logging_handler.cpp

来自「ACE自适配通信环境（ADAPTIVE Communication Enviro」· C++ 代码 · 共 165 行

// Logging_Handler.cpp,v 4.18 2004/10/27 21:06:58 shuston Exp

#include "ace/Log_Msg.h"

#include "Logging_Handler.h"
#include "Reactor_Singleton.h"
#include "ace/Log_Record.h"
#include "ace/OS_NS_string.h"

ACE_RCSID(simple_server, Logging_Handler, "Logging_Handler.cpp,v 4.18 2004/10/27 21:06:58 shuston Exp")

// Default constructor.

Logging_Handler::Logging_Handler (void)
{
}

Logging_Handler::~Logging_Handler (void)
{
  // Make sure there are no timers.
  REACTOR::instance ()->cancel_timer (this);

  this->cli_stream_.close ();
}

// Extract the underlying ACE_SOCK_Stream (e.g., for purposes of
// accept()).

ACE_SOCK_Stream &
Logging_Handler::peer (void)
{
  return this->cli_stream_;
}

int
Logging_Handler::handle_timeout (const ACE_Time_Value &,
                                 const void *arg)
{
#if defined (ACE_NDEBUG)
  ACE_UNUSED_ARG (arg);
#endif /* ACE_NDEBUG */

  ACE_ASSERT (arg == this);
  ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("(%P|%t) handling timeout from this = %@\n"),
              this));
  return 0;
}

// Perform the logging record receive.

int
Logging_Handler::handle_input (ACE_HANDLE)
{
  ssize_t n;
  size_t len;

  // Perform two recv's to emulate record-oriented semantics.  Note
  // that this code is not entirely portable since it relies on the
  // fact that sizeof (ssize_t) is the same on both the sender and
  // receiver side.  To correctly handle this is painful, and we leave
  // it as an exercise for the reader ;-).

  switch (n = this->cli_stream_.recv ((void *) &len, sizeof len))
    {
    case -1:
      ACE_ERROR_RETURN ((LM_ERROR, ACE_TEXT ("(%P|%t) %p at host %C\n"),
                         ACE_TEXT ("client logger"), this->host_name_), -1);
      /* NOTREACHED */
    case 0:
      ACE_ERROR_RETURN ((LM_ERROR,
                         "(%P|%t) closing log daemon at host %s (fd = %d)\n",
                         this->host_name_, this->get_handle ()), -1);
      /* NOTREACHED */
    case sizeof (size_t):
      {
        ACE_Log_Record lp;

        len = ntohl (len);
        n = this->cli_stream_.recv_n ((void *) &lp, len);
        if (n != (ssize_t) len)
          ACE_ERROR_RETURN ((LM_ERROR, ACE_TEXT ("(%P|%t) %p at host %C\n"),
                             ACE_TEXT ("client logger"), this->host_name_), -1);
        /* NOTREACHED */

        lp.decode ();

        if (lp.length () == n)
          {
            ACE_DEBUG ((LM_DEBUG, ACE_TEXT ("(%P|%t) ")));
            lp.print (ACE_TEXT_CHAR_TO_TCHAR (this->host_name_), 1);
          }
        else
          ACE_ERROR ((LM_ERROR,
                      ACE_TEXT ("(%P|%t) error, lp.length = %d, n = %d\n"),
                      lp.length (), n));
        break;
      }
    default:
      ACE_ERROR_RETURN ((LM_ERROR, ACE_TEXT ("(%P|%t) %p at host %C\n"),
                         ACE_TEXT ("client logger"), this->host_name_), -1);
      /* NOTREACHED */
    }

  return 0;
}

// Extract underlying device descriptor.

ACE_HANDLE
Logging_Handler::get_handle (void) const
{
  return this->cli_stream_.get_handle ();
}

int
Logging_Handler::open (void)
{
  ACE_INET_Addr addr;

  if (this->cli_stream_.get_remote_addr (addr) == -1)
    return -1;
  else
    {
      ACE_OS::strncpy (this->host_name_,
                       addr.get_host_name (),
                       MAXHOSTNAMELEN + 1);

      if (REACTOR::instance ()->register_handler (this, READ_MASK) == -1)
        ACE_ERROR_RETURN ((LM_ERROR,
                           ACE_TEXT ("(%P|%t) can't register with reactor\n")),
                          -1);
      else if (REACTOR::instance ()->schedule_timer
               (this, (const void *) this,
                ACE_Time_Value (2),
                ACE_Time_Value (2)) == -1)
        ACE_ERROR_RETURN ((LM_ERROR,
                           ACE_TEXT ("(%P|%t) can't register with reactor\n")),
                          -1);
      else
        ACE_DEBUG ((LM_DEBUG,
                    ACE_TEXT ("(%P|%t) connected with %C\n"),
                    this->host_name_));
      return 0;
    }
}

// Perform termination activities when deregistered from the
// ACE_Reactor.

int
Logging_Handler::handle_close (ACE_HANDLE, ACE_Reactor_Mask)
{
  // Must have been allocated dynamically
  delete this;
  return 0;
}

// Perform termination activities when close fails.

int
Logging_Handler::close (void)
{
  return this->handle_close ();
}