log_listner.cpp

/*
   Copyright (c) 2007, 2010, Oracle and/or its affiliates. All rights reserved.

   This program is free software; you can redistribute it and/or modify
   it under the terms of the GNU General Public License as published by
   the Free Software Foundation; version 2 of the License.

   This program is distributed in the hope that it will be useful,
   but WITHOUT ANY WARRANTY; without even the implied warranty of
   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
   GNU General Public License for more details.

   You should have received a copy of the GNU General Public License
   along with this program; if not, write to the Free Software
   Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301  USA
*/

#include <mgmapi.h>
#include <ndb_global.h>
#include <ndb_opts.h>
#include <NDBT.hpp>

static struct my_option my_long_options[] =
{
  NDB_STD_OPTS("eventlog"),
  { 0, 0, 0, 0, 0, 0, GET_NO_ARG, NO_ARG, 0, 0, 0, 0, 0, 0}
};

int filter[] = { 15, NDB_MGM_EVENT_CATEGORY_BACKUP,
                 15, NDB_MGM_EVENT_CATEGORY_CONNECTION,
                 15, NDB_MGM_EVENT_CATEGORY_NODE_RESTART,
                 15, NDB_MGM_EVENT_CATEGORY_STARTUP,
                 15, NDB_MGM_EVENT_CATEGORY_SHUTDOWN,
                 15, NDB_MGM_EVENT_CATEGORY_STATISTIC,
                 15, NDB_MGM_EVENT_CATEGORY_ERROR,
                 15, NDB_MGM_EVENT_CATEGORY_CHECKPOINT,
                 15, NDB_MGM_EVENT_CATEGORY_CONGESTION,
                 0 };

extern "C"
void catch_signal(int signum)
{
}

int 
main(int argc, char** argv)
{
  NDB_INIT(argv[0]);
  const char *load_default_groups[]= { "mysql_cluster",0 };
  load_defaults("my",load_default_groups,&argc,&argv);
  int ho_error;
#ifndef DBUG_OFF
  opt_debug= "d:t:O,/tmp/eventlog.trace";
#endif

#ifndef _WIN32
  // Catching signal to allow testing of EINTR safeness
  // with "while killall -USR1 eventlog; do true; done"
  signal(SIGUSR1, catch_signal);
#endif

  if ((ho_error=handle_options(&argc, &argv, my_long_options, 
                               ndb_std_get_one_option)))
    return NDBT_ProgramExit(NDBT_WRONGARGS);

  NdbMgmHandle handle= ndb_mgm_create_handle();
  ndb_mgm_set_connectstring(handle, opt_ndb_connectstring);
  
  while (true)
  {
    if (ndb_mgm_connect(handle,0,0,0) == -1)
    {
      ndbout_c("Failed to connect");
      exit(0);
    }
    
    NdbLogEventHandle le = ndb_mgm_create_logevent_handle(handle, filter);
    if (le == 0)
    {
      ndbout_c("Failed to create logevent handle");
      exit(0);
    }
    
    struct ndb_logevent event;
    while (true)
    {
      int r= ndb_logevent_get_next(le, &event,5000);
      if (r < 0)
      {
        ndbout_c("Error while getting next event");
        break;
      }
      if (r == 0)
      {
        continue;
      }
      ndbout_c("Got event: %d", event.type);
    }
    
    ndb_mgm_destroy_logevent_handle(&le);
    ndb_mgm_disconnect(handle);
  }

  return 0;
}