com.edorasware.commons.core.persistence

Class SequentialPrimaryKeyGenerator

java.lang.Object

com.edorasware.commons.core.persistence.SequentialPrimaryKeyGenerator

All Implemented Interfaces:

PrimaryKeyGenerator

public final class SequentialPrimaryKeyGenerator
extends Object
implements PrimaryKeyGenerator

Returns unique primary keys in sequential order. Delegates to a SequentialPrimaryKeyPersistence implementation for cluster-safe generation and persistence of primary keys. This implementation is thread-safe.

Constructor Summary

Constructors

Constructor and Description
SequentialPrimaryKeyGenerator(SequentialPrimaryKeyPersistence primaryKeyPersistence, int blockSize) Create a new instance that delegates actual primary key generation to the given primary key persistence.

Method Summary

Modifier and Type	Method and Description
int	getBlockSize() Returns the configured block size.
<T> T	getNextPrimaryKey(Class<T> expectedType) Generates the next primary key.

Methods inherited from class java.lang.Object

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

Constructor Detail

SequentialPrimaryKeyGenerator

public SequentialPrimaryKeyGenerator(SequentialPrimaryKeyPersistence primaryKeyPersistence,
                                     int blockSize)

Create a new instance that delegates actual primary key generation to the given primary key persistence. Each block of primary keys returned by the primary key persistence delegate will be of the given block size.

Parameters:

primaryKeyPersistence - the primary key persistence that generates the actual primary keys

blockSize - the number of primary keys to fetch from the primary key persistence

Method Detail

getBlockSize

public int getBlockSize()

Returns the configured block size.

Returns:

the block size

getNextPrimaryKey

public <T> T getNextPrimaryKey(Class<T> expectedType)

Generates the next primary key.

Specified by:

getNextPrimaryKey in interface PrimaryKeyGenerator

Type Parameters:

T - the type of the class

Parameters:

expectedType - the expected type of the key

Returns:

the generated key