io.kgraph.pregel

Class ZKUtils

java.lang.Object

io.kgraph.pregel.ZKUtils

public class ZKUtils
extends Object

Field Summary

Fields

Modifier and Type	Field and Description
static String	AGGREGATES
static String	BARRIERS
static String	GRAPHS_PATH
static String	GROUP
static String	LEADER
static String	PREGEL_PATH
static String	READY
static String	SUPERSTEP

Constructor Summary

Constructors

Constructor and Description
ZKUtils()

Method Summary

Modifier and Type	Method and Description
static void	addChild(org.apache.curator.framework.CuratorFramework curator, String id, PregelState pregelState, String child)
static void	addChild(org.apache.curator.framework.CuratorFramework curator, String id, PregelState pregelState, String child, org.apache.zookeeper.CreateMode createMode)
static void	addChild(org.apache.curator.framework.CuratorFramework curator, String rootPath, String child, org.apache.zookeeper.CreateMode createMode)
static void	addChild(org.apache.curator.framework.CuratorFramework curator, String rootPath, String child, org.apache.zookeeper.CreateMode createMode, byte[] data)
protected static String	aggregatePath(String id, int superstep)
protected static String	barrierPath(String id, PregelState pregelState)
static org.apache.curator.framework.CuratorFramework	createCurator(String zookeeperConnect)
static byte[]	getChildData(org.apache.curator.framework.CuratorFramework curator, String rootPath, String child)
static boolean	hasChild(org.apache.curator.framework.CuratorFramework curator, String id, PregelState pregelState, String child)
static boolean	hasChild(org.apache.curator.framework.CuratorFramework curator, String rootPath, String child)
static boolean	isReady(org.apache.curator.framework.CuratorFramework curator, String id, PregelState pregelState)
static PregelState	maybeCreateReadyToReceiveNode(org.apache.curator.framework.CuratorFramework curator, String id, PregelState pregelState, org.apache.curator.framework.recipes.cache.TreeCache treeCache)
static PregelState	maybeCreateReadyToSendNode(org.apache.curator.framework.CuratorFramework curator, String id, PregelState pregelState, org.apache.curator.framework.recipes.cache.TreeCache treeCache, int groupSize)
static void	removeChild(org.apache.curator.framework.CuratorFramework curator, String id, PregelState pregelState, String child)
static void	removeChild(org.apache.curator.framework.CuratorFramework curator, String rootPath, String child)
static void	removeRoot(org.apache.curator.framework.CuratorFramework curator, String id)
static void	updateChild(org.apache.curator.framework.CuratorFramework curator, String rootPath, String child, byte[] data)

Methods inherited from class java.lang.Object

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

Field Detail

GRAPHS_PATH

public static final String GRAPHS_PATH

See Also:

Constant Field Values

PREGEL_PATH

public static final String PREGEL_PATH

See Also:

Constant Field Values

AGGREGATES

public static final String AGGREGATES

See Also:

Constant Field Values

BARRIERS

public static final String BARRIERS

See Also:

Constant Field Values

GROUP

public static final String GROUP

See Also:

Constant Field Values

LEADER

public static final String LEADER

See Also:

Constant Field Values

READY

public static final String READY

See Also:

Constant Field Values

SUPERSTEP

public static final String SUPERSTEP

See Also:

Constant Field Values

Constructor Detail

ZKUtils

public ZKUtils()

Method Detail

createCurator

public static org.apache.curator.framework.CuratorFramework createCurator(String zookeeperConnect)

maybeCreateReadyToSendNode

public static PregelState maybeCreateReadyToSendNode(org.apache.curator.framework.CuratorFramework curator,
                                                     String id,
                                                     PregelState pregelState,
                                                     org.apache.curator.framework.recipes.cache.TreeCache treeCache,
                                                     int groupSize)
                                              throws Exception

Throws:

Exception

maybeCreateReadyToReceiveNode

public static PregelState maybeCreateReadyToReceiveNode(org.apache.curator.framework.CuratorFramework curator,
                                                        String id,
                                                        PregelState pregelState,
                                                        org.apache.curator.framework.recipes.cache.TreeCache treeCache)
                                                 throws Exception

Throws:

Exception

isReady

public static boolean isReady(org.apache.curator.framework.CuratorFramework curator,
                              String id,
                              PregelState pregelState)
                       throws Exception

Throws:

Exception

hasChild

public static boolean hasChild(org.apache.curator.framework.CuratorFramework curator,
                               String id,
                               PregelState pregelState,
                               String child)
                        throws Exception

Throws:

Exception

hasChild

public static boolean hasChild(org.apache.curator.framework.CuratorFramework curator,
                               String rootPath,
                               String child)
                        throws Exception

Throws:

Exception

addChild

public static void addChild(org.apache.curator.framework.CuratorFramework curator,
                            String id,
                            PregelState pregelState,
                            String child)
                     throws Exception

Throws:

Exception

addChild

public static void addChild(org.apache.curator.framework.CuratorFramework curator,
                            String id,
                            PregelState pregelState,
                            String child,
                            org.apache.zookeeper.CreateMode createMode)
                     throws Exception

Throws:

Exception

addChild

public static void addChild(org.apache.curator.framework.CuratorFramework curator,
                            String rootPath,
                            String child,
                            org.apache.zookeeper.CreateMode createMode)
                     throws Exception

Throws:

Exception

addChild

public static void addChild(org.apache.curator.framework.CuratorFramework curator,
                            String rootPath,
                            String child,
                            org.apache.zookeeper.CreateMode createMode,
                            byte[] data)
                     throws Exception

Throws:

Exception

getChildData

public static byte[] getChildData(org.apache.curator.framework.CuratorFramework curator,
                                  String rootPath,
                                  String child)
                           throws Exception

Throws:

Exception

updateChild

public static void updateChild(org.apache.curator.framework.CuratorFramework curator,
                               String rootPath,
                               String child,
                               byte[] data)
                        throws Exception

Throws:

Exception

removeChild

public static void removeChild(org.apache.curator.framework.CuratorFramework curator,
                               String id,
                               PregelState pregelState,
                               String child)
                        throws Exception

Throws:

Exception

removeChild

public static void removeChild(org.apache.curator.framework.CuratorFramework curator,
                               String rootPath,
                               String child)
                        throws Exception

Throws:

Exception

removeRoot

public static void removeRoot(org.apache.curator.framework.CuratorFramework curator,
                              String id)
                       throws Exception

Throws:

Exception

aggregatePath

protected static String aggregatePath(String id,
                                      int superstep)

barrierPath

protected static String barrierPath(String id,
                                    PregelState pregelState)