int MAMACALLTYPE
mamaQueue_pollQueueSizeCb (void* closure)
{
size_t count = 0;
mamaQueue queue = (mamaQueue)closure;
mamaQueue_getEventCount (queue, &count);
return count;
}
bool UPAConsumer::PumpQueueEvents()
{
// before we do anything else, process any pending subscriptions
owner_->ProcessPendingSubcriptions();
// Now dispatch any incoming events from the mama queue
size_t numEvents = 0;
mama_status status = mamaQueue_getEventCount(requestQueue_, &numEvents);
if ((status == MAMA_STATUS_OK) && (numEvents > 0))
{
// although we only really want to throttle subscriptions, for simplicity throttle everything here.
size_t eventsDispatched = 0;
// so keep dispatching while there are events on the queue, we haven't hit the max per cycle
//and we haven't hit the max pending limit
while ((numEvents > eventsDispatched)
&& (eventsDispatched < maxDispatchesPerCycle_)
&& (StreamManager().countPendingItems() < maxPendingOpens_))
{
if (!runThread_)
{
return false;
}
mamaQueue_dispatchEvent(requestQueue_);
++eventsDispatched;
}
t42log_debug("dispatched %d requests \n", eventsDispatched);
}
// This MUST be outside the loop as there may be no further events when the final items
// are opened
statsLogger_->SetPendingOpens((int)StreamManager().countPendingItems());
statsLogger_->SetPendingCloses((int)StreamManager().PendingCloses());
statsLogger_->SetOpenItems((int)StreamManager().OpenItems());
statsLogger_->SetRequestQueueLength((int)numEvents);
return true;
}
void UPAProvider::Run()
{
struct timeval time_interval;
RsslRet retval = 0;
fd_set useRead;
fd_set useExcept;
fd_set useWrt;
// prime the counter for ping checking
lastPingCheck_ = utils::time::GetMilliCount();
FD_ZERO(&readfds_);
FD_ZERO(&exceptfds_);
FD_ZERO(&wrtfds_);
RsslError error;
if (!Bind(portno_, &error))
{
t42log_error("Unable to start provider thread, bind return error %d ('%s') \n",error.sysError, error.text);
return;
}
while(runThread_ == true)
{
useRead = readfds_;
useExcept = exceptfds_;
useWrt = wrtfds_;
time_interval.tv_sec = selTimeoutSec;
time_interval.tv_usec = selTimeoutUSec;
// now process any queued publish events
size_t numEvents = 0;
size_t maxDispatchesPerCycle = 50;
size_t maxPendingOpens = 500;
mama_status status = mamaQueue_getEventCount(requestQueue_, &numEvents);
if ((status == MAMA_STATUS_OK) && (numEvents > 0))
{
// although we only really want to throttle subscriptions, for simplicity throttle everything here.
size_t eventsDispatched = 0;
// so keep dispatching while there are events on the queue, we haven t hit the mac per cycle and we havent hit the max pending limit
while (numEvents > eventsDispatched && eventsDispatched < maxDispatchesPerCycle )
{
mamaQueue_dispatchEvent(requestQueue_);
++eventsDispatched;
}
t42log_info("dispatched %d requests \n", eventsDispatched);
}
int selRet = select(FD_SETSIZE,&useRead, &useWrt,&useExcept,&time_interval);
if (selRet == 0)
{
// timed out, no messages received so publish from queue
}
else if ( selRet > 0)
{
// read from the socket
if ((rsslServer_ != NULL) && (rsslServer_->socketId != -1) && (FD_ISSET(rsslServer_->socketId,&useRead)))
{
// this is on the listening socket (rsslServer_->socketId)
CreateNewClientConnection();
}
// so now read on all the channels
for( int index = 0; index < maxClientConnections; index ++)
{
if ((clientConnections_[index].clientChannel != NULL) && (clientConnections_[index].clientChannel->socketId != -1))
{
// theres a connection on this index so check the FDs
if ((FD_ISSET(clientConnections_[index].clientChannel->socketId, &useRead)) || (FD_ISSET(clientConnections_[index].clientChannel->socketId, &useExcept)))
{
// Theres something to read
ReadFromChannel(clientConnections_[index].clientChannel);
}
// The UPA provider sample ties these 2 conditions together but the problem then is that the
// ping initialization does happen until there is something to write (the write fd is set) and
// there is no guarantee when that will happen. So here we check for active state on the channel
// and whether the ping settings have been initialized before we check the write fd. Seems safer.
if (clientConnections_[index].clientChannel != NULL && clientConnections_[index].clientChannel->state == RSSL_CH_STATE_ACTIVE)
{
// if we havent set the ping times already (and the channel is now active) set them from the channel settings
if (clientConnections_[index].pingsInitialized != RSSL_TRUE)
{
InitChannelPingTimes(&clientConnections_[index]);
t42log_debug("Using %d as pingTimeout for Channel %d\n", clientConnections_[index].clientChannel->pingTimeout,clientConnections_[index].clientChannel->socketId);
}
// if there is something to write and the channel is active thne flush the write socket
if (clientConnections_[index].clientChannel != NULL && FD_ISSET(clientConnections_[index].clientChannel->socketId, &useWrt))
{
if ((retval = rsslFlush(clientConnections_[index].clientChannel, &error)) < RSSL_RET_SUCCESS)
{
// the write failed. Kill the connection
t42log_error("rsslFlush() failed with return code %d - <%s>\n", retval, error.text);
RemoveChannelConnection(clientConnections_[index].clientChannel);
}
else if (retval == RSSL_RET_SUCCESS)
{
// clear the write fd
FD_CLR(clientConnections_[index].clientChannel->socketId, &wrtfds_);
}
}
}
// if there is something to write and the channel is active thne flush the write socket
if (clientConnections_[index].clientChannel != NULL && FD_ISSET(clientConnections_[index].clientChannel->socketId, &useWrt) &&
clientConnections_[index].clientChannel->state == RSSL_CH_STATE_ACTIVE)
{
// if we havent set the ping times already (and the channel is now active) set them from the channel settings
if (clientConnections_[index].pingsInitialized != RSSL_TRUE)
{
InitChannelPingTimes(&clientConnections_[index]);
t42log_debug("Using %d as pingTimeout for Channel %d\n", clientConnections_[index].clientChannel->pingTimeout,clientConnections_[index].clientChannel->socketId);
}
if ((retval = rsslFlush(clientConnections_[index].clientChannel, &error)) < RSSL_RET_SUCCESS)
{
// the write failed. Kill the connection
t42log_error("rsslFlush() failed with return code %d - <%s>\n", retval, error.text);
RemoveChannelConnection(clientConnections_[index].clientChannel);
}
else if (retval == RSSL_RET_SUCCESS)
{
// clear the write fd
FD_CLR(clientConnections_[index].clientChannel->socketId, &wrtfds_);
}
}
}
}
}
else
{
// handle error
#ifdef _WIN32
if (WSAGetLastError() == WSAEINTR)
{
continue;
}
else
{
t42log_error("select() failed with error code %d\n", WSAGetLastError());
break;
}
#else
if (errno == EINTR)
{
continue;
}
else
{
t42log_error("select() failed with error code %d\n", errno);
break;
}
#endif
}
HandlePings();
}
}
