Acceptor模型和Connector模型学习
前面学习ACE Reactor模型的时候写了CClientSocketAccept 类来处理客户端的连接,在接收到连接后用CClientSocketHandler来处理数据的发送和接收.现在将CClientSocketHandler类作为模板参数传递,同时也将真正接收连接操作的ACE_SOCK_Acceptor类作为模板参数传递,重构后如下:
Connector模型同理,略过不提.下面简略地介绍下ACE_Acceptor处理的过程.其接收到客户端连接后,调用handle_input成员方法, handle_input流程如下:/*
* 接受连接处理类
*/
template< typename TSocketHandler, typename TAcceptor >
class CClientSocketAcceptT : public ACE_Event_Handler
{
private:
TAcceptor m_acceptor;
public:
virtual ~CClientSocketAcceptT()
{
this->handle_close( ACE_INVALID_HANDLE, 0 );
}
int Init( const ACE_INET_Addr& addr )
{
if( this->m_acceptor.open( addr, 1 ) == -1 )
{
int n = errno;
ACE_ERROR_RETURN(( LM_ERROR, ACE_TEXT("ACE_SOCK_Acceptor.open() Failed")), -1 );
}
return this->reactor()->register_handler( this, ACE_Event_Handler::ACCEPT_MASK );
}
virtual ACE_HANDLE get_handle (void) const
{
return m_acceptor.get_handle();
}
virtual int handle_input ( ACE_HANDLE handle = ACE_INVALID_HANDLE )
{
//有新的连接来到了
TSocketHandler *pSockHandler = NULL;
ACE_NEW_RETURN( pSockHandler, TSocketHandler, -1 );
if( this->m_acceptor.accept( pSockHandler->Peer() ) == -1 )
{
delete pSockHandler;
ACE_ERROR_RETURN(( LM_ERROR, ACE_TEXT("ACE_SOCK_Acceptor.accept() Failed")), -1 );
}
pSockHandler->reactor( this->reactor() );
if( pSockHandler->Init() == -1 )
{
pSockHandler->handle_close( ACE_INVALID_HANDLE, 0 );
}
return 0;
}
virtual int handle_close ( ACE_HANDLE , ACE_Reactor_Mask )
{
if ( this->m_acceptor.get_handle() != ACE_INVALID_HANDLE )
{
ACE_Reactor_Mask mask = ACE_Event_Handler::ACCEPT_MASK | ACE_Event_Handler::DONT_CALL;
this->reactor()->remove_handler( this, mask );
this->m_acceptor.close();
}
return 0;
}
};
typedef CClientSocketAcceptT<CClientSocketHandler,ACE_SOCK_Acceptor> CClientSocketAccept;
于是Acceptor模型就已显现雏形了.改进之处在于消除了接收器和服务处理器之间的耦合.下面用Acceptor模型写个示例:
* 接受连接处理类
*/
template< typename TSocketHandler, typename TAcceptor >
class CClientSocketAcceptT : public ACE_Event_Handler
{
private:
TAcceptor m_acceptor;
public:
virtual ~CClientSocketAcceptT()
{
this->handle_close( ACE_INVALID_HANDLE, 0 );
}
int Init( const ACE_INET_Addr& addr )
{
if( this->m_acceptor.open( addr, 1 ) == -1 )
{
int n = errno;
ACE_ERROR_RETURN(( LM_ERROR, ACE_TEXT("ACE_SOCK_Acceptor.open() Failed")), -1 );
}
return this->reactor()->register_handler( this, ACE_Event_Handler::ACCEPT_MASK );
}
virtual ACE_HANDLE get_handle (void) const
{
return m_acceptor.get_handle();
}
virtual int handle_input ( ACE_HANDLE handle = ACE_INVALID_HANDLE )
{
//有新的连接来到了
TSocketHandler *pSockHandler = NULL;
ACE_NEW_RETURN( pSockHandler, TSocketHandler, -1 );
if( this->m_acceptor.accept( pSockHandler->Peer() ) == -1 )
{
delete pSockHandler;
ACE_ERROR_RETURN(( LM_ERROR, ACE_TEXT("ACE_SOCK_Acceptor.accept() Failed")), -1 );
}
pSockHandler->reactor( this->reactor() );
if( pSockHandler->Init() == -1 )
{
pSockHandler->handle_close( ACE_INVALID_HANDLE, 0 );
}
return 0;
}
virtual int handle_close ( ACE_HANDLE , ACE_Reactor_Mask )
{
if ( this->m_acceptor.get_handle() != ACE_INVALID_HANDLE )
{
ACE_Reactor_Mask mask = ACE_Event_Handler::ACCEPT_MASK | ACE_Event_Handler::DONT_CALL;
this->reactor()->remove_handler( this, mask );
this->m_acceptor.close();
}
return 0;
}
};
typedef CClientSocketAcceptT<CClientSocketHandler,ACE_SOCK_Acceptor> CClientSocketAccept;
/*
* 网络数据读取发送操作的封装
*/
class CClientSocketHandler2 : public ACE_Svc_Handler<ACE_SOCK_Stream,ACE_NULL_SYNCH>
{
private:
typedef ACE_Svc_Handler<ACE_SOCK_Stream,ACE_NULL_SYNCH> super;
ACE_TCHAR m_szName[MAXHOSTNAMELEN]; //保存连接上的主机名
public:
virtual int open (void *p = 0)
{
if( super::open( p ) == -1 ) //父类open方法默认向反应器注册READ_MASK事件
return -1;
ACE_INET_Addr addrRemote;
if( this->peer().get_remote_addr( addrRemote ) == 0 ) //获取连接的远程地址
{
if( addrRemote.addr_to_string( m_szName, sizeof( ACE_TCHAR) * _countof( m_szName ) ) == 0 )
{
ACE_DEBUG(( LM_DEBUG, ACE_TEXT("%s connected!\n"), m_szName ));
}
}
return 0;
}
virtual int handle_input ( ACE_HANDLE )
{
//此时在网络连接上有数据可以读取
char szBuffer[4096];
ssize_t nRecv = 0;
nRecv = this->peer().recv( szBuffer, _countof(szBuffer) );
if( nRecv <= 0 )
{
ACE_DEBUG(( LM_DEBUG, ACE_TEXT("%s connection closed\n"), m_szName ));
return -1;
}
szBuffer[nRecv] = '\0';
//显示读取数据
ACE_DEBUG(( LM_DEBUG, ACE_TEXT("recv from:%s msg:%s\n"), m_szName, ACE_TEXT_CHAR_TO_TCHAR(szBuffer) ));
return 0;
}
};
typedef ACE_Acceptor<CClientSocketHandler2, ACE_SOCK_Acceptor> CClientSocketAccept2;
//使用示例
//监听9981端口,循环处理客户端连接
ACE_INET_Addr addr( 9981 ); //监听9981端口
ACE_Reactor* pReactor = ACE_Reactor::instance();
CClientSocketAccept2 acceptor;
if( acceptor.open( addr, pReactor ) == -1)
{
return -1;
}
pReactor->run_reactor_event_loop();
* 网络数据读取发送操作的封装
*/
class CClientSocketHandler2 : public ACE_Svc_Handler<ACE_SOCK_Stream,ACE_NULL_SYNCH>
{
private:
typedef ACE_Svc_Handler<ACE_SOCK_Stream,ACE_NULL_SYNCH> super;
ACE_TCHAR m_szName[MAXHOSTNAMELEN]; //保存连接上的主机名
public:
virtual int open (void *p = 0)
{
if( super::open( p ) == -1 ) //父类open方法默认向反应器注册READ_MASK事件
return -1;
ACE_INET_Addr addrRemote;
if( this->peer().get_remote_addr( addrRemote ) == 0 ) //获取连接的远程地址
{
if( addrRemote.addr_to_string( m_szName, sizeof( ACE_TCHAR) * _countof( m_szName ) ) == 0 )
{
ACE_DEBUG(( LM_DEBUG, ACE_TEXT("%s connected!\n"), m_szName ));
}
}
return 0;
}
virtual int handle_input ( ACE_HANDLE )
{
//此时在网络连接上有数据可以读取
char szBuffer[4096];
ssize_t nRecv = 0;
nRecv = this->peer().recv( szBuffer, _countof(szBuffer) );
if( nRecv <= 0 )
{
ACE_DEBUG(( LM_DEBUG, ACE_TEXT("%s connection closed\n"), m_szName ));
return -1;
}
szBuffer[nRecv] = '\0';
//显示读取数据
ACE_DEBUG(( LM_DEBUG, ACE_TEXT("recv from:%s msg:%s\n"), m_szName, ACE_TEXT_CHAR_TO_TCHAR(szBuffer) ));
return 0;
}
};
typedef ACE_Acceptor<CClientSocketHandler2, ACE_SOCK_Acceptor> CClientSocketAccept2;
//使用示例
//监听9981端口,循环处理客户端连接
ACE_INET_Addr addr( 9981 ); //监听9981端口
ACE_Reactor* pReactor = ACE_Reactor::instance();
CClientSocketAccept2 acceptor;
if( acceptor.open( addr, pReactor ) == -1)
{
return -1;
}
pReactor->run_reactor_event_loop();
1.调用make_svc_handler成员方法创建连接处理对象,即此例中的CClientSocketHandler2的实例
2.调用accept_svc_handler成员方法进行接收操作
3.调用activate_svc_handler成员方法,其调用CClientSocketHandler2的open方法,完成服务处理器的初始化