Examples of org.apache.qpid.qmf2.agent.QmfAgentData

org.apache.qpid.qmf2.console.EventReceivedWorkItem
The Agent manages the data it represents by the QmfAgentData class - a derivative of the QmfData class.
The Agent is responsible for managing the values of the properties within the object, as well as servicing the object's method calls. Unlike the Console, the Agent has full control of the state of the object.
In most cases, for efficiency, it is expected that Agents would actually manage objects that are subclasses of QmfAgentData and maintain subclass specific properties as primitives, only actually explicitly setting the underlying Map properties via setValue() etc. when the object needs to be "serialised". This would most obviously be done by extending the mapEncode() method (noting that it's important to call QmfAgentData's mapEncode() first via super.mapEncode(); as this will set the state of the underlying QmfData).
This class provides a number of methods aren't in the QMF2 API per se, but they are used to manage the association between a managed object and any subscriptions that might be interested in it.
The diagram below shows the relationship between the Subscription and QmfAgentData.

In particular the QmfAgentData maintains references to active subscriptions to allow agents to asynchronously push data to subscribing Consoles immediately that data becomes available.
The update() method indicates that the object's state has changed and the publish() method immediately sends the new state to any subscription.
The original intention was to "auto update" by calling these from the setValue() method. Upon reflection this seems a bad idea, as in many cases there may be several properties that an Agent may wish to change which would lead to unnecessary calls to currentTimeMillis(), but also as theSubscription update is run via a TimerTask it is possible that an update indication could get sent part way through setting an object's overall state. Similarly calling the publish() method directly from setValue() would force an update indication on partial changes of state, which is generally not the desired behaviour. @author Fraser Adams

    public void onEvent(final WorkItem wi)
    {
        if (wi instanceof EventReceivedWorkItem)
        {
            EventReceivedWorkItem item = (EventReceivedWorkItem)wi;
            Agent agent = item.getAgent();
            QmfEvent event = item.getEvent();


            String className = event.getSchemaClassId().getClassName();
            if (className.equals("clientConnect") ||
                className.equals("clientDisconnect"))
            {
                _stateChanged = true;
            }
        }
        else if (wi instanceof AgentRestartedWorkItem)
        {
            _stateChanged = true;
        }
        else if (wi instanceof AgentHeartbeatWorkItem)
        {
            AgentHeartbeatWorkItem item = (AgentHeartbeatWorkItem)wi;
            Agent agent = item.getAgent();


            if (_stateChanged && agent.getName().contains("qpidd"))
            {
                logConnectionInformation();
                _stateChanged = false;
            }
        }

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        {
            _stateChanged = true;
        }
        else if (wi instanceof AgentHeartbeatWorkItem)
        {
            AgentHeartbeatWorkItem item = (AgentHeartbeatWorkItem)wi;
            Agent agent = item.getAgent();


            if (_stateChanged && agent.getName().contains("qpidd"))
            {
                logConnectionInformation();
                _stateChanged = false;

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            System.out.println("*** Starting Test2 asynchronous Agent discovery using WorkQueue API ***");
                
            BlockingNotifier notifier = new BlockingNotifier();


            Connection connection = ConnectionHelper.createConnection(url, "{reconnect: true}");
            _console = new Console(notifier);
//console.disableAgentDiscovery(); // To miss all notifications this needs done before addConnection()
            _console.addConnection(connection);


            int count = 0;
            while (true)

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    {
        try
        {
            System.out.println("*** Starting Test1 synchronous Agent discovery ***");
            Connection connection = ConnectionHelper.createConnection(url, "{reconnect: true}");
            _console = new Console();
            _console.addConnection(connection);


            System.out.println("*** Test1 testing _console.getAgents(): ***");
            List<Agent> agents = _console.getAgents();

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        try
        {
            System.out.println("*** Starting PartialGetObjectsTest used to test schema retrieval ***");
                
            Connection connection = ConnectionHelper.createConnection(url, "{reconnect: true}");
            _console = new Console(this);
            _console.addConnection(connection);


            // First we create a large number of queues using the QMF2 create method on the broker object
            List<QmfConsoleData> brokers = _console.getObjects("org.apache.qpid.broker", "broker");
            if (brokers.isEmpty())

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        _url = url;
        _filter = filter;
        try
        {
            Connection connection = ConnectionHelper.createConnection(url, connectionOptions);        
            _console = new Console(this);
            _console.addConnection(connection);


            // Wait until the broker Agent has been discovered
            _broker = _console.findAgent("broker");
            if (_broker != null)

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        _url = url;
        _whitelist = whitelist;
        try
        {
            Connection connection = ConnectionHelper.createConnection(url, connectionOptions);        
            _console = new Console(this);
            _console.addConnection(connection);
            checkExistingSubscriptions();
        }
        catch (QmfException qmfe)
        {

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    public ConnectionLogger(final String url, final String connectionOptions, final boolean logQueues)
    {
        try
        {
            Connection connection = ConnectionHelper.createConnection(url, connectionOptions);        
            _console = new Console(this);
            _console.addConnection(connection);
            _logQueues = logQueues;
            System.out.println("Hit Return to exit");
            logConnectionInformation();
        }

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     */
    public void onEvent(final WorkItem wi)
    {
        if (wi instanceof EventReceivedWorkItem)
        {
            EventReceivedWorkItem item = (EventReceivedWorkItem)wi;
            QmfEvent event = item.getEvent();
            String className = event.getSchemaClassId().getClassName();
            if (className.equals("subscribe"))
            {
                readWhitelist();
                String queueName = event.getStringValue("qName");

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     */
    public void onEvent(final WorkItem wi)
    {
        if (wi instanceof EventReceivedWorkItem)
        {
            EventReceivedWorkItem item = (EventReceivedWorkItem)wi;
            Agent agent = item.getAgent();
            QmfEvent event = item.getEvent();


            String className = event.getSchemaClassId().getClassName();
            if (className.equals("clientConnect") ||
                className.equals("clientDisconnect"))
            {
                _stateChanged = true;
            }
        }
        else if (wi instanceof AgentRestartedWorkItem)
        {
            _stateChanged = true;
        }
        else if (wi instanceof AgentHeartbeatWorkItem)
        {
            AgentHeartbeatWorkItem item = (AgentHeartbeatWorkItem)wi;
            Agent agent = item.getAgent();


            if (_stateChanged && agent.getName().contains("qpidd"))
            {
                logConnectionInformation();
                _stateChanged = false;

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org.apache.qpid.messaging.util.AddressParser

org.apache.qpid.qmf2.agent.Agent

org.apache.qpid.qmf2.agent.AgentExternal

org.apache.qpid.qmf2.agent.MethodCallParams

org.apache.qpid.qmf2.agent.MethodCallWorkItem

org.apache.qpid.qmf2.agent.QmfAgentData

org.apache.qpid.qmf2.agent.SubscriptionParams

org.apache.qpid.qmf2.common.Handle

org.apache.qpid.qmf2.common.NotifierWrapper

org.apache.qpid.qmf2.common.NullQmfEventListener

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