bool ExpandableBlockStreamExchange::open(const PartitionOffset& partition_off){
if(sem_open_.try_wait()){
nexhausted_lowers=0;
nlowers=state.lower_ip_list.size();
for(unsigned i=0;i<nlowers;i++){
received_block[i]=0;
}
socket_fd_lower_list=new int[nlowers];
// lower_ip_array=new std::string[nlowers];
buffer=new BlockStreamBuffer(state.block_size,nlowers*10,state.schema);
received_block_stream_=BlockStreamBase::createBlock(state.schema,state.block_size);
block_for_socket_=new BlockReadableFix(received_block_stream_->getSerializedBlockSize(),state.schema);
if(PrepareTheSocket()==false)
return false;
if(RegisterExchange()==false){
Logging_ExchangeIteratorEager("Register Exchange with ID=%l fails!",state.exchange_id);
}
if(isMaster()){
Logging_ExchangeIteratorEager("This exchange is the master one, serialize the iterator subtree to the children...");
if(SerializeAndSendToMulti()==false)
return false;
}
if(WaitForConnectionFromLowerExchanges()==false){
return false;
}
if(CreateReceiverThread()==false){
return false;
}
open_finished_=true;
return true;
}
else{
while(!open_finished_){
usleep(1);
}
return true;
}
}
bool ExpandableBlockStreamExchangeMaterialized::open(const PartitionOffset& part_off){
if(sem_open_.try_wait()){
nexhausted_lowers_=0;
received_block_stream_=BlockStreamBase::createBlock(state_.schema_,state_.block_size_);
block_for_socket_=new BlockReadableFix(received_block_stream_->getSerializedBlockSize(),state_.schema_);
buffer=new BlockStreamBuffer(state_.block_size_,nlowers_*10,state_.schema_);
if(PrepareTheSocket()==false)
return false;
if(RegisterExchange(ExchangeID(state_.exchange_id_,0))==false){
Logging_ExpandableBlockStreamExchangeMaterialized("Register Exchange with ID=%l fails!",state_.exchange_id_);
}
if(isMaster()){
Logging_ExpandableBlockStreamExchangeMaterialized("This exchange is the master one, serialize the iterator subtree to the children...");
if(SerializeAndSendToMulti()==false)
return false;
}
if(WaitForConnectionFromLowerExchanges()==false){
return false;
}
if(pthread_create(&receiver_tid,NULL,receiver,this)!=0){
Logging_ExpandableBlockStreamExchangeMaterialized("Failed to create receiver thread.");
return false;
}
open_finished_=true;
return true;
}
else{
while(!open_finished_){
usleep(1);
}
return true;
}
}
