water.persist

Class PersistHdfs

java.lang.Object

water.persist.Persist

water.persist.PersistHdfs

public final class PersistHdfs
extends Persist

HDFS persistence layer.

Nested Class Summary

Nested classes/interfaces inherited from class water.persist.Persist

Persist.Schemes

Field Summary

Fields

Modifier and Type	Field and Description
static org.apache.hadoop.conf.Configuration	CONF Globally shared HDFS configuration.

Fields inherited from class water.persist.Persist

I

Method Summary

Methods

Modifier and Type	Method and Description
static void	addFolder(org.apache.hadoop.fs.Path p, java.util.ArrayList<java.lang.String> keys, java.util.ArrayList<java.lang.String> failed)
void	delete(Value v) Reclaim space from a previously stored Value
byte[]	load(Value v) InputStream from a HDFS-based Key
static void	store(org.apache.hadoop.fs.Path path, byte[] data)
void	store(Value v) Store a Value into persistent storage, consuming some storage space.
Key	uriToKey(java.net.URI uri) Transform given uri into file vector holding file name.

Methods inherited from class water.persist.Persist

anyURIToKey, getIce, getTotalSpace, getUsableSpace

Methods inherited from class java.lang.Object

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

Field Detail

CONF

public static final org.apache.hadoop.conf.Configuration CONF

Globally shared HDFS configuration.

Method Detail

load

public byte[] load(Value v)

InputStream from a HDFS-based Key

Specified by:

load in class Persist

store

public void store(Value v)

Description copied from class: Persist

Store a Value into persistent storage, consuming some storage space.

Specified by:

store in class Persist

store

public static void store(org.apache.hadoop.fs.Path path,
         byte[] data)

delete

public void delete(Value v)

Description copied from class: Persist

Reclaim space from a previously stored Value

Specified by:

delete in class Persist

addFolder

public static void addFolder(org.apache.hadoop.fs.Path p,
             java.util.ArrayList<java.lang.String> keys,
             java.util.ArrayList<java.lang.String> failed)
                      throws java.io.IOException

Throws:

java.io.IOException

uriToKey

public Key uriToKey(java.net.URI uri)
             throws java.io.IOException

Description copied from class: Persist

Transform given uri into file vector holding file name.

Specified by:

uriToKey in class Persist

Throws:

java.io.IOException