com.spotify.helios.master

Class MasterZooKeeperRegistrar

java.lang.Object

com.spotify.helios.master.MasterZooKeeperRegistrar

All Implemented Interfaces:

ZooKeeperRegistrar

public class MasterZooKeeperRegistrar
extends Object
implements ZooKeeperRegistrar

Responsible for registering the Helios master with ZooKeeper. Will continue to attempt to register in the background in the event that ZK is down when the master starts.

Constructor Summary

Constructors

Constructor and Description
MasterZooKeeperRegistrar(String name)

Method Summary

Modifier and Type	Method and Description
void	shutDown() Called upon shutdown
void	startUp() Called upon startup
boolean	tryToRegister(ZooKeeperClient client) Called when ZK client connects.

Methods inherited from class java.lang.Object

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

Constructor Detail

MasterZooKeeperRegistrar

public MasterZooKeeperRegistrar(String name)

Method Detail

startUp

public void startUp()
             throws Exception

Description copied from interface: ZooKeeperRegistrar

Called upon startup

Specified by:

startUp in interface ZooKeeperRegistrar

Throws:

Exception - If an unexpected error occurs.

shutDown

public void shutDown()
              throws Exception

Description copied from interface: ZooKeeperRegistrar

Called upon shutdown

Specified by:

shutDown in interface ZooKeeperRegistrar

Throws:

Exception - If an unexpected error occurs.

tryToRegister

public boolean tryToRegister(ZooKeeperClient client)
                      throws org.apache.zookeeper.KeeperException

Description copied from interface: ZooKeeperRegistrar

Called when ZK client connects. Handler should attempt to do on connection initialization here.

Specified by:

tryToRegister in interface ZooKeeperRegistrar

Parameters:

client - The zookeeper client.

Returns:

if registration was successful

Throws:

org.apache.zookeeper.KeeperException - If an unexpected zookeeper error occurs.