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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.
*
*/
/**
* This file provides a simple test (and example) of basic
* functionality including declaring an exchange and a queue, binding
* these together, publishing a message and receiving that message
* asynchronously.
*/
#include <iostream>
#include <QpidError.h>
#include <ClientChannel.h>
#include <Connection.h>
#include <ClientMessage.h>
#include <MessageListener.h>
#include <sys/Monitor.h>
#include <FieldTable.h>
using namespace qpid::client;
using namespace qpid::sys;
using std::string;
/**
* A simple message listener implementation that prints out the
* message content then notifies a montitor allowing the test to
* complete.
*/
class SimpleListener : public virtual MessageListener{
Monitor* monitor;
public:
inline SimpleListener(Monitor* _monitor) : monitor(_monitor){}
inline virtual void received(Message& msg){
std::cout << "Received message " << msg.getData() << std::endl;
monitor->notify();
}
};
int main(int argc, char**)
{
try{
//Use a custom exchange
Exchange exchange("MyExchange", Exchange::TOPIC_EXCHANGE);
//Use a named, temporary queue
Queue queue("MyQueue", true);
Connection con(argc > 1);
string host("localhost");
con.open(host, 5672, "guest", "guest", "/test");
std::cout << "Opened connection." << std::endl;
//Create and open a channel on the connection through which
//most functionality is exposed
Channel channel;
con.openChannel(&channel);
std::cout << "Opened channel." << std::endl;
//'declare' the exchange and the queue, which will create them
//as they don't exist
channel.declareExchange(exchange);
std::cout << "Declared exchange." << std::endl;
channel.declareQueue(queue);
std::cout << "Declared queue." << std::endl;
//now bind the queue to the exchange
qpid::framing::FieldTable args;
channel.bind(exchange, queue, "MyTopic", args);
std::cout << "Bound queue to exchange." << std::endl;
//Set up a message listener to receive any messages that
//arrive in our queue on the broker. We only expect one, and
//as it will be received on another thread, we create a
//montior to use to notify the main thread when that message
//is received.
Monitor monitor;
SimpleListener listener(&monitor);
string tag("MyTag");
channel.consume(queue, tag, &listener);
std::cout << "Registered consumer." << std::endl;
//we need to enable the message dispatching for this channel
//and we want that to occur on another thread so we call
//start().
channel.start();
//Now we create and publish a message to our exchange with a
//routing key that will cause it to be routed to our queue
Message msg;
string data("MyMessage");
msg.setData(data);
channel.publish(msg, exchange, "MyTopic");
std::cout << "Published message: " << data << std::endl;
{
Monitor::ScopedLock l(monitor);
//now we wait until we receive notification that the
//message was received
monitor.wait();
}
//close the channel & connection
con.closeChannel(&channel);
std::cout << "Closed channel." << std::endl;
con.close();
std::cout << "Closed connection." << std::endl;
}catch(qpid::QpidError error){
std::cout << "Error [" << error.code << "] " << error.msg << " ("
<< error.location.file << ":" << error.location.line
<< ")" << std::endl;
return 1;
}
return 0;
}
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