Package org.opennms.core.ipc.twin.common

Class TwinTracker

java.lang.Object

org.opennms.core.ipc.twin.common.TwinTracker

public class TwinTracker
extends Object

This Tracks Twin Object Updates for a given SessionKey (key, location). Twin Tracker consists of marshalled object( byte[]), version and sessionId. Version is incremented whenever object updates. sessionId is created only once per a SessionKey. TwinTracker is created and updated by publisher and only consumed by Subscriber. Subscriber will ignore any stale updates based on version but resets version whenever there is new SessionId.

Constructor Summary

Constructors

Constructor	Description
TwinTracker(byte[] obj)
TwinTracker(byte[] obj, int version, String sessionId)

Method Summary

Modifier and Type	Method	Description
byte[]	getObj()
String	getSessionId()
int	getVersion()
int	update(byte[] obj)

Methods inherited from class java.lang.Object

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

Constructor Detail

TwinTracker

public TwinTracker(byte[] obj)

TwinTracker

public TwinTracker(byte[] obj,
                   int version,
                   String sessionId)

Method Detail

getVersion

public int getVersion()

getObj

public byte[] getObj()

getSessionId

public String getSessionId()

update

public int update(byte[] obj)