/**************************************************************************************
* 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.start;
import com.espertech.esper.client.EPException;
import com.espertech.esper.client.EventBean;
import com.espertech.esper.core.context.util.AgentInstanceContext;
import com.espertech.esper.core.service.StatementAgentInstanceLock;
import com.espertech.esper.epl.core.ResultSetProcessor;
import com.espertech.esper.epl.core.ResultSetProcessorFactoryDesc;
import com.espertech.esper.epl.core.SelectExprProcessor;
import com.espertech.esper.epl.expression.ExprEvaluatorContext;
import com.espertech.esper.epl.named.NamedWindowProcessorInstance;
public class EPPreparedExecuteSingleStreamExecInsert implements EPPreparedExecuteSingleStreamExec
{
private final ExprEvaluatorContext exprEvaluatorContext;
private final SelectExprProcessor insertHelper;
public EPPreparedExecuteSingleStreamExecInsert(ExprEvaluatorContext exprEvaluatorContext, SelectExprProcessor insertHelper) {
this.exprEvaluatorContext = exprEvaluatorContext;
this.insertHelper = insertHelper;
}
public EventBean[] execute(NamedWindowProcessorInstance instance) {
EventBean event = insertHelper.process(new EventBean[0], true, true, exprEvaluatorContext);
EventBean[] inserted = new EventBean[] {event};
AgentInstanceContext ctx = instance.getTailViewInstance().getAgentInstanceContext();
StatementAgentInstanceLock ailock = ctx.getAgentInstanceLock();
ailock.acquireWriteLock(null);
try {
instance.getRootViewInstance().update(inserted, null);
}
catch (EPException ex) {
instance.getRootViewInstance().update(null, inserted);
}
finally {
ailock.releaseWriteLock(null);
}
return inserted;
}
}