simpleorm.sessionjdbc

Class SGenerator

java.lang.Object

simpleorm.sessionjdbc.SGenerator

Direct Known Subclasses:

ClusterAwareSequenceGenerator, SGeneratorInsertIdentity

public abstract class SGenerator
extends java.lang.Object

Generate keys using rows in a separate sequence table. This should be done in a separate transaction to avoid locking problems.

One instance per SFieldMeta, ie. not per session or per driver.

Method Summary

Modifier and Type	Method and Description
java.lang.String	createDDL(SSessionJdbc session) returns DDL required to support number generation, Eg.
java.lang.String	dropDDL(SSessionJdbc session)
abstract long	generateKey(SSessionJdbc session, SRecordMeta<?> meta, SFieldScalar keyField)
java.lang.String	getName()
static SGenerator	theGenerator(SFieldScalar fld)

Methods inherited from class java.lang.Object

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

Method Detail

theGenerator

public static SGenerator theGenerator(SFieldScalar fld)

getName

public java.lang.String getName()

generateKey

public abstract long generateKey(SSessionJdbc session,
                                 SRecordMeta<?> meta,
                                 SFieldScalar keyField)

createDDL

public java.lang.String createDDL(SSessionJdbc session)

returns DDL required to support number generation, Eg. "CREATE SEQUENCE FOO..." Returns a string rather than just doing it so that the caller can create a DDL file if they want to.

dropDDL

public java.lang.String dropDDL(SSessionJdbc session)