org.helidb.backend.heapcrs
Class ConstantRecordSizeHeapBackendFactory<K,V>

java.lang.Object
  org.helidb.backend.heapcrs.ConstantRecordSizeHeapBackendFactory<K,V>

Type Parameters:

K - The type of the keys in the database.

V - The type of the values in the database.

All Implemented Interfaces:

DatabaseBackendFactory<K,V,Long>

public class ConstantRecordSizeHeapBackendFactory<K,V>
extends Object
implements DatabaseBackendFactory<K,V,Long>

This is a DatabaseBackendFactory for creating ConstantRecordSizeHeapBackend objects.

Since:

1.0

Author:

Karl Gustafsson

See Also:

ConstantRecordSizeHeapBackend

In_jar:

helidb-core

Constructor Summary

ConstantRecordSizeHeapBackendFactory(Serializer<K> keySerializer, Serializer<V> valueSerializer, long startPosOfDb, int tmpBufferSize, LogAdapterHolder lah)
Create a new backend factory for ConstantRecordSizeHeapBackend objects.

Method Summary

ConstantRecordSizeHeapBackend<K,V>

create(DatabaseFiles f, boolean readOnly) Create a new backend for the supplied file.

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstantRecordSizeHeapBackendFactory

public ConstantRecordSizeHeapBackendFactory(Serializer<K> keySerializer,
                                            Serializer<V> valueSerializer,
                                            long startPosOfDb,
                                            int tmpBufferSize,
                                            LogAdapterHolder lah)
                                     throws IllegalArgumentException,
                                            NullPointerException

Create a new backend factory for ConstantRecordSizeHeapBackend objects.

Parameters:

keySerializer - The serializer used for serializing keys. This instance is reused for all created backends.

valueSerializer - The serializer used for serializing values. This instance is reused for all created backends.

startPosOfDb - The start position of the database in the database files.

tmpBufferSize - The size of temporary in-memory buffers used by the database.

lah - A log adapter holder.

Throws:

IllegalArgumentException - If startPosOfDb or valueSize is negative or if keySize is less than one byte.

NullPointerException

Method Detail

create

public ConstantRecordSizeHeapBackend<K,V> create(DatabaseFiles f,
                                                 boolean readOnly)

Description copied from interface: DatabaseBackendFactory

Create a new backend for the supplied file.

Specified by:

create in interface DatabaseBackendFactory<K,V,Long>

Parameters:

f - The file(s) containing the database data. The implementation of this method should be able to assume a specific DatabaseFiles implementation. Which depends on the implementation of the database backend to create.

readOnly - Should the backend object be created read only?

Returns:

A new database backend object.