org.archive.wayback.util.bdb

Class BDBMap

java.lang.Object

org.archive.wayback.util.bdb.BDBMap

public class BDBMap
extends Object

Generic class for simple key-value pair lookup using BDBJE.

Version:

$Date$, $Revision$

Author:

oskar.grenholm@kb.se

Field Summary

Fields

Modifier and Type	Field and Description
protected com.sleepycat.je.Database	db
protected String	dir
protected com.sleepycat.je.Environment	env
protected String	name

Constructor Summary

Constructors

Constructor and Description
BDBMap(String name, String dir) consturctor

Method Summary

Methods

Modifier and Type	Method and Description
static void	addTimestampForId(String context, String ip, String time) associate timestamp time with idenfier ip persistantly
String	get(String keyStr) retrieve the value assoicated with keyStr from persistant storage
static BDBMap	getContextMap(String context)
static String	getTimestampForId(String context, String ip) return the timestamp associated with the identifier argument, or now if no value is associated or something goes wrong.
protected void	init()
void	put(String keyStr, String valueStr) persistantly store key-value pair

Methods inherited from class java.lang.Object

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

Field Detail

env

protected com.sleepycat.je.Environment env

db

protected com.sleepycat.je.Database db

name

protected String name

dir

protected String dir

Constructor Detail

BDBMap

public BDBMap(String name,
      String dir)

consturctor

Parameters:

name - of database

dir - path of directory where dbd files should be stored. The directory is created if it does not exist.

Method Detail

init

protected void init()

put

public void put(String keyStr,
       String valueStr)

persistantly store key-value pair

Parameters:

keyStr -

valueStr -

get

public String get(String keyStr)

retrieve the value assoicated with keyStr from persistant storage

Parameters:

keyStr -

Returns:

String value associated with key, or null if no key is found or an error occurs

getContextMap

public static BDBMap getContextMap(String context)

Parameters:

context -

Returns:

singleton BDBMap for the context

getTimestampForId

public static String getTimestampForId(String context,
                       String ip)

return the timestamp associated with the identifier argument, or now if no value is associated or something goes wrong.

Parameters:

context -

ip -

Returns:

timestamp string value

addTimestampForId

public static void addTimestampForId(String context,
                     String ip,
                     String time)

associate timestamp time with idenfier ip persistantly

Parameters:

context -

ip -

time -