org.datanucleus.store.rdbms
Class NucleusSequenceImpl

java.lang.Object
  org.datanucleus.store.NucleusSequenceImpl
      org.datanucleus.store.rdbms.NucleusSequenceImpl

All Implemented Interfaces:

org.datanucleus.store.NucleusSequence

public class NucleusSequenceImpl
extends org.datanucleus.store.NucleusSequenceImpl

Basic implementation of a DataNucleus datastore sequence for RDBMS. Utilises the org.datanucleus.store.valuegenerator classes to generate sequence values.

Field Summary

Fields inherited from class org.datanucleus.store.NucleusSequenceImpl

ec, generator, LOCALISER, seqMetaData, storeManager

Constructor Summary

NucleusSequenceImpl(org.datanucleus.store.ExecutionContext objectMgr, org.datanucleus.store.mapped.MappedStoreManager storeMgr, org.datanucleus.metadata.SequenceMetaData seqmd)
Constructor.

Method Summary

void	setGenerator() Method to set the value generator.

Methods inherited from class org.datanucleus.store.NucleusSequenceImpl

allocate, current, currentValue, getName, next, nextValue

Methods inherited from class java.lang.Object

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

Constructor Detail

NucleusSequenceImpl

public NucleusSequenceImpl(org.datanucleus.store.ExecutionContext objectMgr,
                           org.datanucleus.store.mapped.MappedStoreManager storeMgr,
                           org.datanucleus.metadata.SequenceMetaData seqmd)

Constructor.

Parameters:

objectMgr - The Object Manager managing the sequence

storeMgr - Manager of the store where we obtain the sequence

seqmd - MetaData defining the sequence

Method Detail

setGenerator

public void setGenerator()

Method to set the value generator. Uses "sequence" if the datastore supports it, otherwise "increment".

Overrides:

setGenerator in class org.datanucleus.store.NucleusSequenceImpl