kodo.jdbc.schema
Class SimpleSequenceFactory

java.lang.Object
  |
  +--kodo.jdbc.schema.SimpleSequenceFactory

All Implemented Interfaces:

SequenceFactory

public class SimpleSequenceFactory

extends Object

implements SequenceFactory

Very simple sequence factory that uses a static counter initialized to the current time to create unique id values.

Constructor Summary

SimpleSequenceFactory()

Method Summary

void	addSchema(ClassMapping mapping, SchemaGroup group) Add any tables, etc needed by this factory for the given mapping to the given schema group, if they do not exist already.
boolean	ensureCapacity(int count, ClassMapping cm, DataSource ds) Ensures that this sequence factory has sufficient capacity readily available to provide count new sequence values.
long	getNext(ClassMapping mapping, DataSource ds) Return a unique primary key value.

Methods inherited from class java.lang.Object

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

Constructor Detail

SimpleSequenceFactory

public SimpleSequenceFactory()

Method Detail

addSchema

public void addSchema(ClassMapping mapping,
                      SchemaGroup group)

Description copied from interface: SequenceFactory

Add any tables, etc needed by this factory for the given mapping to the given schema group, if they do not exist already.

Specified by:

addSchema in interface SequenceFactory

getNext

public long getNext(ClassMapping mapping,
                    DataSource ds)
             throws Exception

Description copied from interface: SequenceFactory

Return a unique primary key value.

Specified by:

getNext in interface SequenceFactory

Following copied from interface: kodo.jdbc.schema.SequenceFactory

Parameters:

mapping - metadata on the class of the object being persisted

ds - the data source from which to obtain database connections, if any are needed

ensureCapacity

public boolean ensureCapacity(int count,
                              ClassMapping cm,
                              DataSource ds)

Description copied from interface: SequenceFactory

Ensures that this sequence factory has sufficient capacity readily available to provide count new sequence values.

Specified by:

ensureCapacity in interface SequenceFactory

Following copied from interface: kodo.jdbc.schema.SequenceFactory

Parameters:

count - number of sequence values to attempt to serve

cm - metadata on the class of the object being persisted

ds - the data source from which to obtain database connections, if any are needed

Returns:

true if the factory can service count requests without returning to the datastore; else false