source: trunk/pbs_drmaa/pbs_conn.c @ 83

/* $Id$ */
/*
 *  FedStage DRMAA for PBS Pro
 *  Copyright (C) 2006-2007  FedStage Systems
 *
 *  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, either version 3 of the License, or
 *  (at your option) any later version.
 *
 *  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, see <http://www.gnu.org/licenses/>.
 */

 #ifdef HAVE_CONFIG_H
#       include <config.h>
#endif

#include <pbs_error.h>

#include <drmaa_utils/datetime.h>
#include <drmaa_utils/drmaa.h>
#include <drmaa_utils/iter.h>
#include <drmaa_utils/conf.h>
#include <drmaa_utils/session.h>
#include <drmaa_utils/datetime.h>

#include <pbs_drmaa/pbs_conn.h>
#include <pbs_drmaa/util.h>

#include <errno.h>
#include <signal.h>
#include <unistd.h>


static char* pbsdrmaa_pbs_submit( pbsdrmaa_pbs_conn_t *self, struct attropl *attrib, char *script, char *destination );

static struct batch_status* pbsdrmaa_pbs_statjob( pbsdrmaa_pbs_conn_t *self,  char *job_id, struct attrl *attrib );

static void pbsdrmaa_pbs_statjob_free( pbsdrmaa_pbs_conn_t *self, struct batch_status* job_status );

static void pbsdrmaa_pbs_sigjob( pbsdrmaa_pbs_conn_t *self, char *job_id, char *signal );

static void pbsdrmaa_pbs_deljob( pbsdrmaa_pbs_conn_t *self,  char *job_id );

static void pbsdrmaa_pbs_rlsjob( pbsdrmaa_pbs_conn_t *self, char *job_id );

static void pbsdrmaa_pbs_holdjob( pbsdrmaa_pbs_conn_t *self,  char *job_id );

static void pbsdrmaa_pbs_reconnect_internal( pbsdrmaa_pbs_conn_t *self, bool reconnect);

static void pbsdrmaa_pbs_check_connect_internal( pbsdrmaa_pbs_conn_t *self, bool reconnect);

#define IS_TRANSIENT_ERROR (pbs_errno == PBSE_PROTOCOL || pbs_errno == PBSE_EXPIRED || pbs_errno == PBSOLDE_PROTOCOL || pbs_errno == PBSOLDE_EXPIRED)

        
pbsdrmaa_pbs_conn_t * 
pbsdrmaa_pbs_conn_new( pbsdrmaa_session_t *session, char *server )
{
        pbsdrmaa_pbs_conn_t *volatile self = NULL;

        fsd_log_enter((""));

        TRY
          {
                fsd_malloc(self, pbsdrmaa_pbs_conn_t );
                
                self->session = session;
                
                self->submit = pbsdrmaa_pbs_submit;
                self->statjob = pbsdrmaa_pbs_statjob;
                self->statjob_free = pbsdrmaa_pbs_statjob_free;
                self->sigjob = pbsdrmaa_pbs_sigjob;
                self->deljob = pbsdrmaa_pbs_deljob;
                self->rlsjob = pbsdrmaa_pbs_rlsjob;
                self->holdjob = pbsdrmaa_pbs_holdjob;

                self->server = fsd_strdup(server);

                self->connection_fd = -1;
                self->last_usage = time(NULL);

                /*ignore SIGPIPE - otherwise pbs_disconnect cause the program to exit */
                signal(SIGPIPE, SIG_IGN);       

                pbsdrmaa_pbs_reconnect_internal(self, false);
          }
        EXCEPT_DEFAULT
          {
                if( self != NULL)
                  {
                        fsd_free(self->server);
                        fsd_free(self);

                        if (self->connection_fd != -1)
                                pbs_disconnect(self->connection_fd);
                  }
                        
                fsd_exc_reraise();
          }
        END_TRY

        fsd_log_return((""));

        return self;
}


void
pbsdrmaa_pbs_conn_destroy ( pbsdrmaa_pbs_conn_t * self )
{
        fsd_log_enter((""));

        TRY
        {
                if(self != NULL)
                {
                        fsd_free(self->server);
                        fsd_free(self); 

                        if (self->connection_fd != -1)
                                pbs_disconnect(self->connection_fd);
                }
        }
        EXCEPT_DEFAULT
        {
                fsd_exc_reraise();
        }
        END_TRY
        
        fsd_log_return((""));
}

char* 
pbsdrmaa_pbs_submit( pbsdrmaa_pbs_conn_t *self, struct attropl *attrib, char *script, char *destination )
{
        char *volatile job_id = NULL;
        volatile bool first_try = true;
        volatile bool conn_lock = false;

        fsd_log_enter((""));

        TRY
         {
                conn_lock = fsd_mutex_lock(&self->session->super.drm_connection_mutex);

                pbsdrmaa_pbs_reconnect_internal(self, false);

retry:
                job_id = pbs_submit(self->connection_fd, attrib, script, destination, NULL);

                fsd_log_info(("pbs_submit(%s, %s) = %s", script, destination, job_id));

                if(job_id == NULL)
                 {
                        fsd_log_error(( "pbs_submit failed, pbs_errno = %d", pbs_errno ));
                        if (IS_TRANSIENT_ERROR && first_try)
                         {
                                pbsdrmaa_pbs_reconnect_internal(self, true);
                                first_try = false;
                                goto retry;
                         }
                        else
                         {
                                pbsdrmaa_exc_raise_pbs( "pbs_submit");
                         }
                 }
         }
        EXCEPT_DEFAULT
         {
                fsd_free(job_id);
                fsd_exc_reraise();
         }
        FINALLY
         {
                if(conn_lock)
                        conn_lock = fsd_mutex_unlock(&self->session->super.drm_connection_mutex);
         }
        END_TRY


        fsd_log_return(("%s", job_id));

        return job_id;
}

struct batch_status* 
pbsdrmaa_pbs_statjob( pbsdrmaa_pbs_conn_t *self,  char *job_id, struct attrl *attrib )
{

}

void 
pbsdrmaa_pbs_statjob_free( pbsdrmaa_pbs_conn_t *self, struct batch_status* job_status )
{


}

void 
pbsdrmaa_pbs_sigjob( pbsdrmaa_pbs_conn_t *self, char *job_id, char *signal )
{


}

void 
pbsdrmaa_pbs_deljob( pbsdrmaa_pbs_conn_t *self, char *job_id )
{

}

void 
pbsdrmaa_pbs_rlsjob( pbsdrmaa_pbs_conn_t *self, char *job_id )
{


}

void 
pbsdrmaa_pbs_holdjob( pbsdrmaa_pbs_conn_t *self,  char *job_id )
{

}

void 
pbsdrmaa_pbs_reconnect_internal( pbsdrmaa_pbs_conn_t *self, bool force_reconnect)
{
        int tries_left = self->session->max_retries_count;
        int sleep_time = 1;

        fsd_log_enter(("(%d)", self->connection_fd));

        if ( self->connection_fd != -1 ) 
          {
                if (!force_reconnect)
                  {
                        fsd_log_return(("(%d)", self->connection_fd));
                        return;
                  }
                else
                 {
                        pbs_disconnect(self->connection_fd);
                        self->connection_fd = -1;
                 }
          }

retry_connect: /* Life... */
        self->connection_fd = pbs_connect( self->server );
        fsd_log_info(( "pbs_connect(%s) =%d", self->server, self->connection_fd ));
        if( self->connection_fd < 0 && tries_left-- )
          {
                sleep(sleep_time);
                sleep_time *=2;
                goto retry_connect;
          }
        
        if( self->connection_fd < 0 )
                pbsdrmaa_exc_raise_pbs( "pbs_connect" );
        
        fsd_log_return(("(%d)", self->connection_fd));
}