com.sleepycat.je

Class CommitToken

java.lang.Object

com.sleepycat.je.CommitToken

All Implemented Interfaces:

Serializable, Comparable<CommitToken>

public class CommitToken
extends Object
implements Serializable, Comparable<CommitToken>

Defines an opaque token that can be used to identify a specific transaction commit in a replicated environment. It's unique relative to its environment.

Since CommitTokens identify a point in the serialized transaction schedule created on the master, it's meaningful to compare commit tokens, as described in the compareTo(CommitToken) method below. CommitTokens are obtained from Transaction.getCommitToken()

See Also:

CommitPointConsistencyPolicy, Serialized Form

Constructor Summary

Constructors

Constructor and Description
CommitToken(UUID repenvUUID, long vlsn)

Method Summary

Modifier and Type	Method and Description
int	compareTo(CommitToken other) Implements the Comparable interface.
boolean	equals(Object obj)
UUID	getRepenvUUID()
long	getVLSN()
int	hashCode()
String	toString()

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

CommitToken

public CommitToken(UUID repenvUUID,
                   long vlsn)

Parameters:

repenvUUID - identifies the replicated environment associated with the vlsn

vlsn - the vlsn representing the state of the database.

Method Detail

getRepenvUUID

public UUID getRepenvUUID()

getVLSN

public long getVLSN()

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

compareTo

public int compareTo(CommitToken other)

Implements the Comparable interface. Note that it's not meaningful to compare commit tokens across environments, since they represent states in unrelated serialized transaction streams.

CommitToken(1) < CommitToken(2) implies that CommitToken(1) represents a state of the database that preceded the state defined by CommitToken(2).

Specified by:

compareTo in interface Comparable<CommitToken>

Throws:

IllegalArgumentException - if two tokens from different environments are compared.

toString

public String toString()

Overrides:

toString in class Object