Module io.ebean.api

Package io.ebean.config.dbplatform

Class SequenceBatchIdGenerator

java.lang.Object

io.ebean.config.dbplatform.SequenceIdGenerator

io.ebean.config.dbplatform.SequenceBatchIdGenerator

All Implemented Interfaces:

PlatformIdGenerator

public abstract class SequenceBatchIdGenerator
extends SequenceIdGenerator

Database sequence based IdGenerator using Sequence Step 1 but batch fetch many sequence values.

Field Summary

Fields inherited from class io.ebean.config.dbplatform.SequenceIdGenerator

allocationSize, backgroundExecutor, currentlyBackgroundLoading, dataSource, idList, log, seqName

Fields inherited from interface io.ebean.config.dbplatform.PlatformIdGenerator

AUTO_UUID

Constructor Summary

Constructors

Constructor	Description
SequenceBatchIdGenerator(BackgroundExecutor be, DataSource ds, String seqName, int batchSize)	Construct where batchSize is the sequence step size.

Method Summary

Modifier and Type	Method	Description
void	preAllocateIds(int requestSize)	If allocateSize is large load some sequences in a background thread.
protected List<Long>	readIds(ResultSet resultSet, int loadSize)	Add the next set of Ids as the next value plus all the following numbers up to the step size.

Methods inherited from class io.ebean.config.dbplatform.SequenceIdGenerator

getMoreIds, getName, getSql, isDbSequence, loadInBackground, nextId

Methods inherited from class java.lang.Object

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

Constructor Detail

SequenceBatchIdGenerator

public SequenceBatchIdGenerator(BackgroundExecutor be,
                                DataSource ds,
                                String seqName,
                                int batchSize)

Construct where batchSize is the sequence step size.

Method Detail

preAllocateIds

public void preAllocateIds(int requestSize)

If allocateSize is large load some sequences in a background thread.

For example, when inserting a bean with a cascade on a OneToMany with many beans Ebean can call this to ensure .

Specified by:

preAllocateIds in interface PlatformIdGenerator

Overrides:

preAllocateIds in class SequenceIdGenerator

readIds

protected List<Long> readIds(ResultSet resultSet,
                             int loadSize)
                      throws SQLException

Add the next set of Ids as the next value plus all the following numbers up to the step size.

Specified by:

readIds in class SequenceIdGenerator

Throws:

SQLException