/*
* *************************************************************************************
* Copyright (C) 2008 EsperTech, Inc. All rights reserved. *
* http://esper.codehaus.org *
* 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.core.context.activator;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.client.EventType;
import com.espertech.esper.core.context.util.AgentInstanceContext;
import com.espertech.esper.core.service.EPServicesContext;
import com.espertech.esper.core.service.EPStatementHandleCallback;
import com.espertech.esper.filter.FilterHandleCallback;
import com.espertech.esper.filter.FilterSpecCompiled;
import com.espertech.esper.filter.FilterValueSet;
import com.espertech.esper.filter.FilterValueSetParam;
import com.espertech.esper.metrics.instrumentation.InstrumentationAgent;
import com.espertech.esper.metrics.instrumentation.InstrumentationHelper;
import com.espertech.esper.view.EventStream;
import com.espertech.esper.view.ZeroDepthStream;
import com.espertech.esper.view.stream.EventStreamProxy;
import java.lang.annotation.Annotation;
import java.util.Collection;
public class ViewableActivatorFilterProxy implements ViewableActivator {
private final EPServicesContext services;
private final FilterSpecCompiled filterSpec;
private final Annotation annotations[];
private final boolean isSubSelect;
private final InstrumentationAgent instrumentationAgent;
public ViewableActivatorFilterProxy(EPServicesContext services, FilterSpecCompiled filterSpec, Annotation[] annotations, boolean subSelect, InstrumentationAgent instrumentationAgent) {
this.services = services;
this.filterSpec = filterSpec;
this.annotations = annotations;
isSubSelect = subSelect;
this.instrumentationAgent = instrumentationAgent;
}
public ViewableActivationResult activate(final AgentInstanceContext agentInstanceContext, boolean isSubselect, boolean isRecoveringResilient) {
// New event stream
EventType resultEventType = filterSpec.getResultEventType();
EventStream zeroDepthStream = new ZeroDepthStream(resultEventType);
// audit proxy
EventStream inputStream = EventStreamProxy.getAuditProxy(agentInstanceContext.getStatementContext().getEngineURI(), agentInstanceContext.getEpStatementAgentInstanceHandle().getStatementHandle().getStatementName(), annotations, filterSpec, zeroDepthStream);
final EventStream eventStream = inputStream;
final String statementId = agentInstanceContext.getStatementContext().getStatementId();
FilterHandleCallback filterCallback;
if (filterSpec.getOptionalPropertyEvaluator() != null)
{
filterCallback = new FilterHandleCallback()
{
public String getStatementId()
{
return statementId;
}
public void matchFound(EventBean theEvent, Collection<FilterHandleCallback> allStmtMatches)
{
EventBean[] result = filterSpec.getOptionalPropertyEvaluator().getProperty(theEvent, agentInstanceContext);
if (result == null)
{
return;
}
eventStream.insert(result);
}
public boolean isSubSelect()
{
return isSubSelect;
}
};
}
else
{
filterCallback = new FilterHandleCallback()
{
public String getStatementId()
{
return statementId;
}
public void matchFound(EventBean theEvent, Collection<FilterHandleCallback> allStmtMatches)
{
if (InstrumentationHelper.ENABLED) { instrumentationAgent.indicateQ();}
eventStream.insert(theEvent);
if (InstrumentationHelper.ENABLED) { instrumentationAgent.indicateA();}
}
public boolean isSubSelect()
{
return isSubSelect;
}
};
}
EPStatementHandleCallback filterHandle = new EPStatementHandleCallback(agentInstanceContext.getEpStatementAgentInstanceHandle(), filterCallback);
FilterValueSetParam[] addendum = null;
if (agentInstanceContext.getAgentInstanceFilterProxy() != null) {
addendum = agentInstanceContext.getAgentInstanceFilterProxy().getAddendumFilters(filterSpec);
}
FilterValueSet filterValueSet = filterSpec.getValueSet(null, agentInstanceContext, addendum);
services.getFilterService().add(filterValueSet, filterHandle);
ViewableActivatorFilterProxyStopCallback stopCallback = new ViewableActivatorFilterProxyStopCallback(this, filterHandle);
return new ViewableActivationResult(inputStream, stopCallback, null, null, false, false);
}
public EPServicesContext getServices() {
return services;
}
}