int callSyncRPCRemote(const char *hostname,
uint16_t port,
const char *sendbuff,
int sendbuffsize,
uint16_t sendmsgid,
uint16_t exprecvmsgid,
SelfMaintainBuffer recvsmb)
{
int fd = -1;
int res = FUNC_RETURN_OK;
AsyncCommBuffer newcommbuffer = NULL;
AsyncCommMessageHandlerContext context = NULL;
SyncRPCContextData userdata;
/* Connect to the server side. */
res = connectToServerRemote(hostname, port, &fd);
if ( res != FUNC_RETURN_OK ) {
elog(WARNING, "Fail to connect to socket server %s:%d, result %d",
hostname, port,
res);
goto exit;
}
initializeSyncRPContent(&userdata, recvsmb, exprecvmsgid);
context = createMessageHandlerContext(&userdata);
res = registerFileDesc(fd,
NULL,
ASYNCCOMM_READBYTES | ASYNCCOMM_WRITEBYTES,
&AsyncCommBufferHandlersMessage,
context,
&newcommbuffer);
if ( res != FUNC_RETURN_OK )
{
rm_pfree(AsyncCommContext, context);
elog(WARNING, "Fail to register FD for synchronous communication. %d", res);
goto exit;
}
buildMessageToCommBuffer(newcommbuffer,
sendbuff,
sendbuffsize,
sendmsgid,
0,
0);
context->AsyncBuffer = newcommbuffer;
InitHandler_Message(newcommbuffer);
/* Wait for the complete of the communication. */
while( true )
{
processAllCommFileDescs();
if ( userdata.CommStatus == SYNC_RPC_COMM_IDLE )
{
break;
}
else if ( QueryCancelPending )
{
/*
* We find that this QD wants to cancel the query, we don't need
* to continue the communication.
*/
res = TRANSCANCEL_INPROGRESS;
break;
}
}
res = res == TRANSCANCEL_INPROGRESS ? res : userdata.Result;
/* Close and cleanup */
closeAndRemoveAllRegisteredFileDesc();
if (res != FUNC_RETURN_OK)
{
elog(WARNING, "Sync RPC framework (inet) finds exception raised.");
}
return res;
exit:
closeConnectionRemote(&fd);
return res;
}
int callSyncRPCRemote(const char *hostname,
uint16_t port,
const char *sendbuff,
int sendbuffsize,
uint16_t sendmsgid,
uint16_t exprecvmsgid,
SelfMaintainBuffer recvsmb,
char *errorbuf,
int errorbufsize)
{
int fd = -1;
int res = FUNC_RETURN_OK;
AsyncCommBuffer newcommbuffer = NULL;
AsyncCommMessageHandlerContext context = NULL;
SyncRPCContextData userdata;
/* Connect to the server side. */
res = connectToServerRemote(hostname, port, &fd);
if ( res != FUNC_RETURN_OK )
{
snprintf(errorbuf, errorbufsize,
"failed to connect to remote socket server %s:%d",
hostname,
port);
elog(WARNING, "%s", errorbuf);
goto exit;
}
initializeSyncRPContent(&userdata, recvsmb, exprecvmsgid);
context = createMessageHandlerContext(&userdata);
res = registerFileDesc(fd,
NULL,
ASYNCCOMM_READBYTES | ASYNCCOMM_WRITEBYTES,
&AsyncCommBufferHandlersMessage,
context,
&newcommbuffer);
if ( res != FUNC_RETURN_OK )
{
rm_pfree(AsyncCommContext, context);
snprintf(errorbuf, errorbufsize,
"failed to register socket connection fd %d connected to %s:%d "
"for resource rpc communication",
fd,
hostname, port);
elog(WARNING, "%s", errorbuf);
goto exit;
}
buildMessageToCommBuffer(newcommbuffer,
sendbuff,
sendbuffsize,
sendmsgid,
0,
0);
context->AsyncBuffer = newcommbuffer;
InitHandler_Message(newcommbuffer);
/* Wait for the complete of the communication. */
while( true )
{
processAllCommFileDescs();
if ( userdata.CommStatus == SYNC_RPC_COMM_IDLE )
{
break;
}
else if ( QueryCancelPending )
{
/*
* We find that this QD wants to cancel the query, we don't need
* to continue the communication.
*/
res = TRANSCANCEL_INPROGRESS;
break;
}
}
res = res == TRANSCANCEL_INPROGRESS ? res : userdata.Result;
/* Close and cleanup */
closeAndRemoveAllRegisteredFileDesc();
if (res != FUNC_RETURN_OK)
{
elog(WARNING, "Sync RPC framework (inet) finds exception raised.");
switch(res)
{
case COMM2RM_CLIENT_FAIL_SEND:
snprintf(errorbuf, errorbufsize, "failed to send content");
break;
case COMM2RM_CLIENT_FAIL_RECV:
snprintf(errorbuf, errorbufsize, "failed to receive content");
break;
case REQUESTHANDLER_WRONGMESSAGE:
snprintf(errorbuf, errorbufsize, "wrong message was received");
break;
default:
Assert(false);
}
}
return res;
exit:
elog(LOG, "Close fd %d at once", fd);
closeConnectionRemote(&fd);
return res;
}
