use of org.ballerinalang.siddhi.core.util.Scheduler in project ballerina by ballerina-lang.
the class Window method init.
/**
* Initialize the WindowEvent table by creating {@link WindowProcessor} to handle the events.
*
* @param tableMap map of {@link Table}s
* @param eventWindowMap map of EventWindows
* @param queryName name of the query window belongs to.
*/
public void init(Map<String, Table> tableMap, Map<String, Window> eventWindowMap, String queryName) {
if (this.windowProcessor != null) {
return;
}
// Create and initialize MetaStreamEvent
MetaStreamEvent metaStreamEvent = new MetaStreamEvent();
metaStreamEvent.addInputDefinition(windowDefinition);
metaStreamEvent.setEventType(MetaStreamEvent.EventType.WINDOW);
metaStreamEvent.initializeAfterWindowData();
for (Attribute attribute : windowDefinition.getAttributeList()) {
metaStreamEvent.addOutputData(attribute);
}
this.streamEventPool = new StreamEventPool(metaStreamEvent, 5);
StreamEventCloner streamEventCloner = new StreamEventCloner(metaStreamEvent, this.streamEventPool);
OutputStream.OutputEventType outputEventType = windowDefinition.getOutputEventType();
boolean outputExpectsExpiredEvents = outputEventType != OutputStream.OutputEventType.CURRENT_EVENTS;
WindowProcessor internalWindowProcessor = (WindowProcessor) SingleInputStreamParser.generateProcessor(windowDefinition.getWindow(), metaStreamEvent, new ArrayList<VariableExpressionExecutor>(), this.siddhiAppContext, tableMap, false, outputExpectsExpiredEvents, queryName);
internalWindowProcessor.setStreamEventCloner(streamEventCloner);
internalWindowProcessor.constructStreamEventPopulater(metaStreamEvent, 0);
EntryValveProcessor entryValveProcessor = null;
if (internalWindowProcessor instanceof SchedulingProcessor) {
entryValveProcessor = new EntryValveProcessor(this.siddhiAppContext);
Scheduler scheduler = SchedulerParser.parse(this.siddhiAppContext.getScheduledExecutorService(), entryValveProcessor, this.siddhiAppContext);
scheduler.init(this.lockWrapper, queryName);
scheduler.setStreamEventPool(streamEventPool);
((SchedulingProcessor) internalWindowProcessor).setScheduler(scheduler);
}
if (entryValveProcessor != null) {
entryValveProcessor.setToLast(internalWindowProcessor);
this.windowProcessor = entryValveProcessor;
} else {
this.windowProcessor = internalWindowProcessor;
}
// StreamPublishProcessor must be the last in chain so that it can publish the events to StreamJunction
this.windowProcessor.setToLast(new StreamPublishProcessor(outputEventType));
this.internalWindowProcessor = internalWindowProcessor;
}
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