Example usage for org.apache.zookeeper WatchedEvent getType

Introduction

In this page you can find the example usage for org.apache.zookeeper WatchedEvent getType.

Prototype

public EventType getType() 

Source Link

Usage

From source file:org.apache.accumulo.server.logger.LogService.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    LOG.debug("event " + event.getPath() + " " + event.getType() + " " + event.getState());

    if (event.getState() == KeeperState.Expired) {
        LOG.warn("Logger lost zookeeper registration at " + event.getPath());
        service.stop();//from w  w  w.  j a v  a  2s .c  o m
    } else if (event.getType() == EventType.NodeDeleted) {
        LOG.info("Logger zookeeper entry lost " + event.getPath());
        String[] path = event.getPath().split("/");
        if (path[path.length - 1].equals(Constants.ZLOGGERS)
                && this.shutdownState == ShutdownState.REGISTERED) {
            LOG.fatal("Stopping server, zookeeper entry lost " + event.getPath());
            service.stop();
        }
    }
}

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From source file:org.apache.accumulo.server.master.Master.java

License:Apache License

public void run() throws IOException, InterruptedException, KeeperException {
    final String zroot = ZooUtil.getRoot(instance);

    getMasterLock(zroot + Constants.ZMASTER_LOCK);

    recoveryManager = new RecoveryManager(this);

    TableManager.getInstance().addObserver(this);

    StatusThread statusThread = new StatusThread();
    statusThread.start();//from  w  w w  . ja  va2s  .  co m

    MigrationCleanupThread migrationCleanupThread = new MigrationCleanupThread();
    migrationCleanupThread.start();

    tserverSet.startListeningForTabletServerChanges();

    // TODO: add shutdown for fate object - ACCUMULO-1307
    try {
        final AgeOffStore<Master> store = new AgeOffStore<Master>(
                new org.apache.accumulo.fate.ZooStore<Master>(ZooUtil.getRoot(instance) + Constants.ZFATE,
                        ZooReaderWriter.getRetryingInstance()),
                1000 * 60 * 60 * 8);

        int threads = this.getConfiguration().getConfiguration().getCount(Property.MASTER_FATE_THREADPOOL_SIZE);

        fate = new Fate<Master>(this, store, threads);

        SimpleTimer.getInstance().schedule(new Runnable() {

            @Override
            public void run() {
                store.ageOff();
            }
        }, 63000, 63000);
    } catch (KeeperException e) {
        throw new IOException(e);
    } catch (InterruptedException e) {
        throw new IOException(e);
    }

    ZooReaderWriter.getInstance().getChildren(zroot + Constants.ZRECOVERY, new Watcher() {
        @Override
        public void process(WatchedEvent event) {
            nextEvent.event("Noticed recovery changes", event.getType());
            try {
                // watcher only fires once, add it back
                ZooReaderWriter.getInstance().getChildren(zroot + Constants.ZRECOVERY, this);
            } catch (Exception e) {
                log.error("Failed to add log recovery watcher back", e);
            }
        }
    });

    Credentials systemCreds = SystemCredentials.get();
    watchers.add(new TabletGroupWatcher(this, new MetaDataStateStore(instance, systemCreds, this), null));
    watchers.add(new TabletGroupWatcher(this, new RootTabletStateStore(instance, systemCreds, this),
            watchers.get(0)));
    watchers.add(new TabletGroupWatcher(this, new ZooTabletStateStore(new ZooStore(zroot)), watchers.get(1)));
    for (TabletGroupWatcher watcher : watchers) {
        watcher.start();
    }

    Processor<Iface> processor = new Processor<Iface>(TraceWrap.service(new MasterClientServiceHandler()));
    ServerAddress sa = TServerUtils.startServer(getSystemConfiguration(), hostname, Property.MASTER_CLIENTPORT,
            processor, "Master", "Master Client Service Handler", null, Property.MASTER_MINTHREADS,
            Property.MASTER_THREADCHECK, Property.GENERAL_MAX_MESSAGE_SIZE);
    clientService = sa.server;
    String address = sa.address.toString();
    log.info("Setting master lock data to " + address);
    masterLock.replaceLockData(address.getBytes());

    while (!clientService.isServing()) {
        UtilWaitThread.sleep(100);
    }
    while (clientService.isServing()) {
        UtilWaitThread.sleep(500);
    }

    final long deadline = System.currentTimeMillis() + MAX_CLEANUP_WAIT_TIME;
    statusThread.join(remaining(deadline));

    // quit, even if the tablet servers somehow jam up and the watchers
    // don't stop
    for (TabletGroupWatcher watcher : watchers) {
        watcher.join(remaining(deadline));
    }
    log.info("exiting");
}

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From source file:org.apache.accumulo.server.security.delegation.ZooAuthenticationKeyWatcher.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    if (EventType.None == event.getType()) {
        switch (event.getState()) {
        case Disconnected: // Intentional fall through of case
        case Expired: // ZooReader is handling the Expiration of the original ZooKeeper object for us
            log.debug("ZooKeeper connection disconnected, clearing secret manager");
            secretManager.removeAllKeys();
            break;
        case SyncConnected:
            log.debug("ZooKeeper reconnected, updating secret manager");
            try {
                updateAuthKeys();/*from  w  w w  .  j  a  v  a  2s.  c  o  m*/
            } catch (KeeperException | InterruptedException e) {
                log.error("Failed to update secret manager after ZooKeeper reconnect");
            }
            break;
        default:
            log.warn("Unhandled: " + event);
        }

        // Nothing more to do for EventType.None
        return;
    }

    String path = event.getPath();
    if (null == path) {
        return;
    }

    if (!path.startsWith(baseNode)) {
        log.info("Ignoring event for path: {}", path);
        return;
    }

    try {
        if (path.equals(baseNode)) {
            processBaseNode(event);
        } else {
            processChildNode(event);
        }
    } catch (KeeperException | InterruptedException e) {
        log.error("Failed to communicate with ZooKeeper", e);
    }
}

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From source file:org.apache.accumulo.server.security.delegation.ZooAuthenticationKeyWatcher.java

License:Apache License

/**
 * Process the {@link WatchedEvent} for the base znode that the {@link AuthenticationKey}s are stored in.
 *//* w  w  w .j a  va  2 s  .  c  o m*/
void processBaseNode(WatchedEvent event) throws KeeperException, InterruptedException {
    switch (event.getType()) {
    case NodeDeleted:
        // The parent node was deleted, no children are possible, remove all keys
        log.debug("Parent ZNode was deleted, removing all AuthenticationKeys");
        secretManager.removeAllKeys();
        break;
    case None:
        // Not connected, don't care
        break;
    case NodeCreated: // intentional fall-through to NodeChildrenChanged
    case NodeChildrenChanged:
        // Process each child, and reset the watcher on the parent node. We know that the node exists
        updateAuthKeys(event.getPath());
        break;
    case NodeDataChanged:
        // The data on the parent changed. We aren't storing anything there so it's a noop
        break;
    default:
        log.warn("Unsupported event type: {}", event.getType());
        break;
    }
}

---

From source file:org.apache.accumulo.server.security.delegation.ZooAuthenticationKeyWatcher.java

License:Apache License

/**
 * Process the {@link WatchedEvent} for a node which represents an {@link AuthenticationKey}
 *///from w  w  w  .  jav a2 s.c  o m
void processChildNode(WatchedEvent event) throws KeeperException, InterruptedException {
    final String path = event.getPath();
    switch (event.getType()) {
    case NodeDeleted:
        // Key expired
        if (null == path) {
            log.error("Got null path for NodeDeleted event");
            return;
        }

        // Pull off the base ZK path and the '/' separator
        String childName = path.substring(baseNode.length() + 1);
        secretManager.removeKey(Integer.parseInt(childName));
        break;
    case None:
        // Not connected, don't care. We'll update when we're reconnected
        break;
    case NodeCreated:
        // New key created
        if (null == path) {
            log.error("Got null path for NodeCreated event");
            return;
        }
        // Get the data and reset the watcher
        AuthenticationKey key = deserializeKey(zk.getData(path, this, null));
        log.debug("Adding AuthenticationKey with keyId {}", key.getKeyId());
        secretManager.addKey(key);
        break;
    case NodeDataChanged:
        // Key changed, could happen on restart after not running Accumulo.
        if (null == path) {
            log.error("Got null path for NodeDataChanged event");
            return;
        }
        // Get the data and reset the watcher
        AuthenticationKey newKey = deserializeKey(zk.getData(path, this, null));
        // Will overwrite the old key if one exists
        secretManager.addKey(newKey);
        break;
    case NodeChildrenChanged:
        // no children for the children..
        log.warn("Unexpected NodeChildrenChanged event for authentication key node {}", path);
        break;
    default:
        log.warn("Unsupported event type: {}", event.getType());
        break;
    }
}

---

From source file:org.apache.accumulo.server.trace.TraceServer.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    log.debug("event " + event.getPath() + " " + event.getType() + " " + event.getState());
    if (event.getState() == KeeperState.Expired) {
        log.warn("Trace server lost zookeeper registration at " + event.getPath());
        server.stop();/*from w w  w.  j av  a 2s  . c  o  m*/
    } else if (event.getType() == EventType.NodeDeleted) {
        log.warn("Trace server zookeeper entry lost " + event.getPath());
        server.stop();
    }
    if (event.getPath() != null) {
        try {
            if (ZooReaderWriter.getInstance().exists(event.getPath(), this))
                return;
        } catch (Exception ex) {
            log.error(ex, ex);
        }
        log.warn("Trace server unable to reset watch on zookeeper registration");
        server.stop();
    }
}

---

From source file:org.apache.accumulo.server.zookeeper.DistributedWorkQueue.java

License:Apache License

public void startProcessing(final Processor processor, ThreadPoolExecutor executorService)
        throws KeeperException, InterruptedException {

    threadPool = executorService;/*from w w  w. j  a v  a2  s .  c om*/

    zoo.mkdirs(path);
    zoo.mkdirs(path + "/" + LOCKS_NODE);

    List<String> children = zoo.getChildren(path, new Watcher() {
        @Override
        public void process(WatchedEvent event) {
            switch (event.getType()) {
            case NodeChildrenChanged:
                if (event.getPath().equals(path))
                    try {
                        lookForWork(processor, zoo.getChildren(path, this));
                    } catch (KeeperException e) {
                        log.error("Failed to look for work", e);
                    } catch (InterruptedException e) {
                        log.info("Interrupted looking for work", e);
                    }
                else
                    log.info("Unexpected path for NodeChildrenChanged event " + event.getPath());
                break;
            case NodeCreated:
            case NodeDataChanged:
            case NodeDeleted:
            case None:
                log.info("Got unexpected zookeeper event: " + event.getType() + " for " + path);
                break;

            }
        }
    });

    lookForWork(processor, children);

    // Add a little jitter to avoid all the tservers slamming zookeeper at once
    SimpleTimer.getInstance(config).schedule(new Runnable() {
        @Override
        public void run() {
            log.debug("Looking for work in " + path);
            try {
                lookForWork(processor, zoo.getChildren(path));
            } catch (KeeperException e) {
                log.error("Failed to look for work", e);
            } catch (InterruptedException e) {
                log.info("Interrupted looking for work", e);
            }
        }
    }, timerInitialDelay, timerPeriod);
}

---

From source file:org.apache.accumulo.server.zookeeper.DistributedWorkQueue.java

License:Apache License

public void waitUntilDone(Set<String> workIDs) throws KeeperException, InterruptedException {

    final Object condVar = new Object();

    Watcher watcher = new Watcher() {
        @Override/*from   w  w w.  j a v a 2  s.  c  om*/
        public void process(WatchedEvent event) {
            switch (event.getType()) {
            case NodeChildrenChanged:
                synchronized (condVar) {
                    condVar.notify();
                }
                break;
            case NodeCreated:
            case NodeDataChanged:
            case NodeDeleted:
            case None:
                log.info("Got unexpected zookeeper event: " + event.getType() + " for " + path);
                break;

            }
        }
    };

    List<String> children = zoo.getChildren(path, watcher);

    while (!Collections.disjoint(children, workIDs)) {
        synchronized (condVar) {
            condVar.wait(10000);
        }
        children = zoo.getChildren(path, watcher);
    }
}

---

From source file:org.apache.accumulo.tracer.TraceServer.java

License:Apache License

@Override
public void process(WatchedEvent event) {
    log.debug("event " + event.getPath() + " " + event.getType() + " " + event.getState());
    if (event.getState() == KeeperState.Expired) {
        log.warn("Trace server lost zookeeper registration at " + event.getPath());
        server.stop();//from ww  w  . jav a2  s.c o m
    } else if (event.getType() == EventType.NodeDeleted) {
        log.warn("Trace server zookeeper entry lost " + event.getPath());
        server.stop();
    }
    if (event.getPath() != null) {
        try {
            if (ZooReaderWriter.getInstance().exists(event.getPath(), this))
                return;
        } catch (Exception ex) {
            log.error("{}", ex.getMessage(), ex);
        }
        log.warn("Trace server unable to reset watch on zookeeper registration");
        server.stop();
    }
}

---

From source file:org.apache.airavata.gfac.core.cpi.BetterGfacImpl.java

License:Apache License

public void process(WatchedEvent watchedEvent) {
    if (Event.EventType.NodeDataChanged.equals(watchedEvent.getType())) {
        // node data is changed, this means node is cancelled.
        log.info("Experiment is cancelled with this path:" + watchedEvent.getPath());
        this.cancelled = true;
    }/*from  ww w.j  a  v a  2 s . co  m*/
}

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