/** Execute the algorithm.
*/
void MonitorLiveData::exec() {
double UpdateEvery = getProperty("UpdateEvery");
if (UpdateEvery <= 0)
throw std::runtime_error("UpdateEvery must be > 0");
// Get the listener (and start listening) as early as possible
ILiveListener_sptr listener = this->getLiveListener();
// Grab ownership of the pointer in the LOCAL listener variable.
// This will make the listener destruct if the algorithm throws,
// but the Algorithm is still in the list of "Managed" algorithms.
m_listener.reset();
// The last time we called LoadLiveData.
// Since StartLiveData _just_ called it, use the current time.
DateAndTime lastTime = DateAndTime::getCurrentTime();
m_chunkNumber = 0;
int runNumber = 0;
int prevRunNumber = 0;
std::string AccumulationWorkspace =
this->getPropertyValue("AccumulationWorkspace");
std::string OutputWorkspace = this->getPropertyValue("OutputWorkspace");
std::string NextAccumulationMethod =
this->getPropertyValue("AccumulationMethod");
// Keep going until you get cancelled
while (true) {
// Exit if the user presses cancel
this->interruption_point();
// Sleep for 50 msec
Poco::Thread::sleep(50);
DateAndTime now = DateAndTime::getCurrentTime();
double seconds = DateAndTime::secondsFromDuration(now - lastTime);
if (seconds > UpdateEvery) {
lastTime = now;
g_log.notice() << "Loading live data chunk " << m_chunkNumber << " at "
<< now.toFormattedString("%H:%M:%S") << '\n';
// Time to run LoadLiveData again
Algorithm_sptr alg = createChildAlgorithm("LoadLiveData");
LoadLiveData *loadAlg = dynamic_cast<LoadLiveData *>(alg.get());
if (!loadAlg)
throw std::runtime_error("Error creating LoadLiveData Child Algorithm");
loadAlg->setChild(true);
// So the output gets put into the ADS
loadAlg->setAlwaysStoreInADS(true);
// Too much logging
loadAlg->setLogging(false);
loadAlg->initialize();
// Copy settings from THIS to LoadAlg
loadAlg->copyPropertyValuesFrom(*this);
// Give the listener directly to LoadLiveData (don't re-create it)
loadAlg->setLiveListener(listener);
// Override the AccumulationMethod when a run ends.
loadAlg->setPropertyValue("AccumulationMethod", NextAccumulationMethod);
// Run the LoadLiveData
loadAlg->executeAsChildAlg();
NextAccumulationMethod = this->getPropertyValue("AccumulationMethod");
if (runNumber == 0) {
runNumber = listener->runNumber();
g_log.debug() << "Run number set to " << runNumber << '\n';
}
// Did we just hit a run transition?
ILiveListener::RunStatus runStatus = listener->runStatus();
if (runStatus == ILiveListener::EndRun) {
// Need to keep track of what the run number *was* so we
// can properly rename workspaces
prevRunNumber = runNumber;
}
if ((runStatus == ILiveListener::BeginRun) ||
(runStatus == ILiveListener::EndRun)) {
std::stringstream message;
message << "Run";
if (runNumber != 0)
message << " #" << runNumber;
message << " ended. ";
std::string RunTransitionBehavior =
this->getPropertyValue("RunTransitionBehavior");
if (RunTransitionBehavior == "Stop") {
g_log.notice() << message.str() << "Stopping live data monitoring.\n";
break;
} else if (RunTransitionBehavior == "Restart") {
g_log.notice() << message.str() << "Clearing existing workspace.\n";
NextAccumulationMethod = "Replace";
} else if (RunTransitionBehavior == "Rename") {
g_log.notice() << message.str() << "Renaming existing workspace.\n";
NextAccumulationMethod = "Replace";
// Now we clone the existing workspaces
std::string postFix;
if (runStatus == ILiveListener::EndRun) {
postFix = "_" + Strings::toString(runNumber);
} else {
// indicate that this is data that arrived *after* the run ended
postFix = "_";
if (prevRunNumber != 0)
postFix += Strings::toString(prevRunNumber);
postFix += "_post";
}
doClone(OutputWorkspace, OutputWorkspace + postFix);
}
runNumber = 0;
}
m_chunkNumber++;
progress(0.0, "Live Data " + Strings::toString(m_chunkNumber));
}
// This is the time to process a single chunk. Is it too long?
seconds = DateAndTime::secondsFromDuration(now - lastTime);
if (seconds > UpdateEvery)
g_log.warning() << "Cannot process live data as quickly as requested: "
"requested every " << UpdateEvery
<< " seconds but it takes " << seconds << " seconds!\n";
} // loop until aborted
// Set the outputs (only applicable when RunTransitionBehavior is "Stop")
Workspace_sptr OutputWS =
AnalysisDataService::Instance().retrieveWS<Workspace>(OutputWorkspace);
this->setProperty("OutputWorkspace", OutputWS);
if (!AccumulationWorkspace.empty()) {
Workspace_sptr AccumulationWS =
AnalysisDataService::Instance().retrieveWS<Workspace>(
AccumulationWorkspace);
this->setProperty("AccumulationWorkspace", AccumulationWS);
}
} // exec()
