org.eclipse.smila.zookeeper
Interface ZooKeeperService

All Known Implementing Classes:

ZooKeeperServiceImpl

public interface ZooKeeperService

Interface of ZooKeeper management service.

Field Summary

static java.lang.String

BUNDLE_ID name of bundle.

Method Summary

void	closeClient() close the client quietly.
ZooKeeper	getClient() get zookeeper client, create if it doesn't exist.
long	getFailSafetyLevel()
AnyMap	getServerState()
void	registerWatcher(Watcher watcher) register a watcher for ZooKeeper events.
void	unregisterWatcher(Watcher watcher) unregister a watcher for ZooKeeper events.
void	waitForClientConnected() wait until the zookeeper client is (re)connected.

Field Detail

BUNDLE_ID

static final java.lang.String BUNDLE_ID

name of bundle.

See Also:

Constant Field Values

Method Detail

getClient

ZooKeeper getClient()
                    throws java.io.IOException,
                           ClusterConfigException

get zookeeper client, create if it doesn't exist.

Returns:

client

Throws:

java.io.IOException - error creating client

ClusterConfigException - if the cluster configuration cannot be read

closeClient

void closeClient()

close the client quietly.

getFailSafetyLevel

long getFailSafetyLevel()

Returns:

number of nodes that may fail without ZooKeeper service stopping to work.

getServerState

AnyMap getServerState()

Returns:

zookeeper server/cluster state for monitoring.

waitForClientConnected

void waitForClientConnected()

wait until the zookeeper client is (re)connected.

registerWatcher

void registerWatcher(Watcher watcher)

register a watcher for ZooKeeper events.

unregisterWatcher

void unregisterWatcher(Watcher watcher)

unregister a watcher for ZooKeeper events.