/* | |
* Licensed to the Apache Software Foundation (ASF) under one | |
* or more contributor license agreements. See the NOTICE file | |
* distributed with this work for additional information | |
* regarding copyright ownership. The ASF licenses this file | |
* to you under the Apache License, Version 2.0 (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.apache.org/licenses/LICENSE-2.0 | |
* | |
* Unless required by applicable law or agreed to in writing, | |
* software distributed under the License is distributed on an | |
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY | |
* KIND, either express or implied. See the License for the | |
* specific language governing permissions and limitations | |
* under the License. | |
*/ | |
using System; | |
using System.IO; | |
using System.Text; | |
using System.Threading; | |
using org.apache.qpid.client; | |
using org.apache.qpid.transport; | |
namespace org.apache.qpid.example.direct | |
{ | |
/// <summary> | |
/// This program is one of three programs designed to be used | |
/// together. These programs use the "amq.direct" exchange. | |
/// | |
/// Producer: | |
/// | |
/// Publishes to a broker, specifying a routing key. | |
/// | |
/// Listener (this program): | |
/// | |
/// Reads from a queue on the broker using a message listener. | |
/// | |
/// </summary> | |
public class Listener | |
{ | |
private static void Main(string[] args) | |
{ | |
string host = args.Length > 0 ? args[0] : "localhost"; | |
int port = args.Length > 1 ? Convert.ToInt32(args[1]) : 5672; | |
Client connection = new Client(); | |
try | |
{ | |
connection.connect(host, port, "test", "guest", "guest"); | |
ClientSession session = connection.createSession(50000); | |
//--------- Main body of program -------------------------------------------- | |
// Create a queue named "message_queue", and route all messages whose | |
// routing key is "routing_key" to this newly created queue. | |
session.queueDeclare("message_queue"); | |
session.exchangeBind("message_queue", "amq.direct", "routing_key"); | |
lock (session) | |
{ | |
// Create a listener and subscribe it to the queue named "message_queue" | |
IMessageListener listener = new MessageListener(session); | |
session.attachMessageListener(listener, "message_queue"); | |
session.messageSubscribe("message_queue"); | |
// Receive messages until all messages are received | |
Monitor.Wait(session); | |
} | |
//--------------------------------------------------------------------------- | |
connection.close(); | |
} | |
catch (Exception e) | |
{ | |
Console.WriteLine("Error: \n" + e.StackTrace); | |
} | |
} | |
} | |
public class MessageListener : IMessageListener | |
{ | |
private readonly ClientSession _session; | |
private readonly RangeSet _range = new RangeSet(); | |
public MessageListener(ClientSession session) | |
{ | |
_session = session; | |
} | |
public void messageTransfer(IMessage m) | |
{ | |
BinaryReader reader = new BinaryReader(m.Body, Encoding.UTF8); | |
byte[] body = new byte[m.Body.Length - m.Body.Position]; | |
reader.Read(body, 0, body.Length); | |
ASCIIEncoding enc = new ASCIIEncoding(); | |
string message = enc.GetString(body); | |
Console.WriteLine("Message: " + message); | |
// Add this message to the list of message to be acknowledged | |
_range.add(m.Id); | |
if( message.Equals("That's all, folks!") ) | |
{ | |
// Acknowledge all the received messages | |
_session.messageAccept(_range); | |
lock(_session) | |
{ | |
Monitor.Pulse(_session); | |
} | |
} | |
} | |
} | |
} |