Glassfish example source code file (NotificationServiceTest.java)

This example Glassfish source code file (NotificationServiceTest.java) is included in the DevDaily.com "Java Source Code Warehouse" project. The intent of this project is to help you "Learn Java by Example" ^TM.

Java - Glassfish tags/keywords

arraylist, countdownlatch, exception, interruptedexception, log, logging, management, mylistener, mylistener, notification, notification, notificationservice, notificationservice, notificationservicehelper, notificationservicetest, object, object, threading, threads, util

The Glassfish NotificationServiceTest.java source code

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 * https://glassfish.dev.java.net/public/CDDL+GPL_1_1.html
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package org.glassfish.admin.amxtest.base;

import com.sun.appserv.management.base.NotificationService;
import com.sun.appserv.management.base.NotificationServiceMgr;
import com.sun.appserv.management.base.QueryMgr;
import com.sun.appserv.management.base.Util;
import com.sun.appserv.management.helper.NotificationServiceHelper;
import org.glassfish.admin.amxtest.AMXTestBase;
import org.glassfish.admin.amxtest.Capabilities;

import javax.management.AttributeChangeNotification;
import javax.management.InstanceNotFoundException;
import javax.management.Notification;
import javax.management.NotificationListener;
import javax.management.ObjectName;
import java.util.ArrayList;
import java.util.Collections;
import java.util.List;
import java.util.Map;
import java.util.logging.Level;

import java.util.concurrent.CountDownLatch;
import java.util.concurrent.TimeUnit;

/**
 */
public final class NotificationServiceTest
        extends AMXTestBase {
    public NotificationServiceTest() {
    }

    public static Capabilities
    getCapabilities() {
        return getOfflineCapableCapabilities(true);
    }

    public NotificationService
    create() {
        final NotificationServiceMgr proxy = getNotificationServiceMgr();

        return (proxy.createNotificationService("test", 512));
    }

    public void
    testCreate()
            throws Exception {
        final NotificationService proxy = create();

        removeNotificationService(proxy);
    }

    public void
    testGetFromEmpty()
            throws Exception {
        final NotificationService proxy = create();

        assert (proxy.getListeneeSet().size() == 0);
        final Object id = proxy.createBuffer(10, null);
        final Map<String, Object> result = proxy.getBufferNotifications(id, 0);
        final Notification[] notifs = (Notification[]) result.get(proxy.NOTIFICATIONS_KEY);
        assertEquals(0, notifs.length);
    }

    private void
    removeNotificationService(final NotificationService service)
            throws InstanceNotFoundException {
        getNotificationServiceMgr().removeNotificationService(service.getName());
    }


    private static final class MyListener
            implements NotificationListener {
        private final List<Notification> mReceived;
        private final CountDownLatch mLatch;

        public MyListener( final int numNeeded ) {
            mReceived = Collections.synchronizedList(new ArrayList<Notification>());
            mLatch     = new CountDownLatch(numNeeded);
        }

        public void
        handleNotification(
                final Notification notif,
                final Object handback) {
            mReceived.add(notif);
            mLatch.countDown();
        }
        
        public boolean await( final long amt, final TimeUnit units )
            throws InterruptedException
        {
           return mLatch.await( amt, units);
        }

        public int
        getCount() {
            return (mReceived.size());
        }
    }

    private static void
    sleep(int duration) {
        try {
            Thread.sleep(duration);
        }
        catch (InterruptedException e) {
        }
    }

    public void
    testListen()
            throws Exception {
        //trace( "testListen: START" );
        final NotificationService proxy = create();

        final QueryMgr queryMgr = getQueryMgr();
        final ObjectName objectName = Util.getObjectName(queryMgr);

        final Object id = proxy.createBuffer(10, null);
        final NotificationServiceHelper helper = new NotificationServiceHelper(proxy, id);
        proxy.listenTo(objectName, null);
        assert (proxy.getListeneeSet().size() == 1);
        assert (Util.getObjectName((Util.asAMX(proxy.getListeneeSet().iterator().next()))).equals(objectName));

        //trace( "testListen: NEWING" );
        final MyListener myListener = new MyListener(2);    // we expect two changes, see below
        proxy.addNotificationListener(myListener, null, null);
        final String saveLevel = queryMgr.getMBeanLogLevel();
        queryMgr.setMBeanLogLevel("" + Level.FINEST);
        queryMgr.setMBeanLogLevel(saveLevel);

        //trace( "testListen: WAITING" );
        // delivery may be asynchronous; wait until done
        if ( ! myListener.await( 5, TimeUnit.SECONDS ) )
        {
            //trace( "testListen: FAILED TIMEOUT" );
            assert false : "NotificationServiceTest.testListen():  TIMED OUT waiting for Notifications";
        }
        
        //trace( "testListen: NOT FAILED" );
        assert (myListener.getCount() == 2);

        Notification[] notifs = helper.getNotifications();

        assertEquals(2, notifs.length);
        assert (notifs[0].getType().equals(AttributeChangeNotification.ATTRIBUTE_CHANGE));
        assert (notifs[1].getType().equals(AttributeChangeNotification.ATTRIBUTE_CHANGE));
        notifs = helper.getNotifications();
        assert (notifs.length == 0);


        proxy.dontListenTo(objectName);
        assert (proxy.getListeneeSet().size() == 0);

        removeNotificationService(proxy);
        //trace( "testListen: EXIT" );
    }

}