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.*; import com.espertech.esper.client.scopetest.EPAssertionUtil; import com.espertech.esper.support.bean.SupportBean; import com.espertech.esper.support.client.SupportConfigFactory; import junit.framework.TestCase; import org.apache.commons.logging.Log; import org.apache.commons.logging.LogFactory; import java.util.concurrent.ExecutorService; import java.util.concurrent.Executors; import java.util.concurrent.Future; import java.util.concurrent.TimeUnit; /** * Test for multithread-safety and named window subqueries and aggregation. */ public class TestMTStmtNamedWindowSubqueryAgg extends TestCase { private static final Log log = LogFactory.getLog(TestMTStmtNamedWindowSubqueryAgg.class); private EPServiceProvider engine; public void tearDown() { engine.initialize(); } public void testConcurrentSubqueryIndexNoShare() throws Exception { trySend(3, 1000, false); } public void testConcurrentSubqueryIndexShare() throws Exception { trySend(3, 1000, true); } private void trySend(int numThreads, int numEventsPerThread, boolean indexShare) throws Exception { Configuration config = SupportConfigFactory.getConfiguration(); config.addEventType("SupportBean", SupportBean.class); config.addPlugInAggregationFunction("intListAgg", MyIntListAggregation.class.getName()); config.getEngineDefaults().getEventMeta() .setDefaultEventRepresentation(Configuration.EventRepresentation.MAP); // use Map-type events for testing engine = EPServiceProviderManager.getDefaultProvider(config); engine.initialize(); // setup statements engine.getEPAdministrator().createEPL("create schema UpdateEvent as (uekey string, ueint int)"); engine.getEPAdministrator().createEPL("create schema WindowSchema as (wskey string, wsint int)"); String createEpl = "create window MyWindow.win:keepall() as WindowSchema"; if (indexShare) { createEpl = "@Hint('enable_window_subquery_indexshare') " + createEpl; } EPStatement namedWindow = engine.getEPAdministrator().createEPL(createEpl); engine.getEPAdministrator().createEPL("create index ABC on MyWindow(wskey)"); engine.getEPAdministrator() .createEPL("on UpdateEvent mue merge MyWindow mw " + "where uekey = wskey and ueint = wsint " + "when not matched then insert select uekey as wskey, ueint as wsint " + "when matched then delete"); // note: here all threads use the same string key to insert/delete and different values for the int EPStatement targetStatement = engine.getEPAdministrator().createEPL( "select (select intListAgg(wsint) from MyWindow mw where wskey = sb.theString) as val from SupportBean sb"); // execute ExecutorService threadPool = Executors.newFixedThreadPool(numThreads); Future<Boolean> future[] = new Future[numThreads]; for (int i = 0; i < numThreads; i++) { future[i] = threadPool .submit(new StmtNamedWindowSubqueryAggCallable(i, engine, numEventsPerThread, targetStatement)); } threadPool.shutdown(); threadPool.awaitTermination(10, TimeUnit.SECONDS); // total up result for (int i = 0; i < numThreads; i++) { Boolean result = future[i].get(); assertTrue(result); } EventBean[] events = EPAssertionUtil.iteratorToArray(namedWindow.iterator()); assertEquals(0, events.length); } }