Package io.ebean.config.dbplatform

Class SequenceBatchIdGenerator

java.lang.Object

io.ebean.config.dbplatform.SequenceIdGenerator

io.ebean.config.dbplatform.SequenceBatchIdGenerator

All Implemented Interfaces:

PlatformIdGenerator

Direct Known Subclasses:

DB2SequenceIdGenerator, H2SequenceIdGenerator, OracleSequenceIdGenerator, PostgresSequenceIdGenerator

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 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.

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

getName, getSql, isDbSequence, nextId

Methods inherited from class java.lang.Object

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

Constructor Details

SequenceBatchIdGenerator

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

Construct where batchSize is the sequence step size.

Method Details

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