Examples of org.apache.zookeeper.server.quorum.QuorumCnxManager$Message

Package org.apache.zookeeper.server.quorum

Examples of org.apache.zookeeper.server.quorum.QuorumCnxManager$Message

org.eclipse.bpmn2.Message
This class implements a connection manager for leader election using TCP. It maintains one coonection for every pair of servers. The tricky part is to guarantee that there is exactly one connection for every pair of servers that are operating correctly and that can communicate over the network. If two servers try to start a connection concurrently, then the connection manager uses a very simple tie-breaking mechanism to decide which connection to drop based on the IP addressed of the two parties. For every peer, the manager maintains a queue of messages to send. If the connection to any particular peer drops, then the sender thread puts the message back on the list. As this implementation currently uses a queue implementation to maintain messages to send to another peer, we add the message to the tail of the queue, thus changing the order of messages. Although this is not a problem for the leader election, it could be a problem when consolidating peer communication. This is to be verified, though.

        return failure;
    }
    public String _verifyThreadCount(ArrayList<QuorumPeer> peerList, long ecnt) {
        for (int myid = 0; myid < peerList.size(); myid++) {
            QuorumPeer peer = peerList.get(myid);
            QuorumCnxManager cnxManager = peer.getQuorumCnxManager();
            long cnt = cnxManager.getThreadCount();
            if (cnt != ecnt) {
                return new Date()
                    + " Incorrect number of Worker threads for sid=" + myid
                    + " expected " + ecnt + " found " + cnt;
            }

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        }


        public void run(){
            try {
                QuorumPeer peer = new QuorumPeer(peers, peerTmpdir[0], peerTmpdir[0], peerClientPort[0], 3, 0, 1000, 2, 2);
                QuorumCnxManager cnxManager = new QuorumCnxManager(peer);
                QuorumCnxManager.Listener listener = cnxManager.listener;
                if(listener != null){
                    listener.start();
                } else {
                    LOG.error("Null listener when initializing cnx manager");
                }


                long sid = 1;
                cnxManager.toSend(sid, createMsg(ServerState.LOOKING.ordinal(), 0, -1, 1));


                Message m = null;
                int numRetries = 1;
                while((m == null) && (numRetries++ <= THRESHOLD)){
                    m = cnxManager.pollRecvQueue(3000, TimeUnit.MILLISECONDS);
                    if(m == null) cnxManager.connectAll();
                }


                if(numRetries > THRESHOLD){
                    failed = true;
                    return;
                }


                cnxManager.testInitiateConnection(sid);


                m = cnxManager.pollRecvQueue(3000, TimeUnit.MILLISECONDS);
                if(m == null){
                    failed = true;
                    return;
                }
            } catch (Exception e) {

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        /*
         * Start mock server 1
         */
        QuorumPeer mockPeer = new QuorumPeer(peers, tmpdir[1], tmpdir[1], port[1], 3, 1, 1000, 2, 2);
        cnxManagers[0] = new QuorumCnxManager(mockPeer);
        cnxManagers[0].listener.start();


        cnxManagers[0].toSend(0l, initialMsg);


        /*
         * Start mock server 2
         */
        mockPeer = new QuorumPeer(peers, tmpdir[2], tmpdir[2], port[2], 3, 2, 1000, 2, 2);
        cnxManagers[1] = new QuorumCnxManager(mockPeer);
        cnxManagers[1].listener.start();


        cnxManagers[1].toSend(0l, initialMsg);


        /*

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        }
    }


    void mockServer() throws InterruptedException, IOException {
        QuorumPeer peer = new QuorumPeer(peers, tmpdir[0], tmpdir[0], port[0], 3, 0, 1000, 2, 2);
        cnxManager = new QuorumCnxManager(peer);
        cnxManager.listener.start();


        cnxManager.toSend(1l, FLETestUtils.createMsg(ServerState.LOOKING.ordinal(), 0, 0, 0));
        cnxManager.recvQueue.take();
        cnxManager.toSend(1L, FLETestUtils.createMsg(ServerState.FOLLOWING.ordinal(), 1, 0, 0));

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    protected static final Logger LOG = LoggerFactory.getLogger(FLEPredicateTest.class);
    
    class MockFLE extends FastLeaderElection {
        MockFLE(QuorumPeer peer){
            super(peer, new QuorumCnxManager(peer));
        }

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    public void testMessageUnmarshalling() throws Exception {
        Bpmn2JsonUnmarshaller unmarshaller = new Bpmn2JsonUnmarshaller();
        Definitions definitions = ((Definitions) unmarshaller.unmarshall(getTestJsonFile("message.json"), "").getContents().get(0));
        assertTrue(definitions.getRootElements().size() == 2);
        assertTrue(definitions.getRootElements().iterator().next() instanceof Message);
        Message msg = (Message) definitions.getRootElements().iterator().next();
        assertEquals("message", msg.getName());
        definitions.eResource().save(System.out, Collections.emptyMap());
    }

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            if (result == null)
                result = defaultCase(theEObject);
            return result;
        }
        case Bpmn2Package.MESSAGE: {
            Message message = (Message) theEObject;
            T result = caseMessage(message);
            if (result == null)
                result = caseRootElement(message);
            if (result == null)
                result = caseBaseElement(message);

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     * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
     * @generated
     */
    public void setMessageRef(Message newMessageRef) {
        Message oldMessageRef = messageRef;
        messageRef = newMessageRef;
        if (eNotificationRequired())
            eNotify(new ENotificationImpl(this, Notification.SET,
                    Bpmn2Package.RECEIVE_TASK__MESSAGE_REF, oldMessageRef, messageRef));
    }

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     * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
     * @generated
     */
    public void setMessageRef(Message newMessageRef) {
        Message oldMessageRef = messageRef;
        messageRef = newMessageRef;
        if (eNotificationRequired())
            eNotify(new ENotificationImpl(this, Notification.SET,
                    Bpmn2Package.MESSAGE_EVENT_DEFINITION__MESSAGE_REF, oldMessageRef, messageRef));
    }

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     * <!-- begin-user-doc -->
     * <!-- end-user-doc -->
     * @generated
     */
    public void setMessageRef(Message newMessageRef) {
        Message oldMessageRef = messageRef;
        messageRef = newMessageRef;
        if (eNotificationRequired())
            eNotify(new ENotificationImpl(this, Notification.SET,
                    Bpmn2Package.MESSAGE_FLOW__MESSAGE_REF, oldMessageRef, messageRef));
    }

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