Example usage for org.apache.zookeeper KeeperException code

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Usage

From source file:com.netflix.curator.framework.imps.CuratorTransactionImpl.java

License:Apache License

private List<OpResult> doOperation(AtomicBoolean firstTime) throws Exception {
    boolean localFirstTime = firstTime.getAndSet(false);
    if (!localFirstTime) {

    }/*  w  ww .  j a va 2s .  co  m*/

    List<OpResult> opResults = client.getZooKeeper().multi(transaction);
    if (opResults.size() > 0) {
        OpResult firstResult = opResults.get(0);
        if (firstResult.getType() == ZooDefs.OpCode.error) {
            OpResult.ErrorResult error = (OpResult.ErrorResult) firstResult;
            KeeperException.Code code = KeeperException.Code.get(error.getErr());
            if (code == null) {
                code = KeeperException.Code.UNIMPLEMENTED;
            }
            throw KeeperException.create(code);
        }
    }
    return opResults;
}

From source file:com.netflix.curator.framework.imps.GetDataBuilderImpl.java

License:Apache License

@Override
public void performBackgroundOperation(final OperationAndData<String> operationAndData) throws Exception {
    final TimeTrace trace = client.getZookeeperClient().startTracer("GetDataBuilderImpl-Background");
    AsyncCallback.DataCallback callback = new AsyncCallback.DataCallback() {
        @Override/*from   ww w  .  ja v  a2  s .  co m*/
        public void processResult(int rc, String path, Object ctx, byte[] data, Stat stat) {
            trace.commit();
            if (decompress && (data != null)) {
                try {
                    data = client.getCompressionProvider().decompress(path, data);
                } catch (Exception e) {
                    log.error("Decompressing for path: " + path, e);
                    rc = KeeperException.Code.DATAINCONSISTENCY.intValue();
                }
            }
            CuratorEvent event = new CuratorEventImpl(client, CuratorEventType.GET_DATA, rc, path, null, ctx,
                    stat, data, null, null, null);
            client.processBackgroundOperation(operationAndData, event);
        }
    };
    if (watching.isWatched()) {
        client.getZooKeeper().getData(operationAndData.getData(), true, callback, backgrounding.getContext());
    } else {
        client.getZooKeeper().getData(operationAndData.getData(), watching.getWatcher(), callback,
                backgrounding.getContext());
    }
}

From source file:com.netflix.curator.framework.recipes.cache.NodeCache.java

License:Apache License

private void processBackgroundResult(CuratorEvent event) throws Exception {
    switch (event.getType()) {
    case GET_DATA: {
        if (event.getResultCode() == KeeperException.Code.OK.intValue()) {
            ChildData childData = new ChildData(path, event.getStat(), event.getData());
            setNewData(childData);//from w ww  . j a va 2  s  . c  o m
        }
        break;
    }

    case EXISTS: {
        if (event.getResultCode() == KeeperException.Code.NONODE.intValue()) {
            setNewData(null);
        } else if (event.getResultCode() == KeeperException.Code.OK.intValue()) {
            if (dataIsCompressed) {
                client.getData().decompressed().usingWatcher(watcher).inBackground(backgroundCallback)
                        .forPath(path);
            } else {
                client.getData().usingWatcher(watcher).inBackground(backgroundCallback).forPath(path);
            }
        }
        break;
    }
    }
}

From source file:com.netflix.curator.framework.recipes.cache.PathChildrenCache.java

License:Apache License

private void applyNewData(String fullPath, int resultCode, Stat stat, byte[] bytes) {
    if (resultCode == KeeperException.Code.OK.intValue()) // otherwise - node must have dropped or something - we should be getting another event
    {//from  www.ja va  2  s . co m
        ChildData data = new ChildData(fullPath, stat, bytes);
        ChildData previousData = currentData.put(fullPath, data);
        if (previousData == null) // i.e. new
        {
            listenerEvents.offer(new PathChildrenCacheEvent(PathChildrenCacheEvent.Type.CHILD_ADDED, data));
        } else if (previousData.getStat().getVersion() != stat.getVersion()) {
            listenerEvents.offer(new PathChildrenCacheEvent(PathChildrenCacheEvent.Type.CHILD_UPDATED, data));
        }
    }
}

From source file:com.netflix.curator.RetryLoop.java

License:Apache License

/**
 * Utility - return true if the given exception is retry-able
 *
 * @param exception exception to check/*from   ww w .j  a v a  2 s.  c o  m*/
 * @return true/false
 */
public static boolean isRetryException(Throwable exception) {
    if (exception instanceof KeeperException) {
        KeeperException keeperException = (KeeperException) exception;
        return shouldRetry(keeperException.code().intValue());
    }
    return false;
}

From source file:com.netflix.curator.RetryLoop.java

License:Apache License

/**
 * Utility - return true if the given Zookeeper result code is retry-able
 *
 * @param rc result code//from   w  w w  . j a  v  a 2  s.  co m
 * @return true/false
 */
public static boolean shouldRetry(int rc) {
    return (rc == KeeperException.Code.CONNECTIONLOSS.intValue())
            || (rc == KeeperException.Code.OPERATIONTIMEOUT.intValue())
            || (rc == KeeperException.Code.SESSIONMOVED.intValue())
            || (rc == KeeperException.Code.SESSIONEXPIRED.intValue());
}

From source file:com.objectdriven.maven.zookeeper.sample.DataMonitor.java

public void process(WatchedEvent event) {
    String path = event.getPath();
    if (event.getType() == Event.EventType.None) {
        // We are are being told that the state of the
        // connection has changed
        switch (event.getState()) {
        case SyncConnected:
            // In this particular example we don't need to do anything
            // here - watches are automatically re-registered with
            // server and any watches triggered while the client was
            // disconnected will be delivered (in order of course)
            break;
        case Expired:
            // It's all over
            dead = true;//from w  w  w . j  a  v a 2s  .  c  o  m
            listener.closing(KeeperException.Code.SessionExpired);
            break;
        }
    } else {
        if (path != null && path.equals(znode)) {
            // Something has changed on the node, let's find out
            zk.exists(znode, true, this, null);
        }
    }
    if (chainedWatcher != null) {
        chainedWatcher.process(event);
    }
}

From source file:com.proofpoint.zookeeper.ChildDataWatcher.java

License:Apache License

private void processGetData(ZookeeperEvent event) throws Exception {
    log.debug("ChildDataCallback: [rc = %d] %s, %s", event.getResultCode().intValue(), path, event.getStat());
    if (isStarted.get() && event.getResultCode() == KeeperException.Code.OK) { // check for case where the child disappeared since we got the childrenChanged notification

        String child = event.getContext().toString();
        Stat currentStat;/*from   w w w  .  j a  v  a 2 s .c o  m*/

        synchronized (elements) {
            currentStat = elements.get(child);
            elements.put(child, event.getStat());
        }

        if (currentStat == SENTINEL) {
            notifyAdded(child, event.getData());
        } else {
            notifyUpdated(child, event.getData(), event.getStat().getVersion());
        }
    }
}

From source file:com.proofpoint.zookeeper.ChildDataWatcher.java

License:Apache License

private void processGetChildren(ZookeeperEvent event) throws Exception {
    log.debug("ChildrenListCallBack: [rc = %d], %s, %s", event.getResultCode().intValue(), event.getPath(),
            event.getChildren());/*  w  w w  .  ja v  a2  s  . com*/
    if (isStarted.get() && event.getResultCode() == KeeperException.Code.OK) {
        synchronized (elements) {
            Set<String> added = Sets
                    .newHashSet(difference(Sets.newHashSet(event.getChildren()), elements.keySet()));
            Set<String> removed = Sets
                    .newHashSet(difference(elements.keySet(), Sets.newHashSet(event.getChildren())));

            for (String child : added) {
                String fullPath = path + "/" + child;
                elements.put(child, SENTINEL); // mark this child as tentative -- notifications will be sent once we get the data

                log.debug("Getting data: %s", fullPath);
                client.usingWatcher(this).inBackground(backgroundKey).withContext(child).getData(fullPath);
            }

            // removed
            for (String child : removed) {
                // don't notify if the node was removed before we got a chance to get the data
                // For all intents and purposes, the node never existed
                if (elements.remove(child) != SENTINEL) {
                    notifyRemoved(child);
                }
            }
        }
    }
}

From source file:com.proofpoint.zookeeper.RetryHandler.java

License:Apache License

T start() throws Exception {
    if (client.getState().isZombie()) {
        return null;
    }//  w w w . j av a  2  s .  c  o  m

    while (!client.getState().ensureConnected()) {
        if (!shouldRetry(KeeperException.Code.CONNECTIONLOSS)) {
            throw new KeeperException.ConnectionLossException();
        }
    }

    for (;;) {
        try {
            return proc.call(client.getState().ensureCreated(), this);
        } catch (KeeperException e) {
            if (!shouldRetry(e.code())) {
                throw e;
            }
        }
    }
}