Package org.nuxeo.ecm.platform.uidgen

Class JPAUIDSequencerImpl

java.lang.Object

org.nuxeo.ecm.core.uidgen.AbstractUIDSequencer

org.nuxeo.ecm.platform.uidgen.JPAUIDSequencerImpl

All Implemented Interfaces:

UIDSequencer

public class JPAUIDSequencerImpl
extends AbstractUIDSequencer

This implementation uses a static persistence provider to be able to instantiate this class without passing by Framework.getService -> this is to avoid potential problems do to sequencer factories. Anyway sequencer factories should be removed (I don't think they are really needed).

Author:

Bogdan Stefanescu

Nested Class Summary

Nested Classes

Modifier and Type	Class	Description
protected class	JPAUIDSequencerImpl.SeqRunner

Field Summary

Fields

Modifier and Type	Field	Description
static final long	KEEP_ALIVE_TIME
static final int	MAX_POOL_SIZE
static final int	POOL_SIZE
static final int	QUEUE_SIZE
protected ThreadPoolExecutor	tpe

Fields inherited from class org.nuxeo.ecm.core.uidgen.AbstractUIDSequencer

name

Constructor Summary

Constructors

Constructor	Description
JPAUIDSequencerImpl()

Method Summary

Modifier and Type	Method	Description
protected static void	activatePersistenceProvider()
void	dispose()	Must be called when the service is no longer needed
protected int	doGetNext(String key)
protected int	getNext(javax.persistence.EntityManager em, String key)
long	getNextLong(String key)	For the given key returns the incremented UID which is also stored in the same sequence entry.
protected PersistenceProvider	getOrCreatePersistenceProvider()
void	init()	Init Sequencer
void	initSequence(String key, long id)	Initializes the sequencer with the given key to at least the given long id.

Methods inherited from class org.nuxeo.ecm.core.uidgen.AbstractUIDSequencer

getName, setName

Methods inherited from class java.lang.Object

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

Methods inherited from interface org.nuxeo.ecm.core.uidgen.UIDSequencer

getNextBlock

Field Details

POOL_SIZE

public static final int POOL_SIZE

See Also:

• Constant Field Values

MAX_POOL_SIZE

public static final int MAX_POOL_SIZE

See Also:

• Constant Field Values

KEEP_ALIVE_TIME

public static final long KEEP_ALIVE_TIME

See Also:

• Constant Field Values

QUEUE_SIZE

public static final int QUEUE_SIZE

See Also:

• Constant Field Values

tpe

protected ThreadPoolExecutor tpe

Constructor Details

JPAUIDSequencerImpl

public JPAUIDSequencerImpl()

Method Details

init

public void init()

Description copied from interface: UIDSequencer

Init Sequencer

dispose

public void dispose()

Must be called when the service is no longer needed

getOrCreatePersistenceProvider

protected PersistenceProvider getOrCreatePersistenceProvider()

activatePersistenceProvider

protected static void activatePersistenceProvider()

initSequence

public void initSequence(String key,
 long id)

Description copied from interface: UIDSequencer

Initializes the sequencer with the given key to at least the given long id.

A sequence can only be incremented, so if its current id is greater than the given id the sequence won't be decremented to reach the given id.

Specified by:

initSequence in interface UIDSequencer

Overrides:

initSequence in class AbstractUIDSequencer

getNextLong

public long getNextLong(String key)

Description copied from interface: UIDSequencer

For the given key returns the incremented UID which is also stored in the same sequence entry. This is a "one time use" function for a document.

doGetNext

protected int doGetNext(String key)

getNext

protected int getNext(javax.persistence.EntityManager em,
 String key)