/* Function : onLeaderVersion
* Arguments : stream - socket, through which the data is received and sent
* Description: handler of REPLICATION_LEADER_VERSION command; comparing the
* received version to the local one and downloading the replica
* from the remote replication daemon when the received version is
* better than the local one and there is no downloading
* 'condor_transferer' running at the same time
*/
void
ReplicatorStateMachine::onLeaderVersion( Stream* stream )
{
dprintf( D_ALWAYS, "ReplicatorStateMachine::onLeaderVersion started\n" );
if( m_state != BACKUP ) {
return ;
}
checkVersionSynchronization( );
Version* newVersion = decodeVersionAndState( stream );
// comparing the received version to the local one
bool downloadNeeded = replicaSelectionHandler( *newVersion );
// downloading the replica from the remote replication daemon, when the
// received version is better and there is no running downloading
// 'condor_transferers'
if( downloadTransferersNumber( ) == 0 && newVersion && downloadNeeded ) {
dprintf( D_FULLDEBUG, "ReplicatorStateMachine::onLeaderVersion "
"downloading from %s\n",
newVersion->getSinfulString( ).Value( ) );
download( newVersion->getSinfulString( ).Value( ) );
}
// replication leader must not send a version which hasn't been updated
//assert(downloadNeeded);
//REPLICATION_ASSERT(downloadNeeded);
delete newVersion;
}
/* Function : versionRequestingTimer
* Description: timer, expiration of which means stopping collecting the pool
* versions in VERSION_REQUESTING state, passing to
* VERSION_DOWNLOADING state and starting downloading from the
* machine with the best version
*/
void
ReplicatorStateMachine::versionRequestingTimer( )
{
dprintf( D_ALWAYS,
"ReplicatorStateMachine::versionRequestingTimer started\n" );
utilCancelTimer(m_versionRequestingTimerId);
dprintf( D_FULLDEBUG, "ReplicatorStateMachine::versionRequestingTimer "
"cancelling version requesting timer\n" );
m_state = VERSION_DOWNLOADING;
// selecting the best version amongst all the versions that have been sent
// by other replication daemons
Version updatedVersion;
if( replicaSelectionHandler( updatedVersion ) ) {
download( updatedVersion.getSinfulString( ).Value( ) );
dprintf( D_FULLDEBUG, "ReplicatorStateMachine::versionRequestingTimer "
"registering version downloading timer\n" );
m_versionDownloadingTimerId = daemonCore->Register_Timer(
m_maxTransfererLifeTime,
(TimerHandlercpp) &ReplicatorStateMachine::versionDownloadingTimer,
"Time to pass to BACKUP state", this );
} else {
versionDownloadingTimer( );
}
}
