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.multithread; import com.espertech.esper.client.EPServiceProvider; import com.espertech.esper.client.EPStatement; import com.espertech.esper.client.EventBean; import com.espertech.esper.support.bean.SupportBean; import com.espertech.esper.support.util.SupportMTUpdateListener; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import java.util.*; import java.util.concurrent.Callable; public class StmtNamedWindowSubqueryLookupCallable implements Callable<Boolean> { private final EPServiceProvider engine; private final int numRepeats; private final int threadNum; private final EPStatement targetStatement; public StmtNamedWindowSubqueryLookupCallable(int threadNum, EPServiceProvider engine, int numRepeats, EPStatement targetStatement) { this.numRepeats = numRepeats; this.threadNum = threadNum; this.engine = engine; this.targetStatement = targetStatement; } public Boolean call() throws Exception { try { SupportMTUpdateListener listener = new SupportMTUpdateListener(); targetStatement.addListener(listener); for (int loop = 0; loop < numRepeats; loop++) { String threadKey = "K" + loop + "_" + threadNum; int valueExpected = threadNum * 1000000000 + loop + 1; // send insert event with string-value specific to thread sendEvent(threadKey, valueExpected); // send subquery trigger event with string-value specific to thread engine.getEPRuntime().sendEvent(new SupportBean(threadKey, -1)); // assert trigger event received List<EventBean[]> events = listener.getNewDataListCopy(); boolean found = false; for (EventBean[] arr : events) { for (EventBean item : arr) { Integer value = (Integer) item.get("val"); if (value == valueExpected) { found = true; break; } } if (found) { break; } } listener.reset(); if (!found) { return false; } // send delete event with string-value specific to thread sendEvent(threadKey, 0); } } catch (Exception ex) { log.fatal("Error in thread " + Thread.currentThread().getId(), ex); return false; } return true; } private void sendEvent(String key, int intupd) { Map<String, Object> theEvent = new HashMap<String, Object>(); theEvent.put("key", key); theEvent.put("intupd", intupd); engine.getEPRuntime().sendEvent(theEvent, "MyUpdateEvent"); } private static final Log log = LogFactory.getLog(StmtNamedWindowSubqueryLookupCallable.class); }