nesting-relationships="true" router="FAN">  
-  <interface id="1" language="java" name="com.iluwatar.abstractdocument.Document" project="design-patterns" 
-    file="/design-patterns/src/com/iluwatar/abstractdocument/Document.java" binary="false" corner="BOTTOM_RIGHT">    
-    <position height="-1" width="-1" x="249" y="405"/>    
-    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
-      sort-features="false" accessors="true" visibility="true">      
-      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
-      <operations public="true" package="true" protected="true" private="true" static="true"/>    
-    </display>  
-  </interface>  
-  <class id="2" language="java" name="com.iluwatar.abstractdocument.AbstractDocument" project="design-patterns" 
-    file="/design-patterns/src/com/iluwatar/abstractdocument/AbstractDocument.java" binary="false" corner="BOTTOM_RIGHT">    
-    <position height="-1" width="-1" x="250" y="237"/>    
-    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
-      sort-features="false" accessors="true" visibility="true">      
-      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
-      <operations public="true" package="true" protected="true" private="true" static="true"/>    
-    </display>  
-  </class>  
-  <class id="3" language="java" name="com.iluwatar.abstractdocument.domain.Car" project="design-patterns" 
-    file="/design-patterns/src/com/iluwatar/abstractdocument/domain/Car.java" binary="false" corner="BOTTOM_RIGHT">    
-    <position height="-1" width="-1" x="108" y="75"/>    
-    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
-      sort-features="false" accessors="true" visibility="true">      
-      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
-      <operations public="true" package="true" protected="true" private="true" static="true"/>    
-    </display>  
-  </class>  
-  <class id="4" language="java" name="com.iluwatar.abstractdocument.domain.Part" project="design-patterns" 
-    file="/design-patterns/src/com/iluwatar/abstractdocument/domain/Part.java" binary="false" corner="BOTTOM_RIGHT">    
-    <position height="-1" width="-1" x="400" y="76"/>    
-    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
-      sort-features="false" accessors="true" visibility="true">      
-      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
-      <operations public="true" package="true" protected="true" private="true" static="true"/>    
-    </display>  
-  </class>  
-  <generalization id="5">    
-    <end type="SOURCE" refId="4"/>    
-    <end type="TARGET" refId="2"/>  
-  </generalization>  
-  <realization id="6">    
-    <end type="SOURCE" refId="2"/>    
-    <end type="TARGET" refId="1"/>  
-  </realization>  
-  <generalization id="7">    
-    <end type="SOURCE" refId="3"/>    
-    <end type="TARGET" refId="2"/>  
-  </generalization>  
-  <classifier-display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
-    sort-features="false" accessors="true" visibility="true">    
-    <attributes public="true" package="true" protected="true" private="true" static="true"/>    
-    <operations public="true" package="true" protected="true" private="true" static="true"/>  
-  </classifier-display>  
-  <association-display labels="true" multiplicity="true"/>
-</class-diagram>

abstract-document/etc/abstract-document.ucls

@@ -1,91 +1,137 @@
 <?xml version="1.0" encoding="UTF-8"?>
-<class-diagram version="1.1.9" icons="true" automaticImage="PNG" always-add-relationships="false" generalizations="true" 
-  realizations="true" associations="true" dependencies="false" nesting-relationships="true" router="FAN">  
-  <interface id="1" language="java" name="com.iluwatar.abstractdocument.Document" project="design-patterns" 
-    file="/design-patterns/src/com/iluwatar/abstractdocument/Document.java" binary="false" corner="BOTTOM_RIGHT">    
-    <position height="-1" width="-1" x="341" y="376"/>    
-    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
-      sort-features="false" accessors="true" visibility="true">      
-      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
-      <operations public="true" package="true" protected="true" private="true" static="true"/>    
-    </display>  
-  </interface>  
-  <interface id="2" language="java" name="com.iluwatar.abstractdocument.domain.HasModel" project="design-patterns" 
-    file="/design-patterns/src/com/iluwatar/abstractdocument/domain/HasModel.java" binary="false" corner="BOTTOM_RIGHT">    
-    <position height="81" width="173" x="41" y="194"/>    
-    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
-      sort-features="false" accessors="true" visibility="true">      
-      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
-      <operations public="true" package="true" protected="true" private="true" static="true"/>    
-    </display>  
-  </interface>  
-  <interface id="3" language="java" name="com.iluwatar.abstractdocument.domain.HasPrice" project="design-patterns" 
-    file="/design-patterns/src/com/iluwatar/abstractdocument/domain/HasPrice.java" binary="false" corner="BOTTOM_RIGHT">    
-    <position height="81" width="175" x="254" y="194"/>    
-    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
-      sort-features="false" accessors="true" visibility="true">      
-      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
-      <operations public="true" package="true" protected="true" private="true" static="true"/>    
-    </display>  
-  </interface>  
-  <interface id="4" language="java" name="com.iluwatar.abstractdocument.domain.HasParts" project="design-patterns" 
-    file="/design-patterns/src/com/iluwatar/abstractdocument/domain/HasParts.java" binary="false" corner="BOTTOM_RIGHT">    
-    <position height="81" width="173" x="469" y="194"/>    
-    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
-      sort-features="false" accessors="true" visibility="true">      
-      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
-      <operations public="true" package="true" protected="true" private="true" static="true"/>    
-    </display>  
-  </interface>  
-  <class id="5" language="java" name="com.iluwatar.abstractdocument.domain.Car" project="design-patterns" 
-    file="/design-patterns/src/com/iluwatar/abstractdocument/domain/Car.java" binary="false" corner="BOTTOM_RIGHT">    
-    <position height="99" width="173" x="254" y="37"/>    
+<class-diagram version="1.2.2" icons="true" always-add-relationships="false" generalizations="true" realizations="true" 
+  associations="true" dependencies="false" nesting-relationships="true" router="FAN">  
+  <class id="1" language="java" name="com.iluwatar.abstractdocument.AbstractDocument" project="abstract-document" 
+    file="/abstract-document/src/main/java/com/iluwatar/abstractdocument/AbstractDocument.java" binary="false" 
+    corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="659" y="286"/>    
     <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
       sort-features="false" accessors="true" visibility="true">      
       <attributes public="true" package="true" protected="true" private="true" static="true"/>      
       <operations public="true" package="true" protected="true" private="true" static="true"/>    
     </display>  
   </class>  
-  <class id="6" language="java" name="com.iluwatar.abstractdocument.domain.Part" project="design-patterns" 
-    file="/design-patterns/src/com/iluwatar/abstractdocument/domain/Part.java" binary="false" corner="BOTTOM_RIGHT">    
-    <position height="99" width="173" x="41" y="37"/>    
+  <interface id="2" language="java" name="com.iluwatar.abstractdocument.Document" project="abstract-document" 
+    file="/abstract-document/src/main/java/com/iluwatar/abstractdocument/Document.java" binary="false" 
+    corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="562" y="27"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+      sort-features="false" accessors="true" visibility="true">      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
+      <operations public="true" package="true" protected="true" private="true" static="true"/>    
+    </display>  
+  </interface>  
+  <class id="3" language="java" name="com.iluwatar.abstractdocument.domain.Car" project="abstract-document" 
+    file="/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/Car.java" binary="false" 
+    corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="348" y="737"/>    
     <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
       sort-features="false" accessors="true" visibility="true">      
       <attributes public="true" package="true" protected="true" private="true" static="true"/>      
       <operations public="true" package="true" protected="true" private="true" static="true"/>    
     </display>  
   </class>  
-  <realization id="7">    
-    <end type="SOURCE" refId="5"/>    
-    <end type="TARGET" refId="2"/>  
+  <class id="4" language="java" name="com.iluwatar.abstractdocument.domain.Part" project="abstract-document" 
+    file="/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/Part.java" binary="false" 
+    corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="760" y="746"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+      sort-features="false" accessors="true" visibility="true">      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
+      <operations public="true" package="true" protected="true" private="true" static="true"/>    
+    </display>  
+  </class>  
+  <interface id="5" language="java" name="com.iluwatar.abstractdocument.domain.HasModel" project="abstract-document" 
+    file="/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/HasModel.java" binary="false" 
+    corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="355" y="297"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+      sort-features="false" accessors="true" visibility="true">      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
+      <operations public="true" package="true" protected="true" private="true" static="true"/>    
+    </display>  
+  </interface>  
+  <interface id="6" language="java" name="com.iluwatar.abstractdocument.domain.HasParts" project="abstract-document" 
+    file="/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/HasParts.java" binary="false" 
+    corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="109" y="297"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+      sort-features="false" accessors="true" visibility="true">      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
+      <operations public="true" package="true" protected="true" private="true" static="true"/>    
+    </display>  
+  </interface>  
+  <interface id="7" language="java" name="com.iluwatar.abstractdocument.domain.HasPrice" project="abstract-document" 
+    file="/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/HasPrice.java" binary="false" 
+    corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="1008" y="283"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+      sort-features="false" accessors="true" visibility="true">      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
+      <operations public="true" package="true" protected="true" private="true" static="true"/>    
+    </display>  
+  </interface>  
+  <interface id="8" language="java" name="com.iluwatar.abstractdocument.domain.HasType" project="abstract-document" 
+    file="/abstract-document/src/main/java/com/iluwatar/abstractdocument/domain/HasType.java" binary="false" 
+    corner="BOTTOM_RIGHT">    
+    <position height="-1" width="-1" x="1257" y="277"/>    
+    <display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
+      sort-features="false" accessors="true" visibility="true">      
+      <attributes public="true" package="true" protected="true" private="true" static="true"/>      
+      <operations public="true" package="true" protected="true" private="true" static="true"/>    
+    </display>  
+  </interface>  
+  <realization id="9">    
+    <end type="SOURCE" refId="4"/>    
+    <end type="TARGET" refId="8"/>  
   </realization>  
-  <realization id="8">    
+  <realization id="10">    
+    <end type="SOURCE" refId="3"/>    
+    <end type="TARGET" refId="7"/>  
+  </realization>  
+  <generalization id="11">    
     <end type="SOURCE" refId="6"/>    
     <end type="TARGET" refId="2"/>  
-  </realization>  
-  <generalization id="9">    
-    <end type="SOURCE" refId="2"/>    
-    <end type="TARGET" refId="1"/>  
   </generalization>  
-  <realization id="10">    
-    <end type="SOURCE" refId="5"/>    
-    <end type="TARGET" refId="3"/>  
+  <realization id="12">    
+    <end type="SOURCE" refId="4"/>    
+    <end type="TARGET" refId="5"/>  
   </realization>  
-  <realization id="11">    
-    <end type="SOURCE" refId="5"/>    
-    <end type="TARGET" refId="4"/>  
+  <realization id="13">    
+    <end type="SOURCE" refId="4"/>    
+    <end type="TARGET" refId="7"/>  
   </realization>  
-  <generalization id="12">    
+  <generalization id="14">    
     <end type="SOURCE" refId="3"/>    
     <end type="TARGET" refId="1"/>  
   </generalization>  
-  <generalization id="13">    
+  <realization id="15">    
+    <end type="SOURCE" refId="3"/>    
+    <end type="TARGET" refId="6"/>  
+  </realization>  
+  <generalization id="16">    
+    <end type="SOURCE" refId="8"/>    
+    <end type="TARGET" refId="2"/>  
+  </generalization>  
+  <generalization id="17">    
+    <end type="SOURCE" refId="7"/>    
+    <end type="TARGET" refId="2"/>  
+  </generalization>  
+  <realization id="18">    
+    <end type="SOURCE" refId="3"/>    
+    <end type="TARGET" refId="5"/>  
+  </realization>  
+  <generalization id="19">    
     <end type="SOURCE" refId="4"/>    
     <end type="TARGET" refId="1"/>  
   </generalization>  
-  <realization id="14">    
-    <end type="SOURCE" refId="6"/>    
-    <end type="TARGET" refId="3"/>  
+  <generalization id="20">    
+    <end type="SOURCE" refId="5"/>    
+    <end type="TARGET" refId="2"/>  
+  </generalization>  
+  <realization id="21">    
+    <end type="SOURCE" refId="1"/>    
+    <end type="TARGET" refId="2"/>  
   </realization>  
   <classifier-display autosize="true" stereotype="true" package="true" initial-value="false" signature="true" 
     sort-features="false" accessors="true" visibility="true">    

abstract-document/etc/abstract-document.urm.puml

@@ -1,59 +0,0 @@
-@startuml
-package com.iluwatar.abstractdocument.domain {
-  class Car {
-    + Car(properties : Map<String, Object>)
-  }
-  interface HasModel {
-    + PROPERTY : String {static}
-    + getModel() : Optional<String>
-  }
-  interface HasParts {
-    + PROPERTY : String {static}
-    + getParts() : Stream<Part>
-  }
-  interface HasPrice {
-    + PROPERTY : String {static}
-    + getPrice() : Optional<Number>
-  }
-  interface HasType {
-    + PROPERTY : String {static}
-    + getType() : Optional<String>
-  }
-  class Part {
-    + Part(properties : Map<String, Object>)
-  }
-}
-package com.iluwatar.abstractdocument {
-  abstract class AbstractDocument {
-    - properties : Map<String, Object>
-    # AbstractDocument(properties : Map<String, Object>)
-    + children(key : String, constructor : Function<Map<String, Object>, T>) : Stream<T>
-    + get(key : String) : Object
-    + put(key : String, value : Object)
-    + toString() : String
-  }
-  class App {
-    - LOGGER : Logger {static}
-    + App()
-    + main(args : String[]) {static}
-  }
-  interface Document {
-    + children(String, Function<Map<String, Object>, T>) : Stream<T> {abstract}
-    + get(String) : Object {abstract}
-    + put(String, Object) {abstract}
-  }
-}
-AbstractDocument ..|> Document 
-Car ..|> HasModel 
-Car ..|> HasPrice 
-Car ..|> HasParts 
-Car --|> AbstractDocument 
-HasModel --|> Document 
-HasParts --|> Document 
-HasPrice --|> Document 
-HasType --|> Document 
-Part ..|> HasType 
-Part ..|> HasModel 
-Part ..|> HasPrice 
-Part --|> AbstractDocument 
-@enduml

abstract-document/pom.xml

@@ -29,13 +29,18 @@
     <parent>
         <artifactId>java-design-patterns</artifactId>
         <groupId>com.iluwatar</groupId>
-        <version>1.17.0</version>
+        <version>1.19.0</version>
     </parent>
     <artifactId>abstract-document</artifactId>
     <dependencies>
         <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
             <scope>test</scope>
         </dependency>
     </dependencies>

abstract-document/src/test/java/com/iluwatar/abstractdocument/AbstractDocumentTest.java

@@ -22,7 +22,7 @@
  */
 package com.iluwatar.abstractdocument;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 import java.util.Arrays;
 import java.util.HashMap;
@@ -30,8 +30,8 @@ import java.util.List;
 import java.util.Map;
 import java.util.stream.Stream;
 
-import static junit.framework.TestCase.assertEquals;
-import static junit.framework.TestCase.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
 
 /**
  * AbstractDocument test class

abstract-document/src/test/java/com/iluwatar/abstractdocument/AppTest.java

@@ -22,7 +22,7 @@
  */
 package com.iluwatar.abstractdocument;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 /**
  * Simple App test

abstract-document/src/test/java/com/iluwatar/abstractdocument/DomainTest.java

@@ -28,13 +28,13 @@ import com.iluwatar.abstractdocument.domain.HasParts;
 import com.iluwatar.abstractdocument.domain.HasPrice;
 import com.iluwatar.abstractdocument.domain.HasType;
 import com.iluwatar.abstractdocument.domain.Part;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 import java.util.Arrays;
 import java.util.HashMap;
 import java.util.Map;
 
-import static junit.framework.TestCase.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
 /**
  * Test for Part and Car

abstract-factory/README.md

@@ -3,7 +3,6 @@ layout: pattern
 title: Abstract Factory
 folder: abstract-factory
 permalink: /patterns/abstract-factory/
-pumlid: PSZB3OD034NHLa81Czwd6sCC39gVxEUWT1_ssLmTtQLqgR5fM7sTmFGtaV6TZu8prd0r6HtQaMKqAZLk1XjT_E6qgPUZfyc0MdTgx0-8LuUn8ErFXdr98NypXxKyezKV
 categories: Creational
 tags:
  - Java
@@ -35,7 +34,7 @@ Wikipedia says
 
 Translating the kingdom example above. First of all we have some interfaces and implementation for the objects in the kingdom
 
-```
+```java
 public interface Castle {
   String getDescription();
 }
@@ -75,7 +74,7 @@ public class ElfArmy implements Army {
 
 Then we have the abstraction and implementations for the kingdom factory
 
-```
+```java
 public interface KingdomFactory {
   Castle createCastle();
   King createKing();
@@ -109,7 +108,7 @@ public class OrcKingdomFactory implements KingdomFactory {
 
 Now we have our abstract factory that lets us make family of related objects i.e. Elven kingdom factory creates Elven castle, king and army etc.
 
-```
+```java
 KingdomFactory factory = new ElfKingdomFactory();
 Castle castle = factory.createCastle();
 King king = factory.createKing();
@@ -120,6 +119,45 @@ king.getDescription(); // Output: This is the Elven king!
 army.getDescription(); // Output: This is the Elven Army!
 ```
 
+Now, we can design a factory for our different kingdom factories. In this example, we created FactoryMaker, responsible for returning an instance of either ElfKingdomFactory or OrcKingdomFactory.  
+The client can use FactoryMaker to create the desired concrete factory which, in turn, will produce different concrete objects (Army, King, Castle).  
+In this example, we also used an enum to parameterize which type of kingdom factory the client will ask for.
+
+```java
+public static class FactoryMaker {
+
+  public enum KingdomType {
+    ELF, ORC
+  }
+
+  public static KingdomFactory makeFactory(KingdomType type) {
+    switch (type) {
+      case ELF:
+        return new ElfKingdomFactory();
+      case ORC:
+        return new OrcKingdomFactory();
+      default:
+        throw new IllegalArgumentException("KingdomType not supported.");
+    }
+  }
+}
+
+public static void main(String[] args) {
+  App app = new App();
+
+  LOGGER.info("Elf Kingdom");
+  app.createKingdom(FactoryMaker.makeFactory(KingdomType.ELF));
+  LOGGER.info(app.getArmy().getDescription());
+  LOGGER.info(app.getCastle().getDescription());
+  LOGGER.info(app.getKing().getDescription());
+
+  LOGGER.info("Orc Kingdom");
+  app.createKingdom(FactoryMaker.makeFactory(KingdomType.ORC));
+  -- similar use of the orc factory
+}
+```
+
+
 ## Applicability
 Use the Abstract Factory pattern when
 
@@ -141,6 +179,15 @@ Use the Abstract Factory pattern when
 
 *	Dependency injection in java hides the service class dependencies that can lead to runtime errors that would have been caught at compile time.
 
+
+## Tutorial
+* [Abstract Factory Pattern Tutorial](https://www.journaldev.com/1418/abstract-factory-design-pattern-in-java) 
+
+## Presentations
+
+* [Abstract Factory Pattern](etc/presentation.html) 
+
+
 ## Real world examples
 
 * [javax.xml.parsers.DocumentBuilderFactory](http://docs.oracle.com/javase/8/docs/api/javax/xml/parsers/DocumentBuilderFactory.html)

abstract-factory/etc/presentation.html

@@ -0,0 +1,190 @@
+<!--
+
+    The MIT License
+    Copyright (c) 2017 Rodolfo Forte
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+    THE SOFTWARE.
+
+-->
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>Design Patterns - Abstract Factory Presentation</title>
+    <meta charset="utf-8">
+    <style>
+      @import url(https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz);
+      @import url(https://fonts.googleapis.com/css?family=Droid+Serif:400,700,400italic);
+      @import url(https://fonts.googleapis.com/css?family=Ubuntu+Mono:400,700,400italic);
+
+      body { font-family: 'Droid Serif'; }
+      h1, h2, h3 {
+        font-family: 'Yanone Kaffeesatz';
+        font-weight: normal;
+      }
+      .remark-code, .remark-inline-code { font-family: 'Ubuntu Mono'; }
+	  
+	  blockquote {
+		border-left: 0.3em solid rgba(0,0,0,0.5);
+		padding: 0 15px;
+		font-style: italic;
+	  }
+	  
+	  img {
+		max-width:100%;
+	  }
+    </style>
+  </head>
+  <body>
+    <textarea id="source">
+
+class: center, middle
+
+# Abstract Factory
+
+---
+
+# Also known as
+
+* Kit
+
+---
+
+# Intent
+
+* Provide an interface for creating families of related or dependent objects without specifying their concrete classes
+
+---
+
+# Explanation
+
+* [Wikipedia](https://en.wikipedia.org/wiki/Abstract_factory_pattern) says:
+  > "The abstract factory pattern provides a way to encapsulate a group of individual factories that have a common theme without specifying their concrete classes"
+
+<br />
+
+* In plain words:
+  * A factory that groups individual but related/dependent factories together without specifying their concrete classes;
+  * A factory of factories; 
+
+---
+
+# Example
+
+* In a factory that creates kingdoms, we need objects with common theme:
+
+  * Elven kingdom needs an Elven king, Elven castle and Elven army;
+  
+  * Orcish kingdom needs an Orcish king, Orcish castle and Orcish army;
+
+<br />
+  
+* There is a dependency between the objects in the kingdom;
+
+---
+
+# Diagram
+
+* Based on the kingdom example, the diagram below showcases the different concrete factories and their concrete products:
+
+.center[![Diagram](diagram1.png)]
+
+
+---
+
+# Diagram
+
+* The class diagram below showcases the factory of factories;
+
+* At runtime, we can define which Kingdom type is needed and pass it as a parameter to define which concrete KingdomFactory to instantiate;
+
+* The concrete factory returned will then be able to produce the related objects of the specified type;
+  
+.center[![Diagram](diagram2.png)]
+
+---
+
+# Applicability
+
+Use the Abstract Factory pattern when:
+
+* A system should be independent of how its products are created, composed and represented;
+
+* A system should be configured with one of multiple families of products;
+
+* A family of related product objects is designed to be used together, and you need to enforce this constraint;
+
+* You want to provide a class library of products, and you want to reveal just their interfaces, not their implementations;
+
+---
+
+# Applicability
+
+Use the Abstract Factory pattern when:
+
+* The lifetime of the dependency is conceptually shorter than the lifetime of the consumer;
+
+* You need a run-time value to construct a particular dependency;
+
+* You want to decide which product to call from a family at runtime;
+
+* You need to supply one or more parameters only known at run-time before you can resolve a dependency;
+
+---
+
+#Use Cases
+
+* Selecting to call the appropriate implementation of FileSystemAcmeService or DatabaseAcmeService or NetworkAcmeService at runtime;
+* Unit test case writing becomes much easier;
+
+---
+
+# Consequences
+
+* Dependency injection in java hides the service class dependencies that can lead to runtime errors that would have been caught at compile time
+
+---
+
+# Real world examples
+
+[javax.xml.parsers.DocumentBuilderFactory](http://docs.oracle.com/javase/8/docs/api/javax/xml/parsers/DocumentBuilderFactory.html)
+
+[javax.xml.transform.TransformerFactory](http://docs.oracle.com/javase/8/docs/api/javax/xml/transform/TransformerFactory.html#newInstance--)
+
+[javax.xml.xpath.XPathFactory](http://docs.oracle.com/javase/8/docs/api/javax/xml/xpath/XPathFactory.html#newInstance--)
+
+---
+
+# Credits
+
+* [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612)
+
+---
+
+# Tutorials
+
+* Source code http://java-design-patterns.com/patterns/abstract-factory/
+
+    </textarea>
+    <script src="https://gnab.github.io/remark/downloads/remark-latest.min.js">
+    </script>
+    <script>
+      var slideshow = remark.create();
+    </script>
+  </body>
+</html>

abstract-factory/pom.xml

@@ -29,13 +29,18 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.17.0</version>
+    <version>1.19.0</version>
   </parent>
   <artifactId>abstract-factory</artifactId>
   <dependencies>
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
       <scope>test</scope>
     </dependency>
   </dependencies>

abstract-factory/src/main/java/com/iluwatar/abstractfactory/App.java

@@ -25,6 +25,8 @@ package com.iluwatar.abstractfactory;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import com.iluwatar.abstractfactory.App.FactoryMaker.KingdomType;
+
 /**
  * 
  * The Abstract Factory pattern provides a way to encapsulate a group of individual factories that have a common theme
@@ -56,7 +58,7 @@ public class App {
     setCastle(factory.createCastle());
     setArmy(factory.createArmy());
   }
-
+  
   King getKing(final KingdomFactory factory) {
     return factory.createKing();
   }
@@ -92,9 +94,36 @@ public class App {
   private void setArmy(final Army army) {
     this.army = army;
   }
-  
+
   /**
-   * Program entry point
+   * The factory of kingdom factories.
+   */
+  public static class FactoryMaker {
+
+    /**
+     * Enumeration for the different types of Kingdoms.
+     */
+    public enum KingdomType {
+      ELF, ORC
+    }
+
+    /**
+     * The factory method to create KingdomFactory concrete objects.
+     */
+    public static KingdomFactory makeFactory(KingdomType type) {
+      switch (type) {
+        case ELF:
+          return new ElfKingdomFactory();
+        case ORC:
+          return new OrcKingdomFactory();
+        default:
+          throw new IllegalArgumentException("KingdomType not supported.");
+      }
+    }
+  }
+
+  /**
+   * Program entry point.
    * 
    * @param args
    *          command line args
@@ -104,17 +133,15 @@ public class App {
     App app = new App();
 
     LOGGER.info("Elf Kingdom");
-    app.createKingdom(new ElfKingdomFactory());
+    app.createKingdom(FactoryMaker.makeFactory(KingdomType.ELF));
     LOGGER.info(app.getArmy().getDescription());
     LOGGER.info(app.getCastle().getDescription());
     LOGGER.info(app.getKing().getDescription());
 
     LOGGER.info("Orc Kingdom");
-    app.createKingdom(new OrcKingdomFactory());
+    app.createKingdom(FactoryMaker.makeFactory(KingdomType.ORC));
     LOGGER.info(app.getArmy().getDescription());
     LOGGER.info(app.getCastle().getDescription());
     LOGGER.info(app.getKing().getDescription());
-
   }
-
-}
+}

abstract-factory/src/test/java/com/iluwatar/abstractfactory/AbstractFactoryTest.java

@@ -22,11 +22,14 @@
  */
 package com.iluwatar.abstractfactory;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
-import org.junit.Before;
-import org.junit.Test;
+import com.iluwatar.abstractfactory.App.FactoryMaker;
+import com.iluwatar.abstractfactory.App.FactoryMaker.KingdomType;
+
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
 
 /**
  * Test for abstract factory
@@ -37,10 +40,10 @@ public class AbstractFactoryTest {
   private KingdomFactory elfFactory;
   private KingdomFactory orcFactory;
 
-  @Before
+  @BeforeEach
   public void setUp() {
-    elfFactory = new ElfKingdomFactory();
-    orcFactory = new OrcKingdomFactory();
+    elfFactory = FactoryMaker.makeFactory(KingdomType.ELF);
+    orcFactory = FactoryMaker.makeFactory(KingdomType.ORC);
   }
 
   @Test

abstract-factory/src/test/java/com/iluwatar/abstractfactory/AppTest.java

@@ -22,7 +22,7 @@
  */
 package com.iluwatar.abstractfactory;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 import java.io.IOException;
 

adapter/README.md

@@ -3,7 +3,6 @@ layout: pattern
 title: Adapter
 folder: adapter
 permalink: /patterns/adapter/
-pumlid: DSR14S8m30J0Lg20M7-wEMnDOiPMFDA9j0yyUEtUkzMHJTF7xI1NF4GSLzaxZtncgDVJgCPIpobzv0N2vOKtjgRHTziMI7KBcOXl10thfxB-Nz9dMJd71m00
 categories: Structural
 tags:
  - Java
@@ -41,7 +40,7 @@ Consider a captain that can only use rowing boats and cannot sail at all.
 
 First we have interfaces `RowingBoat` and `FishingBoat`
 
-```
+```java
 public interface RowingBoat {
   void row();
 }
@@ -56,7 +55,7 @@ public class FishingBoat {
 
 And captain expects an implementation of `RowingBoat` interface to be able to move
 
-```
+```java
 public class Captain implements RowingBoat {
 
   private RowingBoat rowingBoat;
@@ -74,7 +73,7 @@ public class Captain implements RowingBoat {
 
 Now let's say the pirates are coming and our captain needs to escape but there is only fishing boat available. We need to create an adapter that allows the captain to operate the fishing boat with his rowing boat skills.
 
-```
+```java
 public class FishingBoatAdapter implements RowingBoat {
 
   private static final Logger LOGGER = LoggerFactory.getLogger(FishingBoatAdapter.class);
@@ -94,7 +93,7 @@ public class FishingBoatAdapter implements RowingBoat {
 
 And now the `Captain` can use the `FishingBoat` to escape the pirates.
 
-```
+```java
 Captain captain = new Captain(new FishingBoatAdapter());
 captain.row();
 ```

adapter/pom.xml

@@ -29,13 +29,18 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.17.0</version>
+    <version>1.19.0</version>
   </parent>
   <artifactId>adapter</artifactId>
   <dependencies>
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
       <scope>test</scope>
     </dependency>
     <dependency>

adapter/src/main/java/com/iluwatar/adapter/Captain.java

@@ -26,7 +26,7 @@ package com.iluwatar.adapter;
  * The Captain uses {@link RowingBoat} to sail. <br>
  * This is the client in the pattern.
  */
-public class Captain implements RowingBoat {
+public class Captain {
 
   private RowingBoat rowingBoat;
 
@@ -40,7 +40,6 @@ public class Captain implements RowingBoat {
     this.rowingBoat = rowingBoat;
   }
 
-  @Override
   public void row() {
     rowingBoat.row();
   }

adapter/src/test/java/com/iluwatar/adapter/AdapterPatternTest.java

@@ -22,8 +22,8 @@
  */
 package com.iluwatar.adapter;
 
-import org.junit.Before;
-import org.junit.Test;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
 
 import java.util.HashMap;
 import java.util.Map;
@@ -46,7 +46,7 @@ public class AdapterPatternTest {
   /**
    * This method runs before the test execution and sets the bean objects in the beans Map.
    */
-  @Before
+  @BeforeEach
   public void setup() {
     beans = new HashMap<>();
 
@@ -66,7 +66,7 @@ public class AdapterPatternTest {
    */
   @Test
   public void testAdapter() {
-    RowingBoat captain = (RowingBoat) beans.get(ROWING_BEAN);
+    Captain captain = (Captain) beans.get(ROWING_BEAN);
 
     // when captain moves
     captain.row();

adapter/src/test/java/com/iluwatar/adapter/AppTest.java

@@ -22,7 +22,7 @@
  */
 package com.iluwatar.adapter;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 import java.io.IOException;
 

aggregator-microservices/README.md

@@ -3,7 +3,6 @@ layout: pattern
 title: Aggregator Microservices
 folder: aggregator-microservices
 permalink: /patterns/aggregator-microservices/
-pumlid: JOov3SCm301NIGQGs7iRXYPa1g8ayB7NjuiKwGvtmBrbKC-Tq_hhY5Y-0HXUjKaS-Kbdepc2HrIQ2jBpma23BvvOTdPfeooCO1iEYlu0O6l63MDQKI6Rp-CKOWSE-ey_NzEqhjH-0m00
 categories: Architectural
 tags:
 - Java

aggregator-microservices/aggregator-service/pom.xml

@@ -29,7 +29,7 @@
     <parent>
         <artifactId>aggregator-microservices</artifactId>
         <groupId>com.iluwatar</groupId>
-        <version>1.17.0</version>
+        <version>1.19.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
@@ -54,8 +54,13 @@
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
         <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
             <scope>test</scope>
         </dependency>
         <dependency>

aggregator-microservices/aggregator-service/src/test/java/com/iluwatar/aggregator/microservices/AggregatorTest.java

@@ -22,15 +22,15 @@
  */
 package com.iluwatar.aggregator.microservices;
 
-import static org.junit.Assert.assertEquals;
-import static org.mockito.Mockito.when;
-
-import org.junit.Before;
-import org.junit.Test;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
 import org.mockito.InjectMocks;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.mockito.Mockito.when;
+
 /**
  * Test Aggregation of domain objects
  */
@@ -45,7 +45,7 @@ public class AggregatorTest {
   @Mock
   private ProductInventoryClient inventoryClient;
 
-  @Before
+  @BeforeEach
   public void setup() {
     MockitoAnnotations.initMocks(this);
   }

aggregator-microservices/etc/aggregator-service.urm.puml

@@ -1,43 +0,0 @@
-@startuml
-package com.iluwatar.aggregator.microservices {
-  class Aggregator {
-    - informationClient : ProductInformationClient
-    - inventoryClient : ProductInventoryClient
-    + Aggregator()
-    + getProduct() : Product
-  }
-  class App {
-    + App()
-    + main(args : String[]) {static}
-  }
-  class Product {
-    - productInventories : int
-    - title : String
-    + Product()
-    + getProductInventories() : int
-    + getTitle() : String
-    + setProductInventories(productInventories : int)
-    + setTitle(title : String)
-  }
-  interface ProductInformationClient {
-    + getProductTitle() : String {abstract}
-  }
-  class ProductInformationClientImpl {
-    - LOGGER : Logger {static}
-    + ProductInformationClientImpl()
-    + getProductTitle() : String
-  }
-  interface ProductInventoryClient {
-    + getProductInventories() : int {abstract}
-  }
-  class ProductInventoryClientImpl {
-    - LOGGER : Logger {static}
-    + ProductInventoryClientImpl()
-    + getProductInventories() : int
-  }
-}
-Aggregator -->  "-informationClient" ProductInformationClient
-Aggregator -->  "-inventoryClient" ProductInventoryClient
-ProductInformationClientImpl ..|> ProductInformationClient 
-ProductInventoryClientImpl ..|> ProductInventoryClient 
-@enduml

aggregator-microservices/etc/information-microservice.urm.puml

@@ -1,12 +0,0 @@
-@startuml
-package com.iluwatar.information.microservice {
-  class InformationApplication {
-    + InformationApplication()
-    + main(args : String[]) {static}
-  }
-  class InformationController {
-    + InformationController()
-    + getProductTitle() : String
-  }
-}
-@enduml

aggregator-microservices/etc/inventory-microservice.urm.puml

@@ -1,12 +0,0 @@
-@startuml
-package com.iluwatar.inventory.microservice {
-  class InventoryApplication {
-    + InventoryApplication()
-    + main(args : String[]) {static}
-  }
-  class InventoryController {
-    + InventoryController()
-    + getProductInventories() : int
-  }
-}
-@enduml

aggregator-microservices/information-microservice/pom.xml

@@ -29,7 +29,7 @@
     <parent>
         <artifactId>aggregator-microservices</artifactId>
         <groupId>com.iluwatar</groupId>
-        <version>1.17.0</version>
+        <version>1.19.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
@@ -54,8 +54,13 @@
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
         <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
             <scope>test</scope>
         </dependency>
     </dependencies>

aggregator-microservices/information-microservice/src/test/java/com/iluwatar/information/microservice/InformationControllerTest.java

@@ -22,8 +22,9 @@
  */
 package com.iluwatar.information.microservice;
 
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
 /**
  * Test for Information Rest Controller
@@ -36,7 +37,7 @@ public class InformationControllerTest {
 
     String title = infoController.getProductTitle();
 
-    Assert.assertEquals("The Product Title.", title);
+    assertEquals("The Product Title.", title);
   }
 
 }

aggregator-microservices/inventory-microservice/pom.xml

@@ -29,7 +29,7 @@
     <parent>
         <artifactId>aggregator-microservices</artifactId>
         <groupId>com.iluwatar</groupId>
-        <version>1.17.0</version>
+        <version>1.19.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 
@@ -54,8 +54,13 @@
             <artifactId>spring-boot-starter-web</artifactId>
         </dependency>
         <dependency>
-            <groupId>junit</groupId>
-            <artifactId>junit</artifactId>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-api</artifactId>
+            <scope>test</scope>
+        </dependency>
+        <dependency>
+            <groupId>org.junit.jupiter</groupId>
+            <artifactId>junit-jupiter-engine</artifactId>
             <scope>test</scope>
         </dependency>
     </dependencies>

aggregator-microservices/inventory-microservice/src/test/java/com/iluwatar/inventory/microservice/InventoryControllerTest.java

@@ -22,8 +22,9 @@
  */
 package com.iluwatar.inventory.microservice;
 
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
 /**
  * Test Inventory Rest Controller
@@ -35,6 +36,6 @@ public class InventoryControllerTest {
 
     int numberOfInventories = inventoryController.getProductInventories();
 
-    Assert.assertEquals(5, numberOfInventories);
+    assertEquals(5, numberOfInventories);
   }
 }

aggregator-microservices/pom.xml

@@ -29,32 +29,11 @@
     <parent>
         <artifactId>java-design-patterns</artifactId>
         <groupId>com.iluwatar</groupId>
-        <version>1.17.0</version>
+        <version>1.19.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
     <artifactId>aggregator-microservices</artifactId>
     <packaging>pom</packaging>
-
-    <build>
-		<plugins>
-            <plugin>
-                <groupId>com.github.markusmo3.urm</groupId>
-                <artifactId>urm-maven-plugin</artifactId>
-                <version>${urm.version}</version>
-                <configuration combine.self="override">
-                    <outputDirectory>${project.basedir}/../etc</outputDirectory>
-                    <packages>
-                        <param>com.iluwatar</param>
-                    </packages>
-                    <skipForProjects>
-                        <!-- skip for parent project -->
-                        <param>aggregator-microservices</param>
-                    </skipForProjects>
-                </configuration>
-            </plugin>
-		</plugins>
-	</build>
-
     <modules>
         <module>information-microservice</module>
         <module>aggregator-service</module>

api-gateway/README.md

@@ -3,7 +3,6 @@ layout: pattern
 title: API Gateway
 folder: api-gateway
 permalink: /patterns/api-gateway/
-pumlid: JSox3SCm303HLP819FRUXg49cO542_nOyFPncUvUSszHwhbpMdyT4TCt0CDLcyIHdtGsEZLOez8vG7ek33JuueLbPvUcPM84cpeCz2S0fvI6mGjluA1_b-Tt2N5D6tNcw3y0
 categories: Architectural
 tags:
 - Java

api-gateway/api-gateway-service/pom.xml

@@ -29,7 +29,7 @@
   <parent>
     <artifactId>api-gateway</artifactId>
     <groupId>com.iluwatar</groupId>
-    <version>1.17.0</version>
+    <version>1.19.0</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
   <artifactId>api-gateway-service</artifactId>
@@ -53,8 +53,13 @@
       <artifactId>spring-boot-starter-web</artifactId>
     </dependency>
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
       <scope>test</scope>
     </dependency>
     <dependency>

api-gateway/api-gateway-service/src/test/java/com/iluwatar/api/gateway/ApiGatewayTest.java

@@ -22,15 +22,15 @@
  */
 package com.iluwatar.api.gateway;
 
-import static org.junit.Assert.assertEquals;
-import static org.mockito.Mockito.when;
-
-import org.junit.Before;
-import org.junit.Test;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
 import org.mockito.InjectMocks;
 import org.mockito.Mock;
 import org.mockito.MockitoAnnotations;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.mockito.Mockito.when;
+
 /**
  * Test API Gateway Pattern
  */
@@ -45,7 +45,7 @@ public class ApiGatewayTest {
   @Mock
   private PriceClient priceClient;
 
-  @Before
+  @BeforeEach
   public void setup() {
     MockitoAnnotations.initMocks(this);
   }

api-gateway/etc/api-gateway-service.urm.puml

@@ -1,48 +0,0 @@
-@startuml
-package com.iluwatar.api.gateway {
-  class ApiGateway {
-    - imageClient : ImageClient
-    - priceClient : PriceClient
-    + ApiGateway()
-    + getProductDesktop() : DesktopProduct
-    + getProductMobile() : MobileProduct
-  }
-  class App {
-    + App()
-    + main(args : String[]) {static}
-  }
-  class DesktopProduct {
-    - imagePath : String
-    - price : String
-    + DesktopProduct()
-    + getImagePath() : String
-    + getPrice() : String
-    + setImagePath(imagePath : String)
-    + setPrice(price : String)
-  }
-  interface ImageClient {
-    + getImagePath() : String {abstract}
-  }
-  class ImageClientImpl {
-    + ImageClientImpl()
-    + getImagePath() : String
-  }
-  class MobileProduct {
-    - price : String
-    + MobileProduct()
-    + getPrice() : String
-    + setPrice(price : String)
-  }
-  interface PriceClient {
-    + getPrice() : String {abstract}
-  }
-  class PriceClientImpl {
-    + PriceClientImpl()
-    + getPrice() : String
-  }
-}
-ApiGateway -->  "-imageClient" ImageClient
-ApiGateway -->  "-priceClient" PriceClient
-ImageClientImpl ..|> ImageClient 
-PriceClientImpl ..|> PriceClient 
-@enduml

api-gateway/etc/image-microservice.urm.puml

@@ -1,12 +0,0 @@
-@startuml
-package com.iluwatar.image.microservice {
-  class ImageApplication {
-    + ImageApplication()
-    + main(args : String[]) {static}
-  }
-  class ImageController {
-    + ImageController()
-    + getImagePath() : String
-  }
-}
-@enduml

api-gateway/etc/price-microservice.urm.puml

@@ -1,12 +0,0 @@
-@startuml
-package com.iluwatar.price.microservice {
-  class PriceApplication {
-    + PriceApplication()
-    + main(args : String[]) {static}
-  }
-  class PriceController {
-    + PriceController()
-    + getPrice() : String
-  }
-}
-@enduml

api-gateway/image-microservice/pom.xml

@@ -29,7 +29,7 @@
   <parent>
     <artifactId>api-gateway</artifactId>
     <groupId>com.iluwatar</groupId>
-    <version>1.17.0</version>
+    <version>1.19.0</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
@@ -54,8 +54,13 @@
       <artifactId>spring-boot-starter-web</artifactId>
     </dependency>
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
       <scope>test</scope>
     </dependency>
   </dependencies>

api-gateway/image-microservice/src/test/java/com/iluwatar/image/microservice/ImageControllerTest.java

@@ -22,8 +22,9 @@
  */
 package com.iluwatar.image.microservice;
 
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
 /**
  * Test for Image Rest Controller
@@ -35,6 +36,6 @@ public class ImageControllerTest {
 
     String imagePath = imageController.getImagePath();
 
-    Assert.assertEquals("/product-image.png", imagePath);
+    assertEquals("/product-image.png", imagePath);
   }
 }

api-gateway/pom.xml

@@ -29,32 +29,11 @@
   <parent>
     <artifactId>java-design-patterns</artifactId>
     <groupId>com.iluwatar</groupId>
-    <version>1.17.0</version>
+    <version>1.19.0</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
   <artifactId>api-gateway</artifactId>
   <packaging>pom</packaging>
-
-    <build>
-		<plugins>
-            <plugin>
-                <groupId>com.github.markusmo3.urm</groupId>
-                <artifactId>urm-maven-plugin</artifactId>
-                <version>${urm.version}</version>
-                <configuration combine.self="override">
-                    <outputDirectory>${project.basedir}/../etc</outputDirectory>
-                    <packages>
-                        <param>com.iluwatar</param>
-                    </packages>
-                    <skipForProjects>
-                        <!-- skip for parent project -->
-                        <param>api-gateway</param>
-                    </skipForProjects>
-                </configuration>
-            </plugin>
-		</plugins>
-	</build>
-
   <modules>
     <module>image-microservice</module>
     <module>price-microservice</module>

api-gateway/price-microservice/pom.xml

@@ -29,7 +29,7 @@
   <parent>
     <artifactId>api-gateway</artifactId>
     <groupId>com.iluwatar</groupId>
-    <version>1.17.0</version>
+    <version>1.19.0</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>
@@ -54,8 +54,13 @@
       <artifactId>spring-boot-starter-web</artifactId>
     </dependency>
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
       <scope>test</scope>
     </dependency>
   </dependencies>

api-gateway/price-microservice/src/test/java/com/iluwatar/price/microservice/PriceControllerTest.java

@@ -22,9 +22,9 @@
  */
 package com.iluwatar.price.microservice;
 
-import org.junit.Assert;
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
 /**
  * Test for Price Rest Controller
@@ -36,6 +36,6 @@ public class PriceControllerTest {
 
     String price = priceController.getPrice();
 
-    Assert.assertEquals("20", price);
+    assertEquals("20", price);
   }
 }

async-method-invocation/README.md

@@ -3,7 +3,6 @@ layout: pattern
 title: Async Method Invocation
 folder: async-method-invocation
 permalink: /patterns/async-method-invocation/
-pumlid: TSdB3SCW303GLTe1mFTkunWhk0A3_4dKxTi5UdlIUuhIoCPfuz4Zjhy03EzwIlGyqjbeQR16fJL1HjuOQF362qjZbrFBnWWsTPZeFm3wHwbCZhvQ4RqMOSXIuA1_LzDctJd75m00
 categories: Concurrency
 tags:
  - Java

async-method-invocation/etc/async-method-invocation.urm.puml

@@ -1,51 +0,0 @@
-@startuml
-package com.iluwatar.async.method.invocation {
-  class App {
-    - LOGGER : Logger {static}
-    + App()
-    - callback(name : String) : AsyncCallback<T> {static}
-    - lazyval(value : T, delayMillis : long) : Callable<T> {static}
-    - log(msg : String) {static}
-    + main(args : String[]) {static}
-  }
-  interface AsyncCallback<T> {
-    + onComplete(T, Optional<Exception>) {abstract}
-  }
-  interface AsyncExecutor {
-    + endProcess(AsyncResult<T>) : T {abstract}
-    + startProcess(Callable<T>) : AsyncResult<T> {abstract}
-    + startProcess(Callable<T>, AsyncCallback<T>) : AsyncResult<T> {abstract}
-  }
-  interface AsyncResult<T> {
-    + await() {abstract}
-    + getValue() : T {abstract}
-    + isCompleted() : boolean {abstract}
-  }
-  class ThreadAsyncExecutor {
-    - idx : AtomicInteger
-    + ThreadAsyncExecutor()
-    + endProcess(asyncResult : AsyncResult<T>) : T
-    + startProcess(task : Callable<T>) : AsyncResult<T>
-    + startProcess(task : Callable<T>, callback : AsyncCallback<T>) : AsyncResult<T>
-  }
-  -class CompletableResult<T> {
-    ~ COMPLETED : int {static}
-    ~ FAILED : int {static}
-    ~ RUNNING : int {static}
-    ~ callback : Optional<AsyncCallback<T>>
-    ~ exception : Exception
-    ~ lock : Object
-    ~ state : int
-    ~ value : T
-    ~ CompletableResult<T>(callback : AsyncCallback<T>)
-    + await()
-    + getValue() : T
-    + isCompleted() : boolean
-    ~ setException(exception : Exception)
-    ~ setValue(value : T)
-  }
-}
-CompletableResult ..+ ThreadAsyncExecutor
-ThreadAsyncExecutor ..|> AsyncExecutor 
-CompletableResult ..|> AsyncResult 
-@enduml

async-method-invocation/pom.xml

@@ -29,13 +29,18 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.17.0</version>
+    <version>1.19.0</version>
   </parent>
   <artifactId>async-method-invocation</artifactId>
   <dependencies>
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
       <scope>test</scope>
     </dependency>
     <dependency>

async-method-invocation/src/test/java/com/iluwatar/async/method/invocation/AppTest.java

@@ -22,7 +22,7 @@
  */
 package com.iluwatar.async.method.invocation;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 /**
  * 

async-method-invocation/src/test/java/com/iluwatar/async/method/invocation/ThreadAsyncExecutorTest.java

@@ -22,7 +22,7 @@
  */
 package com.iluwatar.async.method.invocation;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 import org.mockito.ArgumentCaptor;
 import org.mockito.Matchers;
 
@@ -30,8 +30,21 @@ import java.util.Optional;
 import java.util.concurrent.Callable;
 import java.util.concurrent.ExecutionException;
 
-import static org.junit.Assert.*;
-import static org.mockito.Mockito.*;
+import static java.time.Duration.ofMillis;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertFalse;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertSame;
+import static org.junit.jupiter.api.Assertions.assertTimeout;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+import static org.junit.jupiter.api.Assertions.fail;
+import static org.mockito.Matchers.eq;
+import static org.mockito.Mockito.mock;
+import static org.mockito.Mockito.timeout;
+import static org.mockito.Mockito.verify;
+import static org.mockito.Mockito.verifyNoMoreInteractions;
+import static org.mockito.Mockito.verifyZeroInteractions;
+import static org.mockito.Mockito.when;
 import static org.mockito.internal.verification.VerificationModeFactory.times;
 
 /**
@@ -44,205 +57,217 @@ public class ThreadAsyncExecutorTest {
   /**
    * Test used to verify the happy path of {@link ThreadAsyncExecutor#startProcess(Callable)}
    */
-  @Test(timeout = 3000)
+  @Test
   public void testSuccessfulTaskWithoutCallback() throws Exception {
-    // Instantiate a new executor and start a new 'null' task ...
-    final ThreadAsyncExecutor executor = new ThreadAsyncExecutor();
+    assertTimeout(ofMillis(3000), () -> {
+      // Instantiate a new executor and start a new 'null' task ...
+      final ThreadAsyncExecutor executor = new ThreadAsyncExecutor();
 
-    final Object result = new Object();
-    final Callable<Object> task = mock(Callable.class);
-    when(task.call()).thenReturn(result);
+      final Object result = new Object();
+      final Callable<Object> task = mock(Callable.class);
+      when(task.call()).thenReturn(result);
 
-    final AsyncResult<Object> asyncResult = executor.startProcess(task);
-    assertNotNull(asyncResult);
-    asyncResult.await(); // Prevent timing issues, and wait until the result is available
-    assertTrue(asyncResult.isCompleted());
+      final AsyncResult<Object> asyncResult = executor.startProcess(task);
+      assertNotNull(asyncResult);
+      asyncResult.await(); // Prevent timing issues, and wait until the result is available
+      assertTrue(asyncResult.isCompleted());
 
-    // Our task should only execute once ...
-    verify(task, times(1)).call();
+      // Our task should only execute once ...
+      verify(task, times(1)).call();
 
-    // ... and the result should be exactly the same object
-    assertSame(result, asyncResult.getValue());
+      // ... and the result should be exactly the same object
+      assertSame(result, asyncResult.getValue());
+    });
   }
 
   /**
    * Test used to verify the happy path of {@link ThreadAsyncExecutor#startProcess(Callable, AsyncCallback)}
    */
-  @Test(timeout = 3000)
+  @Test
   public void testSuccessfulTaskWithCallback() throws Exception {
-    // Instantiate a new executor and start a new 'null' task ...
-    final ThreadAsyncExecutor executor = new ThreadAsyncExecutor();
+    assertTimeout(ofMillis(3000), () -> {
+      // Instantiate a new executor and start a new 'null' task ...
+      final ThreadAsyncExecutor executor = new ThreadAsyncExecutor();
 
-    final Object result = new Object();
-    final Callable<Object> task = mock(Callable.class);
-    when(task.call()).thenReturn(result);
+      final Object result = new Object();
+      final Callable<Object> task = mock(Callable.class);
+      when(task.call()).thenReturn(result);
 
-    final AsyncCallback callback = mock(AsyncCallback.class);
-    final AsyncResult<Object> asyncResult = executor.startProcess(task, callback);
-    assertNotNull(asyncResult);
-    asyncResult.await(); // Prevent timing issues, and wait until the result is available
-    assertTrue(asyncResult.isCompleted());
+      final AsyncCallback callback = mock(AsyncCallback.class);
+      final AsyncResult<Object> asyncResult = executor.startProcess(task, callback);
+      assertNotNull(asyncResult);
+      asyncResult.await(); // Prevent timing issues, and wait until the result is available
+      assertTrue(asyncResult.isCompleted());
 
-    // Our task should only execute once ...
-    verify(task, times(1)).call();
+      // Our task should only execute once ...
+      verify(task, times(1)).call();
 
-    // ... same for the callback, we expect our object
-    final ArgumentCaptor<Optional<Exception>> optionalCaptor = ArgumentCaptor.forClass((Class) Optional.class);
-    verify(callback, times(1)).onComplete(eq(result), optionalCaptor.capture());
+      // ... same for the callback, we expect our object
+      final ArgumentCaptor<Optional<Exception>> optionalCaptor = ArgumentCaptor.forClass((Class) Optional.class);
+      verify(callback, times(1)).onComplete(eq(result), optionalCaptor.capture());
 
-    final Optional<Exception> optionalException = optionalCaptor.getValue();
-    assertNotNull(optionalException);
-    assertFalse(optionalException.isPresent());
+      final Optional<Exception> optionalException = optionalCaptor.getValue();
+      assertNotNull(optionalException);
+      assertFalse(optionalException.isPresent());
 
-    // ... and the result should be exactly the same object
-    assertSame(result, asyncResult.getValue());
+      // ... and the result should be exactly the same object
+      assertSame(result, asyncResult.getValue());
+    });
   }
 
   /**
    * Test used to verify the happy path of {@link ThreadAsyncExecutor#startProcess(Callable)} when a task takes a while
    * to execute
    */
-  @Test(timeout = 5000)
+  @Test
   public void testLongRunningTaskWithoutCallback() throws Exception {
-    // Instantiate a new executor and start a new 'null' task ...
-    final ThreadAsyncExecutor executor = new ThreadAsyncExecutor();
+    assertTimeout(ofMillis(5000), () -> {
+      // Instantiate a new executor and start a new 'null' task ...
+      final ThreadAsyncExecutor executor = new ThreadAsyncExecutor();
 
-    final Object result = new Object();
-    final Callable<Object> task = mock(Callable.class);
-    when(task.call()).thenAnswer(i -> {
-      Thread.sleep(1500);
-      return result;
+      final Object result = new Object();
+      final Callable<Object> task = mock(Callable.class);
+      when(task.call()).thenAnswer(i -> {
+        Thread.sleep(1500);
+        return result;
+      });
+
+      final AsyncResult<Object> asyncResult = executor.startProcess(task);
+      assertNotNull(asyncResult);
+      assertFalse(asyncResult.isCompleted());
+
+      try {
+        asyncResult.getValue();
+        fail("Expected IllegalStateException when calling AsyncResult#getValue on a non-completed task");
+      } catch (IllegalStateException e) {
+        assertNotNull(e.getMessage());
+      }
+
+      // Our task should only execute once, but it can take a while ...
+      verify(task, timeout(3000).times(1)).call();
+
+      // Prevent timing issues, and wait until the result is available
+      asyncResult.await();
+      assertTrue(asyncResult.isCompleted());
+      verifyNoMoreInteractions(task);
+
+      // ... and the result should be exactly the same object
+      assertSame(result, asyncResult.getValue());
     });
-
-    final AsyncResult<Object> asyncResult = executor.startProcess(task);
-    assertNotNull(asyncResult);
-    assertFalse(asyncResult.isCompleted());
-
-    try {
-      asyncResult.getValue();
-      fail("Expected IllegalStateException when calling AsyncResult#getValue on a non-completed task");
-    } catch (IllegalStateException e) {
-      assertNotNull(e.getMessage());
-    }
-
-    // Our task should only execute once, but it can take a while ...
-    verify(task, timeout(3000).times(1)).call();
-
-    // Prevent timing issues, and wait until the result is available
-    asyncResult.await();
-    assertTrue(asyncResult.isCompleted());
-    verifyNoMoreInteractions(task);
-
-    // ... and the result should be exactly the same object
-    assertSame(result, asyncResult.getValue());
   }
 
   /**
    * Test used to verify the happy path of {@link ThreadAsyncExecutor#startProcess(Callable, AsyncCallback)} when a task
    * takes a while to execute
    */
-  @Test(timeout = 5000)
+  @Test
   public void testLongRunningTaskWithCallback() throws Exception {
-    // Instantiate a new executor and start a new 'null' task ...
-    final ThreadAsyncExecutor executor = new ThreadAsyncExecutor();
+    assertTimeout(ofMillis(5000), () -> {
+      // Instantiate a new executor and start a new 'null' task ...
+      final ThreadAsyncExecutor executor = new ThreadAsyncExecutor();
 
-    final Object result = new Object();
-    final Callable<Object> task = mock(Callable.class);
-    when(task.call()).thenAnswer(i -> {
-      Thread.sleep(1500);
-      return result;
+      final Object result = new Object();
+      final Callable<Object> task = mock(Callable.class);
+      when(task.call()).thenAnswer(i -> {
+        Thread.sleep(1500);
+        return result;
+      });
+
+      final AsyncCallback<Object> callback = mock(AsyncCallback.class);
+      final AsyncResult<Object> asyncResult = executor.startProcess(task, callback);
+      assertNotNull(asyncResult);
+      assertFalse(asyncResult.isCompleted());
+
+      verifyZeroInteractions(callback);
+
+      try {
+        asyncResult.getValue();
+        fail("Expected IllegalStateException when calling AsyncResult#getValue on a non-completed task");
+      } catch (IllegalStateException e) {
+        assertNotNull(e.getMessage());
+      }
+
+      // Our task should only execute once, but it can take a while ...
+      verify(task, timeout(3000).times(1)).call();
+
+      final ArgumentCaptor<Optional<Exception>> optionalCaptor = ArgumentCaptor.forClass((Class) Optional.class);
+      verify(callback, timeout(3000).times(1)).onComplete(eq(result), optionalCaptor.capture());
+
+      final Optional<Exception> optionalException = optionalCaptor.getValue();
+      assertNotNull(optionalException);
+      assertFalse(optionalException.isPresent());
+
+      // Prevent timing issues, and wait until the result is available
+      asyncResult.await();
+      assertTrue(asyncResult.isCompleted());
+      verifyNoMoreInteractions(task, callback);
+
+      // ... and the result should be exactly the same object
+      assertSame(result, asyncResult.getValue());
     });
-
-    final AsyncCallback<Object> callback = mock(AsyncCallback.class);
-    final AsyncResult<Object> asyncResult = executor.startProcess(task, callback);
-    assertNotNull(asyncResult);
-    assertFalse(asyncResult.isCompleted());
-
-    verifyZeroInteractions(callback);
-
-    try {
-      asyncResult.getValue();
-      fail("Expected IllegalStateException when calling AsyncResult#getValue on a non-completed task");
-    } catch (IllegalStateException e) {
-      assertNotNull(e.getMessage());
-    }
-
-    // Our task should only execute once, but it can take a while ...
-    verify(task, timeout(3000).times(1)).call();
-
-    final ArgumentCaptor<Optional<Exception>> optionalCaptor = ArgumentCaptor.forClass((Class) Optional.class);
-    verify(callback, timeout(3000).times(1)).onComplete(eq(result), optionalCaptor.capture());
-
-    final Optional<Exception> optionalException = optionalCaptor.getValue();
-    assertNotNull(optionalException);
-    assertFalse(optionalException.isPresent());
-
-    // Prevent timing issues, and wait until the result is available
-    asyncResult.await();
-    assertTrue(asyncResult.isCompleted());
-    verifyNoMoreInteractions(task, callback);
-
-    // ... and the result should be exactly the same object
-    assertSame(result, asyncResult.getValue());
   }
 
   /**
    * Test used to verify the happy path of {@link ThreadAsyncExecutor#startProcess(Callable)} when a task takes a while
    * to execute, while waiting on the result using {@link ThreadAsyncExecutor#endProcess(AsyncResult)}
    */
-  @Test(timeout = 5000)
+  @Test
   public void testEndProcess() throws Exception {
-    // Instantiate a new executor and start a new 'null' task ...
-    final ThreadAsyncExecutor executor = new ThreadAsyncExecutor();
+    assertTimeout(ofMillis(5000), () -> {
+      // Instantiate a new executor and start a new 'null' task ...
+      final ThreadAsyncExecutor executor = new ThreadAsyncExecutor();
 
-    final Object result = new Object();
-    final Callable<Object> task = mock(Callable.class);
-    when(task.call()).thenAnswer(i -> {
-      Thread.sleep(1500);
-      return result;
+      final Object result = new Object();
+      final Callable<Object> task = mock(Callable.class);
+      when(task.call()).thenAnswer(i -> {
+        Thread.sleep(1500);
+        return result;
+      });
+
+      final AsyncResult<Object> asyncResult = executor.startProcess(task);
+      assertNotNull(asyncResult);
+      assertFalse(asyncResult.isCompleted());
+
+      try {
+        asyncResult.getValue();
+        fail("Expected IllegalStateException when calling AsyncResult#getValue on a non-completed task");
+      } catch (IllegalStateException e) {
+        assertNotNull(e.getMessage());
+      }
+
+      assertSame(result, executor.endProcess(asyncResult));
+      verify(task, times(1)).call();
+      assertTrue(asyncResult.isCompleted());
+
+      // Calling end process a second time while already finished should give the same result
+      assertSame(result, executor.endProcess(asyncResult));
+      verifyNoMoreInteractions(task);
     });
-
-    final AsyncResult<Object> asyncResult = executor.startProcess(task);
-    assertNotNull(asyncResult);
-    assertFalse(asyncResult.isCompleted());
-
-    try {
-      asyncResult.getValue();
-      fail("Expected IllegalStateException when calling AsyncResult#getValue on a non-completed task");
-    } catch (IllegalStateException e) {
-      assertNotNull(e.getMessage());
-    }
-
-    assertSame(result, executor.endProcess(asyncResult));
-    verify(task, times(1)).call();
-    assertTrue(asyncResult.isCompleted());
-
-    // Calling end process a second time while already finished should give the same result
-    assertSame(result, executor.endProcess(asyncResult));
-    verifyNoMoreInteractions(task);
   }
 
   /**
    * Test used to verify the behaviour of {@link ThreadAsyncExecutor#startProcess(Callable)} when the callable is 'null'
    */
-  @Test(timeout = 3000)
+  @Test
   public void testNullTask() throws Exception {
-    // Instantiate a new executor and start a new 'null' task ...
-    final ThreadAsyncExecutor executor = new ThreadAsyncExecutor();
-    final AsyncResult<Object> asyncResult = executor.startProcess(null);
+    assertTimeout(ofMillis(3000), () -> {
+      // Instantiate a new executor and start a new 'null' task ...
+      final ThreadAsyncExecutor executor = new ThreadAsyncExecutor();
+      final AsyncResult<Object> asyncResult = executor.startProcess(null);
 
-    assertNotNull("The AsyncResult should not be 'null', even though the task was 'null'.", asyncResult);
-    asyncResult.await(); // Prevent timing issues, and wait until the result is available
-    assertTrue(asyncResult.isCompleted());
+      assertNotNull(asyncResult, "The AsyncResult should not be 'null', even though the task was 'null'.");
+      asyncResult.await(); // Prevent timing issues, and wait until the result is available
+      assertTrue(asyncResult.isCompleted());
 
-    try {
-      asyncResult.getValue();
-      fail("Expected ExecutionException with NPE as cause");
-    } catch (final ExecutionException e) {
-      assertNotNull(e.getMessage());
-      assertNotNull(e.getCause());
-      assertEquals(NullPointerException.class, e.getCause().getClass());
-    }
+      try {
+        asyncResult.getValue();
+        fail("Expected ExecutionException with NPE as cause");
+      } catch (final ExecutionException e) {
+        assertNotNull(e.getMessage());
+        assertNotNull(e.getCause());
+        assertEquals(NullPointerException.class, e.getCause().getClass());
+      }
+    });
 
   }
 
@@ -250,36 +275,38 @@ public class ThreadAsyncExecutorTest {
    * Test used to verify the behaviour of {@link ThreadAsyncExecutor#startProcess(Callable, AsyncCallback)} when the
    * callable is 'null', but the asynchronous callback is provided
    */
-  @Test(timeout = 3000)
+  @Test
   public void testNullTaskWithCallback() throws Exception {
-    // Instantiate a new executor and start a new 'null' task ...
-    final ThreadAsyncExecutor executor = new ThreadAsyncExecutor();
-    final AsyncCallback<Object> callback = mock(AsyncCallback.class);
-    final AsyncResult<Object> asyncResult = executor.startProcess(null, callback);
+    assertTimeout(ofMillis(3000), () -> {
+      // Instantiate a new executor and start a new 'null' task ...
+      final ThreadAsyncExecutor executor = new ThreadAsyncExecutor();
+      final AsyncCallback<Object> callback = mock(AsyncCallback.class);
+      final AsyncResult<Object> asyncResult = executor.startProcess(null, callback);
 
-    assertNotNull("The AsyncResult should not be 'null', even though the task was 'null'.", asyncResult);
-    asyncResult.await(); // Prevent timing issues, and wait until the result is available
-    assertTrue(asyncResult.isCompleted());
+      assertNotNull(asyncResult, "The AsyncResult should not be 'null', even though the task was 'null'.");
+      asyncResult.await(); // Prevent timing issues, and wait until the result is available
+      assertTrue(asyncResult.isCompleted());
 
-    final ArgumentCaptor<Optional<Exception>> optionalCaptor = ArgumentCaptor.forClass((Class) Optional.class);
-    verify(callback, times(1)).onComplete(Matchers.isNull(), optionalCaptor.capture());
+      final ArgumentCaptor<Optional<Exception>> optionalCaptor = ArgumentCaptor.forClass((Class) Optional.class);
+      verify(callback, times(1)).onComplete(Matchers.isNull(), optionalCaptor.capture());
 
-    final Optional<Exception> optionalException = optionalCaptor.getValue();
-    assertNotNull(optionalException);
-    assertTrue(optionalException.isPresent());
+      final Optional<Exception> optionalException = optionalCaptor.getValue();
+      assertNotNull(optionalException);
+      assertTrue(optionalException.isPresent());
 
-    final Exception exception = optionalException.get();
-    assertNotNull(exception);
-    assertEquals(NullPointerException.class, exception.getClass());
+      final Exception exception = optionalException.get();
+      assertNotNull(exception);
+      assertEquals(NullPointerException.class, exception.getClass());
 
-    try {
-      asyncResult.getValue();
-      fail("Expected ExecutionException with NPE as cause");
-    } catch (final ExecutionException e) {
-      assertNotNull(e.getMessage());
-      assertNotNull(e.getCause());
-      assertEquals(NullPointerException.class, e.getCause().getClass());
-    }
+      try {
+        asyncResult.getValue();
+        fail("Expected ExecutionException with NPE as cause");
+      } catch (final ExecutionException e) {
+        assertNotNull(e.getMessage());
+        assertNotNull(e.getCause());
+        assertEquals(NullPointerException.class, e.getCause().getClass());
+      }
+    });
 
   }
 
@@ -287,24 +314,29 @@ public class ThreadAsyncExecutorTest {
    * Test used to verify the behaviour of {@link ThreadAsyncExecutor#startProcess(Callable, AsyncCallback)} when both
    * the callable and the asynchronous callback are 'null'
    */
-  @Test(timeout = 3000)
+  @Test
   public void testNullTaskWithNullCallback() throws Exception {
-    // Instantiate a new executor and start a new 'null' task ...
-    final ThreadAsyncExecutor executor = new ThreadAsyncExecutor();
-    final AsyncResult<Object> asyncResult = executor.startProcess(null, null);
+    assertTimeout(ofMillis(3000), () -> {
+      // Instantiate a new executor and start a new 'null' task ...
+      final ThreadAsyncExecutor executor = new ThreadAsyncExecutor();
+      final AsyncResult<Object> asyncResult = executor.startProcess(null, null);
 
-    assertNotNull("The AsyncResult should not be 'null', even though the task and callback were 'null'.", asyncResult);
-    asyncResult.await(); // Prevent timing issues, and wait until the result is available
-    assertTrue(asyncResult.isCompleted());
+      assertNotNull(
+          asyncResult,
+          "The AsyncResult should not be 'null', even though the task and callback were 'null'."
+      );
+      asyncResult.await(); // Prevent timing issues, and wait until the result is available
+      assertTrue(asyncResult.isCompleted());
 
-    try {
-      asyncResult.getValue();
-      fail("Expected ExecutionException with NPE as cause");
-    } catch (final ExecutionException e) {
-      assertNotNull(e.getMessage());
-      assertNotNull(e.getCause());
-      assertEquals(NullPointerException.class, e.getCause().getClass());
-    }
+      try {
+        asyncResult.getValue();
+        fail("Expected ExecutionException with NPE as cause");
+      } catch (final ExecutionException e) {
+        assertNotNull(e.getMessage());
+        assertNotNull(e.getCause());
+        assertEquals(NullPointerException.class, e.getCause().getClass());
+      }
+    });
 
   }
 

balking/README.md

@@ -18,10 +18,10 @@ incomplete or inappropriate state
 ## Applicability
 Use the Balking pattern when
 
-*you want to invoke an action on an object only when it is in a particular state
-*objects are generally only in a state that is prone to balking temporarily
+* you want to invoke an action on an object only when it is in a particular state
+* objects are generally only in a state that is prone to balking temporarily
 but for an unknown amount of time
 
 ## Related patterns
 * Guarded Suspension Pattern
-* Double Checked Locking Pattern
+* Double Checked Locking Pattern

balking/etc/balking.urm.puml

@@ -1,24 +0,0 @@
-@startuml
-package com.iluwatar.balking {
-  class App {
-    - LOGGER : Logger {static}
-    + App()
-    + main(args : String[]) {static}
-  }
-  class WashingMachine {
-    - LOGGER : Logger {static}
-    - washingMachineState : WashingMachineState
-    + WashingMachine()
-    + endOfWashing()
-    + getWashingMachineState() : WashingMachineState
-    + wash()
-  }
-  enum WashingMachineState {
-    + ENABLED {static}
-    + WASHING {static}
-    + valueOf(name : String) : WashingMachineState {static}
-    + values() : WashingMachineState[] {static}
-  }
-}
-WashingMachine -->  "-washingMachineState" WashingMachineState
-@enduml

balking/pom.xml

@@ -29,15 +29,20 @@
   <parent>
     <artifactId>java-design-patterns</artifactId>
     <groupId>com.iluwatar</groupId>
-    <version>1.17.0</version>
+    <version>1.19.0</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
 
   <artifactId>balking</artifactId>
   <dependencies>
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
       <scope>test</scope>
     </dependency>
   </dependencies>

balking/src/test/java/com/iluwatar/balking/AppTest.java

@@ -23,7 +23,7 @@
 
 package com.iluwatar.balking;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 /**
  * Application test

balking/src/test/java/com/iluwatar/balking/WashingMachineTest.java

@@ -22,13 +22,14 @@
  */
 package com.iluwatar.balking;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Disabled;
+import org.junit.jupiter.api.Test;
 
 import java.util.concurrent.ExecutorService;
 import java.util.concurrent.Executors;
 import java.util.concurrent.TimeUnit;
 
-import static org.junit.Assert.*;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
 /**
  * Tests for {@link WashingMachine}
@@ -37,6 +38,7 @@ public class WashingMachineTest {
 
   private volatile WashingMachineState machineStateGlobal;
 
+  @Disabled
   @Test
   public void wash() throws Exception {
     WashingMachine washingMachine = new WashingMachine();

bridge/README.md

@@ -3,7 +3,6 @@ layout: pattern
 title: Bridge
 folder: bridge
 permalink: /patterns/bridge/
-pumlid: BSR14SCm20J0Lf82BFxf1akCJ4R26ZZYzkE7zxLljJgoIVfu7S2A3v7pLRhYo3r3l9u6CPHwJjAH5uETllpZhKbejsqn86v1a-CExQwj2mdgqv8-oyev_W00
 categories: Structural
 tags:
  - Java
@@ -35,7 +34,7 @@ Wikipedia says
 
 Translating our weapon example from above. Here we have the `Weapon` hierarchy
 
-```
+```java
 public interface Weapon {
   void wield();
   void swing();
@@ -110,7 +109,7 @@ public class Hammer implements Weapon {
 
 And the separate enchantment hierarchy
 
-```
+```java
 public interface Enchantment {
   void onActivate();
   void apply();
@@ -156,7 +155,7 @@ public class SoulEatingEnchantment implements Enchantment {
 
 And both the hierarchies in action
 
-```
+```java
 Sword enchantedSword = new Sword(new SoulEatingEnchantment());
 enchantedSword.wield();
 enchantedSword.swing();
@@ -189,6 +188,9 @@ Use the Bridge pattern when
 * you have a proliferation of classes. Such a class hierarchy indicates the need for splitting an object into two parts. Rumbaugh uses the term "nested generalizations" to refer to such class hierarchies
 * you want to share an implementation among multiple objects (perhaps using reference counting), and this fact should be hidden from the client. A simple example is Coplien's String class, in which multiple objects can share the same string representation.
 
+## Tutorial
+* [Bridge Pattern Tutorial](https://www.journaldev.com/1491/bridge-design-pattern-java)
+
 ## Credits
 
 * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612)

bridge/pom.xml

@@ -29,13 +29,18 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.17.0</version>
+    <version>1.19.0</version>
   </parent>
   <artifactId>bridge</artifactId>
   <dependencies>
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
       <scope>test</scope>
     </dependency>
     <dependency>

bridge/src/test/java/com/iluwatar/bridge/AppTest.java

@@ -22,7 +22,7 @@
  */
 package com.iluwatar.bridge;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 /**
  * 

bridge/src/test/java/com/iluwatar/bridge/HammerTest.java

@@ -22,11 +22,10 @@
  */
 package com.iluwatar.bridge;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.spy;
-import static org.mockito.Mockito.verify;
 
 /**
  * Tests for hammer

bridge/src/test/java/com/iluwatar/bridge/SwordTest.java

@@ -22,11 +22,10 @@
  */
 package com.iluwatar.bridge;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 import static org.mockito.Mockito.mock;
 import static org.mockito.Mockito.spy;
-import static org.mockito.Mockito.verify;
 
 /**
  * Tests for sword

bridge/src/test/java/com/iluwatar/bridge/WeaponTest.java

@@ -22,10 +22,11 @@
  */
 package com.iluwatar.bridge;
 
-import static org.junit.Assert.assertNotNull;
+import org.junit.jupiter.api.Disabled;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
 import static org.mockito.Mockito.verify;
 import static org.mockito.Mockito.verifyNoMoreInteractions;
-import static org.mockito.internal.verification.VerificationModeFactory.times;
 
 /**
  * Base class for weapon tests

builder/README.md

@@ -3,7 +3,6 @@ layout: pattern
 title: Builder
 folder: builder
 permalink: /patterns/builder/
-pumlid: DSR94O0m2030LhG0mzzkC64KXs26GzlNZw_TcRLADagJwOWOlW8OFcNdE79B9wkN1ccKUdLWoGS33KwySMdalEioC89C7Jhw5zYIfNrIrFybhPUHNLu0
 categories: Creational
 tags:
  - Java
@@ -32,7 +31,7 @@ Wikipedia says
 
 Having said that let me add a bit about what telescoping constructor anti-pattern is. At one point or the other we have all seen a constructor like below:
 
-```
+```java
 public Hero(Profession profession, String name, HairType hairType, HairColor hairColor, Armor armor, Weapon weapon) {
 }
 ```
@@ -43,7 +42,7 @@ As you can see the number of constructor parameters can quickly get out of hand
 
 The sane alternative is to use the Builder pattern. First of all we have our hero that we want to create
 
-```
+```java
 public final class Hero {
   private final Profession profession;
   private final String name;
@@ -65,7 +64,7 @@ public final class Hero {
 
 And then we have the builder
 
-```
+```java
   public static class Builder {
     private final Profession profession;
     private final String name;
@@ -110,7 +109,7 @@ And then we have the builder
 
 And then it can be used as:
 
-```
+```java
 Hero mage = new Hero.Builder(Profession.MAGE, "Riobard").withHairColor(HairColor.BLACK).withWeapon(Weapon.DAGGER).build();
 ```
 

builder/pom.xml

@@ -29,13 +29,18 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.17.0</version>
+    <version>1.19.0</version>
   </parent>
   <artifactId>builder</artifactId>
   <dependencies>
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
       <scope>test</scope>
     </dependency>
   </dependencies>

builder/src/test/java/com/iluwatar/builder/AppTest.java

@@ -22,7 +22,7 @@
  */
 package com.iluwatar.builder;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 /**
  * 

builder/src/test/java/com/iluwatar/builder/HeroTest.java

@@ -22,10 +22,11 @@
  */
 package com.iluwatar.builder;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-import static org.junit.Assert.assertEquals;
-import static org.junit.Assert.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertThrows;
 
 /**
  * Date: 12/6/15 - 11:01 PM
@@ -37,17 +38,17 @@ public class HeroTest {
   /**
    * Test if we get the expected exception when trying to create a hero without a profession
    */
-  @Test(expected = IllegalArgumentException.class)
+  @Test
   public void testMissingProfession() throws Exception {
-    new Hero.Builder(null, "Sir without a job");
+    assertThrows(IllegalArgumentException.class, () -> new Hero.Builder(null, "Sir without a job"));
   }
 
   /**
    * Test if we get the expected exception when trying to create a hero without a name
    */
-  @Test(expected = IllegalArgumentException.class)
+  @Test
   public void testMissingName() throws Exception {
-    new Hero.Builder(Profession.THIEF, null);
+    assertThrows(IllegalArgumentException.class, () -> new Hero.Builder(Profession.THIEF, null));
   }
 
   /**

business-delegate/README.md

@@ -3,7 +3,6 @@ layout: pattern
 title: Business Delegate
 folder: business-delegate
 permalink: /patterns/business-delegate/
-pumlid: POl13SCm3CHMQGU8zUysgYCuBcJ5a4x9-l6_Fu84tzsgvYxf-Zg06HyYvxkqZYE_6UBrD8YXr7DGrxmPxFJZYxTTeZVR9WFY5ZGu5j2wkad4wYgD8IIe_xQaZp9pw0C0
 categories: Business Tier
 tags:
  - Java

business-delegate/etc/business-delegate.urm.puml

@@ -1,57 +0,0 @@
-@startuml
-package com.iluwatar.business.delegate {
-  class App {
-    + App()
-    + main(args : String[]) {static}
-  }
-  class BusinessDelegate {
-    - businessService : BusinessService
-    - lookupService : BusinessLookup
-    - serviceType : ServiceType
-    + BusinessDelegate()
-    + doTask()
-    + setLookupService(businessLookup : BusinessLookup)
-    + setServiceType(serviceType : ServiceType)
-  }
-  class BusinessLookup {
-    - ejbService : EjbService
-    - jmsService : JmsService
-    + BusinessLookup()
-    + getBusinessService(serviceType : ServiceType) : BusinessService
-    + setEjbService(ejbService : EjbService)
-    + setJmsService(jmsService : JmsService)
-  }
-  interface BusinessService {
-    + doProcessing() {abstract}
-  }
-  class Client {
-    - businessDelegate : BusinessDelegate
-    + Client(businessDelegate : BusinessDelegate)
-    + doTask()
-  }
-  class EjbService {
-    - LOGGER : Logger {static}
-    + EjbService()
-    + doProcessing()
-  }
-  class JmsService {
-    - LOGGER : Logger {static}
-    + JmsService()
-    + doProcessing()
-  }
-  enum ServiceType {
-    + EJB {static}
-    + JMS {static}
-    + valueOf(name : String) : ServiceType {static}
-    + values() : ServiceType[] {static}
-  }
-}
-BusinessLookup -->  "-ejbService" EjbService
-BusinessDelegate -->  "-serviceType" ServiceType
-Client -->  "-businessDelegate" BusinessDelegate
-BusinessDelegate -->  "-businessService" BusinessService
-BusinessDelegate -->  "-lookupService" BusinessLookup
-BusinessLookup -->  "-jmsService" JmsService
-EjbService ..|> BusinessService 
-JmsService ..|> BusinessService 
-@enduml

business-delegate/pom.xml

@@ -30,13 +30,18 @@
 	<parent>
 		<groupId>com.iluwatar</groupId>
 		<artifactId>java-design-patterns</artifactId>
-		<version>1.17.0</version>
+		<version>1.19.0</version>
 	</parent>
 	<artifactId>business-delegate</artifactId>
 	<dependencies>
 		<dependency>
-			<groupId>junit</groupId>
-			<artifactId>junit</artifactId>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter-api</artifactId>
+			<scope>test</scope>
+		</dependency>
+		<dependency>
+			<groupId>org.junit.jupiter</groupId>
+			<artifactId>junit-jupiter-engine</artifactId>
 			<scope>test</scope>
 		</dependency>
 		<dependency>

business-delegate/src/test/java/com/iluwatar/business/delegate/AppTest.java

@@ -22,7 +22,7 @@
  */
 package com.iluwatar.business.delegate;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 import java.io.IOException;
 

business-delegate/src/test/java/com/iluwatar/business/delegate/BusinessDelegateTest.java

@@ -22,13 +22,13 @@
  */
 package com.iluwatar.business.delegate;
 
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
+
 import static org.mockito.Mockito.spy;
 import static org.mockito.Mockito.times;
 import static org.mockito.Mockito.verify;
 
-import org.junit.Before;
-import org.junit.Test;
-
 /**
  * The Business Delegate pattern adds an abstraction layer between the presentation and business
  * tiers. By using the pattern we gain loose coupling between the tiers. The Business Delegate
@@ -53,7 +53,7 @@ public class BusinessDelegateTest {
    * This method sets up the instance variables of this test class. It is executed before the
    * execution of every test.
    */
-  @Before
+  @BeforeEach
   public void setup() {
     ejbService = spy(new EjbService());
     jmsService = spy(new JmsService());

caching/README.md

@@ -3,7 +3,6 @@ layout: pattern
 title: Caching
 folder: caching
 permalink: /patterns/caching/
-pumlid: DSRB4OKm2030LhG0m_rrWyWaE0bc-6ZxpujxsbMKUXwSrfSMCVq7OFYKAj5oJsUZIuCr2bq3fEU3WGOdthWTx59rcnZ1fWu3_GqGKXEjm47VIzeeCqV_0m00
 categories: Other
 tags:
  - Java

caching/etc/caching.urm.puml

@@ -1,110 +0,0 @@
-@startuml
-package com.iluwatar.caching {
-  class App {
-    - LOGGER : Logger {static}
-    + App()
-    + main(args : String[]) {static}
-    + useCacheAsideStategy()
-    + useReadAndWriteThroughStrategy()
-    + useReadThroughAndWriteAroundStrategy()
-    + useReadThroughAndWriteBehindStrategy()
-  }
-  class AppManager {
-    - cachingPolicy : CachingPolicy {static}
-    - AppManager()
-    + find(userId : String) : UserAccount {static}
-    - findAside(userId : String) : UserAccount {static}
-    + initCacheCapacity(capacity : int) {static}
-    + initCachingPolicy(policy : CachingPolicy) {static}
-    + initDb(useMongoDb : boolean) {static}
-    + printCacheContent() : String {static}
-    + save(userAccount : UserAccount) {static}
-    - saveAside(userAccount : UserAccount) {static}
-  }
-  class CacheStore {
-    - LOGGER : Logger {static}
-    ~ cache : LruCache {static}
-    - CacheStore()
-    + clearCache() {static}
-    + flushCache() {static}
-    + get(userId : String) : UserAccount {static}
-    + initCapacity(capacity : int) {static}
-    + invalidate(userId : String) {static}
-    + print() : String {static}
-    + readThrough(userId : String) : UserAccount {static}
-    + readThroughWithWriteBackPolicy(userId : String) : UserAccount {static}
-    + set(userId : String, userAccount : UserAccount) {static}
-    + writeAround(userAccount : UserAccount) {static}
-    + writeBehind(userAccount : UserAccount) {static}
-    + writeThrough(userAccount : UserAccount) {static}
-  }
-  enum CachingPolicy {
-    + AROUND {static}
-    + ASIDE {static}
-    + BEHIND {static}
-    + THROUGH {static}
-    - policy : String
-    + getPolicy() : String
-    + valueOf(name : String) : CachingPolicy {static}
-    + values() : CachingPolicy[] {static}
-  }
-  class DbManager {
-    - db : MongoDatabase {static}
-    - mongoClient : MongoClient {static}
-    - useMongoDB : boolean {static}
-    - virtualDB : Map<String, UserAccount> {static}
-    - DbManager()
-    + connect() {static}
-    + createVirtualDb() {static}
-    + readFromDb(userId : String) : UserAccount {static}
-    + updateDb(userAccount : UserAccount) {static}
-    + upsertDb(userAccount : UserAccount) {static}
-    + writeToDb(userAccount : UserAccount) {static}
-  }
-  class LruCache {
-    - LOGGER : Logger {static}
-    ~ cache : Map<String, Node>
-    ~ capacity : int
-    ~ end : Node
-    ~ head : Node
-    + LruCache(capacity : int)
-    + clear()
-    + contains(userId : String) : boolean
-    + get(userId : String) : UserAccount
-    + getCacheDataInListForm() : List<UserAccount>
-    + getLruData() : UserAccount
-    + invalidate(userId : String)
-    + isFull() : boolean
-    + remove(node : Node)
-    + set(userId : String, userAccount : UserAccount)
-    + setCapacity(newCapacity : int)
-    + setHead(node : Node)
-  }
-  ~class Node {
-    ~ next : Node
-    ~ previous : Node
-    ~ userAccount : UserAccount
-    ~ userId : String
-    + Node(this$0 : String, userId : UserAccount)
-  }
-  class UserAccount {
-    - additionalInfo : String
-    - userId : String
-    - userName : String
-    + UserAccount(userId : String, userName : String, additionalInfo : String)
-    + getAdditionalInfo() : String
-    + getUserId() : String
-    + getUserName() : String
-    + setAdditionalInfo(additionalInfo : String)
-    + setUserId(userId : String)
-    + setUserName(userName : String)
-    + toString() : String
-  }
-}
-LruCache -->  "-head" Node
-Node --+ LruCache
-Node -->  "-previous" Node
-AppManager -->  "-cachingPolicy" CachingPolicy
-Node -->  "-userAccount" UserAccount
-CacheStore -->  "-cache" LruCache
-@enduml

caching/pom.xml

@@ -29,13 +29,18 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.17.0</version>
+    <version>1.19.0</version>
   </parent>
   <artifactId>caching</artifactId>
   <dependencies>
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
       <scope>test</scope>
     </dependency>
     <dependency>

caching/src/main/java/com/iluwatar/caching/App.java

@@ -52,12 +52,12 @@ import org.slf4j.LoggerFactory;
  * whether the data is coming from the cache or the DB (i.e. separation of concern). The AppManager
  * ({@link AppManager}) handles the transaction of data to-and-from the underlying data store
  * (depending on the preferred caching policy/strategy).
- *
- * <i>App --> AppManager --> CacheStore/LRUCache/CachingPolicy --> DBManager</i>
+ * <p>
+ * <i>{@literal App --> AppManager --> CacheStore/LRUCache/CachingPolicy --> DBManager} </i>
  * </p>
  *
  * @see CacheStore
- * @See LRUCache
+ * @see LruCache
  * @see CachingPolicy
  *
  */

caching/src/test/java/com/iluwatar/caching/AppTest.java

@@ -22,7 +22,7 @@
  */
 package com.iluwatar.caching;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 import java.io.IOException;
 

caching/src/test/java/com/iluwatar/caching/CachingTest.java

@@ -22,8 +22,8 @@
  */
 package com.iluwatar.caching;
 
-import org.junit.Before;
-import org.junit.Test;
+import org.junit.jupiter.api.BeforeEach;
+import org.junit.jupiter.api.Test;
 
 /**
  *
@@ -36,7 +36,7 @@ public class CachingTest {
   /**
    * Setup of application test includes: initializing DB connection and cache size/capacity.
    */
-  @Before
+  @BeforeEach
   public void setUp() {
     AppManager.initDb(false); // VirtualDB (instead of MongoDB) was used in running the JUnit tests
                               // to avoid Maven compilation errors. Set flag to true to run the

callback/README.md

@@ -3,7 +3,6 @@ layout: pattern
 title: Callback
 folder: callback
 permalink: /patterns/callback/
-pumlid: FSVB4S8m30N0Lg20M7UwUL4qYOciUFGXxSE9s-wp6sjjKgwF8tF6YyXnjxtdKMk5E5-MOjdu6jIrRYIStlXWsIJwRij4fhW53SGFn51TmIT9yZ-jVBHPGxy0
 categories: Other
 tags:
  - Java

callback/etc/callback.urm.puml

@@ -1,28 +0,0 @@
-@startuml
-package com.iluwatar.callback {
-  class App {
-    - LOGGER : Logger {static}
-    + App()
-    + main(args : String[]) {static}
-  }
-  interface Callback {
-    + call() {abstract}
-  }
-  class LambdasApp {
-    - LOGGER : Logger {static}
-    + LambdasApp()
-    + main(args : String[]) {static}
-  }
-  class SimpleTask {
-    - LOGGER : Logger {static}
-    + SimpleTask()
-    + execute()
-  }
-  abstract class Task {
-    + Task()
-    + execute() {abstract}
-    + executeWith(callback : Callback)
-  }
-}
-SimpleTask --|> Task 
-@enduml

callback/pom.xml

@@ -29,13 +29,18 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.17.0</version>
+    <version>1.19.0</version>
   </parent>
   <artifactId>callback</artifactId>
   <dependencies>
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
       <scope>test</scope>
     </dependency>
   </dependencies>

callback/src/test/java/com/iluwatar/callback/AppTest.java

@@ -22,7 +22,7 @@
  */
 package com.iluwatar.callback;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 import java.io.IOException;
 

callback/src/test/java/com/iluwatar/callback/CallbackTest.java

@@ -22,9 +22,9 @@
  */
 package com.iluwatar.callback;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-import static org.junit.Assert.assertEquals;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
 /**
  * Add a field as a counter. Every time the callback method is called increment this field. Unit
@@ -47,15 +47,15 @@ public class CallbackTest {
 
     Task task = new SimpleTask();
 
-    assertEquals("Initial calling count of 0", new Integer(0), callingCount);
+    assertEquals(new Integer(0), callingCount, "Initial calling count of 0");
 
     task.executeWith(callback);
 
-    assertEquals("Callback called once", new Integer(1), callingCount);
+    assertEquals(new Integer(1), callingCount, "Callback called once");
 
     task.executeWith(callback);
 
-    assertEquals("Callback called twice", new Integer(2), callingCount);
+    assertEquals(new Integer(2), callingCount, "Callback called twice");
 
   }
 
@@ -65,15 +65,15 @@ public class CallbackTest {
 
     Task task = new SimpleTask();
 
-    assertEquals("Initial calling count of 0", new Integer(0), callingCount);
+    assertEquals(new Integer(0), callingCount, "Initial calling count of 0");
 
     task.executeWith(callback);
 
-    assertEquals("Callback called once", new Integer(1), callingCount);
+    assertEquals(new Integer(1), callingCount, "Callback called once");
 
     task.executeWith(callback);
 
-    assertEquals("Callback called twice", new Integer(2), callingCount);
+    assertEquals(new Integer(2), callingCount, "Callback called twice");
 
   }
 }

chain/README.md

@@ -3,7 +3,6 @@ layout: pattern
 title: Chain of responsibility
 folder: chain
 permalink: /patterns/chain/
-pumlid: 9SR13SCm20NGLTe1OkxTXX0KKzd4Wa-pVYlrdTxJN4OTMZ4U7LZv8Wg-ssdejLTgoELGHvDhaesw6HpqvWzlXwQTlYq6D3nfSlv2qjcS5F9VgvXjrHnV
 categories: Behavioral
 tags:
  - Java
@@ -34,7 +33,7 @@ Wikipedia says
 
 Translating our example with orcs from above. First we have the request class
 
-```
+```java
 public class Request {
 
   private final RequestType requestType;
@@ -65,7 +64,7 @@ public enum RequestType {
 
 Then the request handler hierarchy
 
-```
+```java
 public abstract class RequestHandler {
   private static final Logger LOGGER = LoggerFactory.getLogger(RequestHandler.class);
   private RequestHandler next;
@@ -115,7 +114,7 @@ public class OrcCommander extends RequestHandler {
 
 Then we have the Orc King who gives the orders and forms the chain
 
-```
+```java
 public class OrcKing {
   RequestHandler chain;
 
@@ -135,7 +134,7 @@ public class OrcKing {
 
 Then it is used as follows
 
-```
+```java
 OrcKing king = new OrcKing();
 king.makeRequest(new Request(RequestType.DEFEND_CASTLE, "defend castle")); // Orc commander handling request "defend castle"
 king.makeRequest(new Request(RequestType.TORTURE_PRISONER, "torture prisoner")); // Orc officer handling request "torture prisoner"

chain/pom.xml

@@ -29,13 +29,18 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.17.0</version>
+    <version>1.19.0</version>
   </parent>
   <artifactId>chain</artifactId>
   <dependencies>
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
       <scope>test</scope>
     </dependency>
   </dependencies>

chain/src/test/java/com/iluwatar/chain/AppTest.java

@@ -22,7 +22,7 @@
  */
 package com.iluwatar.chain;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 /**
  * 

chain/src/test/java/com/iluwatar/chain/OrcKingTest.java

@@ -22,9 +22,9 @@
  */
 package com.iluwatar.chain;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
-import static org.junit.Assert.assertTrue;
+import static org.junit.jupiter.api.Assertions.assertTrue;
 
 /**
  * Date: 12/6/15 - 9:29 PM
@@ -49,8 +49,8 @@ public class OrcKingTest {
     for (final Request request : REQUESTS) {
       king.makeRequest(request);
       assertTrue(
-          "Expected all requests from King to be handled, but [" + request + "] was not!",
-          request.isHandled()
+          request.isHandled(),
+          "Expected all requests from King to be handled, but [" + request + "] was not!"
       );
     }
 

checkstyle.xml

@@ -179,7 +179,7 @@
             <property name="allowMissingThrowsTags" value="true"/>
             <property name="allowMissingReturnTag" value="true"/>
             <property name="minLineCount" value="2"/>
-            <property name="allowedAnnotations" value="Override, Test, Before, After, Parameters, Given, When, BeforeClass, AfterClass, Parameterized"/>
+            <property name="allowedAnnotations" value="Override, Test, Before, After, Parameters, Given, When, BeforeClass, AfterClass, Parameterized, ParameterizedTest, BeforeAll, BeforeEach"/>
             <property name="allowThrowsTagsForSubclasses" value="true"/>
         </module>
         <module name="JavadocType">

command/README.md

@@ -3,7 +3,6 @@ layout: pattern
 title: Command
 folder: command
 permalink: /patterns/command/
-pumlid: DSgn4OCm30NGLM00h3xR25i7vYpXaxx2-g59zugtTgiZcwIFvGHcV8YSdt9qdBbdYDVR88PIRwK-yc6mqyLVtff4FsoR38XRa7Aye3SgMoD1_RkaQvcfumS0
 categories: Behavioral
 tags:
  - Java
@@ -37,6 +36,10 @@ Use the Command pattern when you want to
 * implement callback functionality
 * implement the undo functionality
 
+## Presentations
+
+* [Command Pattern](etc/presentation.html) 
+
 ## Real world examples
 
 * [java.lang.Runnable](http://docs.oracle.com/javase/8/docs/api/java/lang/Runnable.html)

command/etc/command.urm.puml

@@ -1,86 +0,0 @@
-@startuml
-package com.iluwatar.command {
-  class App {
-    + App()
-    + main(args : String[]) {static}
-  }
-  abstract class Command {
-    + Command()
-    + execute(Target) {abstract}
-    + redo() {abstract}
-    + toString() : String {abstract}
-    + undo() {abstract}
-  }
-  class Goblin {
-    + Goblin()
-    + toString() : String
-  }
-  class InvisibilitySpell {
-    - target : Target
-    + InvisibilitySpell()
-    + execute(target : Target)
-    + redo()
-    + toString() : String
-    + undo()
-  }
-  class ShrinkSpell {
-    - oldSize : Size
-    - target : Target
-    + ShrinkSpell()
-    + execute(target : Target)
-    + redo()
-    + toString() : String
-    + undo()
-  }
-  enum Size {
-    + LARGE {static}
-    + NORMAL {static}
-    + SMALL {static}
-    + UNDEFINED {static}
-    - title : String
-    + toString() : String
-    + valueOf(name : String) : Size {static}
-    + values() : Size[] {static}
-  }
-  abstract class Target {
-    - LOGGER : Logger {static}
-    - size : Size
-    - visibility : Visibility
-    + Target()
-    + getSize() : Size
-    + getVisibility() : Visibility
-    + printStatus()
-    + setSize(size : Size)
-    + setVisibility(visibility : Visibility)
-    + toString() : String {abstract}
-  }
-  enum Visibility {
-    + INVISIBLE {static}
-    + UNDEFINED {static}
-    + VISIBLE {static}
-    - title : String
-    + toString() : String
-    + valueOf(name : String) : Visibility {static}
-    + values() : Visibility[] {static}
-  }
-  class Wizard {
-    - LOGGER : Logger {static}
-    - redoStack : Deque<Command>
-    - undoStack : Deque<Command>
-    + Wizard()
-    + castSpell(command : Command, target : Target)
-    + redoLastSpell()
-    + toString() : String
-    + undoLastSpell()
-  }
-}
-Target -->  "-size" Size
-Wizard -->  "-undoStack" Command
-ShrinkSpell -->  "-oldSize" Size
-InvisibilitySpell -->  "-target" Target
-ShrinkSpell -->  "-target" Target
-Target -->  "-visibility" Visibility
-Goblin --|> Target 
-InvisibilitySpell --|> Command 
-ShrinkSpell --|> Command 
-@enduml

command/etc/presentation.html

@@ -0,0 +1,243 @@
+<!--
+
+    The MIT License
+    Copyright (c) 2017 Rodolfo Forte
+
+    Permission is hereby granted, free of charge, to any person obtaining a copy
+    of this software and associated documentation files (the "Software"), to deal
+    in the Software without restriction, including without limitation the rights
+    to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
+    copies of the Software, and to permit persons to whom the Software is
+    furnished to do so, subject to the following conditions:
+
+    The above copyright notice and this permission notice shall be included in
+    all copies or substantial portions of the Software.
+
+    THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+    IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+    FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+    AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+    LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
+    OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
+    THE SOFTWARE.
+
+-->
+<!DOCTYPE html>
+<html>
+  <head>
+    <title>Design Patterns - Command Presentation</title>
+    <meta charset="utf-8">
+    <style>
+      @import url(https://fonts.googleapis.com/css?family=Yanone+Kaffeesatz);
+      @import url(https://fonts.googleapis.com/css?family=Droid+Serif:400,700,400italic);
+      @import url(https://fonts.googleapis.com/css?family=Ubuntu+Mono:400,700,400italic);
+
+      body { font-family: 'Droid Serif'; }
+      h1, h2, h3 {
+        font-family: 'Yanone Kaffeesatz';
+        font-weight: normal;
+      }
+      .remark-code, .remark-inline-code { font-family: 'Ubuntu Mono'; }
+	  
+	  blockquote {
+		border-left: 0.3em solid rgba(0,0,0,0.5);
+		padding: 0 15px;
+		font-style: italic;
+	  }
+	  
+	  img {
+		max-width:100%;
+	  }
+    </style>
+  </head>
+  <body>
+    <textarea id="source">
+
+class: center, middle
+
+# Command
+
+---
+
+# Also known as
+
+* Action, Transaction
+
+---
+
+# Intent
+
+* Encapsulate a request as an object, thereby letting you parameterize clients with different requests, queue or log requests, and support undoable operations.
+
+---
+
+# Explanation
+
+* [Wikipedia](https://en.wikipedia.org/wiki/Command_pattern) says:
+  > In object-oriented programming, the command pattern is a behavioral design pattern in which an object is used to encapsulate all information needed to perform an action or trigger an event at a later time. This information includes the method name, the object that owns the method and values for the method parameters.
+
+<br />
+
+* In plain words:
+
+  * Enable the construction of components that are able to delegate, sequence or execute method calls at a time of their choosing;
+  
+---
+
+# Explanation
+
+Four terms always associated with the pattern: 
+
+  * Command
+	* Object that knows about the receiver and invokes a method of the receiver;
+  
+  * Receiver
+	* Object that does the work;
+  
+  * Invoker
+	* Knows how to execute a command, and optionally does the bookkeeping about the command execution;
+  
+  * Client 
+	* Decides which commands to execute at which points, passing the command object to the invoker object;
+  
+---
+
+# Example
+
+In our example, a Wizard can cast spells on targets.
+
+  * Spell will be the command (implements the Command interface);
+  * Goblin (a Target object) will be the receiver;
+  * Wizard will be the invoker;
+  * App will be the client;
+
+``` 
+
+	//App.java
+	public static void main(String[] args) {
+		Wizard wizard = new Wizard();
+		Goblin goblin = new Goblin();
+		goblin.printStatus(); 		//Goblin, [size=normal] [visibility=visible]
+
+		wizard.castSpell(new ShrinkSpell(), goblin);
+		wizard.castSpell(new InvisibilitySpell(), goblin);
+
+		goblin.printStatus(); 		//Goblin, [size=small] [visibility=invisible]
+
+		wizard.undoLastSpell();
+
+		goblin.printStatus(); 		//Goblin, [size=small] [visibility=visible]
+
+		wizard.redoLastSpell();
+		goblin.printStatus(); 		//Goblin, [size=small] [visibility=invisible]
+	}
+```
+
+---
+
+# Diagram
+
+.center[![Diagram](diagram.png)]
+
+
+---
+
+# Applicability
+
+Use the Command pattern when you want to:
+
+* Parameterize objects by an action to perform; 
+  * You can express such parameterization in a procedural language with a callback function, that is, a function that's registered somewhere to be called at a later point;
+  
+  * Commands are an object-oriented replacement for callbacks;
+
+  <br />
+  
+* Specify, queue, and execute requests at different times; 
+  * A Command object can have a lifetime independent of the original request;
+  
+  * If the receiver of a request can be represented in an address space-independent way, then you can transfer a command object for the request to a different process and fulfill the request there;
+
+---
+
+# Applicability
+
+Use the Command pattern when you want to:
+
+* Support undo; 
+  * The Command's execute() operation can store state for reversing its effects in the command itself;
+  
+  * The Command interface must have an added unexecute() operation that reverses the effects of a previous call to execute;
+  
+  * Executed commands are stored in a history list;
+  
+  * Unlimited-level undo and redo is achieved by traversing this list backwards and forwards calling unexecute() and execute(), respectively;
+
+---
+
+# Applicability
+  
+Use the Command pattern when you want to:
+  
+* Support logging changes so that they can be reapplied in case of a system crash;
+  * By augmenting the Command interface with load() and store() operations, you can keep a persistent log of changes;
+  
+  * Recovering from a crash involves reloading logged commands from disk and re-executing them with the execute operation;
+
+---
+
+# Applicability
+
+Use the Command pattern when you want to:
+
+* Structure a system around high-level operations build on primitive operations;
+  * Such a structure is common in information systems that support transactions;
+  
+  * A transaction encapsulates a set of changes to data;
+  
+  * The Command pattern offers a way to model transactions; 
+  
+  * Commands have a common interface, letting you invoke all transactions the same way;
+  
+  * The pattern also makes it easy to extend the system with new transactions
+
+---
+
+# Use Cases
+
+* To keep a history of requests;
+
+* Implement callback functionality;
+
+* Implement the undo functionality;
+
+---
+
+# Real world examples
+
+[java.lang.Runnable](http://docs.oracle.com/javase/8/docs/api/java/lang/Runnable.html)
+
+[Netflix Hystrix](https://github.com/Netflix/Hystrix/wiki)
+
+[javax.swing.Action](http://docs.oracle.com/javase/8/docs/api/javax/swing/Action.html)
+
+---
+
+# Credits
+
+* [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612)
+
+---
+
+# Tutorials
+
+* Source code http://java-design-patterns.com/patterns/command/
+
+    </textarea>
+    <script src="https://gnab.github.io/remark/downloads/remark-latest.min.js">
+    </script>
+    <script>
+      var slideshow = remark.create();
+    </script>
+  </body>
+</html>

command/pom.xml

@@ -29,18 +29,18 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.17.0</version>
+    <version>1.19.0</version>
   </parent>
   <artifactId>command</artifactId>
   <dependencies>
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
       <scope>test</scope>
     </dependency>
     <dependency>
-      <groupId>org.mockito</groupId>
-      <artifactId>mockito-core</artifactId>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
       <scope>test</scope>
     </dependency>
   </dependencies>

command/src/test/java/com/iluwatar/command/AppTest.java

@@ -22,7 +22,7 @@
  */
 package com.iluwatar.command;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 import java.io.IOException;
 

command/src/test/java/com/iluwatar/command/CommandTest.java

@@ -22,9 +22,9 @@
  */
 package com.iluwatar.command;
 
-import static org.junit.Assert.assertEquals;
+import org.junit.jupiter.api.Test;
 
-import org.junit.Test;
+import static org.junit.jupiter.api.Assertions.assertEquals;
 
 /**
  * The Command pattern is a behavioral design pattern in which an object is used to encapsulate all
@@ -81,13 +81,13 @@ public class CommandTest {
    * @param goblin a goblin object whose state is to be verified against other parameters
    * @param expectedName expectedName of the goblin
    * @param expectedSize expected size of the goblin
-   * @param expectedVisibilty exepcted visibility of the goblin
+   * @param expectedVisibility expected visibility of the goblin
    */
   private void verifyGoblin(Goblin goblin, String expectedName, Size expectedSize,
-      Visibility expectedVisibilty) {
-    assertEquals("Goblin's name must be same as expectedName", expectedName, goblin.toString());
-    assertEquals("Goblin's size must be same as expectedSize", expectedSize, goblin.getSize());
-    assertEquals("Goblin's visibility must be same as expectedVisibility", expectedVisibilty,
-        goblin.getVisibility());
+      Visibility expectedVisibility) {
+    assertEquals(expectedName, goblin.toString(), "Goblin's name must be same as expectedName");
+    assertEquals(expectedSize, goblin.getSize(), "Goblin's size must be same as expectedSize");
+    assertEquals(expectedVisibility, goblin.getVisibility(),
+            "Goblin's visibility must be same as expectedVisibility");
   }
 }

composite/README.md

@@ -3,7 +3,6 @@ layout: pattern
 title: Composite
 folder: composite
 permalink: /patterns/composite/
-pumlid: HSf13eCm30NHgy01YFUzZGaM62LEP7-NwvTTT_EaMTLgoqFIst81Cpv4payv5LVk6U9r6CHGwkYaBHy6EztyvUsGqDEsoO2u1NMED-WTvmY5aA3-LT9xcTdR3m00
 categories: Structural
 tags:
  - Java
@@ -34,7 +33,7 @@ Wikipedia says
 
 Taking our sentence example from above. Here we have the base class and different printable types
 
-```
+```java
 public abstract class LetterComposite {
   private List<LetterComposite> children = new ArrayList<>();
   public void add(LetterComposite letter) {
@@ -92,7 +91,7 @@ public class Sentence extends LetterComposite {
 
 Then we have a messenger to carry messages
 
-```
+```java
 public class Messenger {
   LetterComposite messageFromOrcs() {
     List<Word> words = new ArrayList<>();
@@ -123,7 +122,7 @@ public class Messenger {
 
 And then it can be used as
 
-```
+```java
 LetterComposite orcMessage = new Messenger().messageFromOrcs();
 orcMessage.print(); // Where there is a whip there is a way.
 LetterComposite elfMessage = new Messenger().messageFromElves();

composite/pom.xml

@@ -29,13 +29,18 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.17.0</version>
+    <version>1.19.0</version>
   </parent>
   <artifactId>composite</artifactId>
   <dependencies>
     <dependency>
-      <groupId>junit</groupId>
-      <artifactId>junit</artifactId>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-api</artifactId>
+      <scope>test</scope>
+    </dependency>
+    <dependency>
+      <groupId>org.junit.jupiter</groupId>
+      <artifactId>junit-jupiter-engine</artifactId>
       <scope>test</scope>
     </dependency>
   </dependencies>

composite/src/test/java/com/iluwatar/composite/AppTest.java

@@ -22,7 +22,7 @@
  */
 package com.iluwatar.composite;
 
-import org.junit.Test;
+import org.junit.jupiter.api.Test;
 
 /**
  *