water.persist
Class PersistNFS

java.lang.Object
  water.persist.Persist
      water.persist.PersistNFS

public final class PersistNFS
extends Persist

Field Summary

static int

KEY_PREFIX_LENGTH

Fields inherited from class water.persist.Persist

I, UNKNOWN

Constructor Summary

PersistNFS()

Method Summary

void	clear()
static Key	decodeFile(java.io.File f)
void	delete(Value v)
java.lang.String	getPath()
Value	lazyArrayChunk(Key key) Lazily manifest data chunks on demand.
byte[]	load(Value v) Value should already be persisted to disk.
void	loadExisting() Load all Key/Value pairs that can be found on the backend.
static java.io.InputStream	openStream(Key k)
void	store(Value v)

Methods inherited from class water.persist.Persist

getIce, getTotalSpace, getUsableSpace, initialize

Methods inherited from class java.lang.Object

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

Field Detail

KEY_PREFIX_LENGTH

public static final int KEY_PREFIX_LENGTH

Constructor Detail

PersistNFS

public PersistNFS()

Method Detail

decodeFile

public static Key decodeFile(java.io.File f)

openStream

public static java.io.InputStream openStream(Key k)
                                      throws java.io.IOException

Throws:

java.io.IOException

load

public byte[] load(Value v)

Description copied from class: Persist

Value should already be persisted to disk. A racing delete can trigger a failure where we get a null return, but no crash (although one could argue that a racing load&delete is a bug no matter what).

Specified by:

load in class Persist

store

public void store(Value v)

Specified by:

store in class Persist

lazyArrayChunk

public Value lazyArrayChunk(Key key)

Description copied from class: Persist

Lazily manifest data chunks on demand.

Specified by:

lazyArrayChunk in class Persist

getPath

public java.lang.String getPath()

Specified by:

getPath in class Persist

clear

public void clear()

Specified by:

clear in class Persist

loadExisting

public void loadExisting()

Description copied from class: Persist

Load all Key/Value pairs that can be found on the backend.

Specified by:

loadExisting in class Persist

delete

public void delete(Value v)

Specified by:

delete in class Persist