Example usage for org.apache.zookeeper AsyncCallback.Children2Callback AsyncCallback.Children2Callback

Introduction

In this page you can find the example usage for org.apache.zookeeper AsyncCallback.Children2Callback AsyncCallback.Children2Callback.

Prototype

AsyncCallback.Children2Callback

Source Link

Usage

From source file:org.midonet.midolman.state.ZkDirectory.java

License:Apache License

@Override
public void asyncGetChildren(String relativePath, final DirectoryCallback<Set<String>> cb,
        TypedWatcher watcher) {//w  w  w. ja v a  2 s . com
    zk.getZooKeeper().getChildren(getAbsolutePath(relativePath), wrapCallback(watcher),
            new AsyncCallback.Children2Callback() {
                @Override
                public void processResult(int rc, String path, Object ctx, List<String> children, Stat stat) {
                    if (rc == KeeperException.Code.OK.intValue()) {
                        cb.onSuccess(new HashSet<String>(children));
                    } else {
                        cb.onError(KeeperException.create(KeeperException.Code.get(rc), path));
                    }
                }
            }, null);
}

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From source file:org.rioproject.zookeeper.client.GroupManagement.java

License:Apache License

public void delete(final String groupName) {
    if (groupName == null)
        throw new IllegalArgumentException("groupName must not be null");
    String path = String.format("/%s", groupName);
    zooKeeper.getChildren(path, false, new AsyncCallback.Children2Callback() {
        public void processResult(int rc, String path, Object context, List<String> children, Stat stat) {
            try {
                for (String child : children) {
                    zooKeeper.delete(String.format("%s/%s", path, child), -1);
                }//from  ww  w .jav  a 2  s . com
                zooKeeper.delete(path, -1);
            } catch (KeeperException.NoNodeException e) {
                logger.warn("Group {} does not exist", groupName);
            } catch (InterruptedException e) {
                logger.warn("Transaction was interrupted", e);
            } catch (KeeperException e) {
                logger.warn("Server error", e);
            }
        }
    }, null);
}

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From source file:org.rioproject.zookeeper.watcher.ZooKeeperServiceWatcher.java

License:Apache License

/**
 * Add a service to watch.//from   ww  w  .  jav  a 2 s. com
 *
 * @param zNode The ZooKeeper node (zNode), must not be {@code null}.
 * @param listener The {@link FaultDetectionListener} to be notified if the service fails.
 *
 * @throws IllegalArgumentException if the {@code zNode} or {@code listener} is {@code null}.
 */
public void addService(final String zNode, final FaultDetectionListener<String> listener) {
    if (zNode == null)
        throw new IllegalArgumentException("zNode can not be null");
    if (listener == null)
        throw new IllegalArgumentException("listener can not be null");
    zooKeeper.getChildren(zNode, true, new AsyncCallback.Children2Callback() {
        public void processResult(int rc, String path, Object o, List<String> strings, Stat stat) {
            if (KeeperException.Code.OK.equals(KeeperException.Code.get(rc))) {
                services.put(zNode, listener);
            } else {
                logger.error("Unable to add watch for {}, {}", zNode, KeeperException.Code.get(rc));
            }
        }
    }, null);
}

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