[英]Can't publish a message successfully on RabbitMQ server with AMQP-CPP
我正在尝试在 windows 上制作一个简单的控制台应用程序。 我已经安装了 AMQP-CPP 并将该库包含在我的 Visual Studio 项目中。 我的任务是创建与 rabbitmq 服务器的简单通信。
function主要是:
#include <amqpcpp.h>
#include "rabbitmqModels.h"
int main(){
string msg = "hello world";
string queueName = "message_queue";
string exchangeName = "myexchange";
string routingKey = "hello";
Address address("amqp://guest:guest@localhost:15672");
MyConnectionHandler myHandler;
Connection connection(&myHandler, address);
Channel channel(&connection);
channel.declareQueue(queueName);
channel.declareExchange(exchangeName, direct).onSuccess([]();
channel.bindQueue(exchangeName, queueName, routingKey);
channel.publish(exchangeName, routingKey, msg, msg.size());
return 0;
}
其中 rabbitmqModels.h 代码是:
using namespace AMQP;
class MyConnectionHandler : public ConnectionHandler
{
private:
/**
* Method that is called by the AMQP library every time it has data
* available that should be sent to RabbitMQ.
* @param connection pointer to the main connection object
* @param data memory buffer with the data that should be sent to RabbitMQ
* @param size size of the buffer
*/
virtual void onData(Connection* connection, const char* data, size_t size)
{
// @todo
// Add your own implementation, for example by doing a call to the
// send() system call. But be aware that the send() call may not
// send all data at once, so you also need to take care of buffering
// the bytes that could not immediately be sent, and try to send
// them again when the socket becomes writable again
}
virtual void onReady(Connection* connection) override
{
// @todo
// add your own implementation, for example by creating a channel
// instance, and start publishing or consuming
std::cout << "Connection is established...\n";
}
virtual void onError(Connection* connection, const char* message)
{
// report error
std::cout << "Connection Error: " << message << std::endl;
}
virtual void onClosed(Connection* connection)
{
std::cout << "closed" << std::endl;
}
virtual void onConnected(Connection* connection)
{
std::cout << "connected" << std::endl;
}
};
代码构建没有错误。 请注意,我的 rabbitmq 服务器在 localhost:15672 上运行,并且我已经定义了队列和交换/路由键。
问题是我看不到任何消息进入我在服务器上定义的队列。 我必须只使用 TCPHandler 吗? 我找不到 windows 的任何 TCPHandler 实现。 你能提供任何帮助吗? 提前致谢!
端口15672
是默认的HTTP
端口,用于管理 web 接口和 REST ZDB974278714CA8ACEDFZACE1604。 您想使用AMQP
端口,即5672
。
将您的代码更改为:
Address address("amqp://guest:guest@localhost:5672");
请注意, RabbitMQ 文档非常详尽。 请花时间阅读并完成其中一个特定于语言的教程。
注意: RabbitMQ 团队监控rabbitmq-users
邮件列表,并且有时只回答 StackOverflow 上的问题。
您的应用程序可能在通道准备好之前就完成了执行。 在执行任何通道操作之前尝试等待channel.onReady()
。 为此,您需要一个事件循环库,如 libev、libevent 或 libuv。
主要的
#include <amqpcpp.h>
#include "rabbitmqModels.h"
#include <amqpcpp/libev.h>
#include <ev.h>
int main()
{
string msg = "hello world";
string queueName = "message_queue";
string exchangeName = "myexchange";
string routingKey = "hello";
// Event loop
auto *loop = EV_DEFAULT;
Address address("amqp://guest:guest@localhost:5672");
MyLibEvHandler myHandler(loop);
Connection connection(&myHandler, address);
Channel channel(&connection);
channel.onReady([&channel]() {
channel.declareQueue(queueName);
channel.declareExchange(exchangeName, direct).onSuccess([]();
channel.bindQueue(exchangeName, queueName, routingKey);
channel.publish(exchangeName, routingKey, msg, msg.size());
});
// Run loop
ev_run(loop, 0);
return 0;
}
MyLibEvHandler
必须继承LibEvHandler
这里有很好的例子(虽然他们使用 TCP): https://github.com/CopernicaMarketingSoftware/AMQP-CPP/tree/master/examples
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