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-
-// $Id$
-
-
-#ifndef _CLIENT_ACCEPTOR_H
-#define _CLIENT_ACCEPTOR_H
-
-/*
- A SOCK_Acceptor knows how to accept socket connections. We'll use
- one of those at the heart of our Logging_Acceptor.
- */
-#include "ace/SOCK_Acceptor.h"
-
-#if !defined (ACE_LACKS_PRAGMA_ONCE)
-# pragma once
-#endif /* ACE_LACKS_PRAGMA_ONCE */
-
-/*
- An Event_Handler is what you register with ACE_Reactor. When events occur,
- the reactor will callback on the Event_Handler. More on that in a few lines.
- */
-#include "ace/Event_Handler.h"
-
-/*
- When a client connects, we'll create a Logging_Handler to deal with the
- connection. Here, we bring in that declaration.
- */
-#include "logger.h"
-
-/*
- Our Logging_Acceptor is derived from ACE_Event_Handler. That lets the
- reactor treat our acceptor just like every other handler.
- */
-class Logging_Acceptor : public ACE_Event_Handler
-{
-public:
-
- /*
- For this simple case we won't bother with either constructor or
- destructor. In a real application you would certainly have them.
- */
-
- /*
- Here's the open() method we called from main(). We have two things
- to accomplish here: (1) Open the acceptor so that we can hear
- client requests and (2) register ourselves with the reactor so that
- we can respond to those requests.
- */
- int open (const ACE_INET_Addr &_addr, ACE_Reactor * _reactor )
- {
- /*
- Perform the open() on the acceptor. We pass through the address
- at which main() wants us to listen. The second parameter tells
- the acceptor it is OK to reuse the address. This is necessary
- sometimes to get around closed connections that haven't timed out.
- */
- if (this->peer_acceptor_.open (_addr, 1) == -1)
- return -1;
-
- /*
- Remember the reactor we're using. We'll need it later when we
- create a client connection handler.
- */
- reactor_ = _reactor;
-
- /*
- Now we can register with the reactor we were given. Since the reactor
- pointer is global, we could have just used that but it's gross enough
- already.
- Notice that we can pass 'this' right into the registration since we're
- derived from ACE_Event_Handler. We also provide ACCEPT_MASK to tell
- the reactor that we want to know about accept requests from clients.
- */
- return _reactor->register_handler( this, ACE_Event_Handler::ACCEPT_MASK );
- }
-
-private:
-
- /*
- To provide multi-OS abstraction, ACE uses the concept of "handles" for
- connection endpoints. In Unix, this is a traditional file descriptor
- (or integer). On other OS's, it may be something else.
- The reactor will need to get the handle (file descriptor) to satisfy
- it's own internal needs. Our relevant handle is the handle of the
- acceptor object, so that's what we provide.
- */
- ACE_HANDLE get_handle (void) const
- {
- return this->peer_acceptor_.get_handle ();
- }
-
- /*
- When an accept request arrives, the reactor will invoke the handle_input()
- callback. This is where we deal with the connection request.
- */
- virtual int handle_input (ACE_HANDLE _handle)
- {
- /*
- The handle provided to us by the reactor is the one that triggered
- our up-call. In some advanced situations, you might actually
- register a single handler for multiple connections. The _handle
- parameter is a way to sort 'em out. Since we don't use that
- here, we simply ignore the parameter with the ACE_UNUSED_ARG() macro.
- */
- ACE_UNUSED_ARG(_handle);
-
- /*
- In response to the connection request, we create a new Logging_Handler.
- This new object will be used to interact with the client until it
- disconnects.
- */
- Logging_Handler *svc_handler = new Logging_Handler;
-
- /*
- To complete the connection, we invoke the accept() method call on
- the acceptor object and provide it with the connection handler instance.
- This transfers "ownership" of the connection from the acceptor to the
- connection handler.
- */
- if (this->peer_acceptor_.accept (*svc_handler) == -1)
- ACE_ERROR_RETURN ((LM_ERROR, "%p", "accept failed"), -1);
-
- /*
- Again, most objects need to be open()ed before they are useful. We'll
- give the handler our reactor pointer so that it can register for
- events as well. If the open fails, we'll force a close().
- */
- if (svc_handler->open (reactor_) == -1)
- svc_handler->close ();
-
- return 0;
- }
-
-protected:
-
- /*
- Our acceptor object instance
- */
- ACE_SOCK_Acceptor peer_acceptor_;
-
- /*
- A place to remember our reactor pointer
- */
- ACE_Reactor * reactor_;
-};
-
-#endif /* _CLIENT_ACCEPTOR_H */
-