/**
* This service method stores an event in XML format in the lighthouse database. It does not
* commit the current unit of work, which has to be done by the caller.
*
* @param event the XML of the event to log.
* @throws PersistenceException in case of a database problem.
* @throws XMLSerializationException in case of a problem with the event XML.
*/
public void log(String eventXml) {
if (log.isDebugEnabled()) log.debug("Logging the following event XML : " + eventXml);
if (eventXml.getBytes().length >= EVENT_SIZE_LIMIT) {
log.warn(
"Log message exceeds maximum allowed log message size of "
+ EVENT_SIZE_LIMIT
+ " Byte. Message will be discarded.");
}
Event eventToLog = new Event();
int retries = 3;
while (true) {
try {
try {
eventToLog.fromXml(eventXml, this.deploymentRegistry, this.softwareComponentRegistry);
} catch (XMLSerializationException ex) {
log.error("Could not parse event to log:\n" + eventXml + "\n", ex);
throw ex;
} catch (UnknownContextException unknownContextException) {
if (log.isDebugEnabled()) {
log.debug("Event could not be parsed due to unknown context: " + eventXml);
}
if (autoDeployUnknownEvents) {
createContextForEvent(eventXml);
eventToLog.fromXml(eventXml, this.deploymentRegistry, this.softwareComponentRegistry);
} else {
log.error("Could not parse event to log:\n" + eventXml + "\n", unknownContextException);
throw new XMLSerializationException(
unknownContextException.getMessage(), unknownContextException);
}
}
this.log(eventToLog);
if (log.isDebugEnabled()) {
log.debug("Logged event XML");
}
break;
} catch (Throwable ex) {
log.warn("Failed to persist event: " + eventXml, ex);
eventRegistry.getUnitOfWork().rollback();
if (--retries == 0) {
break;
}
}
}
}
/** Perform event filter registration. */
public void run() {
if (log.isDebugEnabled()) {
log.debug("Registering event filter " + this.eventFilter.toString());
log.debug("Looking up matching past events in registry");
}
hibernateEventRegistry = (EventRegistry) getEventRegistry();
unitOfWork = hibernateEventRegistry.getUnitOfWork();
List<Event> matchesInRegistry =
hibernateEventRegistry.findByTemplate(this.eventFilter.getTemplate());
if (log.isDebugEnabled())
log.debug("Matching past events found in registry, publishing them");
List<Event> pastEventNotificationBatch = new ArrayList<Event>();
for (Event match : matchesInRegistry) {
if (!this.registrationHasBeenCanceled()) {
pastEventNotificationBatch.add(match);
if (pastEventNotificationBatch.size() % getPastEventNotificationBatchSize() == 0) {
this.eventLoggerService
.getEventFilterMatchHandler()
.handleMatches(this.eventFilter, pastEventNotificationBatch);
pastEventNotificationBatch.clear();
}
} else {
if (log.isDebugEnabled())
log.debug("Event filter has been deregistered. Stopping processing");
unitOfWork.rollback();
return;
}
}
if (!pastEventNotificationBatch.isEmpty())
this.eventLoggerService
.getEventFilterMatchHandler()
.handleMatches(this.eventFilter, pastEventNotificationBatch);
this.eventLoggerService.getEventRegistry().getUnitOfWork().rollback();
if (log.isDebugEnabled())
log.debug("Matching past events published, now registering filter for live events");
boolean performedLiveEventFilterRegistration = false;
if (!this.registrationHasBeenCanceled()) {
this.eventLoggerService.registerFilterForLiveEvents(this.eventFilter);
performedLiveEventFilterRegistration = true;
} else {
if (log.isDebugEnabled())
log.debug("Event filter has been deregistered. Not registering for live events anymore.");
unitOfWork.rollback();
return;
}
if (this.registrationHasBeenCanceled() && performedLiveEventFilterRegistration) {
if (log.isDebugEnabled())
log.debug(
"Event filter has been deregistered while registering for live events. Deregistering again for safety reasons.");
this.eventLoggerService.deregisterEventFilter(this.eventFilter.getUuid());
}
this.eventLoggerService.handlerFinishedEventRegistration(this.eventFilter.getUuid());
if (log.isDebugEnabled()) log.debug("Event filter registered for live events.");
unitOfWork.rollback();
}
