org.apache.curator.framework.recipes.nodes

Class GroupMember

java.lang.Object

org.apache.curator.framework.recipes.nodes.GroupMember

All Implemented Interfaces:

Closeable, AutoCloseable

public class GroupMember
extends Object
implements Closeable

Group membership management. Adds this instance into a group and keeps a cache of members in the group

Constructor Summary

Constructors

Constructor and Description
GroupMember(org.apache.curator.framework.CuratorFramework client, String membershipPath, String thisId)
GroupMember(org.apache.curator.framework.CuratorFramework client, String membershipPath, String thisId, byte[] payload)

Method Summary

Modifier and Type	Method and Description
void	close() Have thisId leave the group and stop caching membership
Map<String,byte[]>	getCurrentMembers() Return the current view of membership.
String	idFromPath(String path) Given a full ZNode path, return the member ID
protected PathChildrenCache	newPathChildrenCache(org.apache.curator.framework.CuratorFramework client, String membershipPath)
protected PersistentEphemeralNode	newPersistentEphemeralNode(org.apache.curator.framework.CuratorFramework client, String membershipPath, String thisId, byte[] payload)
void	setThisData(byte[] data) Change the data stored in this instance's node
void	start() Start the group membership.

Methods inherited from class java.lang.Object

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

Constructor Detail

GroupMember

public GroupMember(org.apache.curator.framework.CuratorFramework client,
                   String membershipPath,
                   String thisId)

Parameters:

client - client

membershipPath - the path to use for membership

thisId - ID of this group member. MUST be unique for the group

GroupMember

public GroupMember(org.apache.curator.framework.CuratorFramework client,
                   String membershipPath,
                   String thisId,
                   byte[] payload)

Parameters:

client - client

membershipPath - the path to use for membership

thisId - ID of this group member. MUST be unique for the group

payload - the payload to write in our member node

Method Detail

start

public void start()

Start the group membership. Register thisId as a member and begin caching all members

setThisData

public void setThisData(byte[] data)

Change the data stored in this instance's node

Parameters:

data - new data (cannot be null)

close

public void close()

Have thisId leave the group and stop caching membership

Specified by:

close in interface Closeable

Specified by:

close in interface AutoCloseable

getCurrentMembers

public Map<String,byte[]> getCurrentMembers()

Return the current view of membership. The keys are the IDs of the members. The values are each member's payload

Returns:

membership

idFromPath

public String idFromPath(String path)

Given a full ZNode path, return the member ID

Parameters:

path - full ZNode path

Returns:

id

newPersistentEphemeralNode

protected PersistentEphemeralNode newPersistentEphemeralNode(org.apache.curator.framework.CuratorFramework client,
                                                             String membershipPath,
                                                             String thisId,
                                                             byte[] payload)

newPathChildrenCache

protected PathChildrenCache newPathChildrenCache(org.apache.curator.framework.CuratorFramework client,
                                                 String membershipPath)