Module org.apache.jena.dboe.transaction

Package org.apache.jena.dboe.transaction.txn

Class ComponentId

java.lang.Object

org.apache.jena.dboe.transaction.txn.ComponentId

public class ComponentId
extends Object

A ComponentId consists of two parts: a globally unique context (roughly - the domain where the ComponentId is valid) and an id within the context. Context is often a single coordinator but can be, for example, a distributed transaction coordinator.

Field Summary

Fields

Modifier and Type	Field	Description
static final int	SIZE

Method Summary

Modifier and Type	Method	Description
static ComponentId	alloc(String label, UUID coordinatorBase, int index)	Given a base componentId, create a derived (different) one.
static ComponentId	allocLocal()	Return a fresh ComponentId (not preserved across JVM runs)
static ComponentId	allocLocal(int id)
static ComponentId	create(UUID coordinatorBase, byte[] bytes)	Create a ComponentId from the given bytes
boolean	equals(Object obj)
UUID	getBaseId()
byte[]	getBytes()
int	hashCode()
String	label()
String	toString()

Methods inherited from class java.lang.Object

getClass, notify, notifyAll, wait, wait, wait

Field Details

SIZE

public static final int SIZE

See Also:

• Constant Field Values

Method Details

getBytes

public byte[] getBytes()

getBaseId

public UUID getBaseId()

label

public String label()

toString

public String toString()

Overrides:

toString in class Object

hashCode

public int hashCode()

Overrides:

hashCode in class Object

equals

public boolean equals(Object obj)

Overrides:

equals in class Object

create

public static ComponentId create(UUID coordinatorBase,
 byte[] bytes)

Create a ComponentId from the given bytes

alloc

public static ComponentId alloc(String label,
 UUID coordinatorBase,
 int index)

Given a base componentId, create a derived (different) one. This is deterministically done based on baseComponentId and index. The label is just for display purposes.

allocLocal

public static ComponentId allocLocal()

Return a fresh ComponentId (not preserved across JVM runs)

allocLocal

public static ComponentId allocLocal(int id)