很早前就仓促的接触过activemq,但当时太赶时间.后面发现activemq 需要了解的东西实在是太多了.
关于activemq 一直想起一遍文章.但也一直缺少自己的见解.或许是网上这些文章太多了.也可能是自己知识还不足够.
0,activemq-cpp 能解决什么问题.
实际应用就是让开发者能从多线程,多消息通信中解救出来.更多的关注应用逻辑.
CMS (stands for C++ Messaging Service) is a JMS-like API for C++ for interfacing with Message Brokers such as Apache ActiveMQ. CMS helps to make your C++ client code much neater and easier to follow. To get a better feel for CMS try the API Reference. ActiveMQ-CPP is a client only library, a message broker such as Apache ActiveMQ is still needed for your clients to communicate.
Our implementation of CMS is called ActiveMQ-CPP, which has an architecture that allows for pluggable transports and wire formats. Currently we support the OpenWire and Stomp protocols, both over TCP and SSL, we also now support a Failover Transport for more reliable client operation. In addition to CMS, ActiveMQ-CPP also provides a robust set of classes that support platform independent constructs such as threading, I/O, sockets, etc. You may find many of these utilities very useful, such as a Java like Thread class or the “synchronized” macro that let’s you use a Java-like synchronization on any object that implements the activemq::concurrent::Synchronizable interface. ActiveMQ-CPP is released under the Apache 2.0 License
大意:
CMS (C++ 消息 服务)是一个面象apache activemq 的 消息 中间层的C++接口.
CMS的实现 叫做activemq-cpp ,不过当前只支持 openwire,amqp,TCP,ssl. 现在还支持 主备切换功能(这个是重点,当时我不懂,结果就走了弯路!_!).
-_- ,意思是 activemq\conf\activemq.xml中的stomp,mqtt,ws 是没办法的.
<transportConnectors> <!-- DOS protection, limit concurrent connections to 1000 and frame size to 100MB --> <transportConnector name="openwire" uri="tcp://0.0.0.0:61616?maximumConnections=1000&wireFormat.maxFrameSize=104857600"/> <transportConnector name="amqp" uri="amqp://0.0.0.0:5672?maximumConnections=1000&wireFormat.maxFrameSize=104857600"/> <transportConnector name="stomp" uri="stomp://0.0.0.0:61613?maximumConnections=1000&wireFormat.maxFrameSize=104857600"/> <transportConnector name="mqtt" uri="mqtt://0.0.0.0:1883?maximumConnections=1000&wireFormat.maxFrameSize=104857600"/> <transportConnector name="ws" uri="ws://0.0.0.0:61614?maximumConnections=1000&wireFormat.maxFrameSize=104857600"/> </transportConnectors>
1,acticvemq-cpp 的配置使用.
参考:Active MQ C++实现通讯 http://blog.csdn.net/lee353086/article/details/6777261
activemq-cpp下载地址:
http://activemq.apache.org/cms/download.html
相关依赖库
在 http://activemq.apache.org/cms/building.html 中是有介绍的.不过是en的.
还是再说下吧.本人en也特差.
“With versions of ActiveMQ-CPP 2.2 and later, we have a dependency on the Apache Portable Runtime project. You’ll need to install APR on your system before you’ll be able to build ActiveMQ-CPP.”
“The package contains a complete set of CppUnit tests. In order for you to build an run the tests, you will need to download and install the CppUnit library. See http://cppunit.sourceforge.net/cppunit-wiki”
所以就包含了:apr,apr-iconv,apr-util,cppunit.
http://mirrors.hust.edu.cn/apache/apr/
中可以下载 apr,apr-iconv,apr-util(版本号都找最高的,不要一高一低,不然编译会出问题).
apr-1.5.1-win32-src.zip,
apr-iconv-1.2.1-win32-src-r2.zip,
apr-util-1.5.4-win32-src.zip.
解压后记得重命令文件夹,去掉版本号,改成如下图,不然工程编译时默认的 [附加包含目录] 是找不到的.
所有文件夹放在一个根目录下.
打开 activemq-cpp-library\vs2008-build\activemq-cpp.sln
依次添加[现在项目]:libapr.vcproj,libapriconv.vcproj,libaprutil.vcproj. 只需要lib项就行了.
最后项目图:
libapriconv.vcproj,libaprutil.vcproj 的[项目依赖项]都需要libapr
activemq-cpp 的[项目依赖项]需要libapriconv,libaprutil,libapr.
activemq-cpp 的[附加包含目录] 需要包含 这三个的的include目录.
经过漫长的编译后,
这个大lib文件就出来.
activemq-cpp-example 这个工程 ,就有 hello world 的代码.
2,activemq-cpp-example 项目代码解析.
通过这个项目可以让我们更好的认识 activemq-cpp的结构.
/*
* 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 <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;
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
auto_ptr<ConnectionFactory> connectionFactory(
ConnectionFactory::createCMSConnectionFactory(brokerURI));
// Create a Connection
connection = connectionFactory->createConnection();
connection->start();
// Create a Session
if (this->sessionTransacted) {
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 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();
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 = true;
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();
}
// END SNIPPET: demo
从main()开始吧.
这样便简快速的实现了应用逻辑.
3,activemq的几种通信模式.
可以参考:
http://shmilyaw-hotmail-com.iteye.com/blog/1897635
目前本人需要的是activemq-cpp的 request-response 模式.
4,activemq-cpp的 request-response 模式的应用.
服务器与客户端通信 数据的交互 和 确认.
以下是本人修改后的简单代码,bug可能存在,请指出.
复制两份,一份定义 USE_COMSUMER 一份定义 USE_PRODUCER 就可以生成.
/*
* 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 <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>
#include <decaf/util/Random.h>
using namespace activemq::core;
using namespace decaf::util::concurrent;
using namespace decaf::util;
using namespace decaf::lang;
using namespace cms;
using namespace std;
#define QUEUE_NAME "eventQueue"
#define NAME_BYTE_LEN 16
class HelloWorldProducer : public ExceptionListener,
public MessageListener,
public Runnable {
private:
CountDownLatch latch;
CountDownLatch doneLatch;
Connection* connection;
Session* session;
Destination* destination;
MessageProducer* producer;
int numMessages;
bool useTopic;
bool sessionTransacted;
std::string brokerURI;
bool bReciveMessage;
long waitMillis;
private:
HelloWorldProducer(const HelloWorldProducer&);
HelloWorldProducer& operator=(const HelloWorldProducer&);
public:
HelloWorldProducer(const std::string& brokerURI, int numMessages, bool useTopic = false, bool sessionTransacted = false,
long waitMillis=3000) :
latch(1),
doneLatch(numMessages),
connection(NULL),
session(NULL),
destination(NULL),
producer(NULL),
numMessages(numMessages),
useTopic(useTopic),
sessionTransacted(sessionTransacted),
brokerURI(brokerURI) ,
bReciveMessage(false),
waitMillis(waitMillis)
{ }
virtual ~HelloWorldProducer(){
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();
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(QUEUE_NAME);
} else {
destination = session->createQueue(QUEUE_NAME);
}
// 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));
//关键消息...
std::auto_ptr<Destination> tempDest(session->createTemporaryQueue());
//cms::Destination tempDest=session->createTemporaryTopic() ;
MessageConsumer * responseConsumer = session->createConsumer(tempDest.get());
responseConsumer->setMessageListener(this);//监听...
message->setCMSReplyTo(tempDest.get());
Random random;
char buffer[NAME_BYTE_LEN]={0};
random.nextBytes((unsigned char *)buffer,NAME_BYTE_LEN);
string correlationId="";
for(int i=0;i<NAME_BYTE_LEN;++i)
{
char ch[NAME_BYTE_LEN*2]={0};
sprintf(ch,"%02X",(unsigned char)buffer[i]);
string str(ch);
correlationId+=str;
}
message->setCMSCorrelationID(correlationId);
message->setIntProperty("Integer", ix);
printf("Producer Sent message #%d from thread %s\n", ix + 1, threadIdStr.c_str());
producer->send(message.get());
// Indicate we are ready for messages.
latch.countDown();
// Wait while asynchronous messages come in.
doneLatch.await(waitMillis);
}
}
catch (CMSException& e) {
printf("Producer run() CMSException \n" );
// Indicate we are ready for messages.
latch.countDown();
e.printStackTrace();
}
}
// Called from the Producer 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);
//ActiveMQMessageTransformation
//std::auto_ptr<TextMessage> responsemessage(session->createTextMessage());
//responsemessage->setCMSCorrelationID(textMessage->getCMSCorrelationID());
//responsemessage->getCMSReplyTo()
string text = "";
if (textMessage != NULL) {
text = textMessage->getText();
} else {
text = "NOT A TEXTMESSAGE!";
}
printf("Producer Message #%d Received: %s\n", count, text.c_str());
//producer.send
} catch (CMSException& e) {
printf("Producer onMessage() CMSException \n" );
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("Producer onException() 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 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;
MessageProducer *producer;
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),
producer(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();
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(QUEUE_NAME);
} else {
destination = session->createQueue(QUEUE_NAME);
}
producer = session->createProducer();
producer->setDeliveryMode(DeliveryMode::NON_PERSISTENT);
// 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();
} catch (CMSException& e) {
printf("Consumer onException() CMS Exception occurred. Shutting down client. \n" );
// 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++;
// Create the Thread Id String
string threadIdStr = Long::toString(Thread::currentThread()->getId());
static bool bPrintf=true;
if(bPrintf)
{
bPrintf=false;
printf("consumer Message threadid: %s\n", threadIdStr.c_str());
}
string strReply="consumer return xxx,ThreadID="+threadIdStr;
const TextMessage* textMessage = dynamic_cast<const TextMessage*> (message);
if(NULL==textMessage)
{
printf("NULL==textMessage", message->getCMSType().c_str());
//const cms::MapMessage* mapMsg = dynamic_cast<const cms::MapMessage*>(message);
//if(mapMsg)
//{
//
// std::vector<std::string> elements = mapMsg->getMapNames();
// std::vector<std::string>::iterator iter = elements.begin();
// for(; iter != elements.end() ; ++iter)
// {
// std::string key = *iter;
// cms::Message::ValueType elementType = mapMsg->getValueType(key);
// string strxxx;
// int cc=0;
// switch(elementType) {
// case cms::Message::BOOLEAN_TYPE:
// //msg->setBoolean(key, mapMsg->getBoolean(key));
// break;
// case cms::Message::BYTE_TYPE:
// //msg->setByte(key, mapMsg->getByte(key));
// break;
// case cms::Message::BYTE_ARRAY_TYPE:
// //msg->setBytes(key, mapMsg->getBytes(key));
// break;
// case cms::Message::CHAR_TYPE:
// //msg->setChar(key, mapMsg->getChar(key));
// break;
// case cms::Message::SHORT_TYPE:
// //msg->setShort(key, mapMsg->getShort(key));
// break;
// case cms::Message::INTEGER_TYPE:
// //msg->setInt(key, mapMsg->getInt(key));
// break;
// case cms::Message::LONG_TYPE:
// //msg->setLong(key, mapMsg->getLong(key));
// break;
// case cms::Message::FLOAT_TYPE:
// //msg->setFloat(key, mapMsg->getFloat(key));
// break;
// case cms::Message::DOUBLE_TYPE:
// //msg->setDouble(key, mapMsg->getDouble(key));
// break;
// case cms::Message::STRING_TYPE:
// //msg->setString(key, mapMsg->getString(key));
// strxxx=mapMsg->getString(key);
// cc=1;
// break;
// default:
// break;
// }
// }
//}
return;
}
std::auto_ptr<TextMessage> responsemessage(session->createTextMessage(strReply));
responsemessage->setCMSCorrelationID(textMessage->getCMSCorrelationID());
string text = "";
if (textMessage != NULL) {
text = textMessage->getText();
} else {
text = "NOT A TEXTMESSAGE!";
}
int nProPerty=textMessage->getIntProperty("Integer");
printf("consumer Message #%d Received: %s,nProPerty[%d]\n", count, text.c_str(),nProPerty);
const cms::Destination* destSend=textMessage->getCMSReplyTo();
if(destSend)
{
this->producer->send(destSend,responsemessage.get());
printf("consumer Message #%d send: %s\n", count, strReply.c_str());
}
} catch (CMSException& e) {
printf("Consumer onMessage() CMS Exception occurred. Shutting down client. \n" );
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("Consumer onException() CMS Exception occurred. Shutting down client. \n" );
//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) {
//if(argc<2)
//{
// printf("argc<2\r\n");
// return 0;
//}
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://192.168.10.143:61616"
// "?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 = true;
int numMessages = 1;
bool useConsumer=true;
bool useProducer=true;
//int nSet=atoi(argv[1]);
//if(1==nSet)
//{
//#define USE_COMSUMER
//}
//else
//{
//#define USE_PRODUCER
//
//}
long long startTime = System::currentTimeMillis();
#ifdef USE_PRODUCER
printf("当前 USE_PRODUCER \r\n");
int numProducerMessages = 30;
int nThreadNumber=10;
vector<HelloWorldProducer *> vHelloWorldProducer;
for(int i=0;i<nThreadNumber;++i)
{
HelloWorldProducer * producerTemp=new HelloWorldProducer(brokerURI, numProducerMessages, useTopics);
vHelloWorldProducer.push_back(producerTemp);
}
#endif
#ifdef USE_COMSUMER
printf("当前 USE_COMSUMER \r\n");
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();
#endif
#ifdef USE_PRODUCER
// Start the producer thread.
vector<Thread *> vThread;
for(int i=0;i<nThreadNumber;++i)
{
HelloWorldProducer & ProducerTemp=*vHelloWorldProducer[i];
Thread * threadTemp=new Thread(&ProducerTemp);
vThread.push_back(threadTemp);
threadTemp->start();
ProducerTemp.waitUntilReady();
}
for(int i=0;i<vThread.size();++i)
{
Thread * threadTemp=vThread[i];
//threadTemp->join();
}
while(1)
{
Thread::sleep(10);
}
//Thread producerThread1(&producer1);
//producerThread1.start();
//producer1.waitUntilReady();
//Thread producerThread2(&producer2);
//producerThread2.start();
//producer2.waitUntilReady();
//Thread producerThread3(&producer3);
//producerThread3.start();
//producer3.waitUntilReady();
#endif
#ifdef USE_PRODUCER
// Wait for the threads to complete.
//producerThread1.join();
//producerThread2.join();
//producerThread3.join();
#endif
#ifdef USE_COMSUMER
consumerThread.join();
#endif
long long endTime = System::currentTimeMillis();
double totalTime = (double)(endTime - startTime) / 1000.0;
#ifdef USE_PRODUCER
//producer1.close();
//producer2.close();
//producer3.close();
for(int i=0;i<vHelloWorldProducer.size();++i)
{
HelloWorldProducer * ProducerTemp=vHelloWorldProducer[i];
ProducerTemp->close();
if(ProducerTemp)
{
delete ProducerTemp;
ProducerTemp=NULL;
}
}
#endif
#ifdef USE_COMSUMER
consumer.close();
#endif
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();
return 0;
}
// END SNIPPET: demo
程序运行结果:
关于activemq-cpp 的Message 消息转换.
activemq-cpp 中的转换ActiveMQMessageTransformation.transformMessage 中是有相应的实现.
////////////////////////////////////////////////////////////////////////////////
bool ActiveMQMessageTransformation::transformMessage(cms::Message* message, ActiveMQConnection* connection, Message** amqMessage) {
if (message == NULL) {
throw NullPointerException(__FILE__, __LINE__, "Provided source cms::Message pointer was NULL");
}
if (amqMessage == NULL) {
throw NullPointerException(__FILE__, __LINE__, "Provided target commands::Message pointer was NULL");
}
*amqMessage = dynamic_cast<Message*>(message);
if (*amqMessage != NULL) {
return false;
} else {
if (dynamic_cast<cms::BytesMessage*>(message) != NULL) {
cms::BytesMessage* bytesMsg = dynamic_cast<cms::BytesMessage*>(message);
bytesMsg->reset();
ActiveMQBytesMessage* msg = new ActiveMQBytesMessage();
msg->setConnection(connection);
try {
for (;;) {
// Reads a byte from the message stream until the stream is empty
msg->writeByte(bytesMsg->readByte());
}
} catch (cms::MessageEOFException& e) {
// if an end of message stream as expected
} catch (cms::CMSException& e) {
}
*amqMessage = msg;
} else if (dynamic_cast<cms::MapMessage*>(message) != NULL) {
cms::MapMessage* mapMsg = dynamic_cast<cms::MapMessage*>(message);
ActiveMQMapMessage* msg = new ActiveMQMapMessage();
msg->setConnection(connection);
std::vector<std::string> elements = mapMsg->getMapNames();
std::vector<std::string>::iterator iter = elements.begin();
for(; iter != elements.end() ; ++iter) {
std::string key = *iter;
cms::Message::ValueType elementType = mapMsg->getValueType(key);
switch(elementType) {
case cms::Message::BOOLEAN_TYPE:
msg->setBoolean(key, mapMsg->getBoolean(key));
break;
case cms::Message::BYTE_TYPE:
msg->setByte(key, mapMsg->getByte(key));
break;
case cms::Message::BYTE_ARRAY_TYPE:
msg->setBytes(key, mapMsg->getBytes(key));
break;
case cms::Message::CHAR_TYPE:
msg->setChar(key, mapMsg->getChar(key));
break;
case cms::Message::SHORT_TYPE:
msg->setShort(key, mapMsg->getShort(key));
break;
case cms::Message::INTEGER_TYPE:
msg->setInt(key, mapMsg->getInt(key));
break;
case cms::Message::LONG_TYPE:
msg->setLong(key, mapMsg->getLong(key));
break;
case cms::Message::FLOAT_TYPE:
msg->setFloat(key, mapMsg->getFloat(key));
break;
case cms::Message::DOUBLE_TYPE:
msg->setDouble(key, mapMsg->getDouble(key));
break;
case cms::Message::STRING_TYPE:
msg->setString(key, mapMsg->getString(key));
break;
default:
break;
}
}
*amqMessage = msg;
} else if (dynamic_cast<cms::ObjectMessage*>(message) != NULL) {
cms::ObjectMessage* objMsg = dynamic_cast<cms::ObjectMessage*>(message);
ActiveMQObjectMessage* msg = new ActiveMQObjectMessage();
msg->setConnection(connection);
msg->setObjectBytes(objMsg->getObjectBytes());
*amqMessage = msg;
} else if (dynamic_cast<cms::StreamMessage*>(message) != NULL) {
cms::StreamMessage* streamMessage = dynamic_cast<cms::StreamMessage*>(message);
streamMessage->reset();
ActiveMQStreamMessage* msg = new ActiveMQStreamMessage();
msg->setConnection(connection);
try {
while(true) {
cms::Message::ValueType elementType = streamMessage->getNextValueType();
int result = -1;
std::vector<unsigned char> buffer(255);
switch(elementType) {
case cms::Message::BOOLEAN_TYPE:
msg->writeBoolean(streamMessage->readBoolean());
break;
case cms::Message::BYTE_TYPE:
msg->writeBoolean(streamMessage->readBoolean());
break;
case cms::Message::BYTE_ARRAY_TYPE:
while ((result = streamMessage->readBytes(buffer)) != -1) {
msg->writeBytes(&buffer[0], 0, result);
buffer.clear();
}
break;
case cms::Message::CHAR_TYPE:
msg->writeChar(streamMessage->readChar());
break;
case cms::Message::SHORT_TYPE:
msg->writeShort(streamMessage->readShort());
break;
case cms::Message::INTEGER_TYPE:
msg->writeInt(streamMessage->readInt());
break;
case cms::Message::LONG_TYPE:
msg->writeLong(streamMessage->readLong());
break;
case cms::Message::FLOAT_TYPE:
msg->writeFloat(streamMessage->readFloat());
break;
case cms::Message::DOUBLE_TYPE:
msg->writeDouble(streamMessage->readDouble());
break;
case cms::Message::STRING_TYPE:
msg->writeString(streamMessage->readString());
break;
default:
break;
}
}
} catch (cms::MessageEOFException& e) {
// if an end of message stream as expected
} catch (cms::CMSException& e) {
}
*amqMessage = msg;
} else if (dynamic_cast<cms::TextMessage*>(message) != NULL) {
cms::TextMessage* textMsg = dynamic_cast<cms::TextMessage*>(message);
ActiveMQTextMessage* msg = new ActiveMQTextMessage();
msg->setConnection(connection);
msg->setText(textMsg->getText());
*amqMessage = msg;
} else {
*amqMessage = new ActiveMQMessage();
(*amqMessage)->setConnection(connection);
}
ActiveMQMessageTransformation::copyProperties(message, dynamic_cast<cms::Message*>(*amqMessage));
}
return true;
}
5,activemq 的activemq broker cluster (activemq 集群).
可以参考:
http://bh-keven.iteye.com/blog/1617788
http://blog.csdn.net/jason5186/article/details/18702523
6,activemq.xml 中的配置和activemq Connection URIS 配置
http://activemq.apache.org/nms/activemq-uri-configuration.html
http://activemq.apache.org/tcp-transport-reference.html
是有相应介绍,但需要花一些时间去读.
//7,wireFormat=openwire 的几种方式.的优缺点.
//openwire,amqp,stomp,mqtt,ws
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