com.kedwards.swt.persist
Class FSPersistifier

java.lang.Object
  |
  +--com.kedwards.swt.persist.FSPersistifier

All Implemented Interfaces:

Persistifier

Direct Known Subclasses:

ActivationPersistifier

public class FSPersistifier

extends java.lang.Object

implements Persistifier

FSPersistifier.java

This is the default persistifier used by the SWT for non-activatable services. It simply writes checkpoint data to a file.

See http://www.kedwards.com/jini

No warranty expressed or implied; use at your own risk; for educational purposes only.

Author:

Keith Edwards

Constructor Summary

FSPersistifier(java.lang.String loc)

Method Summary

void	checkpoint(TaggedPersistentData data) Write the persistent data to stable storage.
void	delete() Irrevocably remote persistent storage.
java.lang.String	getStorageLocation() Get the "location" of storage.
boolean	restorable() Is the persistifier able to restore any prior state? This method may return false if, for instance, the service has never before been checkpointed.
TaggedPersistentData	restore() Read persistent data from stable storage and return it.
void	setStorageLocation(java.lang.String newLoc) Change the "location" of storage.

Methods inherited from class java.lang.Object

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

Constructor Detail

FSPersistifier

public FSPersistifier(java.lang.String loc)
               throws java.io.IOException

Method Detail

restorable

public boolean restorable()

Description copied from interface: Persistifier

Is the persistifier able to restore any prior state? This method may return false if, for instance, the service has never before been checkpointed.

Specified by:

restorable in interface Persistifier

checkpoint

public void checkpoint(TaggedPersistentData data)
                throws java.io.IOException

Description copied from interface: Persistifier

Write the persistent data to stable storage.

Specified by:

checkpoint in interface Persistifier

restore

public TaggedPersistentData restore()
                             throws java.io.IOException

Description copied from interface: Persistifier

Read persistent data from stable storage and return it. Particular implementations of this interface may restore implementation-specific data here and do special things with it.

Specified by:

restore in interface Persistifier

getStorageLocation

public java.lang.String getStorageLocation()

Description copied from interface: Persistifier

Get the "location" of storage.

Specified by:

getStorageLocation in interface Persistifier

setStorageLocation

public void setStorageLocation(java.lang.String newLoc)
                        throws java.io.IOException

Description copied from interface: Persistifier

Change the "location" of storage.

Specified by:

setStorageLocation in interface Persistifier

delete

public void delete()
            throws java.io.IOException

Description copied from interface: Persistifier

Irrevocably remote persistent storage.

Specified by:

delete in interface Persistifier