#352- Unit Of Work : added the launching point of the module

unit-of-work/src/main/java/com/iluwatar/unitofwork/Student.java

@@ -43,4 +43,15 @@ public class Student {
     this.address = address;
   }
 
+  public String getName() {
+    return name;
+  }
+
+  public Integer getId() {
+    return id;
+  }
+
+  public String getAddress() {
+    return address;
+  }
 }

unit-of-work/src/main/java/com/iluwatar/unitofwork/StudentManagementApp.java

@@ -0,0 +1,52 @@
+/*
+ * The MIT License (MIT)
+ *
+ * Copyright (c) 2017 Piyush Chaudhari
+ *
+ * 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.
+ */
+
+package com.iluwatar.unitofwork;
+
+import java.util.HashMap;
+import java.util.List;
+
+/**
+ * {@link StudentManagementApp} Application for managing student data.
+ */
+public class StudentManagementApp {
+  /**
+   *
+   * @param args no argument sent
+   */
+  public static void main(String[] args) {
+    Student ram = new Student(1, "Ram", "Street 9, Cupertino");
+    Student shyam = new Student(2, "Shyam", "Z bridge, Pune");
+    Student gopi = new Student(3, "Gopi", "Street 10, Mumbai");
+
+    HashMap<String, List<Student>> context = new HashMap<>();
+    StudentDatabase studentDatabase = new StudentDatabase();
+    StudentRepository studentRepository = new StudentRepository(context, studentDatabase);
+
+    studentRepository.registerNew(ram);
+    studentRepository.registerModified(shyam);
+    studentRepository.registerDeleted(gopi);
+    studentRepository.commit();
+  }
+}

unit-of-work/src/main/java/com/iluwatar/unitofwork/StudentRepository.java

@@ -24,6 +24,9 @@
 
 package com.iluwatar.unitofwork;
 
+import org.slf4j.Logger;
+import org.slf4j.LoggerFactory;
+
 import java.util.ArrayList;
 import java.util.List;
 import java.util.Map;
@@ -33,6 +36,8 @@ import java.util.Map;
  * supports unit of work for student data.
  */
 public class StudentRepository implements IUnitOfWork<Student> {
+  private static final Logger LOGGER = LoggerFactory.getLogger(StudentRepository.class);
+
   private Map<String, List<Student>> context;
   private StudentDatabase studentDatabase;
 
@@ -47,17 +52,20 @@ public class StudentRepository implements IUnitOfWork<Student> {
 
   @Override
   public void registerNew(Student student) {
+    LOGGER.info("Registering {} for insert in context.", student.getName());
     register(student, IUnitOfWork.INSERT);
   }
 
   @Override
   public void registerModified(Student student) {
+    LOGGER.info("Registering {} for modify in context.", student.getName());
     register(student, IUnitOfWork.MODIFY);
 
   }
 
   @Override
   public void registerDeleted(Student student) {
+    LOGGER.info("Registering {} for delete in context.", student.getName());
     register(student, IUnitOfWork.DELETE);
   }
 
@@ -75,6 +83,7 @@ public class StudentRepository implements IUnitOfWork<Student> {
     if (context == null || context.size() == 0) {
       return;
     }
+    LOGGER.info("Commit started");
     if (context.containsKey(IUnitOfWork.INSERT)) {
       commitInsert();
     }
@@ -85,26 +94,30 @@ public class StudentRepository implements IUnitOfWork<Student> {
     if (context.containsKey(IUnitOfWork.DELETE)) {
       commitDelete();
     }
+    LOGGER.info("Commit finished.");
   }
 
-  private void commitDelete() {
+  private void commitInsert() {
-    List<Student> deletedStudents = context.get(IUnitOfWork.DELETE);
+    List<Student> studentsToBeInserted = context.get(IUnitOfWork.INSERT);
-    for (Student student : deletedStudents) {
+    for (Student student : studentsToBeInserted) {
-      studentDatabase.delete(student);
+      LOGGER.info("Saving {} to database.", student.getName());
+      studentDatabase.insert(student);
     }
   }
 
   private void commitModify() {
     List<Student> modifiedStudents = context.get(IUnitOfWork.MODIFY);
     for (Student student : modifiedStudents) {
+      LOGGER.info("Modifying {} to database.", student.getName());
       studentDatabase.modify(student);
     }
   }
 
-  private void commitInsert() {
+  private void commitDelete() {
-    List<Student> studentsToBeInserted = context.get(IUnitOfWork.INSERT);
+    List<Student> deletedStudents = context.get(IUnitOfWork.DELETE);
-    for (Student student : studentsToBeInserted) {
+    for (Student student : deletedStudents) {
-      studentDatabase.insert(student);
+      LOGGER.info("Deleting {} to database.", student.getName());
+      studentDatabase.delete(student);
     }
   }
 }