Package org.apache.druid.curator

Class CuratorUtils

java.lang.Object

org.apache.druid.curator.CuratorUtils

public class CuratorUtils
extends Object

Field Summary

Fields

Modifier and Type	Field	Description
static int	DEFAULT_MAX_ZNODE_BYTES

Constructor Summary

Constructors

Constructor	Description
CuratorUtils()

Method Summary

Modifier and Type	Method	Description
static void	createIfNotExists(org.apache.curator.framework.CuratorFramework curatorFramework, String path, org.apache.zookeeper.CreateMode mode, byte[] rawBytes, int maxZnodeBytes)	Create znode if it does not already exist.
static void	createOrSet(org.apache.curator.framework.CuratorFramework curatorFramework, String path, org.apache.zookeeper.CreateMode mode, byte[] rawBytes, int maxZnodeBytes)	Create znode if it does not already exist.
static boolean	isChildAdded(org.apache.curator.framework.recipes.cache.PathChildrenCacheEvent event)

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_MAX_ZNODE_BYTES

public static final int DEFAULT_MAX_ZNODE_BYTES

See Also:

Constant Field Values

Constructor Detail

CuratorUtils

public CuratorUtils()

Method Detail

createIfNotExists

public static void createIfNotExists(org.apache.curator.framework.CuratorFramework curatorFramework,
                                     String path,
                                     org.apache.zookeeper.CreateMode mode,
                                     byte[] rawBytes,
                                     int maxZnodeBytes)
                              throws Exception

Create znode if it does not already exist. If it does already exist, this does nothing. In particular, the existing znode may have a different payload or create mode.

Parameters:

curatorFramework - curator

path - path

mode - create mode

rawBytes - payload

maxZnodeBytes - maximum payload size

Throws:

IllegalArgumentException - if rawBytes.length > maxZnodeBytes

Exception - if Curator throws an Exception

createOrSet

public static void createOrSet(org.apache.curator.framework.CuratorFramework curatorFramework,
                               String path,
                               org.apache.zookeeper.CreateMode mode,
                               byte[] rawBytes,
                               int maxZnodeBytes)
                        throws Exception

Create znode if it does not already exist. If it does already exist, update the payload (but not the create mode). If someone deletes the znode while we're trying to set it, just let it stay deleted.

Parameters:

curatorFramework - curator

path - path

mode - create mode

rawBytes - payload

maxZnodeBytes - maximum payload size

Throws:

IllegalArgumentException - if rawBytes.length > maxZnodeBytes

Exception - if Curator throws an Exception

isChildAdded

public static boolean isChildAdded(org.apache.curator.framework.recipes.cache.PathChildrenCacheEvent event)