/*
***************************************************************************************
* Copyright (C) 2006 EsperTech, Inc. All rights reserved. *
* http://www.espertech.com/esper *
* http://www.espertech.com *
* ---------------------------------------------------------------------------------- *
* The software in this package is published under the terms of the GPL license *
* a copy of which has been included with this distribution in the license.txt file. *
***************************************************************************************
*/
package com.espertech.esper.epl.named;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.client.EventType;
import com.espertech.esper.collection.ArrayEventIterator;
import com.espertech.esper.collection.OneEventCollection;
import com.espertech.esper.epl.expression.core.ExprEvaluatorContext;
import com.espertech.esper.epl.lookup.SubordWMatchExprLookupStrategy;
import com.espertech.esper.epl.metric.MetricReportingPath;
import com.espertech.esper.epl.spec.OnTriggerType;
import com.espertech.esper.event.EventBeanUtility;
import com.espertech.esper.metrics.instrumentation.InstrumentationHelper;
import java.util.Iterator;
import java.util.List;
/**
* View for the on-delete statement that handles removing events from a named window.
*/
public class NamedWindowOnMergeView extends NamedWindowOnExprBaseView {
private final NamedWindowOnMergeViewFactory parent;
private EventBean[] lastResult;
public NamedWindowOnMergeView(SubordWMatchExprLookupStrategy lookupStrategy, NamedWindowRootViewInstance rootView, ExprEvaluatorContext exprEvaluatorContext, NamedWindowOnMergeViewFactory parent) {
super(lookupStrategy, rootView, exprEvaluatorContext);
this.parent = parent;
}
public void handleMatching(EventBean[] triggerEvents, EventBean[] matchingEvents) {
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().qInfraOnAction(OnTriggerType.ON_MERGE, triggerEvents, matchingEvents);
}
OneEventCollection newData = new OneEventCollection();
OneEventCollection oldData = null;
EventBean[] eventsPerStream = new EventBean[3]; // first:named window, second: trigger, third:before-update (optional)
if ((matchingEvents == null) || (matchingEvents.length == 0)) {
List<NamedWindowOnMergeMatch> unmatched = parent.getNamedWindowOnMergeHelper().getUnmatched();
for (EventBean triggerEvent : triggerEvents) {
eventsPerStream[1] = triggerEvent;
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().qInfraMergeWhenThens(false, triggerEvent, unmatched.size());
}
int count = -1;
for (NamedWindowOnMergeMatch action : unmatched) {
count++;
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().qInfraMergeWhenThenItem(false, count);
}
if (!action.isApplies(eventsPerStream, super.getExprEvaluatorContext())) {
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().aInfraMergeWhenThenItem(false, false);
}
continue;
}
action.apply(null, eventsPerStream, newData, oldData, super.getExprEvaluatorContext());
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().aInfraMergeWhenThenItem(false, true);
}
break; // apply no other actions
}
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().aInfraMergeWhenThens(false);
}
}
} else {
// handle update/
oldData = new OneEventCollection();
List<NamedWindowOnMergeMatch> matched = parent.getNamedWindowOnMergeHelper().getMatched();
for (EventBean triggerEvent : triggerEvents) {
eventsPerStream[1] = triggerEvent;
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().qInfraMergeWhenThens(true, triggerEvent, matched.size());
}
for (EventBean matchingEvent : matchingEvents) {
eventsPerStream[0] = matchingEvent;
int count = -1;
for (NamedWindowOnMergeMatch action : matched) {
count++;
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().qInfraMergeWhenThenItem(true, count);
}
if (!action.isApplies(eventsPerStream, super.getExprEvaluatorContext())) {
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().aInfraMergeWhenThenItem(true, false);
}
continue;
}
action.apply(matchingEvent, eventsPerStream, newData, oldData, super.getExprEvaluatorContext());
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().aInfraMergeWhenThenItem(true, true);
}
break; // apply no other actions
}
}
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().aInfraMergeWhenThens(true);
}
}
}
if (!newData.isEmpty() || (oldData != null && !oldData.isEmpty())) {
if ((MetricReportingPath.isMetricsEnabled) && (parent.getCreateNamedWindowMetricHandle().isEnabled()) && !newData.isEmpty()) {
parent.getMetricReportingService().accountTime(parent.getCreateNamedWindowMetricHandle(), 0, 0, newData.toArray().length);
}
// Events to delete are indicated via old data
// The on-merge listeners receive the events deleted, but only if there is interest
if (parent.getStatementResultService().isMakeNatural()) {
EventBean[] eventsPerStreamNaturalNew = newData.isEmpty() ? null : newData.toArray();
EventBean[] eventsPerStreamNaturalOld = (oldData == null || oldData.isEmpty()) ? null : oldData.toArray();
this.rootView.update(EventBeanUtility.denaturalize(eventsPerStreamNaturalNew), EventBeanUtility.denaturalize(eventsPerStreamNaturalOld));
updateChildren(eventsPerStreamNaturalNew, eventsPerStreamNaturalOld);
} else {
EventBean[] eventsPerStreamNew = newData.isEmpty() ? null : newData.toArray();
EventBean[] eventsPerStreamOld = (oldData == null || oldData.isEmpty()) ? null : oldData.toArray();
this.rootView.update(eventsPerStreamNew, eventsPerStreamOld);
if (parent.getStatementResultService().isMakeSynthetic()) {
updateChildren(eventsPerStreamNew, eventsPerStreamOld);
}
}
}
// Keep the last delete records
lastResult = matchingEvents;
if (InstrumentationHelper.ENABLED) {
InstrumentationHelper.get().aInfraOnAction();
}
}
public EventType getEventType() {
return rootView.getEventType();
}
public Iterator<EventBean> iterator() {
return new ArrayEventIterator(lastResult);
}
}