logging_app.cpp

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// $Id: logging_app.cpp 82610 2008-08-12 19:46:36Z parsons $

// This program sends logging records directly to the server, rather
// than going through the client logging daemon.

#include "ace/SOCK_Connector.h"
#include "ace/Log_Record.h"
#include "ace/Log_Msg.h"
#include "ace/Truncate.h"
#include "ace/CDR_Stream.h"
#include "ace/OS_NS_time.h"
#include "ace/OS_NS_stdio.h"
#include "ace/OS_NS_stdlib.h"
#include "ace/OS_NS_unistd.h"

ACE_RCSID(client, logging_app, "$Id: logging_app.cpp 82610 2008-08-12 19:46:36Z parsons $")

static u_short LOGGER_PORT = ACE_DEFAULT_SERVER_PORT;
static const ACE_TCHAR *const LOGGER_HOST = ACE_DEFAULT_SERVER_HOST;
static const int MAX_ITERATIONS = 10;

int
ACE_TMAIN (int argc, ACE_TCHAR *argv[])
{
  const ACE_TCHAR *logger_host = argc > 1 ? argv[1] : LOGGER_HOST;
  u_short logger_port  = argc > 2 ? ACE_OS::atoi (argv[2]) : LOGGER_PORT;
  int max_iterations = argc > 3 ? ACE_OS::atoi (argv[3]) : MAX_ITERATIONS;

  ACE_SOCK_Stream logger;
  ACE_SOCK_Connector connector;
  ACE_INET_Addr addr (logger_port, logger_host);

  if (connector.connect (logger, addr) == -1)
    ACE_ERROR_RETURN ((LM_ERROR, ACE_TEXT ("%p\n"), ACE_TEXT ("open")), -1);

  for (int i = 0; i < max_iterations; i++)
    {
      ACE_Log_Record log_record (LM_DEBUG, 
                                 ACE_OS::time ((time_t *) 0), 
                                 ACE_OS::getpid ());

      ACE_TCHAR buf[BUFSIZ];
      ACE_OS::sprintf (buf, ACE_TEXT ("message = %d\n"), i + 1);
      log_record.msg_data (buf);

      const size_t max_payload_size =
        4 // type()
        + 8 // timestamp
        + 4 // process id
        + 4 // data length
        + ACE_Log_Record::MAXLOGMSGLEN // data
        + ACE_CDR::MAX_ALIGNMENT; // padding;

      // Insert contents of <log_record> into payload stream.
      ACE_OutputCDR payload (max_payload_size);
      payload << log_record;

      // Get the number of bytes used by the CDR stream.
      ACE_CDR::ULong length =
        ACE_Utils::truncate_cast<ACE_CDR::ULong> (payload.total_length ());

      // Send a header so the receiver can determine the byte order and
      // size of the incoming CDR stream.
      ACE_OutputCDR header (ACE_CDR::MAX_ALIGNMENT + 8);
      header << ACE_OutputCDR::from_boolean (ACE_CDR_BYTE_ORDER);

      // Store the size of the payload that follows
      header << ACE_CDR::ULong (length);

      // Use an iovec to send both buffer and payload simultaneously.
      iovec iov[2];  
      iov[0].iov_base = header.begin ()->rd_ptr ();
      iov[0].iov_len  = 8;
      iov[1].iov_base = payload.begin ()->rd_ptr ();
      iov[1].iov_len  = length;

      if (logger.sendv_n (iov, 2) == -1)
        ACE_ERROR_RETURN ((LM_ERROR, "%p\n", "send"), -1);
    }

  if (logger.close () == -1)
    ACE_ERROR_RETURN ((LM_ERROR, ACE_TEXT ("%p\n"), ACE_TEXT ("close")), -1);

  return 0;
}