Examples of org.apache.zookeeper.ZooKeeper$ZKWatchManager

org.apache.zookeeper.ZooKeeper
Manage watchers & handle events generated by the ClientCnxn object. We are implementing this as a nested class of ZooKeeper so that the public methods will not be exposed as part of the ZooKeeper client API.

            // the removed server
            // while others are invoked by a client connected to some other
            // server.
            // when we're removing the leader, zk1 will be the client connected
            // to removed server
            ZooKeeper zk1 = (changingIndex == leaderIndex) ? zkArr[leaderIndex]
                    : zkArr[(leaderIndex % qu.ALL) + 1];


            // exactly as it is now, except for role change
            joiningServers.add("server."
                    + changingIndex

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            Thread.sleep(1000);
            zkArr[observerIndex].setData("/test", "teststr".getBytes(), -1);
          }
          Assert.fail("client port didn't change");
        } catch (KeeperException.ConnectionLossException e) {
            zkArr[observerIndex] = new ZooKeeper("127.0.0.1:"
                    + qu.getPeer(observerIndex).peer.getClientPort(),
                    ClientBase.CONNECTION_TIMEOUT, new Watcher() {
                        public void process(WatchedEvent event) {}});
        }

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        String remotePeerBean3 = CommonNames.DOMAIN
                + ":name0=ReplicatedServer_id" + replica3 + ",name1=replica."
                + leavingIndex;
        assertRemotePeerMXBeanAttributes(leavingQS3, remotePeerBean3);


        ZooKeeper zk = zkArr[leavingIndex];


        leavingServers.add(Integer.toString(leavingIndex));


        // remember this server so we can add it back later
        joiningServers.add("server." + leavingIndex + "=127.0.0.1:"

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                + changingIndex;
        assertRemotePeerMXBeanAttributes(changingQS3, remotePeerBean3);


        String newRole = "observer";


        ZooKeeper zk = zkArr[changingIndex];


        // exactly as it is now, except for role change
        joiningServers.add("server." + changingIndex + "=127.0.0.1:"
                + qu.getPeer(changingIndex).peer.getQuorumAddress().getPort()
                + ":"

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        Assert.assertTrue("waiting for server being up",
                ClientBase.waitForServerUp("127.0.0.1:" + CLIENT_PORT,
                        CONNECTION_TIMEOUT));




        ZooKeeper zk = new ZooKeeper("127.0.0.1:" + CLIENT_PORT,
                ClientBase.CONNECTION_TIMEOUT, this);


        zk.create("/foo", "foobar".getBytes(), Ids.OPEN_ACL_UNSAFE,
                CreateMode.PERSISTENT);
        Assert.assertEquals(new String(zk.getData("/foo", null, null)), "foobar");
        zk.close();


        main.shutdown();
        main.join();
        main.deleteDirs();

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        Assert.assertTrue("waiting for server being up",
                ClientBase.waitForServerUp("127.0.0.1:" + CLIENT_PORT,
                        CONNECTION_TIMEOUT));


        ZooKeeper zk = new ZooKeeper("127.0.0.1:" + CLIENT_PORT,
                ClientBase.CONNECTION_TIMEOUT, this);


        zk.create("/foo", "foobar".getBytes(), Ids.OPEN_ACL_UNSAFE,
                CreateMode.PERSISTENT);
        Assert.assertEquals(new String(zk.getData("/foo", null, null)),
                "foobar");
        zk.close();


        main.shutdown();
        main.join();
        main.deleteDirs();

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    private void verifySessionTimeOut(int sessionTimeout,
            int expectedSessionTimeout, String HOSTPORT) throws IOException,
            KeeperException, InterruptedException {
        clientConnected = new CountDownLatch(1);
        ZooKeeper zk = new ZooKeeper(HOSTPORT, sessionTimeout, this);
        Assert.assertTrue("Failed to establish zkclient connection!",
                clientConnected.await(sessionTimeout, TimeUnit.MILLISECONDS));
        Assert.assertEquals("Not able to configure the sessionTimeout values",
                expectedSessionTimeout, zk.getSessionTimeout());
        zk.close();
    }

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        f.startup(zks);
        Assert.assertTrue("waiting for server being up ", ClientBase
                .waitForServerUp(HOSTPORT, CONNECTION_TIMEOUT));


        CountdownWatcher watcher = new CountdownWatcher();
        ZooKeeper zk = new ZooKeeper(HOSTPORT, CONNECTION_TIMEOUT, watcher);
        watcher.waitForConnected(CONNECTION_TIMEOUT);


        List<String> joiners = new ArrayList<String>();
        joiners.add("server.2=localhost:1234:1235;1236");
        // generate some transactions that will get logged
        try {
            zk.reconfig(joiners, null, null, -1, new Stat());
            Assert.fail("Reconfiguration in standalone should trigger " +
                        "UnimplementedException");
        } catch (KeeperException.UnimplementedException ex) {
            // expected
        }
        zk.close();


        zks.shutdown();
        f.shutdown();
        Assert.assertTrue("waiting for server being down ", ClientBase
                .waitForServerDown(HOSTPORT, CONNECTION_TIMEOUT));

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        // Both servers 0 and 1 will have the .next config file, which means
        // for them that a reconfiguration was in progress when they failed
        // and the leader will complete it
        MainThread mt[] = new MainThread[SERVER_COUNT];
        ZooKeeper zk[] = new ZooKeeper[SERVER_COUNT];
        for (int i = 0; i < SERVER_COUNT - 1; i++) {
            mt[i] = new MainThread(i, clientPorts[i], currentQuorumCfgSection);
            // note that we should run the server, shut it down and only then
            // simulate a reconfig in progress by writing the temp file, but here no
            // other server is competing with them in FLE, so we can skip this step
            // (server 2 is booted after FLE ends)
            mt[i].writeTempDynamicConfigFile(nextQuorumCfgSection);
            mt[i].start();
            zk[i] = new ZooKeeper("127.0.0.1:" + clientPorts[i],
                    ClientBase.CONNECTION_TIMEOUT, this);
        }


        Assert.assertTrue("waiting for server 0 being up", ClientBase
                .waitForServerUp("127.0.0.1:" + clientPorts[0],
                        CONNECTION_TIMEOUT));
        Assert.assertTrue("waiting for server 1 being up", ClientBase
                .waitForServerUp("127.0.0.1:" + clientPorts[1],
                        CONNECTION_TIMEOUT));


        int leader = mt[0].main.quorumPeer.leader == null ? 1 : 0;


        // the new server's config is going to include itself and the current leader
        sb = new StringBuilder();
        sb.append(allServers.get(leader) + "\n");
        sb.append(allServers.get(2) + "\n");


        // suppose that this new server never heard about the reconfig proposal
        String newServerInitialConfig = sb.toString();
        mt[2] = new MainThread(2, clientPorts[2], newServerInitialConfig);
        mt[2].start();
        zk[2] = new ZooKeeper("127.0.0.1:" + clientPorts[2],
                ClientBase.CONNECTION_TIMEOUT, this);


        Assert.assertTrue("waiting for server 2 being up", ClientBase
                .waitForServerUp("127.0.0.1:" + clientPorts[2],
                        CONNECTION_TIMEOUT));

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        }
        sb.append("version=200000000\n"); // version of current config is 100000000
        nextQuorumCfgSection = sb.toString();


        MainThread mt[] = new MainThread[SERVER_COUNT];
        ZooKeeper zk[] = new ZooKeeper[SERVER_COUNT];


        // run servers 0 and 1 normally
        for (int i = 0; i < 2; i++) {
            mt[i] = new MainThread(i, oldClientPorts[i],
                    currentQuorumCfgSection);
            mt[i].start();
            zk[i] = new ZooKeeper("127.0.0.1:" + oldClientPorts[i],
                    ClientBase.CONNECTION_TIMEOUT, this);
        }


        for (int i = 0; i < 2; i++) {
            Assert.assertTrue("waiting for server " + i + " being up",
                    ClientBase.waitForServerUp(
                            "127.0.0.1:" + oldClientPorts[i],
                            CONNECTION_TIMEOUT * 2));
        }


        ReconfigTest.testNormalOperation(zk[0], zk[1]);


        // shut them down and then simulate a reboot with a reconfig in progress
        for (int i = 0; i < 2; i++) {
            mt[i].shutdown();
            zk[i].close();
        }


        for (int i = 0; i < 2; i++) {
            Assert.assertTrue(
                    "waiting for server " + i + " being up",
                    ClientBase.waitForServerDown("127.0.0.1:"
                            + oldClientPorts[i], CONNECTION_TIMEOUT * 2));
        }


        for (int i = 0; i < 2; i++) {
            mt[i].writeTempDynamicConfigFile(nextQuorumCfgSection);
            mt[i].start();
            zk[i] = new ZooKeeper("127.0.0.1:" + clientPorts[i],
                    ClientBase.CONNECTION_TIMEOUT, this);
        }


        // new members are initialized with current config + the new server
        for (int i = 2; i < SERVER_COUNT; i++) {
            mt[i] = new MainThread(i, clientPorts[i], currentQuorumCfg
                    + allServersNext.get(i));
            mt[i].start();
            zk[i] = new ZooKeeper("127.0.0.1:" + clientPorts[i],
                    ClientBase.CONNECTION_TIMEOUT, this);
        }


        for (int i = 0; i < SERVER_COUNT; i++) {
            Assert.assertTrue("waiting for server " + i + " being up",

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