Java tutorial
/* * ************************************************************************************* * 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.thread; import com.espertech.esper.core.service.EPRuntimeImpl; import com.espertech.esper.core.service.EPStatementHandleCallback; import com.espertech.esper.core.service.EPServicesContext; import com.espertech.esper.epl.expression.ExprEvaluatorContext; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; /** * Timer unit for a single callback for a statement. */ public class TimerUnitSingle implements TimerUnit { private static final Log log = LogFactory.getLog(TimerUnitSingle.class); private final EPServicesContext services; private final EPRuntimeImpl runtime; private final EPStatementHandleCallback handleCallback; private final ExprEvaluatorContext exprEvaluatorContext; /** * Ctor. * @param services engine services * @param runtime runtime to process * @param handleCallback callback * @param exprEvaluatorContext expression evaluation context */ public TimerUnitSingle(EPServicesContext services, EPRuntimeImpl runtime, EPStatementHandleCallback handleCallback, ExprEvaluatorContext exprEvaluatorContext) { this.services = services; this.runtime = runtime; this.handleCallback = handleCallback; this.exprEvaluatorContext = exprEvaluatorContext; } public void run() { try { EPRuntimeImpl.processStatementScheduleSingle(handleCallback, services, exprEvaluatorContext); runtime.dispatch(); runtime.processThreadWorkQueue(); } catch (RuntimeException e) { log.error("Unexpected error processing timer execution: " + e.getMessage(), e); } } }