StmtNamedWindowSubqueryLookupCallable.java

/*
 * *************************************************************************************
 *  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);
}