Issue #469: Implementation of Event-based Asynchronous pattern

event-asynchronous/src/main/java/com/iluwatar/event/asynchronous/Event.java

@@ -0,0 +1,88 @@
+/**
+ * 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.
+ */
+package com.iluwatar.event.asynchronous;
+
+/**
+ * 
+ * Each Event runs as a separate/individual thread.
+ *
+ */
+public class Event implements IEvent, Runnable {
+
+  private int eventID;
+  private int eventTime;
+  private Thread thread;
+  private long counter = 0;
+  private boolean isComplete = false;
+  private ThreadCompleteListener eventListener;
+
+  public Event(int eventID, int eventTime) {
+    this.eventID = eventID;
+    this.eventTime = eventTime;
+  }
+
+  @Override
+  public void start() {
+    thread = new Thread(this);
+    thread.start();
+  }
+
+  @Override
+  public void stop() {
+    thread.interrupt();
+  }
+
+  @Override
+  public void status() {
+    if (!isComplete) {
+      System.out.println("[" + eventID + "] I am at not done. [" + counter + "%]");
+    } else {
+      System.out.println("[" + eventID + "] I am done.");
+    }
+  }
+
+  @Override
+  public void run() {
+    long currentTime = System.currentTimeMillis();
+    long endTime = currentTime + (eventTime * 1000);
+    while (System.currentTimeMillis() < endTime) {
+      try {
+        counter += 1;
+        Thread.sleep(5000); // Sleep for 5 seconds.
+      } catch (InterruptedException e) {
+        return;
+      }
+    }
+    isComplete = true;
+    notifyListener();
+  }
+
+  public final void addListener(final ThreadCompleteListener listener) {
+    this.eventListener = listener;
+  }
+
+  public final void removeListener(final ThreadCompleteListener listener) {
+    this.eventListener = null;
+  }
+
+  private final void notifyListener() {
+    if (eventListener != null) {
+      eventListener.notifyOfThreadComplete(eventID);
+    }
+  }
+
+}