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

org.apache.qpid.qmf2.common.NotifierWrapper

.apache.org/qpid/qmfv2-api-proposal.html>QMF2 API Proposal

 SUBSCRIBE_REQUEST: The SUBSCRIBE_REQUEST WorkItem provides a query that the agent application must periodically publish until the subscription is cancelled or expires. On receipt of this WorkItem, the application should call the Agent subscriptionResponse() method to acknowledge the request. On each publish interval, the application should call Agent subscriptionIndicate(), passing a list of the objects that satisfy the query. The subscription remains in effect until an    UNSUBSCRIBE_REQUEST WorkItem for the subscription is received, or the subscription expires. The getParams() method of a QUERY WorkItem will return an instance of the SubscriptionParams class. The getHandle() WorkItem method returns the reply handle which should be passed to the Agent's  subscriptionResponse() method.

@author Fraser Adams

        try
        {
            System.out.println("** Starting BigPayloadAgentTest a test of basic Agent class functions **");
                
            Connection connection = ConnectionHelper.createConnection(url, "{reconnect: true}");
            _agent = new Agent(this);
            _agent.setVendor("test.com");
            _agent.setProduct("big-payload-agent");


            System.out.println("Agent name: " + _agent.getName());

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        System.out.println("WorkItem type: " + wi.getType());


        if (wi.getType() == METHOD_CALL)
        {
            MethodCallWorkItem item = (MethodCallWorkItem)wi;
            MethodCallParams methodCallParams = item.getMethodCallParams();
            String methodName = methodCallParams.getName();
            ObjectId objectId = methodCallParams.getObjectId();


            QmfData inArgs = methodCallParams.getArgs();
            ObjectId controlAddress = _control.getObjectId();


            if (objectId.equals(controlAddress))
            {
                if (methodName.equals("processPayload"))

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    {
        System.out.println("WorkItem type: " + wi.getType());


        if (wi.getType() == METHOD_CALL)
        {
            MethodCallWorkItem item = (MethodCallWorkItem)wi;
            MethodCallParams methodCallParams = item.getMethodCallParams();
            String methodName = methodCallParams.getName();
            ObjectId objectId = methodCallParams.getObjectId();


            QmfData inArgs = methodCallParams.getArgs();
            ObjectId controlAddress = _control.getObjectId();


            if (objectId.equals(controlAddress))
            {
                if (methodName.equals("processPayload"))
                {
                    System.out.println("Invoked processPayload method");


                    byte[] parameter = inArgs.getValue("parameter");
                    System.out.println("payload size = " + parameter.length);


                    QmfData outArgs = new QmfData();
                    outArgs.setValue("return", parameter);
                    _agent.methodResponse(methodName, item.getHandle(), outArgs, null);
                }
            }
        }
    }

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    public void populateData() throws QmfException
    {
        System.out.println("*** BigPayloadAgentTest creating a control object ***");


        _control = new QmfAgentData(_controlSchema);
        _control.setValue("name", "controller");
        _agent.addObject(_control);
        System.out.println("BigPayloadAgentTest Schema control object added OK");
    }

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            registerObjectClass(mammal);
            registerObjectClass(insect);
            registerObjectClass(reptile);
            registerObjectClass(bird);


            QmfAgentData cat = new QmfAgentData(mammal);
            cat.setValue("name", "cat");
            cat.setValue("legs", 4l);
            addObject(cat);


            QmfAgentData dog = new QmfAgentData(mammal);
            dog.setValue("name", "dog");
            dog.setValue("legs", 4l);
            addObject(dog);


            QmfAgentData rabbit = new QmfAgentData(mammal);
            rabbit.setValue("name", "rabbit");
            rabbit.setValue("legs", 4);
            addObject(rabbit);


            QmfAgentData horse = new QmfAgentData(mammal);
            horse.setValue("name", "horse");
            horse.setValue("legs", 4);
            addObject(horse);


            QmfAgentData human = new QmfAgentData(mammal);
            human.setValue("name", "human");
            human.setValue("legs", 2);
            addObject(human);




            QmfAgentData wasp = new QmfAgentData(insect);
            wasp.setValue("name", "wasp");
            wasp.setValue("legs", 6);
            addObject(wasp);


            QmfAgentData ant = new QmfAgentData(insect);
            ant.setValue("name", "ant");
            ant.setValue("legs", 6);
            addObject(ant);


            QmfAgentData crocodile = new QmfAgentData(reptile);
            crocodile.setValue("name", "crocodile");
            crocodile.setValue("legs", 4);
            addObject(crocodile);


            QmfAgentData gecko = new QmfAgentData(reptile);
            gecko.setValue("name", "gecko");
            gecko.setValue("legs", 4);
            addObject(gecko);


            QmfAgentData python = new QmfAgentData(reptile);
            python.setValue("name", "python");
            python.setValue("legs", 0);
            addObject(python);


            QmfAgentData hawk = new QmfAgentData(bird);
            hawk.setValue("name", "hawk");
            hawk.setValue("legs", 2);
            addObject(hawk);


            QmfAgentData ostrich = new QmfAgentData(bird);
            ostrich.setValue("name", "ostrich");
            ostrich.setValue("legs", 2);
            addObject(ostrich);




            System.out.println("total number of objects registered: " + _objectIndex.size());

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        if (query.getObjectId() != null)
        {
            // Look up a QmfAgentData object by the ObjectId obtained from the query
            ObjectId objectId = query.getObjectId();
            QmfAgentData object = _objectIndex.get(objectId);
            if (object != null && !object.isDeleted())
            {
                results.add(new QmfConsoleData(object.mapEncode(), null));
            }
        }
        else
        {
            for (QmfAgentData object : _objectIndex.values())
            {
                if (!object.isDeleted() && query.evaluate(object))
                {
                    results.add(new QmfConsoleData(object.mapEncode(), null));
                }
            }
        }


        return results;

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            }
        }


        if (wi.getType() == SUBSCRIBE_REQUEST)
        {
            SubscribeRequestWorkItem item = (SubscribeRequestWorkItem)wi;
            SubscriptionParams params = item.getSubscriptionParams();
            Handle handle = item.getHandle();


            System.out.println("Subscribe Request User ID = " + params.getUserId());


            try
            {
                Subscription subscription = new Subscription(this, params);
                _subscriptions.put(subscription.getSubscriptionId(), subscription);
                _timer.schedule(subscription, 0, params.getPublishInterval());


                if (subscription == null)
                {
System.out.println("Requested Subscription has already expired or been cancelled");
                    QmfData error = new QmfData();
                    error.setValue("error_text", "Requested Subscription has already expired or been cancelled");
                    _agent.subscriptionResponse(handle, subscription.getConsoleHandle(), null, 0, 0, error);
                }
                else
                {
                    _agent.subscriptionResponse(handle, subscription.getConsoleHandle(), subscription.getSubscriptionId(), 
                                               subscription.getDuration(), subscription.getInterval(), null);
                }
            }
            catch (QmfException qmfe)
            {
                _agent.raiseException(handle, "Subscribe Request failed, invalid Query: " + qmfe.getMessage());
            }
        }


        if (wi.getType() == RESUBSCRIBE_REQUEST)
        {
            ResubscribeRequestWorkItem item = (ResubscribeRequestWorkItem)wi;
            ResubscribeParams params = item.getResubscribeParams();
            Handle handle = item.getHandle();


            System.out.println("Resubscribe Request User ID = " + params.getUserId());


            String subscriptionId = params.getSubscriptionId();
            Subscription subscription = _subscriptions.get(subscriptionId);
            if (subscription != null)
            {
                subscription.refresh(params);
                _agent.subscriptionResponse(handle, subscription.getConsoleHandle(), subscription.getSubscriptionId(), 
                                           subscription.getDuration(), subscription.getInterval(), null);
            }
            else
            {
System.out.println("Requested Subscription has already expired or been cancelled");
                QmfData error = new QmfData();
                error.setValue("error_text", "Requested Subscription has already expired or been cancelled");
                _agent.subscriptionResponse(handle, subscription.getConsoleHandle(), null, 0, 0, error);
            }
        }


        if (wi.getType() == UNSUBSCRIBE_REQUEST)
        {
            UnsubscribeRequestWorkItem item = (UnsubscribeRequestWorkItem)wi;
            String subscriptionId = item.getSubscriptionId();
System.out.println("Received cancellation request for " + subscriptionId);
            Subscription subscription = _subscriptions.get(subscriptionId);
            if (subscription != null)
            {
                subscription.cancel();

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    {
        try
        {
            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)
            {
                notifier.waitForWorkItem();
                System.out.println("WorkItem available, WorkItem count = " + _console.getWorkitemCount());


                WorkItem wi;
                while ((wi = _console.getNextWorkitem(0)) != null)
                {

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//System.out.println("content = " + content);
//System.out.println("opcode = " + opcode);
//System.out.println("routingKey = " + routingKey);
//System.out.println("contentType = " + contentType);


            Handle handle = new Handle(message.getJMSCorrelationID(), message.getJMSReplyTo());


            if (opcode.equals("_agent_locate_request"))
            {
                handleLocateRequest(handle);
            }

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        {
            _eventListener = new NullQmfEventListener();
        }
        else if (notifier instanceof Notifier)
        {
            _eventListener = new NotifierWrapper((Notifier)notifier, _workQueue);
        }
        else if (notifier instanceof QmfEventListener)
        {
            _eventListener = (QmfEventListener)notifier;
        }

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Related Classes of org.apache.qpid.qmf2.agent.SubscribeRequestWorkItem

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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