Reached milestone 1.13.0

#211 Document GoF usages from Java API

.travis.yml

@@ -11,8 +11,28 @@ before_install:
 - export DISPLAY=:99.0
 - sh -e /etc/init.d/xvfb start
 
+# default install command is just "mvn install -DskipTests=true -Dmaven.javadoc.skip=true -B -V"
+install:
+- mvn install -DskipTests=true -Dmaven.javadoc.skip=true -B -V -e
+
 after_success:
 - mvn clean test jacoco:report coveralls:report
 - bash update-ghpages.sh
 
+# use latest java version available instead of travis default
+addons:
+  apt:
+    packages:
+      - oracle-java8-installer
+
+notifications:
+  email:
+    - iluwatar@gmail.com
+  webhooks:
+    urls:
+      - https://webhooks.gitter.im/e/3319623945358a093a6f
+    on_success: change  # options: [always|never|change] default: always
+    on_failure: always  # options: [always|never|change] default: always
+    on_start: never     # options: [always|never|change] default: always
+
 sudo: false # route the build to the container-based infrastructure for a faster build

README.md

@@ -24,7 +24,7 @@ are familiar with the patterns.
 # Getting started
 
 Before you dive into the material, you should be familiar with various
-[Programming/Software Design Principles](http://webpro.github.io/programming-principles/).
+Programming/Software Design Principles.
 
 All designs should be as simple as possible. You should start with KISS, YAGNI,
 and Do The Simplest Thing That Could Possibly Work principles. Complexity and

_scripts/postPumlsToServer.firstrun.output

@@ -0,0 +1,190 @@
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+parent: abstract-document; artifact: abstract-document
+Puml Server ID: PSjB3eCm34NHhPG599vtDyQn85L-ifzX-p3lxEf8Twj3MXGDQvyJMFubChxpKN767gucSq07iinEjSNDOACVNvoAUZr6MWoe3QVE_WRnxZ0Mf38b-hkIGlurX_MyehS7
+parent: tolerant-reader; artifact: tolerant-reader
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+parent: event-driven-architecture; artifact: event-driven-architecture
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+parent: model-view-presenter; artifact: model-view-presenter
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+Puml Server ID: NOj93eCm302_KXv0VEzlN6F0bMCYB_3zvjpRQ3IpY97MnkNwEZD7l04SdtP8dlMfOAVBaYqRNHr4wy54Xo_Uk6uSSjWwC9FT0Zh61DYrPY_pyXs9WPF-NIllRLJN7m00
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+parent: visitor; artifact: visitor
+Puml Server ID: DSR14OGm20NGLhG0mtsxmSWeJa8oyD7sTo_xJczLgoqFIM_B1Spu43c_vLHSkMU8rs4GGwcZaxPy6UnqyyFR8Q6dRPC1SGlg7B_Gew4OJeBwVqdlPMPlNm00
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+Puml Server ID: NSbB3iCW303HgpG70Ezx6yTOWSeOv4zp_MRTtUZDCPGa6wV9gqTiVmCOtlKQqVDCPwEbmHgLreGXUMEWmGU_M1hxkBHiZ61JXud-1BILft1fmvz37JZetshQh3kd_000
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+parent: singleton; artifact: singleton
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+I dont want to program this, just add the following lines to the README.md file that corresponds to this puml file 'api-gateway/etc/image-microservice.urm.puml'
+pumlid: 3Sp13SCm2030LTe1RFxTXX3aK1biOOZLxPlVlUujHZrFJk-lAsAk3u3ZhatYoYCNEmqBjgWq5AJdna27BzvOJbxIh4oCOBS5Yki1u9JIC7ZZ3pW8HB5nKI4VJtSBSKtNEbFx7m00
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+I dont want to program this, just add the following lines to the README.md file that corresponds to this puml file 'api-gateway/etc/api-gateway-service.urm.puml'
+pumlid: JSox3SCm303HLP819FRUXg49cO542_nOyFPncUvUSszHwhbpMdyT4TCt0CDLcyIHdtGsEZLOez8vG7ek33JuueLbPvUcPM84cpeCz2S0fvI6mGjluA1_b-Tt2N5D6tNcw3y0
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+I dont want to program this, just add the following lines to the README.md file that corresponds to this puml file 'api-gateway/etc/price-microservice.urm.puml'
+pumlid: 3Sn13iGW243HgqmFeEpdDfGIoqJK8DJqzkFklyq_f56DYyFgvtOVymjWk78Hl-ECoKQzEJVFr1Mana97Wny-c2wUKbeQwCxM9YZE7O13Ka7dXI-m4mmJugH2rlVksSXXcaTe_GC0
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+I dont want to program this, just add the following lines to the README.md file that corresponds to this puml file 'aggregator-microservices/etc/aggregator-service.urm.puml'
+pumlid: JOov3SCm301NIGQGs7iRXYPa1g8ayB7NjuiKwGvtmBrbKC-Tq_hhY5Y-0HXUjKaS-Kbdepc2HrIQ2jBpma23BvvOTdPfeooCO1iEYlu0O6l63MDQKI6Rp-CKOWSE-ey_NzEqhjH-0m00
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+I dont want to program this, just add the following lines to the README.md file that corresponds to this puml file 'aggregator-microservices/etc/information-microservice.urm.puml'
+pumlid: LSnB3i8m303Hgy016k-vZN5DQXGxaJ_jzUcMtKXFcgSOZTgvV3oEp1Kl0CUhTScZtXNiD2tPij5Ka54N9ZfyySHjvv1ksy9CTWjGZ3i0UtVkcDCt5V9vFquX3k0a4FjCLqoPzgUjNDig7Jy0
+parent: aggregator-microservices; artifact: inventory-microservice
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+I dont want to program this, just add the following lines to the README.md file that corresponds to this puml file 'aggregator-microservices/etc/inventory-microservice.urm.puml'
+pumlid: LSpB3G8n303HLg20ZUzqOxnMrYXn8d-oedjovJRIIEyfIYrFJckFAsBw2y3mBbNYodSw6mqDrYWqEaZB6mCDFhZmEDcbwZ4nWaqTEleEm5gDAyQmemlPsCOIOWSE0j6riM7VlrVIUfdPsmy0
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+parent: servant; artifact: servant
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+parent: lazy-loading; artifact: lazy-loading
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+parent: flyweight; artifact: flyweight
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+parent: mutex; artifact: mutex
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+parent: mediator; artifact: mediator
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+parent: page-object; artifact: page-object
+Puml Server ID: JSV14OGW30NGLjO28FVj9iOCua1Wme-sxnxtzjvMJLeS6ju-9p3NbyZvoQNYZ3sMkWo36hACJhN5ms2dYszEXwvQB4q6r6rHv_K3JIwQndwfW1Jo_npUyupUNW00
+parent: factory-kit; artifact: factory-kit
+Puml Server ID: JST15i8m20N0g-W14lRU1YcsQ4BooCS-RwzBTpDNSscvQKQx7C1SDwBWi-w68--vD6Gur55bTBAM9uE3dlpcikcotSjaGCCNTLu_q8C58pxbPI25_Bzcz3gpjoy0
+parent: property; artifact: property
+Puml Server ID: FSV13OCm30NGLTe1YEziumOBKYMEPN-3s9wUUdlltRJst2Izlmx0OYLolihUSEGdGxnEXIXAdODQpul1Jby-UTaasgwBCI2kGOFZ1pAV9ewR1FMVaZwAvUWF
+parent: dependency-injection; artifact: dependency-injection
+Puml Server ID: RSdB3SCW303GLPe1mFTkunWhSGG6-PEesxS3zFQajubIpyPf_NL6B7y363xra3XpJsUZgS4QbUO0wVbWeC65DvR6BeUMXH5iwZ3GVu36YxMnqgU8NamXKu63_aPD6tNbw5y0
+parent: layers; artifact: layers
+Puml Server ID: BSR13OCm30NGLSe0n7UsCS62L8w9x6yGszD3t-bDpQhc9kdwEO0H2v7pNVQ68zSCyNeQn53gsQbftWns-lB5yoRHTfi70-8Mr3b-8UL7F4XG_otflOpi-W80
+parent: producer-consumer; artifact: producer-consumer
+Puml Server ID: PSjB3iCW303HgxG70Ezx6zTO2HKso9_a-c7VtUX9y-vA8nkdZTSPiVm3O7ZNeyUPttGscXgiKMaAz94t1XhyyCBIsFkXPM44cpe8-WvODbiIMzcdfspXe7-jQL9NodW0
+parent: builder; artifact: builder
+Puml Server ID: DSR94O0m2030LhG0mzzkC64KXs26GzlNZw_TcRLADagJwOWOlW8OFcNdE79B9wkN1ccKUdLWoGS33KwySMdalEioC89C7Jhw5zYIfNrIrFybhPUHNLu0
+parent: specification; artifact: specification
+Puml Server ID: LSX14i8m20NGg-W16lRU1YcsE0d9mCTUNxVkthoxkVJQjQBVJc3bWoZuQeVXh6UbXao7EfhCGTRhOd3Gcp-yxPfs-BOOqF2amVa3vLAnbmd3ffD2_gTLZBPgz2y0
+parent: state; artifact: state
+Puml Server ID: 9SRH3O0m20N0LNG0ox_RO2LQqz867hg-9jxNpKLpZLt2wdG2mrSYuoST1MTiuMAvAqIHSczKQZmCDhhuvcKNBuSkWm4nTMhiNyZ141BaVocifH6jlW00
+parent: reader-writer-lock; artifact: reader-writer-lock
+Puml Server ID: RSZB4S8m303HLg00MtUw4R8cCP5bZpwuVL80jttxx4gIZTFaSKOiVm4OxdhqEFETpaPJWpKgpG5TScEWmGU_M1fxFxGiZ61JXu5-1nXZOolR-gqYaoxWe3-xfeswSiWF
+parent: interpreter; artifact: interpreter
+Puml Server ID: JSf13eCm30NHgz034E-vZGaM62Kcih_BzQ6xxjv8yr6hBJT9RzC1Z5Y8dE-oAuvSCyJhPH13gLSdRNapsEdaBy-RXEus3mR4BQXpl21zVnykFmlgVvVqNaRszW00
+parent: template-method; artifact: template-method
+Puml Server ID: NSZ13SCW30NGLPe1mFTkuu0Lg6n0vZjPlpttzlIEFef6bN1zDM3jDv7paw-E5cTiyJ87P22NQTGr7WOxVVZcL6NtQwJ5WFZOPBn_88WjPKWoGPkL1EN_ShZb5QPV
+parent: feature-toggle; artifact: feature-toggle
+Puml Server ID: NSZ14G8X30NGLhG0oDrk8XjPd12OvCTjNy_UthpxiAPvIBhUJc37WyZvgdtWp6U6U5i6CTIs9WtDYy5ER_vmEIH6jx8P4BUWoV43lOIHBWMhTnKIjB-gwRFkdFe5
+parent: business-delegate; artifact: business-delegate
+Puml Server ID: POl13SCm3CHMQGU8zUysgYCuBcJ5a4x9-l6_Fu84tzsgvYxf-Zg06HyYvxkqZYE_6UBrD8YXr7DGrxmPxFJZYxTTeZVR9WFY5ZGu5j2wkad4wYgD8IIe_xQaZp9pw0C0
+parent: naked-objects; artifact: naked-objects-integtests
+Puml Server ID: LSmn4iCW30NHgoG70FMvZGmQ6ni48tt5ru_RT3kls7VJqgDAM7yTmF8FaV6TzuOZjd2nCXMYo6KEQZrk1XkT_ELKnTkkQJ4Wfaw3_GbIlgIckPrIu2Ge_vBQyziX3izX8wyO_GS0
+I dont want to program this, just add the following lines to the README.md file that corresponds to this puml file 'naked-objects/etc/naked-objects-integtests.urm.puml'
+pumlid: LSmn4iCW30NHgoG70FMvZGmQ6ni48tt5ru_RT3kls7VJqgDAM7yTmF8FaV6TzuOZjd2nCXMYo6KEQZrk1XkT_ELKnTkkQJ4Wfaw3_GbIlgIckPrIu2Ge_vBQyziX3izX8wyO_GS0
+parent: naked-objects; artifact: naked-objects-dom
+Puml Server ID: LSZ94SCW3030Lf82G7zt8mkDZOC4eyDkF_dcjxFlhZIoSTfudH7BDm33fnuzpjpJsMXgi4QbAT17FXXeSE6DfR7tGyl223Pr4FGVGF73hSpzOWe73lgVqgRKDAahPNm1
+I dont want to program this, just add the following lines to the README.md file that corresponds to this puml file 'naked-objects/etc/naked-objects-dom.urm.puml'
+pumlid: LSZ94SCW3030Lf82G7zt8mkDZOC4eyDkF_dcjxFlhZIoSTfudH7BDm33fnuzpjpJsMXgi4QbAT17FXXeSE6DfR7tGyl223Pr4FGVGF73hSpzOWe73lgVqgRKDAahPNm1
+parent: naked-objects; artifact: naked-objects-fixture
+Puml Server ID: LSX15i8W30N0g-W187jlaq9igH1uoO_r-BfrDs_kJKkFAc7zTW3B7qJ6LzuRZjZ2nSfKY2ANEQZrk1XiTFARKnLlkwR5W9Ww3VOVIFabDStjb08dGVcVz6mVX4aE6td5w5y0
+I dont want to program this, just add the following lines to the README.md file that corresponds to this puml file 'naked-objects/etc/naked-objects-fixture.urm.puml'
+pumlid: LSX15i8W30N0g-W187jlaq9igH1uoO_r-BfrDs_kJKkFAc7zTW3B7qJ6LzuRZjZ2nSfKY2ANEQZrk1XiTFARKnLlkwR5W9Ww3VOVIFabDStjb08dGVcVz6mVX4aE6td5w5y0
+parent: model-view-controller; artifact: model-view-controller
+Puml Server ID: ROl13SCm201NQGUm-NSRQgE42h258Lw_wR-_qvtkoTOaEwNBuuoOwmNWkEl1SUOx5taR5cHHsr1WoOs13X-yi7HQV5YP645k2nJN3Q2ZavIBQPVVwqFajXJjVwdfMcUgV040
+parent: proxy; artifact: proxy
+Puml Server ID: 9SR13OCm30NGLM00udktCS62eCI9x6yesrEfx_Jcehd69c5rEe3X7oBZE-q5HwpXOhahH95oRrHgt0msEldYPHClkow30J5rQko_qB3-VKYG_qjXBOrezGK0
+parent: memento; artifact: memento
+Puml Server ID: DSgn4OCm30NGLM00h3xR2AC3SvRiaxx2-g59zugtDgiz3qdlomNC-10vF-Lik7BF4A_388PIXrBh-J3OwUOlRuT4EssR38XRa7Ay81Lz_o11_RkaQvcf_GS0
+parent: decorator; artifact: decorator
+Puml Server ID: HSV14SCm20J0Lk82BFxf1YF6LaP26ZZizfDVVhjRC-bPDRs_Bc35cyZvAMV3bKU6kao36ehCGQtdms2d3z-yLursshuOKBUWmV43LPNfZEcaaFzA-YWhH_y2
+parent: data-mapper; artifact: data-mapper
+Puml Server ID: JShB3OGm303HLg20nFVjnYGM1CN6ycTfVtFSsnjfzY5jPgUqkLqHwXy0mxUU8wuyqidQ8q4IjJqCO-QBWGOtVh5qyd5AKOmW4mT6Nu2-ZiAekapH_hkcSTNa-GC0
+parent: caching; artifact: caching
+Puml Server ID: DSRB4OKm2030LhG0m_rrWyWaE0bc-6ZxpujxsbMKUXwSrfSMCVq7OFYKAj5oJsUZIuCr2bq3fEU3WGOdthWTx59rcnZ1fWu3_GqGKXEjm47VIzeeCqV_0m00
+parent: reactor; artifact: reactor
+Puml Server ID: DSR14OGm20NGLjO23FVj1f7Hx2Ga0nzjVxtuJc-f9YrtJM-V4vZn9NA-or5nvfQXBiEWXYAZKsrvCzZfnnUlkqOzR9qCg5jGvtX2hYmOJWfvNz9xcTdR7m00
+parent: iterator; artifact: iterator
+Puml Server ID: FSV13OGm30NHLg00uljsOu85HeaJsTzB-yjfBwCtgrfjUKXwMovWneV8-IcduiezGxmEWnXA7PsqvSDWfvk_l1qIUjes6H2teCxnWlGDOpW9wdzAUYypU_i1
+parent: callback; artifact: callback
+Puml Server ID: FSVB4S8m30N0Lg20M7UwUL4qYOciUFGXxSE9s-wp6sjjKgwF8tF6YyXnjxtdKMk5E5-MOjdu6jIrRYIStlXWsIJwRij4fhW53SGFn51TmIT9yZ-jVBHPGxy0
+parent: repository; artifact: repository
+Puml Server ID: JSV13OCm30NGLM00udktCS42eyI9xE-YRjyUUtjlLQij3qblomNCU14vF-LKNBbdYDTX44EfevEsV1ZiTFERjqD2Jzic0-8Mr3b-89SvGZ7yGuBwrvBUoypUlW00
+parent: mute-idiom; artifact: mute-idiom
+Puml Server ID: JSf13iCm20NHgxG7iDdtDjH62PKX5luarq-MtSsJvgtUHdR96AyTcEj357pLJR7dDvT4EnpYgEqmqf4NWuD-V7BfidJpCXcGy4N6wmcoX1Jj-lo2ziUQONMcZHi0
+parent: prototype; artifact: prototype
+Puml Server ID: HSV13OCm30NGLM00udktCS62eCInxE-YRj_UUdjlRLfx7fBUbmkmU14vF-Lik7BF4AzJ8OfIvw3Mys6mqyrltWw9Tkfc38XhqE3uWSmd9Zuc9AZ_bVHHB4V_0W00
+parent: step-builder; artifact: step-builder
+Puml Server ID: LOZ93SCm3C1MQGQmzUysYYqaAcJ5q96i7t_x8KXkh4soKvfypeZfNm33fnuSP-xfPEtI88tQhW4i-M2WmGzlB9sS3oqJ8yZKOQ0lWOLPzcJfAoZQtwXfeyuSyW80
+parent: double-checked-locking; artifact: double-checked-locking
+Puml Server ID: TSdH4SCW203GLTe1bFzkGv1J6qGFeLc_MI1_x-wzkv94uJ1vDVUrFm26LwxTMnonsMYgitgcEQ1BNEXeyCKVfiAxLqqBtTbqmy1z0ygCGpXHOpgv99bqTgt0JW-LmqPUCUGF

_scripts/postPumlsToServer.py

@@ -0,0 +1,67 @@
+#
+# The MIT License
+# Copyright (c) 2014 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

@@ -3,6 +3,7 @@ layout: pattern
 title: Abstract Document
 folder: abstract-document
 permalink: /patterns/abstract-document/
+pumlid: PSjB3eCm34NHhPG599vtDyQn85L-ifzX-p3lxEf8Twj3MXGDQvyJMFubChxpKN767gucSq07iinEjSNDOACVNvoAUZr6MWoe3QVE_WRnxZ0Mf38b-hkIGlurX_MyehS7
 categories: Structural
 tags: 
  - Java

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

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

abstract-document/pom.xml

@@ -29,7 +29,7 @@
     <parent>
         <artifactId>java-design-patterns</artifactId>
         <groupId>com.iluwatar</groupId>
-        <version>1.12.0</version>
+        <version>1.13.0</version>
     </parent>
     <artifactId>abstract-document</artifactId>
     <dependencies>

abstract-factory/README.md

@@ -3,8 +3,9 @@ layout: pattern
 title: Abstract Factory
 folder: abstract-factory
 permalink: /patterns/abstract-factory/
+pumlid: PSZB3OD034NHLa81Czwd6sCC39gVxEUWT1_ssLmTtQLqgR5fM7sTmFGtaV6TZu8prd0r6HtQaMKqAZLk1XjT_E6qgPUZfyc0MdTgx0-8LuUn8ErFXdr98NypXxKyezKV
 categories: Creational
-tags: 
+tags:
  - Java
  - Gang Of Four
  - Difficulty-Intermediate
@@ -30,6 +31,8 @@ Use the Abstract Factory pattern when
 ## 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
 

abstract-factory/etc/abstract-factory.urm.puml

@@ -0,0 +1,88 @@
+@startuml
+package com.iluwatar.abstractfactory {
+  class App {
+    - army : Army
+    - castle : Castle
+    - king : King
+    + App()
+    + createKingdom(factory : KingdomFactory)
+    + getArmy() : Army
+    ~ getArmy(factory : KingdomFactory) : Army
+    + getCastle() : Castle
+    ~ getCastle(factory : KingdomFactory) : Castle
+    + getKing() : King
+    ~ getKing(factory : KingdomFactory) : King
+    + main(args : String[]) {static}
+    - setArmy(army : Army)
+    - setCastle(castle : Castle)
+    - setKing(king : King)
+  }
+  class OrcKingdomFactory {
+    + OrcKingdomFactory()
+    + createArmy() : Army
+    + createCastle() : Castle
+    + createKing() : King
+  }
+  class ElfCastle {
+    ~ DESCRIPTION : String {static}
+    + ElfCastle()
+    + getDescription() : String
+  }
+  class OrcCastle {
+    ~ DESCRIPTION : String {static}
+    + OrcCastle()
+    + getDescription() : String
+  }
+  interface KingdomFactory {
+    + createArmy() : Army {abstract}
+    + createCastle() : Castle {abstract}
+    + createKing() : King {abstract}
+  }
+  class ElfKing {
+    ~ DESCRIPTION : String {static}
+    + ElfKing()
+    + getDescription() : String
+  }
+  class ElfArmy {
+    ~ DESCRIPTION : String {static}
+    + ElfArmy()
+    + getDescription() : String
+  }
+  interface Castle {
+    + getDescription() : String {abstract}
+  }
+  interface Army {
+    + getDescription() : String {abstract}
+  }
+  class OrcKing {
+    ~ DESCRIPTION : String {static}
+    + OrcKing()
+    + getDescription() : String
+  }
+  class OrcArmy {
+    ~ DESCRIPTION : String {static}
+    + OrcArmy()
+    + getDescription() : String
+  }
+  interface King {
+    + getDescription() : String {abstract}
+  }
+  class ElfKingdomFactory {
+    + ElfKingdomFactory()
+    + createArmy() : Army
+    + createCastle() : Castle
+    + createKing() : King
+  }
+}
+App -->  "-castle" Castle
+App -->  "-king" King
+App -->  "-army" Army
+OrcKingdomFactory ..|> KingdomFactory 
+ElfCastle ..|> Castle 
+OrcCastle ..|> Castle 
+ElfKing ..|> King 
+ElfArmy ..|> Army 
+OrcKing ..|> King 
+OrcArmy ..|> Army 
+ElfKingdomFactory ..|> KingdomFactory 
+@enduml

abstract-factory/pom.xml

@@ -29,7 +29,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.12.0</version>
+    <version>1.13.0</version>
   </parent>
   <artifactId>abstract-factory</artifactId>
   <dependencies>

adapter/README.md

@@ -3,6 +3,7 @@ layout: pattern
 title: Adapter
 folder: adapter
 permalink: /patterns/adapter/
+pumlid: DSR14S8m30J0Lg20M7-wEMnDOiPMFDA9j0yyUEtUkzMHJTF7xI1NF4GSLzaxZtncgDVJgCPIpobzv0N2vOKtjgRHTziMI7KBcOXl10thfxB-Nz9dMJd71m00
 categories: Structural
 tags:
  - Java
@@ -30,6 +31,10 @@ Use the Adapter pattern when
 ## Real world examples
 
 * [java.util.Arrays#asList()](http://docs.oracle.com/javase/8/docs/api/java/util/Arrays.html#asList%28T...%29)
+* [java.util.Collections#list()](https://docs.oracle.com/javase/8/docs/api/java/util/Collections.html#list-java.util.Enumeration-)
+* [java.util.Collections#enumeration()](https://docs.oracle.com/javase/8/docs/api/java/util/Collections.html#enumeration-java.util.Collection-)
+* [javax.xml.bind.annotation.adapters.XMLAdapter](http://docs.oracle.com/javase/8/docs/api/javax/xml/bind/annotation/adapters/XmlAdapter.html#marshal-BoundType-)
+
 
 ## Credits
 

adapter/etc/adapter.urm.puml

@@ -0,0 +1,35 @@
+@startuml
+package com.iluwatar.adapter {
+  interface BattleShip {
+    + fire() {abstract}
+    + move() {abstract}
+  }
+  class BattleFishingBoat {
+    - boat : FishingBoat
+    + BattleFishingBoat()
+    + fire()
+    + move()
+  }
+  class App {
+    + App()
+    + main(args : String[]) {static}
+  }
+  class Captain {
+    - battleship : BattleShip
+    + Captain()
+    + Captain(battleship : BattleShip)
+    + fire()
+    + move()
+    + setBattleship(battleship : BattleShip)
+  }
+  class FishingBoat {
+    + FishingBoat()
+    + fish()
+    + sail()
+  }
+}
+BattleFishingBoat -->  "-boat" FishingBoat
+Captain -->  "-battleship" BattleShip
+BattleFishingBoat ..|> BattleShip 
+Captain ..|> BattleShip 
+@enduml

adapter/pom.xml

@@ -29,7 +29,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.12.0</version>
+    <version>1.13.0</version>
   </parent>
   <artifactId>adapter</artifactId>
   <dependencies>

aggregator-microservices/README.md

@@ -3,6 +3,7 @@ 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>1.12.0</version>
+        <version>1.13.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

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

@@ -0,0 +1,41 @@
+@startuml
+package com.iluwatar.aggregator.microservices {
+  class ProductInventoryClientImpl {
+    + ProductInventoryClientImpl()
+    + getProductInventories() : int
+  }
+  class App {
+    + App()
+    + main(args : String[]) {static}
+  }
+  interface ProductInventoryClient {
+    + getProductInventories() : int {abstract}
+  }
+  class Product {
+    - productInventories : int
+    - title : String
+    + Product()
+    + getProductInventories() : int
+    + getTitle() : String
+    + setProductInventories(productInventories : int)
+    + setTitle(title : String)
+  }
+  class Aggregator {
+    - informationClient : ProductInformationClient
+    - inventoryClient : ProductInventoryClient
+    + Aggregator()
+    + getProduct() : Product
+  }
+  class ProductInformationClientImpl {
+    + ProductInformationClientImpl()
+    + getProductTitle() : String
+  }
+  interface ProductInformationClient {
+    + getProductTitle() : String {abstract}
+  }
+}
+Aggregator -->  "-inventoryClient" ProductInventoryClient
+Aggregator -->  "-informationClient" ProductInformationClient
+ProductInventoryClientImpl ..|> ProductInventoryClient 
+ProductInformationClientImpl ..|> ProductInformationClient 
+@enduml

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

@@ -0,0 +1,12 @@
+@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

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

aggregator-microservices/information-microservice/pom.xml

@@ -29,7 +29,7 @@
     <parent>
         <artifactId>aggregator-microservices</artifactId>
         <groupId>com.iluwatar</groupId>
-        <version>1.12.0</version>
+        <version>1.13.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

aggregator-microservices/inventory-microservice/pom.xml

@@ -29,7 +29,7 @@
     <parent>
         <artifactId>aggregator-microservices</artifactId>
         <groupId>com.iluwatar</groupId>
-        <version>1.12.0</version>
+        <version>1.13.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

aggregator-microservices/pom.xml

@@ -29,15 +29,35 @@
     <parent>
         <artifactId>java-design-patterns</artifactId>
         <groupId>com.iluwatar</groupId>
-        <version>1.12.0</version>
+        <version>1.13.0</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>
         <module>inventory-microservice</module>
     </modules>
-</project>
+</project>

api-gateway/README.md

@@ -3,6 +3,7 @@ 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>1.12.0</version>
+    <version>1.13.0</version>
   </parent>
   <modelVersion>4.0.0</modelVersion>
   <artifactId>api-gateway-service</artifactId>

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

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

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

@@ -0,0 +1,12 @@
+@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

@@ -0,0 +1,12 @@
+@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>1.12.0</version>
+    <version>1.13.0</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>

api-gateway/pom.xml

@@ -29,15 +29,35 @@
   <parent>
     <artifactId>java-design-patterns</artifactId>
     <groupId>com.iluwatar</groupId>
-    <version>1.12.0</version>
+    <version>1.13.0</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>
     <module>api-gateway-service</module>
   </modules>
-</project>
+</project>

api-gateway/price-microservice/pom.xml

@@ -29,7 +29,7 @@
   <parent>
     <artifactId>api-gateway</artifactId>
     <groupId>com.iluwatar</groupId>
-    <version>1.12.0</version>
+    <version>1.13.0</version>
   </parent>
 
   <modelVersion>4.0.0</modelVersion>

async-method-invocation/README.md

@@ -3,11 +3,13 @@ layout: pattern
 title: Async Method Invocation
 folder: async-method-invocation
 permalink: /patterns/async-method-invocation/
+pumlid: TSdB3SCW303GLTe1mFTkunWhk0A3_4dKxTi5UdlIUuhIoCPfuz4Zjhy03EzwIlGyqjbeQR16fJL1HjuOQF362qjZbrFBnWWsTPZeFm3wHwbCZhvQ4RqMOSXIuA1_LzDctJd75m00
 categories: Concurrency
 tags:
  - Java
  - Difficulty-Intermediate
  - Functional
+ - Reactive
 ---
 
 ## Intent

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

@@ -0,0 +1,50 @@
+@startuml
+package com.iluwatar.async.method.invocation {
+  class App {
+    + App()
+    - callback(name : String) : AsyncCallback<T> {static}
+    - lazyval(value : T, delayMillis : long) : Callable<T> {static}
+    - log(msg : String) {static}
+    + main(args : String[]) {static}
+  }
+  interface AsyncResult<T> {
+    + await() {abstract}
+    + getValue() : T {abstract}
+    + isCompleted() : boolean {abstract}
+  }
+  interface AsyncExecutor {
+    + endProcess(AsyncResult<T>) : T {abstract}
+    + startProcess(Callable<T>) : AsyncResult<T> {abstract}
+    + startProcess(Callable<T>, AsyncCallback<T>) : AsyncResult<T> {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>
+  }
+  interface AsyncCallback<T> {
+    + onComplete(T, Optional<Exception>) {abstract}
+  }
+  -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

@@ -29,7 +29,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.12.0</version>
+    <version>1.13.0</version>
   </parent>
   <artifactId>async-method-invocation</artifactId>
   <dependencies>

bridge/README.md

@@ -3,6 +3,7 @@ layout: pattern
 title: Bridge
 folder: bridge
 permalink: /patterns/bridge/
+pumlid: BSR14SCm20J0Lf82BFxf1akCJ4R26ZZYzkE7zxLljJgoIVfu7S2A3v7pLRhYo3r3l9u6CPHwJjAH5uETllpZhKbejsqn86v1a-CExQwj2mdgqv8-oyev_W00
 categories: Structural
 tags:
  - Java

bridge/etc/bridge.urm.puml

@@ -0,0 +1,89 @@
+@startuml
+package com.iluwatar.bridge {
+  class FlyingMagicWeapon {
+    + FlyingMagicWeapon(imp : FlyingMagicWeaponImpl)
+    + fly()
+    + getImp() : FlyingMagicWeaponImpl
+    + swing()
+    + unwield()
+    + wield()
+  }
+  class Stormbringer {
+    + Stormbringer()
+    + eatSoulImp()
+    + swingImp()
+    + unwieldImp()
+    + wieldImp()
+  }
+  abstract class FlyingMagicWeaponImpl {
+    + FlyingMagicWeaponImpl()
+    + flyImp() {abstract}
+  }
+  class SoulEatingMagicWeapon {
+    + SoulEatingMagicWeapon(imp : SoulEatingMagicWeaponImpl)
+    + eatSoul()
+    + getImp() : SoulEatingMagicWeaponImpl
+    + swing()
+    + unwield()
+    + wield()
+  }
+  abstract class MagicWeaponImpl {
+    + MagicWeaponImpl()
+    + swingImp() {abstract}
+    + unwieldImp() {abstract}
+    + wieldImp() {abstract}
+  }
+  abstract class SoulEatingMagicWeaponImpl {
+    + SoulEatingMagicWeaponImpl()
+    + eatSoulImp() {abstract}
+  }
+  class Excalibur {
+    + Excalibur()
+    + blindImp()
+    + swingImp()
+    + unwieldImp()
+    + wieldImp()
+  }
+  class Mjollnir {
+    + Mjollnir()
+    + flyImp()
+    + swingImp()
+    + unwieldImp()
+    + wieldImp()
+  }
+  class App {
+    + App()
+    + main(args : String[]) {static}
+  }
+  abstract class MagicWeapon {
+    # imp : MagicWeaponImpl
+    + MagicWeapon(imp : MagicWeaponImpl)
+    + getImp() : MagicWeaponImpl
+    + swing() {abstract}
+    + unwield() {abstract}
+    + wield() {abstract}
+  }
+  abstract class BlindingMagicWeaponImpl {
+    + BlindingMagicWeaponImpl()
+    + blindImp() {abstract}
+  }
+  class BlindingMagicWeapon {
+    + BlindingMagicWeapon(imp : BlindingMagicWeaponImpl)
+    + blind()
+    + getImp() : BlindingMagicWeaponImpl
+    + swing()
+    + unwield()
+    + wield()
+  }
+}
+MagicWeapon -->  "-imp" MagicWeaponImpl
+FlyingMagicWeapon --|> MagicWeapon 
+Stormbringer --|> SoulEatingMagicWeaponImpl 
+FlyingMagicWeaponImpl --|> MagicWeaponImpl 
+SoulEatingMagicWeapon --|> MagicWeapon 
+SoulEatingMagicWeaponImpl --|> MagicWeaponImpl 
+Excalibur --|> BlindingMagicWeaponImpl 
+Mjollnir --|> FlyingMagicWeaponImpl 
+BlindingMagicWeaponImpl --|> MagicWeaponImpl 
+BlindingMagicWeapon --|> MagicWeapon 
+@enduml

bridge/pom.xml

@@ -29,7 +29,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.12.0</version>
+    <version>1.13.0</version>
   </parent>
   <artifactId>bridge</artifactId>
   <dependencies>

builder/README.md

@@ -3,6 +3,7 @@ layout: pattern
 title: Builder
 folder: builder
 permalink: /patterns/builder/
+pumlid: DSR94O0m2030LhG0mzzkC64KXs26GzlNZw_TcRLADagJwOWOlW8OFcNdE79B9wkN1ccKUdLWoGS33KwySMdalEioC89C7Jhw5zYIfNrIrFybhPUHNLu0
 categories: Creational
 tags:
  - Java
@@ -26,6 +27,9 @@ Use the Builder pattern when
 ## Real world examples
 
 * [java.lang.StringBuilder](http://docs.oracle.com/javase/8/docs/api/java/lang/StringBuilder.html)
+* [java.nio.ByteBuffer](http://docs.oracle.com/javase/8/docs/api/java/nio/ByteBuffer.html#put-byte-) as well as similar buffers such as FloatBuffer, IntBuffer and so on.
+* [java.lang.StringBuffer](http://docs.oracle.com/javase/8/docs/api/java/lang/StringBuffer.html#append-boolean-)
+* All implementations of [java.lang.Appendable](http://docs.oracle.com/javase/8/docs/api/java/lang/Appendable.html)
 * [Apache Camel builders](https://github.com/apache/camel/tree/0e195428ee04531be27a0b659005e3aa8d159d23/camel-core/src/main/java/org/apache/camel/builder)
 
 ## Credits

builder/etc/builder.urm.puml

@@ -0,0 +1,100 @@
+@startuml
+package com.iluwatar.builder {
+  class Builder {
+    - armor : Armor
+    - hairColor : HairColor
+    - hairType : HairType
+    - name : String
+    - profession : Profession
+    - weapon : Weapon
+    + Builder(profession : Profession, name : String)
+    + build() : Hero
+    + withArmor(armor : Armor) : Builder
+    + withHairColor(hairColor : HairColor) : Builder
+    + withHairType(hairType : HairType) : Builder
+    + withWeapon(weapon : Weapon) : Builder
+  }
+  class App {
+    + App()
+    + main(args : String[]) {static}
+  }
+  class Hero {
+    - armor : Armor
+    - hairColor : HairColor
+    - hairType : HairType
+    - name : String
+    - profession : Profession
+    - weapon : Weapon
+    - Hero(builder : Builder)
+    + getArmor() : Armor
+    + getHairColor() : HairColor
+    + getHairType() : HairType
+    + getName() : String
+    + getProfession() : Profession
+    + getWeapon() : Weapon
+    + toString() : String
+  }
+  enum Weapon {
+    + AXE {static}
+    + BOW {static}
+    + DAGGER {static}
+    + SWORD {static}
+    + WARHAMMER {static}
+    + toString() : String
+    + valueOf(name : String) : Weapon {static}
+    + values() : Weapon[] {static}
+  }
+  enum HairColor {
+    + BLACK {static}
+    + BLOND {static}
+    + BROWN {static}
+    + RED {static}
+    + WHITE {static}
+    + toString() : String
+    + valueOf(name : String) : HairColor {static}
+    + values() : HairColor[] {static}
+  }
+  enum Profession {
+    + MAGE {static}
+    + PRIEST {static}
+    + THIEF {static}
+    + WARRIOR {static}
+    + toString() : String
+    + valueOf(name : String) : Profession {static}
+    + values() : Profession[] {static}
+  }
+  enum Armor {
+    + CHAIN_MAIL {static}
+    + CLOTHES {static}
+    + LEATHER {static}
+    + PLATE_MAIL {static}
+    - title : String
+    + toString() : String
+    + valueOf(name : String) : Armor {static}
+    + values() : Armor[] {static}
+  }
+  enum HairType {
+    + BALD {static}
+    + CURLY {static}
+    + LONG_CURLY {static}
+    + LONG_STRAIGHT {static}
+    + SHORT {static}
+    - title : String
+    + toString() : String
+    + valueOf(name : String) : HairType {static}
+    + values() : HairType[] {static}
+  }
+}
+Hero -->  "-profession" Profession
+Builder ..+ Hero
+Hero -->  "-armor" Armor
+App --+ Hero
+Builder -->  "-weapon" Weapon
+Builder -->  "-hairColor" HairColor
+Builder -->  "-hairType" HairType
+Hero -->  "-hairColor" HairColor
+Builder -->  "-profession" Profession
+Hero -->  "-weapon" Weapon
+Hero -->  "-hairType" HairType
+Builder -->  "-armor" Armor
+@enduml

builder/pom.xml

@@ -29,7 +29,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.12.0</version>
+    <version>1.13.0</version>
   </parent>
   <artifactId>builder</artifactId>
   <dependencies>

business-delegate/README.md

@@ -3,6 +3,7 @@ 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

@@ -0,0 +1,55 @@
+@startuml
+package com.iluwatar.business.delegate {
+  class EjbService {
+    + EjbService()
+    + doProcessing()
+  }
+  class BusinessLookup {
+    - ejbService : EjbService
+    - jmsService : JmsService
+    + BusinessLookup()
+    + getBusinessService(serviceType : ServiceType) : BusinessService
+    + setEjbService(ejbService : EjbService)
+    + setJmsService(jmsService : JmsService)
+  }
+  class App {
+    + App()
+    + main(args : String[]) {static}
+  }
+  interface BusinessService {
+    + doProcessing() {abstract}
+  }
+  class Client {
+    - businessDelegate : BusinessDelegate
+    + Client(businessDelegate : BusinessDelegate)
+    + doTask()
+  }
+  class BusinessDelegate {
+    - businessService : BusinessService
+    - lookupService : BusinessLookup
+    - serviceType : ServiceType
+    + BusinessDelegate()
+    + doTask()
+    + setLookupService(businessLookup : BusinessLookup)
+    + setServiceType(serviceType : ServiceType)
+  }
+  class JmsService {
+    + JmsService()
+    + doProcessing()
+  }
+  enum ServiceType {
+    + EJB {static}
+    + JMS {static}
+    + valueOf(name : String) : ServiceType {static}
+    + values() : ServiceType[] {static}
+  }
+}
+BusinessDelegate -->  "-serviceType" ServiceType
+BusinessLookup -->  "-ejbService" EjbService
+Client -->  "-businessDelegate" BusinessDelegate
+BusinessDelegate -->  "-businessService" BusinessService
+BusinessDelegate -->  "-lookupService" BusinessLookup
+BusinessLookup -->  "-jmsService" JmsService
+EjbService ..|> BusinessService 
+JmsService ..|> BusinessService 
+@enduml

business-delegate/pom.xml

@@ -30,7 +30,7 @@
 	<parent>
 		<groupId>com.iluwatar</groupId>
 		<artifactId>java-design-patterns</artifactId>
-		<version>1.12.0</version>
+		<version>1.13.0</version>
 	</parent>
 	<artifactId>business-delegate</artifactId>
 	<dependencies>

caching/README.md

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

caching/etc/caching.urm.puml

@@ -0,0 +1,100 @@
+@startuml
+package com.iluwatar.caching {
+  class App {
+    + App()
+    + main(args : String[]) {static}
+    + useReadAndWriteThroughStrategy()
+    + useReadThroughAndWriteAroundStrategy()
+    + useReadThroughAndWriteBehindStrategy()
+  }
+  ~class Node {
+    ~ next : Node
+    ~ previous : Node
+    ~ userAccount : UserAccount
+    ~ userId : String
+    + Node(this$0 : String, userId : UserAccount)
+  }
+  class CacheStore {
+    ~ cache : LruCache {static}
+    - CacheStore()
+    + clearCache() {static}
+    + flushCache() {static}
+    + initCapacity(capacity : int) {static}
+    + print() : String {static}
+    + readThrough(userId : String) : UserAccount {static}
+    + readThroughWithWriteBackPolicy(userId : String) : UserAccount {static}
+    + writeAround(userAccount : UserAccount) {static}
+    + writeBehind(userAccount : UserAccount) {static}
+    + writeThrough(userAccount : UserAccount) {static}
+  }
+  class AppManager {
+    - cachingPolicy : CachingPolicy {static}
+    - AppManager()
+    + find(userId : String) : UserAccount {static}
+    + initCacheCapacity(capacity : int) {static}
+    + initCachingPolicy(policy : CachingPolicy) {static}
+    + initDb(useMongoDb : boolean) {static}
+    + printCacheContent() : String {static}
+    + save(userAccount : UserAccount) {static}
+  }
+  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
+  }
+  class LruCache {
+    ~ 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 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}
+  }
+  enum CachingPolicy {
+    + AROUND {static}
+    + BEHIND {static}
+    + THROUGH {static}
+    - policy : String
+    + getPolicy() : String
+    + valueOf(name : String) : CachingPolicy {static}
+    + values() : CachingPolicy[] {static}
+  }
+}
+Node --+ LruCache
+LruCache -->  "-head" Node
+Node -->  "-previous" Node
+AppManager -->  "-cachingPolicy" CachingPolicy
+Node -->  "-userAccount" UserAccount
+CacheStore -->  "-cache" LruCache
+@enduml

caching/pom.xml

@@ -29,7 +29,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.12.0</version>
+    <version>1.13.0</version>
   </parent>
   <artifactId>caching</artifactId>
   <dependencies>

callback/README.md

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

callback/etc/callback.urm.puml

@@ -0,0 +1,25 @@
+@startuml
+package com.iluwatar.callback {
+  interface Callback {
+    + call() {abstract}
+  }
+  abstract class Task {
+    + Task()
+    + execute() {abstract}
+    + executeWith(callback : Callback)
+  }
+  class App {
+    + App()
+    + main(args : String[]) {static}
+  }
+  class SimpleTask {
+    + SimpleTask()
+    + execute()
+  }
+  class LambdasApp {
+    + LambdasApp()
+    + main(args : String[]) {static}
+  }
+}
+SimpleTask --|> Task 
+@enduml

callback/pom.xml

@@ -29,7 +29,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.12.0</version>
+    <version>1.13.0</version>
   </parent>
   <artifactId>callback</artifactId>
   <dependencies>

chain/README.md

@@ -3,6 +3,7 @@ layout: pattern
 title: Chain of responsibility
 folder: chain
 permalink: /patterns/chain/
+pumlid: 9SR13SCm20NGLTe1OkxTXX0KKzd4Wa-pVYlrdTxJN4OTMZ4U7LZv8Wg-ssdejLTgoELGHvDhaesw6HpqvWzlXwQTlYq6D3nfSlv2qjcS5F9VgvXjrHnV
 categories: Behavioral
 tags:
  - Java
@@ -28,6 +29,7 @@ Use Chain of Responsibility when
 
 * [java.util.logging.Logger#log()](http://docs.oracle.com/javase/8/docs/api/java/util/logging/Logger.html#log%28java.util.logging.Level,%20java.lang.String%29)
 * [Apache Commons Chain](https://commons.apache.org/proper/commons-chain/index.html)
+* [javax.servlet.Filter#doFilter()](http://docs.oracle.com/javaee/7/api/javax/servlet/Filter.html#doFilter-javax.servlet.ServletRequest-javax.servlet.ServletResponse-javax.servlet.FilterChain-)
 
 ## Credits
 

chain/etc/chain.urm.puml

@@ -0,0 +1,60 @@
+@startuml
+package com.iluwatar.chain {
+  class OrcSoldier {
+    + OrcSoldier(handler : RequestHandler)
+    + handleRequest(req : Request)
+    + toString() : String
+  }
+  class OrcCommander {
+    + OrcCommander(handler : RequestHandler)
+    + handleRequest(req : Request)
+    + toString() : String
+  }
+  class OrcKing {
+    ~ chain : RequestHandler
+    + OrcKing()
+    - buildChain()
+    + makeRequest(req : Request)
+  }
+  class Request {
+    - handled : boolean
+    - requestDescription : String
+    - requestType : RequestType
+    + Request(requestType : RequestType, requestDescription : String)
+    + getRequestDescription() : String
+    + getRequestType() : RequestType
+    + isHandled() : boolean
+    + markHandled()
+    + toString() : String
+  }
+  class App {
+    + App()
+    + main(args : String[]) {static}
+  }
+  abstract class RequestHandler {
+    - next : RequestHandler
+    + RequestHandler(next : RequestHandler)
+    + handleRequest(req : Request)
+    # printHandling(req : Request)
+    + toString() : String {abstract}
+  }
+  class OrcOfficer {
+    + OrcOfficer(handler : RequestHandler)
+    + handleRequest(req : Request)
+    + toString() : String
+  }
+  enum RequestType {
+    + COLLECT_TAX {static}
+    + DEFEND_CASTLE {static}
+    + TORTURE_PRISONER {static}
+    + valueOf(name : String) : RequestType {static}
+    + values() : RequestType[] {static}
+  }
+}
+RequestHandler -->  "-next" RequestHandler
+Request -->  "-requestType" RequestType
+OrcKing -->  "-chain" RequestHandler
+OrcSoldier --|> RequestHandler 
+OrcCommander --|> RequestHandler 
+OrcOfficer --|> RequestHandler 
+@enduml

chain/pom.xml

@@ -29,7 +29,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.12.0</version>
+    <version>1.13.0</version>
   </parent>
   <artifactId>chain</artifactId>
   <dependencies>

command/README.md

@@ -3,11 +3,13 @@ layout: pattern
 title: Command
 folder: command
 permalink: /patterns/command/
+pumlid: DSgn4OCm30NGLM00h3xR25i7vYpXaxx2-g59zugtTgiZcwIFvGHcV8YSdt9qdBbdYDVR88PIRwK-yc6mqyLVtff4FsoR38XRa7Aye3SgMoD1_RkaQvcfumS0
 categories: Behavioral
-tags: 
+tags:
  - Java
  - Gang Of Four
  - Difficulty-Intermediate
+ - Functional
 ---
 
 ## Also known as
@@ -39,6 +41,7 @@ Use the Command pattern when you want to
 
 * [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
 

command/etc/command.urm.puml

@@ -0,0 +1,84 @@
+@startuml
+package com.iluwatar.command {
+  class InvisibilitySpell {
+    - target : Target
+    + InvisibilitySpell()
+    + execute(target : Target)
+    + redo()
+    + toString() : String
+    + undo()
+  }
+  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
+  }
+  abstract class Target {
+    - size : Size
+    - visibility : Visibility
+    + Target()
+    + getSize() : Size
+    + getVisibility() : Visibility
+    + printStatus()
+    + setSize(size : Size)
+    + setVisibility(visibility : Visibility)
+    + toString() : String {abstract}
+  }
+  class Wizard {
+    - redoStack : Deque<Command>
+    - undoStack : Deque<Command>
+    + Wizard()
+    + castSpell(command : Command, target : Target)
+    + redoLastSpell()
+    + toString() : String
+    + undoLastSpell()
+  }
+  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}
+  }
+  enum Visibility {
+    + INVISIBLE {static}
+    + UNDEFINED {static}
+    + VISIBLE {static}
+    - title : String
+    + toString() : String
+    + valueOf(name : String) : Visibility {static}
+    + values() : Visibility[] {static}
+  }
+}
+Target -->  "-size" Size
+Wizard -->  "-undoStack" Command
+ShrinkSpell -->  "-oldSize" Size
+InvisibilitySpell -->  "-target" Target
+ShrinkSpell -->  "-target" Target
+Target -->  "-visibility" Visibility
+InvisibilitySpell --|> Command 
+Goblin --|> Target 
+ShrinkSpell --|> Command 
+@enduml

command/pom.xml

@@ -29,7 +29,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.12.0</version>
+    <version>1.13.0</version>
   </parent>
   <artifactId>command</artifactId>
   <dependencies>

composite/README.md

@@ -3,6 +3,7 @@ layout: pattern
 title: Composite
 folder: composite
 permalink: /patterns/composite/
+pumlid: HSf13eCm30NHgy01YFUzZGaM62LEP7-NwvTTT_EaMTLgoqFIst81Cpv4payv5LVk6U9r6CHGwkYaBHy6EztyvUsGqDEsoO2u1NMED-WTvmY5aA3-LT9xcTdR3m00
 categories: Structural
 tags:
  - Java

composite/etc/composite.urm.puml

@@ -0,0 +1,42 @@
+@startuml
+package com.iluwatar.composite {
+  class Word {
+    + Word(letters : List<Letter>)
+    # printThisAfter()
+    # printThisBefore()
+  }
+  class App {
+    + App()
+    + main(args : String[]) {static}
+  }
+  class Messenger {
+    + Messenger()
+    ~ messageFromElves() : LetterComposite
+    ~ messageFromOrcs() : LetterComposite
+  }
+  class Letter {
+    - c : char
+    + Letter(c : char)
+    # printThisAfter()
+    # printThisBefore()
+  }
+  class Sentence {
+    + Sentence(words : List<Word>)
+    # printThisAfter()
+    # printThisBefore()
+  }
+  abstract class LetterComposite {
+    - children : List<LetterComposite>
+    + LetterComposite()
+    + add(letter : LetterComposite)
+    + count() : int
+    + print()
+    # printThisAfter() {abstract}
+    # printThisBefore() {abstract}
+  }
+}
+LetterComposite -->  "-children" LetterComposite
+Word --|> LetterComposite 
+Letter --|> LetterComposite 
+Sentence --|> LetterComposite 
+@enduml

composite/pom.xml

@@ -29,7 +29,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.12.0</version>
+    <version>1.13.0</version>
   </parent>
   <artifactId>composite</artifactId>
   <dependencies>

dao/README.md

@@ -3,6 +3,7 @@ layout: pattern
 title: Data Access Object
 folder: dao
 permalink: /patterns/dao/
+pumlid: 5SR14OKW30N0LhG0oVrt4o6ZE12Ov4NR_thQNQlc5aN2sd82qtz4naywAixOmyNoK8WYvT6fjdWOR7JnpLiHhuTkam4nTUhiRwZm847-J64zpUZj3m00
 categories: Persistence Tier
 tags:
  - Java

dao/etc/dao.urm.puml

@@ -0,0 +1,65 @@
+@startuml
+package com.iluwatar.dao {
+  class InMemoryCustomerDao {
+    - idToCustomer : Map<Integer, Customer>
+    + InMemoryCustomerDao()
+    + add(customer : Customer) : boolean
+    + delete(customer : Customer) : boolean
+    + getAll() : Stream<Customer>
+    + getById(id : int) : Optional<Customer>
+    + update(customer : Customer) : boolean
+  }
+  interface CustomerSchemaSql {
+    + CREATE_SCHEMA_SQL : String {static}
+    + DELETE_SCHEMA_SQL : String {static}
+  }
+  interface CustomerDao {
+    + add(Customer) : boolean {abstract}
+    + delete(Customer) : boolean {abstract}
+    + getAll() : Stream<Customer> {abstract}
+    + getById(int) : Optional<Customer> {abstract}
+    + update(Customer) : boolean {abstract}
+  }
+  class App {
+    - DB_URL : String {static}
+    - log : Logger {static}
+    + App()
+    - addCustomers(customerDao : CustomerDao) {static}
+    - createDataSource() : DataSource {static}
+    - createSchema(dataSource : DataSource) {static}
+    - deleteSchema(dataSource : DataSource) {static}
+    + generateSampleCustomers() : List<Customer> {static}
+    + main(args : String[]) {static}
+    - performOperationsUsing(customerDao : CustomerDao) {static}
+  }
+  class DbCustomerDao {
+    - dataSource : DataSource
+    + DbCustomerDao(dataSource : DataSource)
+    + add(customer : Customer) : boolean
+    - createCustomer(resultSet : ResultSet) : Customer
+    + delete(customer : Customer) : boolean
+    + getAll() : Stream<Customer>
+    + getById(id : int) : Optional<Customer>
+    - getConnection() : Connection
+    - mutedClose(connection : Connection)
+    + update(customer : Customer) : boolean
+  }
+  class Customer {
+    - firstName : String
+    - id : int
+    - lastName : String
+    + Customer(id : int, firstName : String, lastName : String)
+    + equals(that : Object) : boolean
+    + getFirstName() : String
+    + getId() : int
+    + getLastName() : String
+    + hashCode() : int
+    + setFirstName(firstName : String)
+    + setId(id : int)
+    + setLastName(lastName : String)
+    + toString() : String
+  }
+}
+InMemoryCustomerDao ..|> CustomerDao 
+DbCustomerDao ..|> CustomerDao 
+@enduml

dao/pom.xml

@@ -30,7 +30,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.12.0</version>
+    <version>1.13.0</version>
   </parent>
   <artifactId>dao</artifactId>
 

data-mapper/README.md

@@ -3,6 +3,7 @@ layout: pattern
 title: Data Mapper
 folder: data-mapper
 permalink: /patterns/data-mapper/
+pumlid: JShB3OGm303HLg20nFVjnYGM1CN6ycTfVtFSsnjfzY5jPgUqkLqHwXy0mxUU8wuyqidQ8q4IjJqCO-QBWGOtVh5qyd5AKOmW4mT6Nu2-ZiAekapH_hkcSTNa-GC0
 categories: Persistence Tier
 tags:
  - Java

data-mapper/etc/data-mapper.urm.puml

@@ -0,0 +1,42 @@
+@startuml
+package com.iluwatar.datamapper {
+  interface StudentDataMapper {
+    + delete(Student) {abstract}
+    + find(int) : Optional<Student> {abstract}
+    + insert(Student) {abstract}
+    + update(Student) {abstract}
+  }
+  class App {
+    - log : Logger {static}
+    - App()
+    + main(args : String[]) {static}
+  }
+  class Student {
+    - grade : char
+    - name : String
+    - serialVersionUID : long {static}
+    - studentId : int
+    + Student(studentId : int, name : String, grade : char)
+    + equals(inputObject : Object) : boolean
+    + getGrade() : char
+    + getName() : String
+    + getStudentId() : int
+    + hashCode() : int
+    + setGrade(grade : char)
+    + setName(name : String)
+    + setStudentId(studentId : int)
+    + toString() : String
+  }
+  class StudentDataMapperImpl {
+    - students : List<Student>
+    + StudentDataMapperImpl()
+    + delete(studentToBeDeleted : Student)
+    + find(studentId : int) : Optional<Student>
+    + getStudents() : List<Student>
+    + insert(studentToBeInserted : Student)
+    + update(studentToBeUpdated : Student)
+  }
+}
+StudentDataMapperImpl -->  "-students" Student
+StudentDataMapperImpl ..|> StudentDataMapper 
+@enduml

data-mapper/pom.xml

@@ -28,7 +28,7 @@
 	<parent>
 		<groupId>com.iluwatar</groupId>
 		<artifactId>java-design-patterns</artifactId>
-		<version>1.12.0</version>
+		<version>1.13.0</version>
 	</parent>
 	<artifactId>data-mapper</artifactId>
 	<dependencies>

decorator/README.md

@@ -3,6 +3,7 @@ layout: pattern
 title: Decorator
 folder: decorator
 permalink: /patterns/decorator/
+pumlid: HSV14SCm20J0Lk82BFxf1YF6LaP26ZZizfDVVhjRC-bPDRs_Bc35cyZvAMV3bKU6kao36ehCGQtdms2d3z-yLursshuOKBUWmV43LPNfZEcaaFzA-YWhH_y2
 categories: Structural
 tags:
  - Java
@@ -27,6 +28,14 @@ Use Decorator
 * for responsibilities that can be withdrawn
 * when extension by subclassing is impractical. Sometimes a large number of independent extensions are possible and would produce an explosion of subclasses to support every combination. Or a class definition may be hidden or otherwise unavailable for subclassing
 
+## Real world examples
+ * [java.io.InputStream](http://docs.oracle.com/javase/8/docs/api/java/io/InputStream.html), [java.io.OutputStream](http://docs.oracle.com/javase/8/docs/api/java/io/OutputStream.html),
+ [java.io.Reader](http://docs.oracle.com/javase/8/docs/api/java/io/Reader.html) and [java.io.Writer](http://docs.oracle.com/javase/8/docs/api/java/io/Writer.html)
+ * [java.util.Collections#synchronizedXXX()](http://docs.oracle.com/javase/8/docs/api/java/util/Collections.html#synchronizedCollection-java.util.Collection-)
+ * [java.util.Collections#unmodifiableXXX()](http://docs.oracle.com/javase/8/docs/api/java/util/Collections.html#unmodifiableCollection-java.util.Collection-)
+ * [java.util.Collections#checkedXXX()](http://docs.oracle.com/javase/8/docs/api/java/util/Collections.html#checkedCollection-java.util.Collection-java.lang.Class-)
+
+
 ## Credits
 
 * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612)

decorator/etc/decorator.urm.puml

@@ -0,0 +1,29 @@
+@startuml
+package com.iluwatar.decorator {
+  interface Hostile {
+    + attack() {abstract}
+    + fleeBattle() {abstract}
+    + getAttackPower() : int {abstract}
+  }
+  class App {
+    + App()
+    + main(args : String[]) {static}
+  }
+  class Troll {
+    + Troll()
+    + attack()
+    + fleeBattle()
+    + getAttackPower() : int
+  }
+  class SmartHostile {
+    - decorated : Hostile
+    + SmartHostile(decorated : Hostile)
+    + attack()
+    + fleeBattle()
+    + getAttackPower() : int
+  }
+}
+SmartHostile -->  "-decorated" Hostile
+Troll ..|> Hostile 
+SmartHostile ..|> Hostile 
+@enduml

decorator/pom.xml

@@ -29,7 +29,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.12.0</version>
+    <version>1.13.0</version>
   </parent>
   <artifactId>decorator</artifactId>
   <dependencies>

delegation/README.md

@@ -3,6 +3,7 @@ layout: pattern
 title: Delegation
 folder: delegation
 permalink: /patterns/delegation/
+pumlid: JSV14GCX20NGLf82LkxfXbN69OFeu2VRVdBCxRsdUhLiac6F2rZxHHHybwwuyimjKQT37ANEGMfvCpZepHy-ccpjVYm697pJuFq3DJ7f39rEWlhNaZ7Aoc5V
 categories: Behavioral
 tags:
  - Java

delegation/etc/delegation.urm.puml

@@ -0,0 +1,36 @@
+@startuml
+package com.iluwatar.delegation.simple.printers {
+  class HpPrinter {
+    + HpPrinter()
+    + print(message : String)
+  }
+  class EpsonPrinter {
+    + EpsonPrinter()
+    + print(message : String)
+  }
+  class CanonPrinter {
+    + CanonPrinter()
+    + print(message : String)
+  }
+}
+package com.iluwatar.delegation.simple {
+  class App {
+    + MESSAGE_TO_PRINT : String {static}
+    + App()
+    + main(args : String[]) {static}
+  }
+  class PrinterController {
+    - printer : Printer
+    + PrinterController(printer : Printer)
+    + print(message : String)
+  }
+  interface Printer {
+    + print(String) {abstract}
+  }
+}
+PrinterController -->  "-printer" Printer
+HpPrinter ..|> Printer 
+PrinterController ..|> Printer 
+EpsonPrinter ..|> Printer 
+CanonPrinter ..|> Printer 
+@enduml

delegation/pom.xml

@@ -30,7 +30,7 @@
     <parent>
         <artifactId>java-design-patterns</artifactId>
         <groupId>com.iluwatar</groupId>
-        <version>1.12.0</version>
+        <version>1.13.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

dependency-injection/README.md

@@ -3,6 +3,7 @@ layout: pattern
 title: Dependency Injection
 folder: dependency-injection
 permalink: /patterns/dependency-injection/
+pumlid: RSdB3SCW303GLPe1mFTkunWhSGG6-PEesxS3zFQajubIpyPf_NL6B7y363xra3XpJsUZgS4QbUO0wVbWeC65DvR6BeUMXH5iwZ3GVu36YxMnqgU8NamXKu63_aPD6tNbw5y0
 categories: Behavioral
 tags:
  - Java

dependency-injection/etc/dependency-injection.urm.puml

@@ -0,0 +1,48 @@
+@startuml
+package com.iluwatar.dependency.injection {
+  class AdvancedWizard {
+    - tobacco : Tobacco
+    + AdvancedWizard(tobacco : Tobacco)
+    + smoke()
+  }
+  interface Wizard {
+    + smoke() {abstract}
+  }
+  class RivendellTobacco {
+    + RivendellTobacco()
+  }
+  class SimpleWizard {
+    - tobacco : OldTobyTobacco
+    + SimpleWizard()
+    + smoke()
+  }
+  class OldTobyTobacco {
+    + OldTobyTobacco()
+  }
+  class SecondBreakfastTobacco {
+    + SecondBreakfastTobacco()
+  }
+  class App {
+    + App()
+    + main(args : String[]) {static}
+  }
+  abstract class Tobacco {
+    + Tobacco()
+    + smoke(wizard : Wizard)
+  }
+  class GuiceWizard {
+    - tobacco : Tobacco
+    + GuiceWizard(tobacco : Tobacco)
+    + smoke()
+  }
+}
+SimpleWizard -->  "-tobacco" OldTobyTobacco
+AdvancedWizard -->  "-tobacco" Tobacco
+GuiceWizard -->  "-tobacco" Tobacco
+AdvancedWizard ..|> Wizard 
+RivendellTobacco --|> Tobacco 
+SimpleWizard ..|> Wizard 
+OldTobyTobacco --|> Tobacco 
+SecondBreakfastTobacco --|> Tobacco 
+GuiceWizard ..|> Wizard 
+@enduml

dependency-injection/pom.xml

@@ -29,7 +29,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.12.0</version>
+    <version>1.13.0</version>
   </parent>
   <artifactId>dependency-injection</artifactId>
   <dependencies>
@@ -43,10 +43,9 @@
       <artifactId>mockito-core</artifactId>
       <scope>test</scope>
     </dependency>
-	<dependency>
+    <dependency>
-	  <groupId>com.google.inject</groupId>
+      <groupId>com.google.inject</groupId>
-	  <artifactId>guice</artifactId>
+      <artifactId>guice</artifactId>
-	  <version>4.0</version>
+    </dependency>
-	</dependency>    
   </dependencies>
 </project>

double-checked-locking/README.md

@@ -3,6 +3,7 @@ layout: pattern
 title: Double Checked Locking
 folder: double-checked-locking
 permalink: /patterns/double-checked-locking/
+pumlid: TSdH4SCW203GLTe1bFzkGv1J6qGFeLc_MI1_x-wzkv94uJ1vDVUrFm26LwxTMnonsMYgitgcEQ1BNEXeyCKVfiAxLqqBtTbqmy1z0ygCGpXHOpgv99bqTgt0JW-LmqPUCUGF
 categories: Concurrency
 tags:
  - Java

double-checked-locking/etc/double-checked-locking.urm.puml

@@ -0,0 +1,20 @@
+@startuml
+package com.iluwatar.doublechecked.locking {
+  class App {
+    + App()
+    + main(args : String[]) {static}
+  }
+  class Inventory {
+    - inventorySize : int
+    - items : List<Item>
+    - lock : Lock
+    + Inventory(inventorySize : int)
+    + addItem(item : Item) : boolean
+    + getItems() : List<Item>
+  }
+  class Item {
+    + Item()
+  }
+}
+Inventory -->  "-items" Item
+@enduml

double-checked-locking/pom.xml

@@ -27,7 +27,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.12.0</version>
+    <version>1.13.0</version>
   </parent>
   <artifactId>double-checked-locking</artifactId>
   <dependencies>

double-dispatch/README.md

@@ -3,6 +3,7 @@ layout: pattern
 title: Double Dispatch
 folder: double-dispatch
 permalink: /patterns/double-dispatch/
+pumlid: NSbB3iCW303HgpG70Ezx6yTOWSeOv4zp_MRTtUZDCPGa6wV9gqTiVmCOtlKQqVDCPwEbmHgLreGXUMEWmGU_M1hxkBHiZ61JXud-1BILft1fmvz37JZetshQh3kd_000
 categories: Other
 tags:
  - Java

double-dispatch/etc/double-dispatch.urm.puml

@@ -0,0 +1,65 @@
+@startuml
+package com.iluwatar.doubledispatch {
+  abstract class GameObject {
+    - damaged : boolean
+    - onFire : boolean
+    + GameObject(left : int, top : int, right : int, bottom : int)
+    + collision(GameObject) {abstract}
+    + collisionResolve(FlamingAsteroid) {abstract}
+    + collisionResolve(Meteoroid) {abstract}
+    + collisionResolve(SpaceStationIss) {abstract}
+    + collisionResolve(SpaceStationMir) {abstract}
+    + isDamaged() : boolean
+    + isOnFire() : boolean
+    + setDamaged(damaged : boolean)
+    + setOnFire(onFire : boolean)
+    + toString() : String
+  }
+  class SpaceStationIss {
+    + SpaceStationIss(left : int, top : int, right : int, bottom : int)
+    + collision(gameObject : GameObject)
+  }
+  class FlamingAsteroid {
+    + FlamingAsteroid(left : int, top : int, right : int, bottom : int)
+    + collision(gameObject : GameObject)
+  }
+  class SpaceStationMir {
+    + SpaceStationMir(left : int, top : int, right : int, bottom : int)
+    + collision(gameObject : GameObject)
+    + collisionResolve(asteroid : FlamingAsteroid)
+    + collisionResolve(iss : SpaceStationIss)
+    + collisionResolve(meteoroid : Meteoroid)
+    + collisionResolve(mir : SpaceStationMir)
+  }
+  class Meteoroid {
+    + Meteoroid(left : int, top : int, right : int, bottom : int)
+    + collision(gameObject : GameObject)
+    + collisionResolve(asteroid : FlamingAsteroid)
+    + collisionResolve(iss : SpaceStationIss)
+    + collisionResolve(meteoroid : Meteoroid)
+    + collisionResolve(mir : SpaceStationMir)
+  }
+  class Rectangle {
+    - bottom : int
+    - left : int
+    - right : int
+    - top : int
+    + Rectangle(left : int, top : int, right : int, bottom : int)
+    + getBottom() : int
+    + getLeft() : int
+    + getRight() : int
+    + getTop() : int
+    ~ intersectsWith(r : Rectangle) : boolean
+    + toString() : String
+  }
+  class App {
+    + App()
+    + main(args : String[]) {static}
+  }
+}
+GameObject --|> Rectangle 
+SpaceStationIss --|> SpaceStationMir 
+FlamingAsteroid --|> Meteoroid 
+SpaceStationMir --|> GameObject 
+Meteoroid --|> GameObject 
+@enduml

double-dispatch/pom.xml

@@ -29,7 +29,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.12.0</version>
+    <version>1.13.0</version>
   </parent>
   <artifactId>double-dispatch</artifactId>
   <dependencies>

event-aggregator/README.md

@@ -3,10 +3,12 @@ layout: pattern
 title: Event Aggregator
 folder: event-aggregator
 permalink: /patterns/event-aggregator/
+pumlid: PSf13iCW30NHgxG70Ezx6uTOX0eCih-JwvTzTwEdUJSjFKu9wwyBMFuXCdvoRRZY21ShKo6ANEQWrkDXiD6NRqwdUAkQ5WDYwZJOTv3SUqzSgqbbp0qeVvZ3Hbun-Wy0
 categories: Structural
 tags:
  - Java
  - Difficulty-Beginner
+ - Reactive
 ---
 
 ## Intent

event-aggregator/etc/event-aggregator.urm.puml

@@ -0,0 +1,73 @@
+@startuml
+package com.iluwatar.event.aggregator {
+  class LordVarys {
+    + LordVarys()
+    + LordVarys(obs : EventObserver)
+    + timePasses(day : Weekday)
+  }
+  abstract class EventEmitter {
+    - observers : List<EventObserver>
+    + EventEmitter()
+    + EventEmitter(obs : EventObserver)
+    # notifyObservers(e : Event)
+    + registerObserver(obs : EventObserver)
+    + timePasses(Weekday) {abstract}
+  }
+  class KingJoffrey {
+    + KingJoffrey()
+    + onEvent(e : Event)
+  }
+  class LordBaelish {
+    + LordBaelish()
+    + LordBaelish(obs : EventObserver)
+    + timePasses(day : Weekday)
+  }
+  interface EventObserver {
+    + onEvent(Event) {abstract}
+  }
+  class KingsHand {
+    + KingsHand()
+    + KingsHand(obs : EventObserver)
+    + onEvent(e : Event)
+    + timePasses(day : Weekday)
+  }
+  class Scout {
+    + Scout()
+    + Scout(obs : EventObserver)
+    + timePasses(day : Weekday)
+  }
+  class App {
+    + App()
+    + main(args : String[]) {static}
+  }
+  enum Weekday {
+    + FRIDAY {static}
+    + MONDAY {static}
+    + SATURDAY {static}
+    + SUNDAY {static}
+    + THURSDAY {static}
+    + TUESDAY {static}
+    + WEDNESDAY {static}
+    - description : String
+    + toString() : String
+    + valueOf(name : String) : Weekday {static}
+    + values() : Weekday[] {static}
+  }
+  enum Event {
+    + STARK_SIGHTED {static}
+    + TRAITOR_DETECTED {static}
+    + WARSHIPS_APPROACHING {static}
+    - description : String
+    + toString() : String
+    + valueOf(name : String) : Event {static}
+    + values() : Event[] {static}
+  }
+}
+EventEmitter -->  "-observers" EventObserver
+LordVarys --|> EventEmitter 
+KingJoffrey ..|> EventObserver 
+LordBaelish --|> EventEmitter 
+KingsHand ..|> EventObserver 
+KingsHand --|> EventEmitter 
+Scout --|> EventEmitter 
+@enduml

event-aggregator/pom.xml

@@ -28,7 +28,7 @@
 	<parent>
 		<groupId>com.iluwatar</groupId>
 		<artifactId>java-design-patterns</artifactId>
-		<version>1.12.0</version>
+		<version>1.13.0</version>
 	</parent>
 	<artifactId>event-aggregator</artifactId>
 	<dependencies>

event-driven-architecture/README.md

@@ -1,7 +1,15 @@
+---
 layout: pattern
 title: Event Driven Architecture
 folder: event-driven-architecture
-permalink: /patterns/event-driven-architecture
+permalink: /patterns/event-driven-architecture/
+pumlid: TOhH3SCW30LNQGS0_tSRnrZ15H1adfFromBzkfFktZQaHT7mzgh0N1yYvoUVXXf7B7Mv1dGWozN9MZmCTlhopQdeidEaoO3wMDHvRI6zzvwAssPYbsfGGRYIGlxN7DxpZDv-
+categories: Architectural
+tags:
+ - Java
+ - Difficulty-Intermediate
+ - Reactive
+---
 
 ## Intent
 Send and notify state changes of your objects to other applications using an Event-driven Architecture.

event-driven-architecture/etc/event-driven-architecture.urm.puml

@@ -0,0 +1,62 @@
+@startuml
+package com.iluwatar.eda.handler {
+  class UserCreatedEventHandler {
+    + UserCreatedEventHandler()
+    + onEvent(event : UserCreatedEvent)
+  }
+  class UserUpdatedEventHandler {
+    + UserUpdatedEventHandler()
+    + onEvent(event : UserUpdatedEvent)
+  }
+}
+package com.iluwatar.eda.event {
+  abstract class AbstractEvent {
+    + AbstractEvent()
+    + getType() : Class<? extends Event>
+  }
+  class UserCreatedEvent {
+    - user : User
+    + UserCreatedEvent(user : User)
+    + getUser() : User
+  }
+  class UserUpdatedEvent {
+    - user : User
+    + UserUpdatedEvent(user : User)
+    + getUser() : User
+  }
+}
+package com.iluwatar.eda.framework {
+  interface Handler<E extends Event> {
+    + onEvent(E extends Event) {abstract}
+  }
+  class EventDispatcher {
+    - handlers : Map<Class<? extends Event>, Handler<? extends Event>>
+    + EventDispatcher()
+    + dispatch(event : E extends Event)
+    + registerHandler(eventType : Class<E extends Event>, handler : Handler<E extends Event>)
+  }
+  interface Event {
+    + getType() : Class<? extends Event> {abstract}
+  }
+}
+package com.iluwatar.eda.model {
+  class User {
+    - username : String
+    + User(username : String)
+    + getUsername() : String
+  }
+}
+package com.iluwatar.eda {
+  class App {
+    + App()
+    + main(args : String[]) {static}
+  }
+}
+UserUpdatedEvent -->  "-user" User
+UserCreatedEvent -->  "-user" User
+AbstractEvent ..|> Event 
+UserCreatedEvent --|> AbstractEvent 
+UserCreatedEventHandler ..|> Handler 
+UserUpdatedEvent --|> AbstractEvent 
+UserUpdatedEventHandler ..|> Handler 
+@enduml

event-driven-architecture/pom.xml

@@ -31,7 +31,7 @@
     <parent>
         <groupId>com.iluwatar</groupId>
         <artifactId>java-design-patterns</artifactId>
-        <version>1.12.0</version>
+        <version>1.13.0</version>
     </parent>
 
     <artifactId>event-driven-architecture</artifactId>

execute-around/README.md

@@ -3,6 +3,7 @@ layout: pattern
 title: Execute Around
 folder: execute-around
 permalink: /patterns/execute-around/
+pumlid: NSZ14G8n20NGLhI0XBlT865suoGa0n_NylNixSsxTvEHJTF7xGHsF8YShtfqdFdCK9TbK4ELDQcFl1ZizE8tbwRH3okR0NKBcXm_a7vK4bhOLreZXVnLJPzrvnnV
 categories: Other
 tags:
  - Java

execute-around/etc/execute-around.urm.puml

@@ -0,0 +1,14 @@
+@startuml
+package com.iluwatar.execute.around {
+  class SimpleFileWriter {
+    + SimpleFileWriter(filename : String, action : FileWriterAction)
+  }
+  class App {
+    + App()
+    + main(args : String[]) {static}
+  }
+  interface FileWriterAction {
+    + writeFile(FileWriter) {abstract}
+  }
+}
+@enduml

execute-around/pom.xml

@@ -29,7 +29,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.12.0</version>
+    <version>1.13.0</version>
   </parent>
   <artifactId>execute-around</artifactId>
   <dependencies>

facade/README.md

@@ -3,6 +3,7 @@ layout: pattern
 title: Facade
 folder: facade
 permalink: /patterns/facade/
+pumlid: BSP15eCm20N0gxG7CEoz3ILKqvTW7dpq-hhehERTJ7fMJU-l7PYn4ZbVPMlOyvEXBeT13KMEGQtdnM2d7v-yL8sssJ8PKBUWmV64lYnSbHJoRqaVPUReDm00
 categories: Structural
 tags:
  - Java

facade/etc/facade.urm.puml

@@ -0,0 +1,57 @@
+@startuml
+package com.iluwatar.facade {
+  class DwarvenGoldDigger {
+    + DwarvenGoldDigger()
+    + name() : String
+    + work()
+  }
+  class DwarvenGoldmineFacade {
+    - workers : List<DwarvenMineWorker>
+    + DwarvenGoldmineFacade()
+    + digOutGold()
+    + endDay()
+    - makeActions(workers : Collection<DwarvenMineWorker>, actions : Action[]) {static}
+    + startNewDay()
+  }
+  class DwarvenTunnelDigger {
+    + DwarvenTunnelDigger()
+    + name() : String
+    + work()
+  }
+  abstract class DwarvenMineWorker {
+    + DwarvenMineWorker()
+    - action(action : Action)
+    + action(actions : Action[])
+    + goHome()
+    + goToMine()
+    + goToSleep()
+    + name() : String {abstract}
+    + wakeUp()
+    + work() {abstract}
+  }
+  class App {
+    + App()
+    + main(args : String[]) {static}
+  }
+  class DwarvenCartOperator {
+    + DwarvenCartOperator()
+    + name() : String
+    + work()
+  }
+  ~enum Action {
+    + GO_HOME {static}
+    + GO_TO_MINE {static}
+    + GO_TO_SLEEP {static}
+    + WAKE_UP {static}
+    + WORK {static}
+    + valueOf(name : String) : Action {static}
+    + values() : Action[] {static}
+  }
+}
+DwarvenGoldmineFacade --+ DwarvenMineWorker
+DwarvenGoldmineFacade -->  "-workers" DwarvenMineWorker
+Action ..+ DwarvenMineWorker
+DwarvenGoldDigger --|> DwarvenMineWorker 
+DwarvenTunnelDigger --|> DwarvenMineWorker 
+DwarvenCartOperator --|> DwarvenMineWorker 
+@enduml

facade/pom.xml

@@ -29,7 +29,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.12.0</version>
+    <version>1.13.0</version>
   </parent>
   <artifactId>facade</artifactId>
   <dependencies>

factory-kit/README.md

@@ -3,6 +3,7 @@ layout: pattern
 title: Factory Kit
 folder: factory-kit
 permalink: /patterns/factory-kit/
+pumlid: JST15i8m20N0g-W14lRU1YcsQ4BooCS-RwzBTpDNSscvQKQx7C1SDwBWi-w68--vD6Gur55bTBAM9uE3dlpcikcotSjaGCCNTLu_q8C58pxbPI25_Bzcz3gpjoy0
 categories: Creational
 tags:
  - Java

factory-kit/etc/factory-kit.urm.puml

@@ -0,0 +1,45 @@
+@startuml
+package com.iluwatar.factorykit {
+  class Spear {
+    + Spear()
+    + toString() : String
+  }
+  class App {
+    + App()
+    + main(args : String[]) {static}
+  }
+  interface Weapon {
+  }
+  interface WeaponFactory {
+    + create(WeaponType) : Weapon {abstract}
+    + factory(consumer : Consumer<Builder>) : WeaponFactory {static}
+  }
+  class Axe {
+    + Axe()
+    + toString() : String
+  }
+  class Sword {
+    + Sword()
+    + toString() : String
+  }
+  class Bow {
+    + Bow()
+    + toString() : String
+  }
+  interface Builder {
+    + add(WeaponType, Supplier<Weapon>) {abstract}
+  }
+  enum WeaponType {
+    + AXE {static}
+    + BOW {static}
+    + SPEAR {static}
+    + SWORD {static}
+    + valueOf(name : String) : WeaponType {static}
+    + values() : WeaponType[] {static}
+  }
+}
+Spear ..|> Weapon 
+Axe ..|> Weapon 
+Sword ..|> Weapon 
+Bow ..|> Weapon 
+@enduml

factory-kit/pom.xml

@@ -30,7 +30,7 @@
     <parent>
         <groupId>com.iluwatar</groupId>
         <artifactId>java-design-patterns</artifactId>
-        <version>1.12.0</version>
+        <version>1.13.0</version>
     </parent>
     <artifactId>factory-kit</artifactId>
     <dependencies>

factory-method/README.md

@@ -3,8 +3,9 @@ layout: pattern
 title: Factory Method
 folder: factory-method
 permalink: /patterns/factory-method/
+pumlid: NSZB3G8n30N0Lg20n7UwCOxPP9MVx6TMT0zdRgEvjoazYeRrMmMsFuYChtmqr7Y6gycQq8aiQr3hSJ7OwEGtfwBUZfas0shJQR3_G2yMBFkaeQYha4B-AeUDl6FqBm00
 categories: Creational
-tags: 
+tags:
  - Java
  - Difficulty-Beginner
  - Gang Of Four
@@ -27,6 +28,16 @@ Use the Factory Method pattern when
 * a class wants its subclasses to specify the objects it creates
 * classes delegate responsibility to one of several helper subclasses, and you want to localize the knowledge of which helper subclass is the delegate
 
+## Known uses
+
+* [java.util.Calendar](http://docs.oracle.com/javase/8/docs/api/java/util/Calendar.html#getInstance--)
+* [java.util.ResourceBundle](http://docs.oracle.com/javase/8/docs/api/java/util/ResourceBundle.html#getBundle-java.lang.String-)
+* [java.text.NumberFormat](http://docs.oracle.com/javase/8/docs/api/java/text/NumberFormat.html#getInstance--)
+* [java.nio.charset.Charset](http://docs.oracle.com/javase/8/docs/api/java/nio/charset/Charset.html#forName-java.lang.String-)
+* [java.net.URLStreamHandlerFactory](http://docs.oracle.com/javase/8/docs/api/java/net/URLStreamHandlerFactory.html#createURLStreamHandler-java.lang.String-)
+* [java.util.EnumSet](https://docs.oracle.com/javase/8/docs/api/java/util/EnumSet.html#of-E-)
+* [javax.xml.bind.JAXBContext](https://docs.oracle.com/javase/8/docs/api/javax/xml/bind/JAXBContext.html#createMarshaller--)
+
 ## Credits
 
 * [Design Patterns: Elements of Reusable Object-Oriented Software](http://www.amazon.com/Design-Patterns-Elements-Reusable-Object-Oriented/dp/0201633612)

factory-method/etc/factory-method.urm.puml

@@ -0,0 +1,53 @@
+@startuml
+package com.iluwatar.factory.method {
+  class OrcBlacksmith {
+    + OrcBlacksmith()
+    + manufactureWeapon(weaponType : WeaponType) : Weapon
+  }
+  class ElfBlacksmith {
+    + ElfBlacksmith()
+    + manufactureWeapon(weaponType : WeaponType) : Weapon
+  }
+  class OrcWeapon {
+    - weaponType : WeaponType
+    + OrcWeapon(weaponType : WeaponType)
+    + getWeaponType() : WeaponType
+    + toString() : String
+  }
+  interface Blacksmith {
+    + manufactureWeapon(WeaponType) : Weapon {abstract}
+  }
+  class ElfWeapon {
+    - weaponType : WeaponType
+    + ElfWeapon(weaponType : WeaponType)
+    + getWeaponType() : WeaponType
+    + toString() : String
+  }
+  class App {
+    - blacksmith : Blacksmith
+    + App(blacksmith : Blacksmith)
+    + main(args : String[]) {static}
+    - manufactureWeapons()
+  }
+  interface Weapon {
+    + getWeaponType() : WeaponType {abstract}
+  }
+  enum WeaponType {
+    + AXE {static}
+    + SHORT_SWORD {static}
+    + SPEAR {static}
+    + UNDEFINED {static}
+    - title : String
+    + toString() : String
+    + valueOf(name : String) : WeaponType {static}
+    + values() : WeaponType[] {static}
+  }
+}
+ElfWeapon -->  "-weaponType" WeaponType
+OrcWeapon -->  "-weaponType" WeaponType
+App -->  "-blacksmith" Blacksmith
+OrcBlacksmith ..|> Blacksmith 
+ElfBlacksmith ..|> Blacksmith 
+OrcWeapon ..|> Weapon 
+ElfWeapon ..|> Weapon 
+@enduml

factory-method/pom.xml

@@ -29,7 +29,7 @@
   <parent>
     <groupId>com.iluwatar</groupId>
     <artifactId>java-design-patterns</artifactId>
-    <version>1.12.0</version>
+    <version>1.13.0</version>
   </parent>
   <artifactId>factory-method</artifactId>
   <dependencies>

faq.md

@@ -3,7 +3,7 @@ layout: page
 title: FAQ
 permalink: /faq/
 icon: fa-question
-page-index: 1
+page-index: 5
 ---
 
 ### Q1: What is the difference between State and Strategy patterns? {#Q1}
@@ -65,3 +65,11 @@ Flyweight.
 ### Q7: What are the differences between FluentInterface and Builder patterns? {#Q7}
 
 Fluent interfaces are sometimes confused with the Builder pattern, because they share method chaining and a fluent usage. However, fluent interfaces are not primarily used to create shared (mutable) objects, but to configure complex objects without having to respecify the target object on every property change. 
+
+### Q8: What is the difference between java.io.Serialization and Memento pattern? {#Q8}
+
+Memento is typically used to implement rollback/save-point support. Example we might want to mark the state of an object at a point in time, do some work and then decide to rollback to the previous state. 
+
+On the other hand serialization may be used as a tool to save the state of an object into byte[] and preserving the contents in memory or disk. When someone invokes the memento to revert object's previous state then we can deserialize the information stored and recreate previous state. 
+
+So Memento is a pattern and serialization is a tool that can be used to implement this pattern. Other ways to implement the pattern can be to clone the contents of the object and keep track of those clones.

feature-toggle/README.md

@@ -3,6 +3,7 @@ layout: pattern
 title: Feature Toggle
 folder: feature-toggle
 permalink: /patterns/feature-toggle/
+pumlid: NSZ14G8X30NGLhG0oDrk8XjPd12OvCTjNy_UthpxiAPvIBhUJc37WyZvgdtWp6U6U5i6CTIs9WtDYy5ER_vmEIH6jx8P4BUWoV43lOIHBWMhTnKIjB-gwRFkdFe5
 categories: Behavioral
 tags:
  - Java

feature-toggle/etc/feature-toggle.urm.puml

@@ -0,0 +1,47 @@
+@startuml
+package com.iluwatar.featuretoggle.pattern {
+  interface Service {
+    + getWelcomeMessage(User) : String {abstract}
+    + isEnhanced() : boolean {abstract}
+  }
+}
+package com.iluwatar.featuretoggle.user {
+  class User {
+    - name : String
+    + User(name : String)
+    + toString() : String
+  }
+  class UserGroup {
+    - freeGroup : List<User> {static}
+    - paidGroup : List<User> {static}
+    + UserGroup()
+    + addUserToFreeGroup(user : User) {static}
+    + addUserToPaidGroup(user : User) {static}
+    + isPaid(user : User) : boolean {static}
+  }
+}
+package com.iluwatar.featuretoggle.pattern.tieredversion {
+  class TieredFeatureToggleVersion {
+    + TieredFeatureToggleVersion()
+    + getWelcomeMessage(user : User) : String
+    + isEnhanced() : boolean
+  }
+}
+package com.iluwatar.featuretoggle.pattern.propertiesversion {
+  class PropertiesFeatureToggleVersion {
+    - isEnhanced : boolean
+    + PropertiesFeatureToggleVersion(properties : Properties)
+    + getWelcomeMessage(user : User) : String
+    + isEnhanced() : boolean
+  }
+}
+package com.iluwatar.featuretoggle {
+  class App {
+    + App()
+    + main(args : String[]) {static}
+  }
+}
+UserGroup -->  "-freeGroup" User
+PropertiesFeatureToggleVersion ..|> Service 
+TieredFeatureToggleVersion ..|> Service 
+@enduml

feature-toggle/pom.xml

@@ -30,7 +30,7 @@
     <parent>
         <artifactId>java-design-patterns</artifactId>
         <groupId>com.iluwatar</groupId>
-        <version>1.12.0</version>
+        <version>1.13.0</version>
     </parent>
     <modelVersion>4.0.0</modelVersion>
 

fluentinterface/README.md

@@ -3,6 +3,7 @@ layout: pattern
 title: Fluent Interface
 folder: fluentinterface
 permalink: /patterns/fluentinterface/
+pumlid: NOj93eCm302_KXv0VEzlN6F0bMCYB_3zvjpRQ3IpY97MnkNwEZD7l04SdtP8dlMfOAVBaYqRNHr4wy54Xo_Uk6uSSjWwC9FT0Zh61DYrPY_pyXs9WPF-NIllRLJN7m00
 categories: Other
 tags: 
  - Java