使用ActiveMQ进行C++与C#的通信4 - 使用C++连接ActiveMQ

在上一节编译ActiveMQ-CPP的基础上，创建C++控制台应用程序，将activemq-cpp项目中的include文件夹拷贝到该C++项目中，设置好附加包含目录。

将生成好的libactivemq-cppd.dll、libactivemq-cppd.lib拷贝到当前项目，设置好附加库目录和附加依赖项。

参考activemq-cpp\src\examples\producers\SimpleProducer.cpp中的生产者模型代码，得到如下发送消息代码：

/*
* 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.
*/

// START SNIPPET: demo
#include "stdafx.h"
#include <activemq/library/ActiveMQCPP.h>
#include <decaf/lang/Thread.h>
#include <decaf/lang/Runnable.h>
#include <decaf/util/concurrent/CountDownLatch.h>
#include <decaf/lang/Integer.h>
#include <decaf/lang/Long.h>
#include <decaf/lang/System.h>
#include <activemq/core/ActiveMQConnectionFactory.h>
#include <activemq/util/Config.h>
#include <cms/Connection.h>
#include <cms/Session.h>
#include <cms/TextMessage.h>
#include <cms/BytesMessage.h>
#include <cms/MapMessage.h>
#include <cms/ExceptionListener.h>
#include <cms/MessageListener.h>
#include <stdlib.h>
#include <stdio.h>
#include <iostream>
#include <memory>

using namespace activemq::core;
using namespace decaf::util::concurrent;
using namespace decaf::util;
using namespace decaf::lang;
using namespace cms;
using namespace std;

#pragma comment(lib, "..\\ActiveMQ-cpp\\lib\\Debug\\libactivemq-cppd.lib")

class HelloWorldProducer : public Runnable {
private:

Connection* connection;
Session* session;
Destination* destination;
MessageProducer* producer;
int numMessages;
bool useTopic;
bool sessionTransacted;
std::string brokerURI;

private:

HelloWorldProducer(const HelloWorldProducer&);
HelloWorldProducer& operator=(const HelloWorldProducer&);

public:

HelloWorldProducer(const std::string& brokerURI, int numMessages, bool useTopic = false, bool sessionTransacted = false) :
connection(NULL),
session(NULL),
destination(NULL),
producer(NULL),
numMessages(numMessages),
useTopic(useTopic),
sessionTransacted(sessionTransacted),
brokerURI(brokerURI) {
}

virtual ~HelloWorldProducer(){
cleanup();
}

void close() {
this->cleanup();
}

virtual void run() {

try {

// Create a ConnectionFactory
brokerURI = "tcp://localhost:61616?wireFormat=openwire&connection.useAsyncSend=true";
auto_ptr<ConnectionFactory> connectionFactory(
ConnectionFactory::createCMSConnectionFactory(brokerURI));

// Create a Connection
connection = connectionFactory->createConnection("system", "manager");
connection->start();

// Create a Session
//             if (this->sessionTransacted) {
//                 session = connection->createSession(Session::SESSION_TRANSACTED);
//             } else {
//                 session = connection->createSession(Session::AUTO_ACKNOWLEDGE);
//             }
session = connection->createSession();

// Create the destination (Topic or Queue)
if (useTopic) {
destination = session->createTopic("test.log");
} else {
destination = session->createQueue("test.log");
}

// Create a MessageProducer from the Session to the Topic or Queue
producer = session->createProducer(destination);
producer->setDeliveryMode(DeliveryMode::NON_PERSISTENT);

// Create the Thread Id String
string threadIdStr = Long::toString(Thread::currentThread()->getId());

// Create a messages
string text = (string) "Hello world! from thread " + threadIdStr;

for (int ix = 0; ix < numMessages; ++ix) {
std::auto_ptr<TextMessage> message(session->createTextMessage(text));
message->setIntProperty("Integer", ix);
printf("Sent message #%d from thread %s\n", ix + 1, threadIdStr.c_str());
producer->send(message.get());
}

} catch (CMSException& e) {
e.printStackTrace();
}
}

private:

void cleanup() {

if (connection != NULL) {
try {
connection->close();
} catch (cms::CMSException& ex) {
ex.printStackTrace();
}
}

// Destroy resources.
try {
delete destination;
destination = NULL;
delete producer;
producer = NULL;
delete session;
session = NULL;
delete connection;
connection = NULL;
} catch (CMSException& e) {
e.printStackTrace();
}
}
};

class HelloWorldConsumer : public ExceptionListener,
public MessageListener,
public Runnable {

private:

CountDownLatch latch;
CountDownLatch doneLatch;
Connection* connection;
Session* session;
Destination* destination;
MessageConsumer* consumer;
long waitMillis;
bool useTopic;
bool sessionTransacted;
std::string brokerURI;

private:

HelloWorldConsumer(const HelloWorldConsumer&);
HelloWorldConsumer& operator=(const HelloWorldConsumer&);

public:

HelloWorldConsumer(const std::string& brokerURI, int numMessages, bool useTopic = false, bool sessionTransacted = false, int waitMillis = 30000) :
latch(1),
doneLatch(numMessages),
connection(NULL),
session(NULL),
destination(NULL),
consumer(NULL),
waitMillis(waitMillis),
useTopic(useTopic),
sessionTransacted(sessionTransacted),
brokerURI(brokerURI) {
}

virtual ~HelloWorldConsumer() {
cleanup();
}

void close() {
this->cleanup();
}

void waitUntilReady() {
latch.await();
}

virtual void run() {

try {

// Create a ConnectionFactory
auto_ptr<ConnectionFactory> connectionFactory(
ConnectionFactory::createCMSConnectionFactory(brokerURI));

// Create a Connection
connection = connectionFactory->createConnection("system", "manager");
connection->start();
connection->setExceptionListener(this);

// Create a Session
if (this->sessionTransacted == true) {
session = connection->createSession(Session::SESSION_TRANSACTED);
} else {
session = connection->createSession(Session::AUTO_ACKNOWLEDGE);
}

// Create the destination (Topic or Queue)
if (useTopic) {
destination = session->createTopic("TEST.FOO");
} else {
destination = session->createQueue("TEST.FOO");
}

// Create a MessageConsumer from the Session to the Topic or Queue
consumer = session->createConsumer(destination);

consumer->setMessageListener(this);

std::cout.flush();
std::cerr.flush();

// Indicate we are ready for messages.
latch.countDown();

// Wait while asynchronous messages come in.
doneLatch.await(waitMillis);

} catch (CMSException& e) {
// Indicate we are ready for messages.
latch.countDown();
e.printStackTrace();
}
}

// Called from the consumer since this class is a registered MessageListener.
virtual void onMessage(const Message* message) {

static int count = 0;

try {
count++;
const TextMessage* textMessage = dynamic_cast<const TextMessage*> (message);
string text = "";

if (textMessage != NULL) {
text = textMessage->getText();
} else {
text = "NOT A TEXTMESSAGE!";
}

printf("Message #%d Received: %s\n", count, text.c_str());

} catch (CMSException& e) {
e.printStackTrace();
}

// Commit all messages.
if (this->sessionTransacted) {
session->commit();
}

// No matter what, tag the count down latch until done.
doneLatch.countDown();
}

// If something bad happens you see it here as this class is also been
// registered as an ExceptionListener with the connection.
virtual void onException(const CMSException& ex AMQCPP_UNUSED) {
printf("CMS Exception occurred.  Shutting down client.\n");
ex.printStackTrace();
exit(1);
}

private:

void cleanup() {
if (connection != NULL) {
try {
connection->close();
} catch (cms::CMSException& ex) {
ex.printStackTrace();
}
}

// Destroy resources.
try {
delete destination;
destination = NULL;
delete consumer;
consumer = NULL;
delete session;
session = NULL;
delete connection;
connection = NULL;
} catch (CMSException& e) {
e.printStackTrace();
}
}
};

int main(int argc AMQCPP_UNUSED, char* argv[] AMQCPP_UNUSED) {

activemq::library::ActiveMQCPP::initializeLibrary();
{
std::cout << "=====================================================\n";
std::cout << "Starting the example:" << std::endl;
std::cout << "-----------------------------------------------------\n";

// Set the URI to point to the IP Address of your broker.
// add any optional params to the url to enable things like
// tightMarshalling or tcp logging etc.  See the CMS web site for
// a full list of configuration options.
//
//  http://activemq.apache.org/cms/ //
// Wire Format Options:
// =========================
// Use either stomp or openwire, the default ports are different for each
//
// Examples:
//    tcp://127.0.0.1:61616                      default to openwire
//    tcp://127.0.0.1:61616?wireFormat=openwire  same as above
//    tcp://127.0.0.1:61613?wireFormat=stomp     use stomp instead
//
// SSL:
// =========================
// To use SSL you need to specify the location of the trusted Root CA or the
// certificate for the broker you want to connect to.  Using the Root CA allows
// you to use failover with multiple servers all using certificates signed by
// the trusted root.  If using client authentication you also need to specify
// the location of the client Certificate.
//
//     System::setProperty( "decaf.net.ssl.keyStore", "<path>/client.pem" );
//     System::setProperty( "decaf.net.ssl.keyStorePassword", "password" );
//     System::setProperty( "decaf.net.ssl.trustStore", "<path>/rootCA.pem" );
//
// The you just specify the ssl transport in the URI, for example:
//
//     ssl://localhost:61617
//
std::string brokerURI =
"failover:(tcp://localhost:61616"
//        "?wireFormat=openwire"
//        "&transport.useInactivityMonitor=false"
//        "&connection.alwaysSyncSend=true"
//        "&connection.useAsyncSend=true"
//        "?transport.commandTracingEnabled=true"
//        "&transport.tcpTracingEnabled=true"
//        "&wireFormat.tightEncodingEnabled=true"
")";

//============================================================
// set to true to use topics instead of queues
// Note in the code above that this causes createTopic or
// createQueue to be used in both consumer an producer.
//============================================================
bool useTopics = false;
bool sessionTransacted = false;
int numMessages = 2000;

long long startTime = System::currentTimeMillis();

HelloWorldProducer producer(brokerURI, numMessages, useTopics);
//HelloWorldConsumer consumer(brokerURI, numMessages, useTopics, sessionTransacted);

// Start the consumer thread.
//     Thread consumerThread(&consumer);
//     consumerThread.start();

// Wait for the consumer to indicate that its ready to go.
//consumer.waitUntilReady();

// Start the producer thread.
Thread producerThread(&producer);
producerThread.start();

// Wait for the threads to complete.
producerThread.join();
//consumerThread.join();

long long endTime = System::currentTimeMillis();
double totalTime = (double)(endTime - startTime) / 1000.0;

//consumer.close();
producer.close();

std::cout << "Time to completion = " << totalTime << " seconds." << std::endl;
std::cout << "-----------------------------------------------------\n";
std::cout << "Finished with the example." << std::endl;
std::cout << "=====================================================\n";

}
activemq::library::ActiveMQCPP::shutdownLibrary();

//TODO  异步
int n = 0;
cin >> n;
}

// END SNIPPET: demo