org.javagroups.persistence
Class DBPersistenceManager

java.lang.Object
  |
  +--org.javagroups.persistence.DBPersistenceManager

All Implemented Interfaces:

PersistenceManager

public class DBPersistenceManager

extends java.lang.Object

implements PersistenceManager

Class will be utilized

Constructor Summary

DBPersistenceManager(java.io.InputStream input)
Duplicate constructor allowing inputstream

DBPersistenceManager(java.lang.String filename)
Default construct

Method Summary

void	clear() Clears the key-cache as well as all entries
protected void	init(java.io.InputStream in) used to intitiailize complete DB access.
java.io.Serializable	remove(java.io.Serializable key) Used to remove existing entry
java.util.Map	retrieveAll() Used to retrieve the persisted map back to its last known state
void	save(java.io.Serializable key, java.io.Serializable val) Save new NV pair as serializable objects or if already exist; store new state
void	saveAll(java.util.Map map) Used to save all row entries for the map in to DB
void	shutDown() Shutting down the database cleanly

Methods inherited from class java.lang.Object

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

Constructor Detail

DBPersistenceManager

public DBPersistenceManager(java.lang.String filename)
                     throws java.lang.Exception

Default construct

Parameters:

filename - absolute filepath

Throws:

Exception;

java.lang.Exception

DBPersistenceManager

public DBPersistenceManager(java.io.InputStream input)
                     throws java.lang.Exception

Duplicate constructor allowing inputstream

Parameters:

input -

Throws:

java.lang.Exception

Method Detail

init

protected void init(java.io.InputStream in)
             throws java.lang.Exception

used to intitiailize complete DB access. THis method will use existing database to create schema (if it doesnt exist) and get PersistenceManager in usable condition

Throws:

Exception;

java.lang.Exception

save

public void save(java.io.Serializable key,
                 java.io.Serializable val)
          throws CannotPersistException

Save new NV pair as serializable objects or if already exist; store new state

Specified by:

save in interface PersistenceManager

Throws:

CannotPersistException;

CannotPersistException

remove

public java.io.Serializable remove(java.io.Serializable key)
                            throws CannotRemoveException

Used to remove existing entry

Specified by:

remove in interface PersistenceManager

Returns:

Serializable; value

Throws:

CannotRemoveException;

CannotRemoveException

saveAll

public void saveAll(java.util.Map map)
             throws CannotPersistException

Used to save all row entries for the map in to DB

Specified by:

saveAll in interface PersistenceManager

Throws:

CannotPersistException;

CannotPersistException

retrieveAll

public java.util.Map retrieveAll()
                          throws CannotRetrieveException

Used to retrieve the persisted map back to its last known state

Specified by:

retrieveAll in interface PersistenceManager

Returns:

Map;

Throws:

CannotRetrieveException;

CannotRetrieveException

clear

public void clear()
           throws CannotRemoveException

Clears the key-cache as well as all entries

Specified by:

clear in interface PersistenceManager

Throws:

CannotRemoveException;

CannotRemoveException

shutDown

public void shutDown()

Shutting down the database cleanly

Specified by:

shutDown in interface PersistenceManager