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/*
* 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.Configuration;
using System.IO;
using System.Text;
using System.Threading;
using org.apache.qpid.client;
using org.apache.qpid.transport;
namespace org.apache.qpid.example.requestresponse
{
/// <summary>
/// This program is one of two programs that illustrate the
/// request/response pattern.
///
/// Client (this program):
/// Make requests of a service, print the response.
///
/// Server:
/// Accept requests, set the letters to uppercase in each message, and
/// return it as a response.
///
/// </summary>
internal class RequestResponseClient
{
private static void Main(string[] args)
{
string host = ConfigurationManager.AppSettings["Host"];
int port = int.Parse(ConfigurationManager.AppSettings["Port"]);
string virtualhost = ConfigurationManager.AppSettings["VirtualHost"];
string username = ConfigurationManager.AppSettings["Username"];
string password = ConfigurationManager.AppSettings["Password"];
Client connection = new Client();
try
{
connection.Connect(host, port, virtualhost, username, password);
IClientSession session = connection.CreateSession(50000);
IMessage request = new Message();
//--------- Main body of program --------------------------------------------
// Create a response queue so the server can send us responses
// to our requests. Use the client's session ID as the name
// of the response queue.
string response_queue = "client" + session.GetName();
// Use the name of the response queue as the routing key
session.QueueDeclare(response_queue);
session.ExchangeBind(response_queue, "amq.direct", response_queue);
// Each client sends the name of their own response queue so
// the service knows where to route messages.
request.DeliveryProperties.SetRoutingKey("request");
request.MessageProperties.SetReplyTo(new ReplyTo("amq.direct", response_queue));
lock (session)
{
// Create a listener for the response queue and listen for response messages.
Console.WriteLine("Activating response queue listener for: " + response_queue);
IMessageListener listener = new ClientMessageListener(session);
session.AttachMessageListener(listener, response_queue);
session.MessageSubscribe(response_queue);
// Now send some requests ...
string[] strs = {
"Twas brillig, and the slithy toves",
"Did gire and gymble in the wabe.",
"All mimsy were the borogroves,",
"And the mome raths outgrabe.",
"That's all, folks!"
};
foreach (string s in strs)
{
request.ClearData();
request.AppendData(Encoding.UTF8.GetBytes(s));
session.MessageTransfer("amq.direct", request);
}
Console.WriteLine("Waiting for all responses to arrive ...");
Monitor.Wait(session);
}
//---------------------------------------------------------------------------
connection.Close();
}
catch (Exception e)
{
Console.WriteLine("Error: \n" + e.StackTrace);
}
}
}
public class ClientMessageListener : IMessageListener
{
private readonly IClientSession _session;
private readonly RangeSet _range = new RangeSet();
private int _counter;
public ClientMessageListener(IClientSession session)
{
_session = session;
}
public void MessageTransfer(IMessage m)
{
_counter++;
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("Response: " + message);
// Add this message to the list of message to be acknowledged
_range.Add(m.Id);
if (_counter == 4)
{
Console.WriteLine("Shutting down listener for " + m.DeliveryProperties.GetRoutingKey());
// Acknowledge all the received messages
_session.MessageAccept(_range);
lock (_session)
{
Monitor.Pulse(_session);
}
}
}
}
}
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