org.datanucleus.store.mongodb.valuegenerator

Class IncrementGenerator

java.lang.Object

org.datanucleus.store.valuegenerator.AbstractGenerator<T>

org.datanucleus.store.valuegenerator.AbstractDatastoreGenerator<Long>

org.datanucleus.store.mongodb.valuegenerator.IncrementGenerator

All Implemented Interfaces:

org.datanucleus.store.valuegenerator.ValueGenerator<Long>

public class IncrementGenerator
extends org.datanucleus.store.valuegenerator.AbstractDatastoreGenerator<Long>

Generator that uses a collection in MongoDB to store and allocate identity values.

Nested Class Summary

Nested classes/interfaces inherited from class org.datanucleus.store.valuegenerator.AbstractDatastoreGenerator

org.datanucleus.store.valuegenerator.AbstractDatastoreGenerator.ConnectionPreference

Field Summary

Fields inherited from class org.datanucleus.store.valuegenerator.AbstractDatastoreGenerator

connectionProvider, storeMgr

Fields inherited from class org.datanucleus.store.valuegenerator.AbstractGenerator

allocationSize, block, initialValue, name, properties, repositoryExists

Constructor Summary

Constructors

Constructor and Description
IncrementGenerator(String name, Properties props) Constructor.

Method Summary

Modifier and Type	Method and Description
protected org.datanucleus.store.valuegenerator.ValueGenerationBlock<Long>	reserveBlock(long size)

Methods inherited from class org.datanucleus.store.valuegenerator.AbstractDatastoreGenerator

getConnectionPreference, setConnectionProvider, setStoreManager

Methods inherited from class org.datanucleus.store.valuegenerator.AbstractGenerator

allocate, createRepository, current, currentValue, getName, next, nextValue, obtainGenerationBlock, obtainGenerationBlock, repositoryExists, requiresRepository, reserveBlock

Methods inherited from class java.lang.Object

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

Constructor Detail

IncrementGenerator

public IncrementGenerator(String name,
                          Properties props)

Constructor. Will receive the following properties (as a minimum) through this constructor.

• class-name : Name of the class whose object is being inserted.
• root-class-name : Name of the root class in this inheritance tree
• field-name : Name of the field with the strategy (unless datastore identity field)
• catalog-name : Catalog of the table (if specified)
• schema-name : Schema of the table (if specified)
• table-name : Name of the root table for this inheritance tree (containing the field).
• column-name : Name of the column in the table (for the field)
• sequence-name : Name of the sequence (if specified in MetaData as "sequence)

Parameters:

name - Symbolic name for this generator

props - Properties controlling the behaviour of the generator (or null if not required).

Method Detail

reserveBlock

protected org.datanucleus.store.valuegenerator.ValueGenerationBlock<Long> reserveBlock(long size)

Specified by:

reserveBlock in class org.datanucleus.store.valuegenerator.AbstractGenerator<Long>