org.lable.oss.uniqueid.zookeeper.connection

Class ZooKeeperConnection

java.lang.Object

org.lable.oss.uniqueid.zookeeper.connection.ZooKeeperConnection

public class ZooKeeperConnection
extends Object

Singleton for a ZooKeeper connection object instance.

Constructor Summary

Constructors

Constructor and Description
ZooKeeperConnection(String quorumAddresses)

Method Summary

Modifier and Type	Method and Description
void	deregisterObserver(ZooKeeperConnectionObserver observer)
org.apache.zookeeper.ZooKeeper	get() Get the connection to the ZooKeeper quorum maintained by this class.
org.apache.zookeeper.ZooKeeper	getActiveConnection() Get a connection to the ZooKeeper quorum that is guaranteed to be in a connected state.
void	registerObserver(ZooKeeperConnectionObserver observer)
void	reset() Remove any preexisting ZooKeeper connection instance.
void	shutdown()

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Constructor Detail

ZooKeeperConnection

public ZooKeeperConnection(String quorumAddresses)
                    throws IOException

Throws:

IOException

Method Detail

getActiveConnection

public org.apache.zookeeper.ZooKeeper getActiveConnection()
                                                   throws IOException

Get a connection to the ZooKeeper quorum that is guaranteed to be in a connected state. If this fails, an IOException is thrown.

Returns:

An active connection to the ZooKeeper quorum.

Throws:

IOException

get

public org.apache.zookeeper.ZooKeeper get()
                                   throws IOException

Get the connection to the ZooKeeper quorum maintained by this class. There is no guarantee that it is in a connected state (use getActiveConnection() if you require this guarantee).

Returns:

A connection to the ZooKeeper quorum.

Throws:

IOException

shutdown

public void shutdown()

registerObserver

public void registerObserver(ZooKeeperConnectionObserver observer)

deregisterObserver

public void deregisterObserver(ZooKeeperConnectionObserver observer)

reset

public void reset()

Remove any preexisting ZooKeeper connection instance.

This method should be called when the connection to the ZooKeeper is expired, so a subsequent call to get() will establish a new connection.