added Poison Pill idiom

poison-pill/src/main/java/com/iluwatar/Consumer.java

@@ -0,0 +1,38 @@
+package com.iluwatar;
+
+import com.iluwatar.Message.Headers;
+
+/**
+ * Class responsible for receiving and handling submitted to the queue messages
+ */
+public class Consumer {
+
+	private final MQSubscribePoint queue;
+	private final String name;
+
+	public Consumer(String name, MQSubscribePoint queue) {
+		this.name = name;
+		this.queue = queue;
+	}
+
+	public void consume() {
+		while (true) {
+			Message msg;
+			try {
+				msg = queue.take();
+				if (msg == Message.POISON_PILL) {
+					System.out.println(String.format("Consumer %s receive request to terminate.", name));
+					break;
+				}
+			} catch (InterruptedException e) {
+				// allow thread to exit
+				System.err.println(e);
+				return;
+			}
+
+			String sender = msg.getHeader(Headers.SENDER);
+			String body = msg.getBody();
+			System.out.println(String.format("Message [%s] from [%s] received by [%s]", body, sender, name));
+		}
+	}
+}