org.apache.hadoop.hbase.replication
Class ReplicationStateZKBase

java.lang.Object
  org.apache.hadoop.hbase.replication.ReplicationStateZKBase

Direct Known Subclasses:

ReplicationPeersZKImpl, ReplicationQueuesClientZKImpl, ReplicationQueuesZKImpl, ReplicationStateImpl, ReplicationZookeeper

public abstract class ReplicationStateZKBase
extends Object

This is a base class for maintaining replication state in zookeeper.

Field Summary

protected Abortable	abortable
protected org.apache.hadoop.conf.Configuration	conf
protected static byte[]	DISABLED_ZNODE_BYTES
static byte[]	ENABLED_ZNODE_BYTES
protected String	ourClusterKey The cluster key of the local cluster
protected String	peerStateNodeName The name of the znode that contains the replication status of a remote slave (i.e.
protected String	peersZNode The name of the znode that contains a list of all remote slave (i.e.
protected String	queuesZNode The name of the znode that contains all replication queues
protected String	replicationZNode The name of the base znode that contains all replication state.
protected String	stateZNode The name of the znode that contains the replication status of the local cluster.
protected ZooKeeperWatcher	zookeeper

Constructor Summary

ReplicationStateZKBase(ZooKeeperWatcher zookeeper, org.apache.hadoop.conf.Configuration conf, Abortable abortable)

Method Summary

List<String>	getListOfReplicators()
boolean	peerExists(String id)
protected static byte[]	toByteArray(ZooKeeperProtos.ReplicationState.State state)

Methods inherited from class java.lang.Object

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

Field Detail

peerStateNodeName

protected final String peerStateNodeName

The name of the znode that contains the replication status of a remote slave (i.e. peer) cluster.

stateZNode

protected final String stateZNode

The name of the znode that contains the replication status of the local cluster.

replicationZNode

protected final String replicationZNode

The name of the base znode that contains all replication state.

peersZNode

protected final String peersZNode

The name of the znode that contains a list of all remote slave (i.e. peer) clusters.

queuesZNode

protected final String queuesZNode

The name of the znode that contains all replication queues

ourClusterKey

protected final String ourClusterKey

The cluster key of the local cluster

zookeeper

protected final ZooKeeperWatcher zookeeper

conf

protected final org.apache.hadoop.conf.Configuration conf

abortable

protected final Abortable abortable

ENABLED_ZNODE_BYTES

public static final byte[] ENABLED_ZNODE_BYTES

DISABLED_ZNODE_BYTES

protected static final byte[] DISABLED_ZNODE_BYTES

Constructor Detail

ReplicationStateZKBase

public ReplicationStateZKBase(ZooKeeperWatcher zookeeper,
                              org.apache.hadoop.conf.Configuration conf,
                              Abortable abortable)

Method Detail

getListOfReplicators

public List<String> getListOfReplicators()

toByteArray

protected static byte[] toByteArray(ZooKeeperProtos.ReplicationState.State state)

Parameters:

state -

Returns:

Serialized protobuf of state with pb magic prefix prepended suitable for use as content of either the cluster state znode -- whether or not we should be replicating kept in /hbase/replication/state -- or as content of a peer-state znode under a peer cluster id as in /hbase/replication/peers/PEER_ID/peer-state.

peerExists

public boolean peerExists(String id)
                   throws org.apache.zookeeper.KeeperException

Throws:

org.apache.zookeeper.KeeperException