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///////////////////////////////////////////////////////////
/// \file
/// \brief Starter session implementation
/// Starter session will generate emtpy message to insert
/// into local session that are registered under same protocol
/// Starter (will one day) automatically adjust number
/// of message inflight to make sure that at least one of source
/// sessions within message queue is at the limit (bottle neck)
/// Maximum number of messages that starter will instert into
/// the pipeline is configured by NBus::TBusSessionConfig::MaxInFlight
#include "startsession.h"
#include "module.h"
#include <library/cpp/messagebus/ybus.h>
namespace NBus {
void* TBusStarter::_starter(void* data) {
TBusStarter* pThis = static_cast<TBusStarter*>(data);
pThis->Starter();
return nullptr;
}
TBusStarter::TBusStarter(TBusModule* module, const TBusSessionConfig& config)
: Module(module)
, Config(config)
, StartThread(_starter, this)
, Exiting(false)
{
StartThread.Start();
}
TBusStarter::~TBusStarter() {
Shutdown();
}
void TBusStarter::Shutdown() {
{
TGuard<TMutex> g(ExitLock);
Exiting = true;
ExitSignal.Signal();
}
StartThread.Join();
}
void TBusStarter::Starter() {
TGuard<TMutex> g(ExitLock);
while (!Exiting) {
TAutoPtr<TBusMessage> empty(new TBusMessage(0));
EMessageStatus status = Module->StartJob(empty);
if (Config.SendTimeout > 0) {
ExitSignal.WaitT(ExitLock, TDuration::MilliSeconds(Config.SendTimeout));
} else {
ExitSignal.WaitT(ExitLock, (status == MESSAGE_BUSY) ? TDuration::MilliSeconds(1) : TDuration::Zero());
}
}
}
}
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