com.bigdata.rawstore

Class AbstractRawStore

java.lang.Object

com.bigdata.rawstore.AbstractRawStore

All Implemented Interfaces:

ICounterSetAccess, IAddressManager, IRawStore, IStreamStore

Direct Known Subclasses:

AbstractRawWormStore, IndexSegmentStore, MemStore, RWStrategy

public abstract class AbstractRawStore
extends Object
implements IRawStore

Abstract base class for IRawStore implementations. This class uses a delegation pattern for the IStoreSerializer interface and does not implement either the methods defined directly by the IRawStore interface nor the methods of the IAddressManager interface. As such it may be used as an abstract base class by any IRawStore implementation.

Version:

$Id$

Author:

Bryan Thompson

Field Summary

Fields inherited from interface com.bigdata.rawstore.IAddressManager

NULL

Constructor Summary

Constructors

Constructor and Description
AbstractRawStore() The designated constructor.

Method Summary

Methods

Modifier and Type	Method and Description
void	delete(long addr) The default implementation is a NOP.
abstract IAddressManager	getAddressManager() Return the delegate object that provides the IAddressManager implementation for this IRawStore.
InputStream	getInputStream(long addr) Return an input stream from which a previously written stream may be read back.
IPSOutputStream	getOutputStream() Return an output stream which can be used to write on the backing store.

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.bigdata.rawstore.IRawStore

close, deleteResources, destroy, force, getFile, getResourceMetadata, getUUID, isFullyBuffered, isOpen, isReadOnly, isStable, read, size, write

Methods inherited from interface com.bigdata.rawstore.IAddressManager

getByteCount, getOffset, getPhysicalAddress, toAddr, toString

Methods inherited from interface com.bigdata.counters.ICounterSetAccess

getCounters

Constructor Detail

AbstractRawStore

public AbstractRawStore()

The designated constructor.

Method Detail

getAddressManager

public abstract IAddressManager getAddressManager()

Return the delegate object that provides the IAddressManager implementation for this IRawStore.

Note: LRUNexus depends on the delegation model to retain references to the IAddressManager without causing the IRawStore to be retained. It uses the IAddressManager to decode the address in order to track the bytesOnDisk for the buffered records.

delete

public void delete(long addr)

The default implementation is a NOP.

Specified by:

delete in interface IRawStore

Parameters:

addr - A long integer formed using Addr that encodes both the offset at which the data was written and the #of bytes that were written.

getOutputStream

public IPSOutputStream getOutputStream()

Description copied from interface: IStreamStore

Return an output stream which can be used to write on the backing store. You can recover the address used to read back the data from the IPSOutputStream.

Specified by:

getOutputStream in interface IStreamStore

Returns:

The output stream.

getInputStream

public InputStream getInputStream(long addr)

Description copied from interface: IStreamStore

Return an input stream from which a previously written stream may be read back.

Specified by:

getInputStream in interface IStreamStore

Parameters:

addr - The address at which the stream was written.

Returns:

an input stream for the data for provided address