/**************************************************************************************
* 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.context.ContextPartitionSelector;
import com.espertech.esper.client.context.ContextPartitionSelectorAll;
import com.espertech.esper.core.context.mgr.ContextManagementService;
import com.espertech.esper.core.context.mgr.ContextManager;
import com.espertech.esper.epl.expression.ExprValidationException;
import com.espertech.esper.epl.named.NamedWindowProcessor;
import com.espertech.esper.epl.spec.NamedWindowConsumerStreamSpec;
import com.espertech.esper.epl.spec.StatementSpecCompiled;
import java.util.Collection;
/**
* Starts and provides the stop method for EPL statements.
*/
public class EPPreparedExecuteMethodHelper
{
protected static void validateFAFQuery(StatementSpecCompiled statementSpec) throws ExprValidationException
{
if (statementSpec.getSubSelectExpressions().length > 0)
{
throw new ExprValidationException("Subqueries are not a supported feature of on-demand queries");
}
for (int i = 0; i < statementSpec.getStreamSpecs().length; i++)
{
if (!(statementSpec.getStreamSpecs()[i] instanceof NamedWindowConsumerStreamSpec))
{
throw new ExprValidationException("On-demand queries require named windows and do not allow event streams or patterns");
}
if (statementSpec.getStreamSpecs()[i].getViewSpecs().length != 0)
{
throw new ExprValidationException("Views are not a supported feature of on-demand queries");
}
}
if (statementSpec.getOutputLimitSpec() != null)
{
throw new ExprValidationException("Output rate limiting is not a supported feature of on-demand queries");
}
if (statementSpec.getInsertIntoDesc() != null)
{
throw new ExprValidationException("Insert-into is not a supported feature of on-demand queries");
}
}
public static Collection<Integer> getAgentInstanceIds(NamedWindowProcessor processor, ContextPartitionSelector selector, ContextManagementService contextManagementService, String contextName) {
Collection<Integer> agentInstanceIds;
if (selector == null || selector instanceof ContextPartitionSelectorAll) {
agentInstanceIds = processor.getProcessorInstancesAll();
}
else {
ContextManager contextManager = contextManagementService.getContextManager(contextName);
if (contextManager == null) {
throw new EPException("Context by name '" + contextName + "' could not be found");
}
agentInstanceIds = contextManager.getAgentInstanceIds(selector);
}
return agentInstanceIds;
}
}