com.atomikos.persistence.imp
Class VolatileStateRecoveryManager

java.lang.Object
  com.atomikos.persistence.imp.VolatileStateRecoveryManager

All Implemented Interfaces:

FSMPreEnterListener, StateRecoveryManager, EventListener

public class VolatileStateRecoveryManager
extends Object
implements StateRecoveryManager, FSMPreEnterListener

A volatile recovery manager (one that doesn't support persistent logging and hence doesn't allow recovery after a crash or restart).

Constructor Summary

VolatileStateRecoveryManager()
Construct a new instance.

Method Summary

void	close() Shutdown.
void	delete(Object id) Deletes a given image from the underlying logs.
void	init() Initialize the recovery mgr before calling the other methods.
void	preEnter(FSMEnterEvent event) Called BEFORE the FSM enters the new state, so that the callee is sure that nobody has seen the new state yet.
Vector	recover() Recover all recorded recoverable instances in their latest state.
StateRecoverable	recover(Object id) Reconstruct an instance of a staterecoverable.
void	register(StateRecoverable staterecoverable) Register a staterecoverable with the recovery manager service.

Methods inherited from class java.lang.Object

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

Constructor Detail

VolatileStateRecoveryManager

public VolatileStateRecoveryManager()

Construct a new instance.

Method Detail

init

public void init()
          throws LogException

Description copied from interface: StateRecoveryManager

Initialize the recovery mgr before calling the other methods.

Specified by:

init in interface StateRecoveryManager

Throws:

LogException - If the underlying log fails.

See Also:

StateRecoveryManager

register

public void register(StateRecoverable staterecoverable)

Description copied from interface: StateRecoveryManager

Register a staterecoverable with the recovery manager service.

Specified by:

register in interface StateRecoveryManager

Parameters:

staterecoverable - The object that wants recoverable states.

See Also:

StateRecoveryManager

preEnter

public void preEnter(FSMEnterEvent event)
              throws IllegalStateException

Description copied from interface: FSMPreEnterListener

Called BEFORE the FSM enters the new state, so that the callee is sure that nobody has seen the new state yet.

Specified by:

preEnter in interface FSMPreEnterListener

Throws:

IllegalStateException - on failure. The callee can use this to prevent the state change from happening.

See Also:

FSMPreEnterListener

close

public void close()
           throws LogException

Description copied from interface: StateRecoveryManager

Shutdown.

Specified by:

close in interface StateRecoveryManager

Throws:

LogException - For underlying log failure.

See Also:

StateRecoveryManager

recover

public StateRecoverable recover(Object id)
                         throws LogException

Description copied from interface: StateRecoveryManager

Reconstruct an instance of a staterecoverable.

Specified by:

recover in interface StateRecoveryManager

Returns:

StateRecoverable The instance, or null if not found.

Throws:

LogException - If underlying object log fails.

See Also:

StateRecoveryManager

recover

public Vector recover()
               throws LogException

Description copied from interface: StateRecoveryManager

Recover all recorded recoverable instances in their latest state.

Specified by:

recover in interface StateRecoveryManager

Returns:

Vector A vector of reconstructed StateRecoverables.

Throws:

LogException - If the log fails.

See Also:

StateRecoveryManager

delete

public void delete(Object id)
            throws LogException

Description copied from interface: StateRecoveryManager

Deletes a given image from the underlying logs.

Specified by:

delete in interface StateRecoveryManager

Parameters:

id - The id of the image to delete.

Throws:

LogException - On failure.

See Also:

StateRecoveryManager