com.amazon.carbonado.sequence

Class SequenceValueProducerPool

java.lang.Object

com.amazon.carbonado.util.AbstractPool<java.lang.String,SequenceValueProducer,RepositoryException>

com.amazon.carbonado.sequence.SequenceValueProducerPool

public abstract class SequenceValueProducerPool
extends AbstractPool<java.lang.String,SequenceValueProducer,RepositoryException>

A concurrent pool of strongly referenced SequenceValueProducer instances mapped by name. SequenceValueProducer instances are lazily created and pooled.

Since:

1.2

Author:

bcastill, Brian S O'Neill

Constructor Summary

Constructors

Constructor and Description
SequenceValueProducerPool()

Method Summary

Methods

Modifier and Type	Method and Description
protected SequenceValueProducer	create(java.lang.String name) Return a new value instance.
protected abstract SequenceValueProducer	createSequenceValueProducer(java.lang.String name)
SequenceValueProducer	get(java.lang.String name) Returns a SequenceValueProducer instance for the given name, which is lazily created and pooled.
void	returnReservedValues(org.apache.commons.logging.Log log) Returns reserved values for all SequenceValueProducers.

Methods inherited from class com.amazon.carbonado.util.AbstractPool

clear, remove, values

Methods inherited from class java.lang.Object

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

Constructor Detail

SequenceValueProducerPool

public SequenceValueProducerPool()

Method Detail

get

public SequenceValueProducer get(java.lang.String name)
                          throws RepositoryException

Returns a SequenceValueProducer instance for the given name, which is lazily created and pooled. If multiple threads are requesting upon the same name concurrently, at most one thread attempts to lazily create the SequenceValueProducer. The others wait for it to become available.

Overrides:

get in class AbstractPool<java.lang.String,SequenceValueProducer,RepositoryException>

Parameters:

name - name of sequence

Throws:

RepositoryException

returnReservedValues

public void returnReservedValues(org.apache.commons.logging.Log log)

Returns reserved values for all SequenceValueProducers.

Parameters:

log - optional log to report errors; uses default log if null

create

protected final SequenceValueProducer create(java.lang.String name)
                                      throws RepositoryException

Description copied from class: AbstractPool

Return a new value instance.

Specified by:

create in class AbstractPool<java.lang.String,SequenceValueProducer,RepositoryException>

Throws:

RepositoryException

createSequenceValueProducer

protected abstract SequenceValueProducer createSequenceValueProducer(java.lang.String name)
                                                              throws RepositoryException

Throws:

RepositoryException