added confirm example

Author: Alexandru Scvortov

test/src/com/rabbitmq/examples/ConfirmDontLoseMessages.java

@@ -0,0 +1,126 @@
+//   The contents of this file are subject to the Mozilla Public License
+//   Version 1.1 (the "License"); you may not use this file except in
+//   compliance with the License. You may obtain a copy of the License at
+//   http://www.mozilla.org/MPL/
+//
+//   Software distributed under the License is distributed on an "AS IS"
+//   basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the
+//   License for the specific language governing rights and limitations
+//   under the License.
+//
+//   The Original Code is RabbitMQ.
+//
+//   The Initial Developers of the Original Code are LShift Ltd,
+//   Cohesive Financial Technologies LLC, and Rabbit Technologies Ltd.
+//
+//   Portions created before 22-Nov-2008 00:00:00 GMT by LShift Ltd,
+//   Cohesive Financial Technologies LLC, or Rabbit Technologies Ltd
+//   are Copyright (C) 2007-2008 LShift Ltd, Cohesive Financial
+//   Technologies LLC, and Rabbit Technologies Ltd.
+//
+//   Portions created by LShift Ltd are Copyright (C) 2007-2010 LShift
+//   Ltd. Portions created by Cohesive Financial Technologies LLC are
+//   Copyright (C) 2007-2010 Cohesive Financial Technologies
+//   LLC. Portions created by Rabbit Technologies Ltd are Copyright
+//   (C) 2007-2010 Rabbit Technologies Ltd.
+//
+//   All Rights Reserved.
+//
+//   Contributor(s): ______________________________________.
+//
+
+package com.rabbitmq.examples;
+
+import com.rabbitmq.client.AMQP;
+import com.rabbitmq.client.AckListener;
+import com.rabbitmq.client.Channel;
+import com.rabbitmq.client.Connection;
+import com.rabbitmq.client.ConnectionFactory;
+import com.rabbitmq.client.MessageProperties;
+import com.rabbitmq.client.QueueingConsumer;
+
+import java.util.Collections;
+import java.util.SortedSet;
+import java.util.TreeSet;
+
+import java.io.IOException;
+
+public class ConfirmDontLoseMessages {
+    final static int MSG_COUNT = 10000;
+    final static String QUEUE_NAME = "confirm-test";
+    static ConnectionFactory connectionFactory;
+
+    public static void main(String[] args)
+        throws IOException, InterruptedException
+    {
+        connectionFactory = new ConnectionFactory();
+
+        (new Thread(new Consumer())).start();
+        (new Thread(new Publisher())).start();
+    }
+
+    static class Publisher implements Runnable {
+        volatile SortedSet<Long> ackSet = Collections.synchronizedSortedSet(new TreeSet<Long>());
+
+        public void run() {
+            try {
+                long startTime = System.currentTimeMillis();
+
+                Connection conn = connectionFactory.newConnection();
+                Channel ch = conn.createChannel();
+                ch.queueDeclare(QUEUE_NAME, true, false, true, null);
+                ch.confirmSelect(true);
+                ch.setAckListener(new AckListener() {
+                        public void handleAck(long seqNo,
+                                              boolean multiple) {
+                            if (multiple) {
+                                for (long i = ackSet.first(); i <= seqNo; ++i)
+                                    ackSet.remove(i);
+                            } else {
+                                    ackSet.remove(seqNo);
+                            }
+                        }
+                    });
+
+                for (long i = 0; i < MSG_COUNT; ++i) {
+                    ackSet.add(i);
+                    ch.basicPublish("", QUEUE_NAME,
+                                    MessageProperties.PERSISTENT_BASIC,
+                                    "nop".getBytes());
+                }
+
+                while (ackSet.size() > 0)
+                    Thread.sleep(10);
+
+                ch.close();
+                conn.close();
+
+                long endTime = System.currentTimeMillis();
+                System.out.printf("Test took %.3fs\n", (float)(endTime - startTime)/1000);
+            } catch (Throwable e) {
+                System.out.println("foobar :(");
+                System.out.print(e);
+            }
+        }
+    }
+
+    static class Consumer implements Runnable {
+        public void run() {
+            try {
+                Connection conn = connectionFactory.newConnection();
+                Channel ch = conn.createChannel();
+                ch.queueDeclare(QUEUE_NAME, true, false, true, null);
+                QueueingConsumer qc = new QueueingConsumer(ch);
+                ch.basicConsume(QUEUE_NAME, true, qc);
+                for (int i = 0; i < MSG_COUNT; ++i) {
+                    qc.nextDelivery();
+                }
+                ch.close();
+                conn.close();
+            } catch (Throwable e) {
+                System.out.println("Whoosh!");
+                System.out.print(e);
+            }
+        }
+    }
+}