bool ObjectCM::sendSync( const MasterCMCommand& command )
{
lunchbox::ScopedFastWrite mutex( _lock );
if( !_object )
{
LBWARN << "Sync from detached object requested" << std::endl;
return false;
}
const uint128_t& maxCachedVersion = command.getMaxCachedVersion();
const bool useCache =
command.useCache() &&
command.getMasterInstanceID() == _object->getInstanceID() &&
maxCachedVersion == getVersion();
if( !useCache )
{
ObjectInstanceDataOStream os( this );
os.enableSync( getVersion(), command );
_object->getInstanceData( os );
os.disable();
}
NodePtr node = command.getNode();
node->send( CMD_NODE_SYNC_OBJECT_REPLY, useCache /*preferMulticast*/ )
<< node->getNodeID() << command.getObjectID() << command.getRequestID()
<< true << command.useCache() << useCache;
return true;
}
bool ObjectCM::_initSlave( const MasterCMCommand& command,
const uint128_t& replyVersion, bool replyUseCache )
{
#if 0
LBLOG( LOG_OBJECTS ) << "Object id " << _object->_id << " v" << _version
<< ", instantiate on " << node->getNodeID()
<< std::endl;
#endif
#ifndef NDEBUG
const uint128_t& version = command.getRequestedVersion();
if( version != VERSION_OLDEST && version < replyVersion )
LBINFO << "Mapping version " << replyVersion << " instead of "
<< version << std::endl;
#endif
if( replyUseCache &&
command.getMinCachedVersion() <= replyVersion &&
command.getMaxCachedVersion() >= replyVersion )
{
#ifdef CO_INSTRUMENT_MULTICAST
++_hit;
#endif
_sendMapSuccess( command, false );
_sendMapReply( command, replyVersion, true, replyUseCache, false );
return true;
}
lunchbox::ScopedFastWrite mutex( _lock );
if( !_object )
{
LBWARN << "Map to detached object requested" << std::endl;
return false;
}
#ifdef CO_INSTRUMENT_MULTICAST
++_miss;
#endif
replyUseCache = false;
_sendMapSuccess( command, true );
// send instance data
ObjectInstanceDataOStream os( this );
os.enableMap( replyVersion, command.getNode(), command.getInstanceID( ));
_object->getInstanceData( os );
os.disable();
if( !os.hasSentData( ))
// no data, send empty command to set version
_sendEmptyVersion( command, replyVersion, true /* mc */ );
_sendMapReply( command, replyVersion, true, replyUseCache, true );
return true;
}
bool FullMasterCM::sendSync( const MasterCMCommand& command )
{
//const uint128_t& version = command.getRequestedVersion();
const uint128_t& maxCachedVersion = command.getMaxCachedVersion();
const bool useCache =
command.useCache() &&
command.getMasterInstanceID() == _object->getInstanceID() &&
maxCachedVersion == _version;
if( !useCache )
{
Mutex mutex( _slaves );
InstanceData* instanceData = _instanceDatas.back();
instanceData->os.sync( command );
}
NodePtr node = command.getNode();
node->send( CMD_NODE_SYNC_OBJECT_REPLY, useCache /*preferMulticast*/ )
<< node->getNodeID() << command.getObjectID() << command.getRequestID()
<< true << command.useCache() << useCache;
return true;
}
bool FullMasterCM::_initSlave( const MasterCMCommand& command,
const uint128_t& /*replyVersion*/,
bool replyUseCache )
{
_checkConsistency();
const uint128_t& version = command.getRequestedVersion();
const uint128_t oldest = _instanceDatas.front()->os.getVersion();
uint128_t start = (version == VERSION_OLDEST || version < oldest ) ?
oldest : version;
uint128_t end = _version;
#ifndef NDEBUG
if( version != VERSION_OLDEST && version < start )
LBINFO << "Mapping version " << start << " instead of requested "
<< version << " for " << lunchbox::className( _object )
<< " " << ObjectVersion( _object->getID(), _version ) << " of "
<< _instanceDatas.size() << "/" << _nVersions << std::endl;
#endif
const uint128_t& minCachedVersion = command.getMinCachedVersion();
const uint128_t& maxCachedVersion = command.getMaxCachedVersion();
const uint128_t replyVersion = start;
if( replyUseCache )
{
if( minCachedVersion <= start && maxCachedVersion >= start )
{
#ifdef CO_INSTRUMENT_MULTICAST
_hit += maxCachedVersion + 1 - start;
#endif
start = maxCachedVersion + 1;
}
else if( maxCachedVersion == end )
{
end = LB_MAX( start, minCachedVersion - 1 );
#ifdef CO_INSTRUMENT_MULTICAST
_hit += _version - end;
#endif
}
// TODO else cached block in the middle, send head and tail elements
}
#if 0
LBLOG( LOG_OBJECTS )
<< *_object << ", instantiate on " << node->getNodeID() << " with v"
<< ((requested == VERSION_OLDEST) ? oldest : requested) << " ("
<< requested << ") sending " << start << ".." << end << " have "
<< _version - _nVersions << ".." << _version << " "
<< _instanceDatas.size() << std::endl;
#endif
LBASSERT( start >= oldest );
bool dataSent = false;
// send all instance datas from start..end
InstanceDataDeque::iterator i = _instanceDatas.begin();
while( i != _instanceDatas.end() && (*i)->os.getVersion() < start )
++i;
for( ; i != _instanceDatas.end() && (*i)->os.getVersion() <= end; ++i )
{
if( !dataSent )
{
_sendMapSuccess( command, true );
dataSent = true;
}
InstanceData* data = *i;
LBASSERT( data );
data->os.sendMapData( command.getRemoteNode(),
command.getInstanceID( ));
#ifdef CO_INSTRUMENT_MULTICAST
++_miss;
#endif
}
if( !dataSent )
{
_sendMapSuccess( command, false );
_sendMapReply( command, replyVersion, true, replyUseCache, false );
}
else
_sendMapReply( command, replyVersion, true, replyUseCache, true );
#ifdef CO_INSTRUMENT_MULTICAST
if( _miss % 100 == 0 )
LBINFO << "Cached " << _hit << "/" << _hit + _miss
<< " instance data transmissions" << std::endl;
#endif
return true;
}