[英]Can I use AMQP-CPP without implementing network layer in C++ on Windows?
我正在嘗試使用AMQP-CPP庫與 RabbitMQ 通信並閱讀他們的自述文件並不是那么簡單,如何避免在 Windows 上實現網絡層。
正如我們上面提到的,該庫可以以與網絡無關的方式使用。 然后它自己不做任何 IO,您需要將一個對象傳遞給該庫可用於 IO 的庫。 因此,在開始使用該庫之前,您首先需要創建一個從 ConnectionHandler 基類擴展的類。 這是一個具有許多方法的類,庫每次要發送數據或需要通知您發生錯誤時都會調用這些方法。
#include <amqpcpp.h>
class MyConnectionHandler : public AMQP::ConnectionHandler
{
/**
* 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(AMQP::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
}
/**
* Method that is called by the AMQP library when the login attempt
* succeeded. After this method has been called, the connection is ready
* to use.
* @param connection The connection that can now be used
*/
virtual void onReady(AMQP::Connection *connection)
{
// @todo
// add your own implementation, for example by creating a channel
// instance, and start publishing or consuming
}
/**
* Method that is called by the AMQP library when a fatal error occurs
* on the connection, for example because data received from RabbitMQ
* could not be recognized.
* @param connection The connection on which the error occurred
* @param message A human readable error message
*/
virtual void onError(AMQP::Connection *connection, const char *message)
{
// @todo
// add your own implementation, for example by reporting the error
// to the user of your program, log the error, and destruct the
// connection object because it is no longer in a usable state
}
/**
* Method that is called when the connection was closed. This is the
* counter part of a call to Connection::close() and it confirms that the
* AMQP connection was correctly closed.
*
* @param connection The connection that was closed and that is now unusable
*/
virtual void onClosed(AMQP::Connection *connection)
{
// @todo
// add your own implementation, for example by closing down the
// underlying TCP connection too
}
};
在您實現了 ConnectionHandler 類(這完全取決於您)之后,您可以通過創建一個 Connection 對象和一個或多個 Channel 對象來開始使用該庫:
// create an instance of your own connection handler
MyConnectionHandler myHandler;
// create a AMQP connection object
AMQP::Connection connection(&myHandler, AMQP::Login("guest","guest"), "/");
// and create a channel
AMQP::Channel channel(&connection);
// use the channel object to call the AMQP method you like
channel.declareExchange("my-exchange", AMQP::fanout);
channel.declareQueue("my-queue");
channel.bindQueue("my-exchange", "my-queue", "my-routing-key");
這一切都來自他們的自述文件。
有人可以告訴我有沒有辦法訂閱 RabbitMQ 並使用通道而不在 Windows 上實現 IO?
我知道他們已經為 linux 實現了,但找不到任何適用於 Windows 的工作示例。
你應該能夠在 Windows 上使用libuv
,因此這個處理程序:
https://github.com/CopernicaMarketingSoftware/AMQP-CPP/blob/master/include/amqpcpp/libuv.h
注意: RabbitMQ 團隊監控rabbitmq-users
郵件列表,並且有時只回答 StackOverflow 上的問題。
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