org.batoo.jpa.jdbc.generator

Class SequenceQueue

java.lang.Object

java.util.AbstractCollection<E>

java.util.AbstractQueue<E>

java.util.concurrent.LinkedBlockingQueue<Long>

org.batoo.jpa.jdbc.generator.IdQueue

org.batoo.jpa.jdbc.generator.SequenceQueue

All Implemented Interfaces:

Serializable, Iterable<Long>, Collection<Long>, BlockingQueue<Long>, Queue<Long>

public class SequenceQueue
extends IdQueue

A Queue that tops up the queue by allocation size sequences when its capacity drops to 1 / 2 of allocation size.

Since:

2.0.0

Author:

hceylan

See Also:

Serialized Form

Constructor Summary

Constructors

Constructor and Description
SequenceQueue(JdbcAdaptor jdbcAdaptor, DataSource datasource, ExecutorService idExecuter, String sequenceName, int allocationSize)

Method Summary

Methods

Modifier and Type	Method and Description
protected Long	getNextId() Returns the next value from the database.

Methods inherited from class org.batoo.jpa.jdbc.generator.IdQueue

doTopUp, poll

Methods inherited from class java.util.concurrent.LinkedBlockingQueue

clear, contains, drainTo, drainTo, iterator, offer, offer, peek, poll, put, remainingCapacity, remove, size, take, toArray, toArray, toString

Methods inherited from class java.util.AbstractQueue

add, addAll, element, remove

Methods inherited from class java.util.AbstractCollection

containsAll, isEmpty, removeAll, retainAll

Methods inherited from class java.lang.Object

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

Methods inherited from interface java.util.concurrent.BlockingQueue

add

Methods inherited from interface java.util.Queue

element, remove

Methods inherited from interface java.util.Collection

addAll, containsAll, equals, hashCode, isEmpty, removeAll, retainAll

Constructor Detail

SequenceQueue

public SequenceQueue(JdbcAdaptor jdbcAdaptor,
             DataSource datasource,
             ExecutorService idExecuter,
             String sequenceName,
             int allocationSize)

Parameters:

jdbcAdaptor - the JDBC adaptor

datasource - the datasource to use

idExecuter - the executor service to submit refill tasks

sequenceName - the physical name of the sequence

allocationSize - the allocations size

Since:

2.0.0

Method Detail

getNextId

protected Long getNextId()
                  throws SQLException

Returns the next value from the database.

Specified by:

getNextId in class IdQueue

Returns:

the next id

Throws:

SQLException