Java Code Examples for javax.management.MBeanServerConnection#invoke()

public static void main(String... args) throws Exception {
    MBeanServerConnection msc = ManagementFactory.getPlatformMBeanServer();
    HotSpotDiagnosticMXBean mxbean =
        ManagementFactory.getPlatformMXBean(msc, HotSpotDiagnosticMXBean.class);


    String[] signatures = new String[] {
        String.class.getName()
    };
    Object obj = msc.invoke(mxbean.getObjectName(), "getVMOption",
        new String[] { "PrintVMOptions"}, signatures);

    CompositeData data = (CompositeData)obj;
    validateType(data);

    VMOption option = mxbean.getVMOption("PrintVMOptions");
    VMOption o = VMOption.from(data);
    assertEquals(option, o);
}
 

/**
    Invoke the waitAMXReady() method on the DomainRoot MBean, which must already be loaded.
 */
private static void invokeWaitAMXReady(final MBeanServerConnection conn, final ObjectName objectName)
{
    try
    {
        conn.invoke( objectName, "waitAMXReady", null, null );
    }
    catch( final Exception e )
    {
        throw new RuntimeException(e);
    }
}
 

private static void doExploit ( final Object payloadObject, MBeanServerConnection mbc )
        throws IOException, InstanceNotFoundException, IntrospectionException, ReflectionException {
    Object[] params = new Object[1];
    params[ 0 ] = payloadObject;
    System.err.println("Querying MBeans");
    Set<ObjectInstance> testMBeans = mbc.queryMBeans(null, null);
    System.err.println("Found " + testMBeans.size() + " MBeans");
    for ( ObjectInstance oi : testMBeans ) {
        MBeanInfo mBeanInfo = mbc.getMBeanInfo(oi.getObjectName());
        for ( MBeanOperationInfo opInfo : mBeanInfo.getOperations() ) {
            try {
                mbc.invoke(oi.getObjectName(), opInfo.getName(), params, new String[] {});
                System.err.println(oi.getObjectName() + ":" + opInfo.getName() + " -> SUCCESS");
                return;
            }
            catch ( Throwable e ) {
                String msg = e.getMessage();
                if ( msg.startsWith("java.lang.ClassNotFoundException:") ) {
                    int start = msg.indexOf('"');
                    int stop = msg.indexOf('"', start + 1);
                    String module = ( start >= 0 && stop > 0 ) ? msg.substring(start + 1, stop) : "<unknown>";
                    if ( !"<unknown>".equals(module) && !"org.jboss.as.jmx:main".equals(module) ) {
                        int cstart = msg.indexOf(':');
                        int cend = msg.indexOf(' ', cstart + 2);
                        String cls = msg.substring(cstart + 2, cend);
                        System.err.println(oi.getObjectName() + ":" + opInfo.getName() + " -> FAIL CNFE " + cls + " (" + module + ")");
                    }
                }
                else {
                    System.err.println(oi.getObjectName() + ":" + opInfo.getName() + " -> SUCCESS|ERROR " + msg);
                    return;
                }
            }
        }
    }
}
 

public static void main(String[] args) throws IOException, AttachException, InstanceNotFoundException,
		MalformedObjectNameException, MBeanException, ReflectionException {
	AttachUtils.printJVMVersion();
	String pid = AttachUtils.checkPid(args);
	JMXConnector connector = JMXConnectorFactory.connect(AttachUtils.startLocalAgent(pid));

	MBeanServerConnection connection = connector.getMBeanServerConnection();
	String result = (String) connection.invoke(new ObjectName(DC_OBJECT_NAME), "threadPrint",
			new Object[] { new String[0] }, new String[] { String[].class.getName() });
	System.out.println(result);
}
 

@Test
public void testResolveExpressions() throws Exception {
    MBeanServerConnection connection = setupAndGetConnection(new BaseAdditionalInitialization(ProcessType.STANDALONE_SERVER));
    System.clearProperty("jboss.test.resolve.expressions.test");
    Assert.assertEquals("123", connection.invoke(LEGACY_ROOT_NAME, "resolveExpression", new String[]{"${jboss.test.resolve.expressions.test:123}"}, new String[]{String.class.getName()}));

    try {
        connection.invoke(LEGACY_ROOT_NAME, "resolveExpression", new String[]{"${jboss.test.resolve.expressions.test}"}, new String[]{String.class.getName()});
        Assert.fail("Should not have been able to resolve non-existent property");
    } catch (Exception expected) {
        //expected
    }

}
 

private void doOperation(boolean successExpected, String objectName, String operationName, JmxManagementInterface jmx) throws Exception {
    MBeanServerConnection connection = jmx.getConnection();
    ObjectName domain = new ObjectName(objectName);
    try {
        connection.invoke(domain, operationName, ArrayUtils.EMPTY_OBJECT_ARRAY, ArrayUtils.EMPTY_STRING_ARRAY);
        assertTrue("Failure was expected but success happened", successExpected);
    } catch (JMRuntimeException e) {
        if (e.getMessage().contains("WFLYJMX0037")) {
            assertFalse("Success was expected but failure happened: " + e, successExpected);
        } else {
            throw e;
        }
    }
}
 

private Object assertJmxInvoke(boolean expectSuccess, MBeanServerConnection connection, ObjectName mbean, String method,
        Object[] params, String[] signature) throws InstanceNotFoundException, MBeanException, ReflectionException, IOException {
    try {
        Object result = connection.invoke(mbean, method, params, signature);
        assertTrue(expectSuccess);
        return result;
    } catch (SecurityException se) {
        assertTrue(!expectSuccess);
        return null;
    }
}
 

private static void gc(MBeanServerConnection mBeanServer) {
	try {
		final ObjectName on = new ObjectName("java.lang:type=Memory");
		mBeanServer.getMBeanInfo(on);
		mBeanServer.invoke(on, "gc", new Object[0], new String[0]);
	}
	catch (Exception ignored) {
		System.err.println("Unable to gc");
	}
}
 

public static void main(String[] args) throws Exception {

        final MBeanServer mbs = MBeanServerFactory.createMBeanServer();

        final JMXServiceURL url = new JMXServiceURL("service:jmx:rmi://");

        JMXConnectorServer server = JMXConnectorServerFactory.newJMXConnectorServer(url, null, mbs);
        server.start();

        JMXConnector client = JMXConnectorFactory.connect(server.getAddress(), null);

        final MBeanServerConnection mbsc = client.getMBeanServerConnection();

        final ObjectName mbean = ObjectName.getInstance(":type=Simple");
        mbsc.createMBean(Simple.class.getName(), mbean);

        System.out.println("EmptyDomainNotificationTest-main: add a listener ...");
        final Listener li = new Listener();
        mbsc.addNotificationListener(mbean, li, null, null);

        System.out.println("EmptyDomainNotificationTest-main: ask to send a notif ...");
        mbsc.invoke(mbean, "emitNotification", null, null);

        System.out.println("EmptyDomainNotificationTest-main: waiting notif...");
        final long stopTime = System.currentTimeMillis() + 2000;
        synchronized(li) {
            long toWait = stopTime - System.currentTimeMillis();

            while (li.received < 1 && toWait > 0) {
                li.wait(toWait);

                toWait = stopTime - System.currentTimeMillis();
            }
        }

        if (li.received < 1) {
            throw new RuntimeException("No notif received!");
        } else if (li.received > 1) {
            throw new RuntimeException("Wait one notif but got: "+li.received);
        }

        System.out.println("EmptyDomainNotificationTest-main: Got the expected notif!");

        System.out.println("EmptyDomainNotificationTest-main: remove the listener.");
        mbsc.removeNotificationListener(mbean, li);

        // clean
        client.close();
        server.stop();

        System.out.println("EmptyDomainNotificationTest-main: Bye.");
    }
 

private final int doBasicMXBeanTest(MBeanServerConnection mbsc) {
    int errorCount = 0 ;
    System.out.println("---- doBasicMXBeanTest") ;

    try {
        ObjectName objName =
                new ObjectName("sqe:type=BasicMXBean") ;
        mbsc.createMBean(BASIC_MXBEAN_CLASS_NAME, objName);
        MBeanInfo mbInfo = mbsc.getMBeanInfo(objName);
        printMBeanInfo(mbInfo);
        System.out.println("---- OK\n") ;
        System.out.println("getMBeanInfo\t\t"
                + mbInfo);
        System.out.println("---- OK\n") ;

        System.out.println("Check mxbean field in the MBeanInfo");
        String mxbeanField =
                (String)mbInfo.getDescriptor().getFieldValue(JMX.MXBEAN_FIELD);

        if ( mxbeanField == null || ! mxbeanField.equals("true")) {
            System.out.println("---- ERROR : Improper mxbean field value "
                    + mxbeanField);
            errorCount++;
        }
        System.out.println("---- OK\n") ;

        System.out.println("Set attribute ObjectNameAtt");
        Attribute att = new Attribute("ObjectNameAtt", objName);
        mbsc.setAttribute(objName, att);
        ObjectName value =
                (ObjectName)mbsc.getAttribute(objName, "ObjectNameAtt");

        if ( ! value.equals(objName) ) {
            errorCount++;
            System.out.println("---- ERROR : setAttribute failed, got "
                    + value
                    + " while expecting "
                    + objName);
        }
        System.out.println("---- OK\n") ;

        System.out.println("Call operation doNothing");
        mbsc.invoke(objName,  "doNothing", null, null);
        System.out.println("---- OK\n") ;

        System.out.println("Call operation getWeather");
        Object weather = mbsc.invoke(objName,
                "getWeather",
                new Object[]{Boolean.TRUE},
                new String[]{"boolean"});
        System.out.println("Weather is " + weather);
        System.out.println("---- OK\n") ;
    } catch (Exception e) {
        Utils.printThrowable(e, true) ;
        errorCount++ ;
        System.out.println("---- ERROR\n") ;
    }

    return errorCount ;
}
 

private final int doBasicMXBeanTest(MBeanServerConnection mbsc) {
    int errorCount = 0 ;
    System.out.println("---- doBasicMXBeanTest") ;

    try {
        ObjectName objName =
                new ObjectName("sqe:type=BasicMXBean") ;
        mbsc.createMBean(BASIC_MXBEAN_CLASS_NAME, objName);
        MBeanInfo mbInfo = mbsc.getMBeanInfo(objName);
        printMBeanInfo(mbInfo);
        System.out.println("---- OK\n") ;
        System.out.println("getMBeanInfo\t\t"
                + mbInfo);
        System.out.println("---- OK\n") ;

        System.out.println("Check mxbean field in the MBeanInfo");
        String mxbeanField =
                (String)mbInfo.getDescriptor().getFieldValue(JMX.MXBEAN_FIELD);

        if ( mxbeanField == null || ! mxbeanField.equals("true")) {
            System.out.println("---- ERROR : Improper mxbean field value "
                    + mxbeanField);
            errorCount++;
        }
        System.out.println("---- OK\n") ;

        System.out.println("Set attribute ObjectNameAtt");
        Attribute att = new Attribute("ObjectNameAtt", objName);
        mbsc.setAttribute(objName, att);
        ObjectName value =
                (ObjectName)mbsc.getAttribute(objName, "ObjectNameAtt");

        if ( ! value.equals(objName) ) {
            errorCount++;
            System.out.println("---- ERROR : setAttribute failed, got "
                    + value
                    + " while expecting "
                    + objName);
        }
        System.out.println("---- OK\n") ;

        System.out.println("Call operation doNothing");
        mbsc.invoke(objName,  "doNothing", null, null);
        System.out.println("---- OK\n") ;

        System.out.println("Call operation getWeather");
        Object weather = mbsc.invoke(objName,
                "getWeather",
                new Object[]{Boolean.TRUE},
                new String[]{"boolean"});
        System.out.println("Weather is " + weather);
        System.out.println("---- OK\n") ;
    } catch (Exception e) {
        Utils.printThrowable(e, true) ;
        errorCount++ ;
        System.out.println("---- ERROR\n") ;
    }

    return errorCount ;
}
 

private static void test() throws Exception {
    // Create client
    //
    JMXConnector connector = JMXConnectorFactory.connect(url);
    MBeanServerConnection client = connector.getMBeanServerConnection();

    // Add listener at the client side
    //
    client.addNotificationListener(mbean, listener, null, null);

    // Cleanup
    //
    receivedNotifs = 0;

    // Ask to send notifs
    //
    Object[] params = new Object[] {new Integer(nb)};
    String[] signatures = new String[] {"java.lang.Integer"};

    client.invoke(mbean, "sendNotifications", params, signatures);

    // Waiting...
    //
    synchronized (lock) {
        for (int i = 0; i < 10; i++) {
            if (receivedNotifs < nb) {
                lock.wait(1000);
            }
        }
    }

    // Waiting again to ensure no more notifs
    //
    Thread.sleep(3000);

    synchronized (lock) {
        if (receivedNotifs != nb) {
            throw new Exception("The client expected to receive " +
                                nb + " notifs, but got " + receivedNotifs);
        }
    }

    // Remove listener
    //
    client.removeNotificationListener(mbean, listener);

    connector.close();
}
 

Object invoke(MBeanServerConnection mbsc, ObjectName name, Object[] args)
        throws Exception {
    return mbsc.invoke(name, getName(), args, signature);
}
 

private static boolean notifyTest(JMXConnector client,
                                  MBeanServerConnection mbsc)
        throws Exception {
    System.out.println("Send notifications including unknown ones");
    result = new Result();
    LostListener ll = new LostListener();
    client.addConnectionNotificationListener(ll, null, null);
    TestListener nl = new TestListener(ll);
    mbsc.addNotificationListener(on, nl, new TestFilter(), null);
    mbsc.invoke(on, "sendNotifs", NO_OBJECTS, NO_STRINGS);

    // wait for the listeners to receive all their notifs
    // or to fail
    long deadline = System.currentTimeMillis() + 60000;
    long remain;
    while ((remain = deadline - System.currentTimeMillis()) >= 0) {
        synchronized (result) {
            if (result.failed
                || (result.knownCount >= NNOTIFS
                    && result.lostCount >= NNOTIFS*2))
                break;
            result.wait(remain);
        }
    }
    Thread.sleep(2);  // allow any spurious extra notifs to arrive
    if (result.failed) {
        System.out.println("TEST FAILS: Notification strangeness");
        return false;
    } else if (result.knownCount == NNOTIFS
               && result.lostCount == NNOTIFS*2) {
        System.out.println("Success: received known notifications and " +
                           "got NOTIFS_LOST for unknown and " +
                           "unserializable ones");
        return true;
    } else if (result.knownCount >= NNOTIFS
            || result.lostCount >= NNOTIFS*2) {
        System.out.println("TEST FAILS: Received too many notifs: " +
                "known=" + result.knownCount + "; lost=" + result.lostCount);
        return false;
    } else {
        System.out.println("TEST FAILS: Timed out without receiving " +
                           "all notifs: known=" + result.knownCount +
                           "; lost=" + result.lostCount);
        return false;
    }
}
 

private static boolean notifyTest(JMXConnector client,
                                  MBeanServerConnection mbsc)
        throws Exception {
    System.out.println("Send notifications including unknown ones");
    result = new Result();
    LostListener ll = new LostListener();
    client.addConnectionNotificationListener(ll, null, null);
    TestListener nl = new TestListener(ll);
    mbsc.addNotificationListener(on, nl, new TestFilter(), null);
    mbsc.invoke(on, "sendNotifs", NO_OBJECTS, NO_STRINGS);

    // wait for the listeners to receive all their notifs
    // or to fail
    long deadline = System.currentTimeMillis() + 60000;
    long remain;
    while ((remain = deadline - System.currentTimeMillis()) >= 0) {
        synchronized (result) {
            if (result.failed
                || (result.knownCount >= NNOTIFS
                    && result.lostCount >= NNOTIFS*2))
                break;
            result.wait(remain);
        }
    }
    Thread.sleep(2);  // allow any spurious extra notifs to arrive
    if (result.failed) {
        System.out.println("TEST FAILS: Notification strangeness");
        return false;
    } else if (result.knownCount == NNOTIFS
               && result.lostCount == NNOTIFS*2) {
        System.out.println("Success: received known notifications and " +
                           "got NOTIFS_LOST for unknown and " +
                           "unserializable ones");
        return true;
    } else if (result.knownCount >= NNOTIFS
            || result.lostCount >= NNOTIFS*2) {
        System.out.println("TEST FAILS: Received too many notifs: " +
                "known=" + result.knownCount + "; lost=" + result.lostCount);
        return false;
    } else {
        System.out.println("TEST FAILS: Timed out without receiving " +
                           "all notifs: known=" + result.knownCount +
                           "; lost=" + result.lostCount);
        return false;
    }
}
 

public static void main(String[] args) throws Exception {

        final MBeanServer mbs = MBeanServerFactory.createMBeanServer();

        final JMXServiceURL url = new JMXServiceURL("service:jmx:rmi://");

        JMXConnectorServer server = JMXConnectorServerFactory.newJMXConnectorServer(url, null, mbs);
        server.start();

        JMXConnector client = JMXConnectorFactory.connect(server.getAddress(), null);

        final MBeanServerConnection mbsc = client.getMBeanServerConnection();

        final ObjectName mbean = ObjectName.getInstance(":type=Simple");
        mbsc.createMBean(Simple.class.getName(), mbean);

        System.out.println("EmptyDomainNotificationTest-main: add a listener ...");
        final Listener li = new Listener();
        mbsc.addNotificationListener(mbean, li, null, null);

        System.out.println("EmptyDomainNotificationTest-main: ask to send a notif ...");
        mbsc.invoke(mbean, "emitNotification", null, null);

        System.out.println("EmptyDomainNotificationTest-main: waiting notif...");
        final long stopTime = System.currentTimeMillis() + 2000;
        synchronized(li) {
            long toWait = stopTime - System.currentTimeMillis();

            while (li.received < 1 && toWait > 0) {
                li.wait(toWait);

                toWait = stopTime - System.currentTimeMillis();
            }
        }

        if (li.received < 1) {
            throw new RuntimeException("No notif received!");
        } else if (li.received > 1) {
            throw new RuntimeException("Wait one notif but got: "+li.received);
        }

        System.out.println("EmptyDomainNotificationTest-main: Got the expected notif!");

        System.out.println("EmptyDomainNotificationTest-main: remove the listener.");
        mbsc.removeNotificationListener(mbean, li);

        // clean
        client.close();
        server.stop();

        System.out.println("EmptyDomainNotificationTest-main: Bye.");
    }
 

private static void test(String proto) throws Exception {
    System.out.println("\n>>> Test for protocol " + proto);

    JMXServiceURL url = new JMXServiceURL(proto, null, 0);

    System.out.println(">>> Create a server: "+url);

    JMXConnectorServer server = null;
    try {
        server = JMXConnectorServerFactory.newJMXConnectorServer(url, null, mbeanServer);
    } catch (MalformedURLException e) {
        System.out.println("System does not recognize URL: " + url +
                           "; ignoring");
        return;
    }

    server.start();

    url = server.getAddress();

    System.out.println(">>> Creating a client connectint to: "+url);
    JMXConnector conn = JMXConnectorFactory.connect(url, null);
    MBeanServerConnection client = conn.getMBeanServerConnection();

    // add listener from the client side
    Listener listener = new Listener();
    client.addNotificationListener(emitter, listener, null, null);

    // ask to send one not serializable notif
    Object[] params = new Object[] {new Integer(1)};
    String[] signatures = new String[] {"java.lang.Integer"};
    client.invoke(emitter, "sendNotserializableNotifs", params, signatures);

    // listener clean
    client.removeNotificationListener(emitter, listener);
    listener = new Listener();
    client.addNotificationListener(emitter, listener, null, null);

    //ask to send serializable notifs
    params = new Object[] {new Integer(sentNotifs)};
    client.invoke(emitter, "sendNotifications", params, signatures);

    // waiting ...
    synchronized (listener) {
        while (listener.received() < sentNotifs) {
            listener.wait(); // either pass or test timeout (killed by test harness)

        }
    }

    // clean
    client.removeNotificationListener(emitter, listener);

    conn.close();
    server.stop();
}
 

@Test
public void action() throws Exception {

    final ResourceManager rm = rmHelper.getResourceManager();
    // The username and thr password must be the same a used to connect to the RM
    final String adminLogin = TestUsers.TEST.username;
    final String adminPassword = TestUsers.TEST.password;

    // All accounting values are checked through JMX
    final RMAuthentication auth = rmHelper.getRMAuth();
    final PublicKey pubKey = auth.getPublicKey();
    final Credentials adminCreds = Credentials.createCredentials(new CredData(adminLogin, adminPassword), pubKey);

    final JMXServiceURL jmxRmiServiceURL = new JMXServiceURL(auth.getJMXConnectorURL(JMXTransportProtocol.RMI));
    final HashMap<String, Object> env = new HashMap<>(1);
    env.put(JMXConnector.CREDENTIALS, new Object[] { adminLogin, adminCreds });

    // Connect to the JMX RMI Connector Server
    final ObjectName myAccountMBeanName = new ObjectName(RMJMXBeans.MYACCOUNT_MBEAN_NAME);
    final ObjectName managementMBeanName = new ObjectName(RMJMXBeans.MANAGEMENT_MBEAN_NAME);
    final JMXConnector jmxConnector = JMXConnectorFactory.connect(jmxRmiServiceURL, env);
    final MBeanServerConnection conn = jmxConnector.getMBeanServerConnection();

    // Ensure that no refreshes was done and all account values are correctly initialized        
    AttributeList atts = conn.getAttributes(myAccountMBeanName,
                                            new String[] { "UsedNodeTime", "ProvidedNodeTime",
                                                           "ProvidedNodesCount" });

    long usedNodeTime = (Long) ((Attribute) atts.get(0)).getValue();
    long providedNodeTime = (Long) ((Attribute) atts.get(1)).getValue();
    int providedNodesCount = (Integer) ((Attribute) atts.get(2)).getValue();

    // ADD, GET, RELEASE, REMOVE
    // 1) ADD
    final long beforeAddTime = System.currentTimeMillis();
    testNode = rmHelper.createNode("test");
    Node node = testNode.getNode();
    final String nodeURL = node.getNodeInformation().getURL();
    rm.addNode(nodeURL).getBooleanValue();

    // We eat the configuring to free event
    rmHelper.waitForNodeEvent(RMEventType.NODE_ADDED, nodeURL);
    rmHelper.waitForNodeEvent(RMEventType.NODE_STATE_CHANGED, nodeURL);
    // 2) GET
    final long beforeGetTime = System.currentTimeMillis();
    node = rm.getAtMostNodes(1, null).get(0);

    // Sleep a certain amount of time that will be the minimum amount of the GET->RELEASE duration 
    Thread.sleep(GR_DURATION);

    // 3) RELEASE
    rm.releaseNode(node).getBooleanValue();
    final long getReleaseMaxDuration = System.currentTimeMillis() - beforeGetTime;

    // 4) REMOVE  
    rm.removeNode(nodeURL, true).getBooleanValue();
    final long addRemoveMaxDuration = System.currentTimeMillis() - beforeAddTime;

    // Refresh the account manager
    conn.invoke(managementMBeanName, "clearAccoutingCache", null, null);

    // Check account values validity                      
    atts = conn.getAttributes(myAccountMBeanName,
                              new String[] { "UsedNodeTime", "ProvidedNodeTime", "ProvidedNodesCount" });
    usedNodeTime = (Long) ((Attribute) atts.get(0)).getValue() - usedNodeTime;
    providedNodeTime = (Long) ((Attribute) atts.get(1)).getValue() - providedNodeTime;
    providedNodesCount = (Integer) ((Attribute) atts.get(2)).getValue() - providedNodesCount;

    Assert.assertTrue("Invalid value of the usedNodeTime attribute (usedNodeTime=" + usedNodeTime + ")",
                      (usedNodeTime >= GR_DURATION));
    Assert.assertTrue("Invalid value of the usedNodeTime attribute (getReleaseMaxDuration=" +
                      getReleaseMaxDuration + ")", (usedNodeTime <= getReleaseMaxDuration));
    Assert.assertTrue("Invalid value of the providedNodeTime attribute",
                      (providedNodeTime >= usedNodeTime) && (providedNodeTime <= addRemoveMaxDuration));
}
 

public static void main(String[] args) throws Exception {

        final MBeanServer mbs = MBeanServerFactory.createMBeanServer();

        final JMXServiceURL url = new JMXServiceURL("service:jmx:rmi://");

        JMXConnectorServer server = JMXConnectorServerFactory.newJMXConnectorServer(url, null, mbs);
        server.start();

        JMXConnector client = JMXConnectorFactory.connect(server.getAddress(), null);

        final MBeanServerConnection mbsc = client.getMBeanServerConnection();

        final ObjectName mbean = ObjectName.getInstance(":type=Simple");
        mbsc.createMBean(Simple.class.getName(), mbean);

        System.out.println("EmptyDomainNotificationTest-main: add a listener ...");
        final Listener li = new Listener();
        mbsc.addNotificationListener(mbean, li, null, null);

        System.out.println("EmptyDomainNotificationTest-main: ask to send a notif ...");
        mbsc.invoke(mbean, "emitNotification", null, null);

        System.out.println("EmptyDomainNotificationTest-main: waiting notif...");
        final long stopTime = System.currentTimeMillis() + 2000;
        synchronized(li) {
            long toWait = stopTime - System.currentTimeMillis();

            while (li.received < 1 && toWait > 0) {
                li.wait(toWait);

                toWait = stopTime - System.currentTimeMillis();
            }
        }

        if (li.received < 1) {
            throw new RuntimeException("No notif received!");
        } else if (li.received > 1) {
            throw new RuntimeException("Wait one notif but got: "+li.received);
        }

        System.out.println("EmptyDomainNotificationTest-main: Got the expected notif!");

        System.out.println("EmptyDomainNotificationTest-main: remove the listener.");
        mbsc.removeNotificationListener(mbean, li);

        // clean
        client.close();
        server.stop();

        System.out.println("EmptyDomainNotificationTest-main: Bye.");
    }
 

private static void test() throws Exception {
    // Create client
    //
    JMXConnector connector = JMXConnectorFactory.connect(url);
    MBeanServerConnection client = connector.getMBeanServerConnection();

    // Add listener at the client side
    //
    client.addNotificationListener(mbean, listener, null, null);

    // Cleanup
    //
    receivedNotifs = 0;

    // Ask to send notifs
    //
    Object[] params = new Object[] {new Integer(nb)};
    String[] signatures = new String[] {"java.lang.Integer"};

    client.invoke(mbean, "sendNotifications", params, signatures);

    // Waiting...
    //
    synchronized (lock) {
        for (int i = 0; i < 10; i++) {
            if (receivedNotifs < nb) {
                lock.wait(1000);
            }
        }
    }

    // Waiting again to ensure no more notifs
    //
    Thread.sleep(3000);

    synchronized (lock) {
        if (receivedNotifs != nb) {
            throw new Exception("The client expected to receive " +
                                nb + " notifs, but got " + receivedNotifs);
        }
    }

    // Remove listener
    //
    client.removeNotificationListener(mbean, listener);

    connector.close();
}