Class FilePersistenceManager

java.lang.Object

org.jgroups.persistence.FilePersistenceManager

All Implemented Interfaces:

PersistenceManager

public class FilePersistenceManager
extends Object
implements PersistenceManager

Constructor Summary

Constructors

Constructor	Description
FilePersistenceManager(String propertiesFilename)	Default constructor

Method Summary

Modifier and Type	Method	Description
void	clear()	Clears the complete NV state from the DB
protected Map	filterLoadedValues(Map in)	Turns the values into Floats to enable DistributedHashtableDemo to work.
Serializable	remove(Serializable key)	Remove existing NV from being persisted
Map	retrieveAll()	Gives back the Map in last known state
void	save(Serializable key, Serializable val)	Save new NV pair as serializable objects or if already exist; store new state
void	saveAll(Map map)	Use to store a complete map into persistent state
void	shutDown()	Used to handle shutdown call the PersistenceManager implementation.

Methods inherited from class Object

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

Constructor Details

FilePersistenceManager

public FilePersistenceManager(String propertiesFilename)
                       throws Exception

Default constructor

Throws:

Exception

Method Details

save

public void save(Serializable key,
 Serializable val)
          throws CannotPersistException

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

Specified by:

save in interface PersistenceManager

Parameters:

key -

val -

Throws:

CannotPersistException

remove

public Serializable remove(Serializable key)
                    throws CannotRemoveException

Remove existing NV from being persisted

Specified by:

remove in interface PersistenceManager

Parameters:

key - value

Returns:

Serializable; gives back the value

Throws:

CannotRemoveException

saveAll

public void saveAll(Map map)
             throws CannotPersistException

Use to store a complete map into persistent state

Specified by:

saveAll in interface PersistenceManager

Parameters:

map -

Throws:

CannotPersistException

retrieveAll

public Map retrieveAll()
                throws CannotRetrieveException

Gives back the Map in last known state

Specified by:

retrieveAll in interface PersistenceManager

Returns:

Map;

Throws:

CannotRetrieveException

filterLoadedValues

protected Map filterLoadedValues(Map in)

Turns the values into Floats to enable DistributedHashtableDemo to work. Subclasses should override this method to convert the incoming map of string/string key/value pairs into the types they want.

Parameters:

in -

Returns:

Map

clear

public void clear()
           throws CannotRemoveException

Clears the complete NV state from the DB

Specified by:

clear in interface PersistenceManager

Throws:

CannotRemoveException

shutDown

public void shutDown()

Used to handle shutdown call the PersistenceManager implementation. Persistent engines can leave this implementation empty.

Specified by:

shutDown in interface PersistenceManager