gloox 心跳处理封装

来源：互联网发布：冰川网络远征ol2论坛编辑：程序博客网时间：2024/05/05 10:41

通常在客户端与服务器之间需要心跳来维系连接，XMPP可以通过一个扩展协议XEP-0199来实现客户端与服务器端的心跳。

封装思路：

在程序中另起一个线程专门用做心跳处理；GLOOX库里对XEP-0199的ping发送实现是在ClientBase类里的一个方法：

void xmpp Ping( const JID &to, EnentHandler *eh );

在说明这个方法之前先介绍GLOOX里面几个相关的类：

ClientBase : 这个类里面用一个方法xmppPing实现XEP-0199 ping消息发送。

EventHandler : ping事件处理器，观察者，纯虚基类。实现其虚函数可以收到Ping响应时得到处理。

EventDispatcher : ping事件分发器，用于注册及注销EventHandler。

Event : ping事件封装类。

方法说明：Sends a XMPP Ping (XEP-0199) to the given JID. 即发送一个符合xep-0199规范的ping消息给指定的JID。我们这里是做对服务器的心跳，所以这里的JID就是服务器的JID；EventHandler是观察者（设计模式之观察者模式），在xmppPing的实现里会将会由EventDispatcher对象将观察者注册进去，在得到事件时将由EventDispatcher将事件分发给观相应的察者处理。所以我们要实现观察者EventHandler.

class CEventHandler:public EventHandler

{

public:

CEventHandler();

virtual ~CEventHandler();

virtual void handleEvent(const Event& event);

void increaceHeartBeatCount(void);

UINT getHeartBeatCount(){return m_nCount;}

private:

void decreaceHeartBeatCount(void);

UINT m_nCount;

};

[cpp] view plaincopy

class CEventHandler:public EventHandler

{

public:

CEventHandler();

virtual ~CEventHandler();

virtual void handleEvent(const Event& event);

void increaceHeartBeatCount(void);

UINT getHeartBeatCount(){return m_nCount;}

private:

void decreaceHeartBeatCount(void);

UINT m_nCount;

};

[cpp] view plaincopy

CEventHandler::CEventHandler():m_nCount(0)

{

}

CEventHandler::~CEventHandler()

{

}

void CEventHandler::increaceHeartBeatCount()

{

m_nCount++;

return;

}

void CEventHandler::decreaceHeartBeatCount()

{

if (m_nCount > 0)

{

m_nCount--;

}

return;

}

void CEventHandler::handleEvent(const Event& event)

{

std::string sEvent;

switch (event.eventType())

{

case Event::PingPing: //! 收到PING消息

sEvent = "PingPing";

break;

case Event::PingPong: //! 收到返回PONG消息,心跳累计次数减1

sEvent = "PingPong";

decreaceHeartBeatCount();

break;

case Event::PingError: //!

sEvent = "PingError";

break;

default:

break;

}

TRACE("handleEvent:-------------%s\n", sEvent.c_str());

return;

}

[cpp] view plaincopy

CEventHandler::CEventHandler():m_nCount(0)

{

}

CEventHandler::~CEventHandler()

{

}

void CEventHandler::increaceHeartBeatCount()

{

m_nCount++;

return;

}

void CEventHandler::decreaceHeartBeatCount()

{

if (m_nCount > 0)

{

m_nCount--;

}

return;

}

void CEventHandler::handleEvent(const Event& event)

{

std::string sEvent;

switch (event.eventType())

{

case Event::PingPing: //! 收到PING消息

sEvent = "PingPing";

break;

case Event::PingPong: //! 收到返回PONG消息,心跳累计次数减1

sEvent = "PingPong";

decreaceHeartBeatCount();

break;

case Event::PingError: //!

sEvent = "PingError";

break;

default:

break;

}

TRACE("handleEvent:-------------%s\n", sEvent.c_str());

return;

}

心跳线程：

[cpp] view plaincopy

UINT MessageTest::heartBeatThread(LPVOID lpParam)

{

MessageTest* pThis = (MessageTest*)lpParam;

if(NULL == pThis)

return -1;

CEventHandler* pEventHandler = new CEventHandler();

while (!pThis->m_bDisConnect)

{

//! 心跳次数大于三次则通知断链重连，本次心跳线程结束

if (pEventHandler->getHeartBeatCount() > 3)

{

break;

}

pThis->m_client->xmppPing(JID("talk.google.com"), pEventHandler);

pEventHandler->increaceHeartBeatCount();

Sleep(10*1000); //! 发送心跳消息的时间间隔T应由客户端在登录时由服务器返回

}

delete pEventHandler;

TRACE("心跳线程退出\n");

return 0;

}

[cpp] view plaincopy

UINT MessageTest::heartBeatThread(LPVOID lpParam)

{

MessageTest* pThis = (MessageTest*)lpParam;

if(NULL == pThis)

return -1;

CEventHandler* pEventHandler = new CEventHandler();

while (!pThis->m_bDisConnect)

{

//! 心跳次数大于三次则通知断链重连，本次心跳线程结束

if (pEventHandler->getHeartBeatCount() > 3)

{

break;

}

pThis->m_client->xmppPing(JID("talk.google.com"), pEventHandler);

pEventHandler->increaceHeartBeatCount();

Sleep(10*1000); //! 发送心跳消息的时间间隔T应由客户端在登录时由服务器返回

}

delete pEventHandler;

TRACE("心跳线程退出\n");

return 0;