Java 11 migrate remaining p (#1122)

* Moves partial-response to Java 11

* Moves pipeline to Java 11

* Moves poison-pill to Java 11

* Moves priority-queue to Java 11

* Moves private-class-data to Java 11

* Moves producer-consumer to Java 11

* Moves promise to Java 11

* Moves property to Java 11

* Moves prototype to Java 11

* Moves proxy to Java 11

* Corrects checkstyle errors

* Fixes build for pipeline pattern

priority-queue/src/main/java/com/iluwatar/priority/queue/Application.java

@@ -37,22 +37,22 @@ public class Application {
    */
   public static void main(String[] args) throws Exception {
 
-    QueueManager queueManager = new QueueManager(100);
+    var queueManager = new QueueManager(100);
 
     // push some message to queue
     // Low Priority message
-    for (int i = 0; i < 100; i++) {
+    for (var i = 0; i < 100; i++) {
       queueManager.publishMessage(new Message("Low Message Priority", 0));
     }
 
     // High Priority message
-    for (int i = 0; i < 100; i++) {
+    for (var i = 0; i < 100; i++) {
       queueManager.publishMessage(new Message("High Message Priority", 1));
     }
 
 
     // run worker
-    Worker worker = new Worker(queueManager);
+    var worker = new Worker(queueManager);
     worker.run();
 
 

priority-queue/src/main/java/com/iluwatar/priority/queue/PriorityMessageQueue.java

@@ -57,7 +57,7 @@ public class PriorityMessageQueue<T extends Comparable> {
       return null;
     }
 
-    final T root = queue[0];
+    final var root = queue[0];
     queue[0] = queue[size - 1];
     size--;
     maxHeapifyDown();
@@ -83,10 +83,10 @@ public class PriorityMessageQueue<T extends Comparable> {
 
 
   private void maxHeapifyDown() {
-    int index = 0;
+    var index = 0;
     while (hasLeftChild(index)) {
 
-      int smallerIndex = leftChildIndex(index);
+      var smallerIndex = leftChildIndex(index);
 
       if (hasRightChild(index) && right(index).compareTo(left(index)) > 0) {
         smallerIndex = rightChildIndex(index);
@@ -106,7 +106,7 @@ public class PriorityMessageQueue<T extends Comparable> {
   }
 
   private void maxHeapifyUp() {
-    int index = size - 1;
+    var index = size - 1;
     while (hasParent(index) && parent(index).compareTo(queue[index]) < 0) {
       swap(parentIndex(index), index);
       index = parentIndex(index);
@@ -154,7 +154,7 @@ public class PriorityMessageQueue<T extends Comparable> {
   }
 
   private void swap(int fpos, int tpos) {
-    T tmp = queue[fpos];
+    var tmp = queue[fpos];
     queue[fpos] = queue[tpos];
     queue[tpos] = tmp;
   }
@@ -170,7 +170,7 @@ public class PriorityMessageQueue<T extends Comparable> {
    * For debug .. print current state of queue
    */
   public void print() {
-    for (int i = 0; i <= size / 2; i++) {
+    for (var i = 0; i <= size / 2; i++) {
       LOGGER.info(" PARENT : " + queue[i] + " LEFT CHILD : "
           + left(i) + " RIGHT CHILD :" + right(i));
     }

priority-queue/src/main/java/com/iluwatar/priority/queue/QueueManager.java

@@ -33,7 +33,7 @@ public class QueueManager {
   private final PriorityMessageQueue<Message> messagePriorityMessageQueue;
 
   public QueueManager(int initialCapacity) {
-    messagePriorityMessageQueue = new PriorityMessageQueue<Message>(new Message[initialCapacity]);
+    messagePriorityMessageQueue = new PriorityMessageQueue<>(new Message[initialCapacity]);
   }
 
   /**

priority-queue/src/main/java/com/iluwatar/priority/queue/Worker.java

@@ -45,7 +45,7 @@ public class Worker {
   @SuppressWarnings("squid:S2189")
   public void run() throws Exception {
     while (true) {
-      Message message = queueManager.receiveMessage();
+      var message = queueManager.receiveMessage();
       if (message == null) {
         LOGGER.info("No Message ... waiting");
         Thread.sleep(200);

priority-queue/src/test/java/com/iluwatar/priority/queue/PriorityMessageQueueTest.java

@@ -23,11 +23,11 @@
 
 package com.iluwatar.priority.queue;
 
-import org.junit.jupiter.api.Test;
-
 import static org.junit.jupiter.api.Assertions.assertEquals;
 import static org.junit.jupiter.api.Assertions.assertTrue;
 
+import org.junit.jupiter.api.Test;
+
 /**
  * Test case for order of messages
  */
@@ -36,25 +36,25 @@ public class PriorityMessageQueueTest {
 
   @Test
   public void remove() {
-    PriorityMessageQueue<String> stringPriorityMessageQueue = new PriorityMessageQueue<>(new String[2]);
-    String pushMessage = "test";
+    var stringPriorityMessageQueue = new PriorityMessageQueue<>(new String[2]);
+    var pushMessage = "test";
     stringPriorityMessageQueue.add(pushMessage);
     assertEquals(stringPriorityMessageQueue.remove(), pushMessage);
   }
 
   @Test
   public void add() {
-    PriorityMessageQueue<Integer> stringPriorityMessageQueue = new PriorityMessageQueue<>(new Integer[2]);
+    var stringPriorityMessageQueue = new PriorityMessageQueue<>(new Integer[2]);
     stringPriorityMessageQueue.add(1);
     stringPriorityMessageQueue.add(5);
     stringPriorityMessageQueue.add(10);
     stringPriorityMessageQueue.add(3);
-    assertTrue(stringPriorityMessageQueue.remove() == 10);
+    assertEquals(10, (int) stringPriorityMessageQueue.remove());
   }
 
   @Test
   public void isEmpty() {
-    PriorityMessageQueue<Integer> stringPriorityMessageQueue = new PriorityMessageQueue<>(new Integer[2]);
+    var stringPriorityMessageQueue = new PriorityMessageQueue<>(new Integer[2]);
     assertTrue(stringPriorityMessageQueue.isEmpty());
     stringPriorityMessageQueue.add(1);
     stringPriorityMessageQueue.remove();
@@ -63,12 +63,12 @@ public class PriorityMessageQueueTest {
 
   @Test
   public void testEnsureSize() {
-    PriorityMessageQueue<Integer> stringPriorityMessageQueue = new PriorityMessageQueue<>(new Integer[2]);
+    var stringPriorityMessageQueue = new PriorityMessageQueue<>(new Integer[2]);
     assertTrue(stringPriorityMessageQueue.isEmpty());
     stringPriorityMessageQueue.add(1);
     stringPriorityMessageQueue.add(2);
     stringPriorityMessageQueue.add(2);
     stringPriorityMessageQueue.add(3);
-    assertTrue(stringPriorityMessageQueue.remove() == 3);
+    assertEquals(3, (int) stringPriorityMessageQueue.remove());
   }
 }

priority-queue/src/test/java/com/iluwatar/priority/queue/QueueManagerTest.java

@@ -23,10 +23,10 @@
 
 package com.iluwatar.priority.queue;
 
-import org.junit.jupiter.api.Test;
-
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
+import org.junit.jupiter.api.Test;
+
 /**
  * Check queue manager
  */
@@ -34,21 +34,21 @@ public class QueueManagerTest {
 
   @Test
   public void publishMessage() {
-    QueueManager queueManager = new QueueManager(2);
-    Message testMessage = new Message("Test Message", 1);
+    var queueManager = new QueueManager(2);
+    var testMessage = new Message("Test Message", 1);
     queueManager.publishMessage(testMessage);
-    Message recivedMessage = queueManager.receiveMessage();
+    var recivedMessage = queueManager.receiveMessage();
     assertEquals(testMessage, recivedMessage);
   }
 
   @Test
   public void receiveMessage() {
-    QueueManager queueManager = new QueueManager(2);
-    Message testMessage1 = new Message("Test Message 1", 1);
+    var queueManager = new QueueManager(2);
+    var testMessage1 = new Message("Test Message 1", 1);
     queueManager.publishMessage(testMessage1);
-    Message testMessage2 = new Message("Test Message 2", 2);
+    var testMessage2 = new Message("Test Message 2", 2);
     queueManager.publishMessage(testMessage2);
-    Message recivedMessage = queueManager.receiveMessage();
+    var recivedMessage = queueManager.receiveMessage();
     assertEquals(testMessage2, recivedMessage);
   }
 }