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

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

Type Parameters:

K - The type of keys in the backend.

V - The type of values in the backend.

public class ConstantRecordSizeHeapBackendBuilder<K,V>
extends Object

This is a builder for ConstantRecordSizeHeapBackend objects. A builder object may be reused to create several backends with similar configurations.

Since:

1.0

Author:

Karl Gustafsson

See Also:

ConstantRecordSizeHeapBackend

In_jar:

helidb-core

Constructor Summary

ConstantRecordSizeHeapBackendBuilder()

Method Summary

ConstantRecordSizeHeapBackend<K,V>	create(RandomlyAccessibleFile f) Create a new backend object.
ConstantRecordSizeHeapBackendBuilder<K,V>	setBufferSize(int size) Set the size of temporary in-memory buffers used by the backend.
ConstantRecordSizeHeapBackendBuilder<K,V>	setKeySerializer(Serializer<K> serializer) Set the key serializer.
ConstantRecordSizeHeapBackendBuilder<K,V>	setLogAdapterHolder(LogAdapterHolder lah) Set the log adapter holder.
ConstantRecordSizeHeapBackendBuilder<K,V>	setReadOnly(boolean b) Should the created backend be read only? The default value is false.
ConstantRecordSizeHeapBackendBuilder<K,V>	setStartPosOfDb(long pos) Set the start position of database data in the database file.
ConstantRecordSizeHeapBackendBuilder<K,V>	setValueSerializer(Serializer<V> serializer) Set the value serializer.

Methods inherited from class java.lang.Object

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

Constructor Detail

ConstantRecordSizeHeapBackendBuilder

public ConstantRecordSizeHeapBackendBuilder()

Method Detail

setReadOnly

public ConstantRecordSizeHeapBackendBuilder<K,V> setReadOnly(boolean b)

Should the created backend be read only? The default value is false.

Parameters:

b - Should the created backend be read only?

Returns:

this

setKeySerializer

public ConstantRecordSizeHeapBackendBuilder<K,V> setKeySerializer(Serializer<K> serializer)

Set the key serializer. This property must be set.

Parameters:

serializer - The key serializer.

Returns:

this

setValueSerializer

public ConstantRecordSizeHeapBackendBuilder<K,V> setValueSerializer(Serializer<V> serializer)

Set the value serializer. This property must be set.

Parameters:

serializer - The value serializer.

Returns:

this

setStartPosOfDb

public ConstantRecordSizeHeapBackendBuilder<K,V> setStartPosOfDb(long pos)
                                                          throws IllegalArgumentException

Set the start position of database data in the database file. The default value of this property is 0.

Parameters:

pos - The start position of database data in the database file.

Returns:

this

Throws:

IllegalArgumentException - If pos < 0.

setBufferSize

public ConstantRecordSizeHeapBackendBuilder<K,V> setBufferSize(int size)
                                                        throws IllegalArgumentException

Set the size of temporary in-memory buffers used by the backend. The default value of this property is 8192 bytes.

Parameters:

size - The size of temporary in-memory buffers, in bytes.

Returns:

this

Throws:

IllegalArgumentException - If size < 1

setLogAdapterHolder

public ConstantRecordSizeHeapBackendBuilder<K,V> setLogAdapterHolder(LogAdapterHolder lah)

Set the log adapter holder. The default value of this property is a log adapter holding holding a StdOutLogAdapter.

Parameters:

lah - The log adapter holder.

Returns:

this

create

public ConstantRecordSizeHeapBackend<K,V> create(RandomlyAccessibleFile f)

Create a new backend object.

Parameters:

f - The database file.

Returns:

A new backend object.