com.atomikos.persistence.imp
Class StreamObjectLog

java.lang.Object
  com.atomikos.persistence.imp.AbstractObjectLog
      com.atomikos.persistence.imp.StreamObjectLog

All Implemented Interfaces:

ObjectLog

public class StreamObjectLog
extends AbstractObjectLog
implements ObjectLog

Constructor Summary

StreamObjectLog(LogStream logstream, long maxFlushesBetweenCheckpoints)

Method Summary

void	close() Closes the log after use.
void	delete(Object id) Deletes the given object from the log.
void	flush(Recoverable rec) Flushes to permanent memory.
void	flush(SystemLogImage img, boolean shouldSync)
void	init() Initializes the object log.
Vector	recover() Recovers all non-deleted object images flushed so far.
Recoverable	recover(Object id) Recovers the instance with given ID.

Methods inherited from class java.lang.Object

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

Constructor Detail

StreamObjectLog

public StreamObjectLog(LogStream logstream,
                       long maxFlushesBetweenCheckpoints)

Method Detail

init

public void init()
          throws LogException

Description copied from interface: ObjectLog

Initializes the object log. To be called as the first method.

Specified by:

init in interface ObjectLog

Throws:

LogException - If error occurs.

See Also:

ObjectLog

recover

public Vector recover()
               throws LogException

Description copied from interface: ObjectLog

Recovers all non-deleted object images flushed so far.

Specified by:

recover in interface ObjectLog

Returns:

Vector A list of Recoverable instances, reconstructed from their images.

Throws:

LogException

See Also:

ObjectLog

flush

public void flush(Recoverable rec)
           throws LogException

Description copied from interface: ObjectLog

Flushes to permanent memory.

Specified by:

flush in interface ObjectLog

Parameters:

rec - Recoverable instance. NOTE: if the instance has the same ObjectId as a previous one, then the latter will be overridden by this one! More precisely, history() will only return the last image for a given ObjectId.

Throws:

LogException - if it did not work.

See Also:

ObjectLog

flush

public void flush(SystemLogImage img,
                  boolean shouldSync)
           throws LogException

Specified by:

flush in class AbstractObjectLog

Throws:

LogException

recover

public Recoverable recover(Object id)
                    throws LogException

Description copied from interface: ObjectLog

Recovers the instance with given ID.

Specified by:

recover in interface ObjectLog

Parameters:

id - The id to recover. @return Recoverable The recovered logimage, null if not found. @exception LogException On failure.

Throws:

LogException

See Also:

ObjectLog

delete

public void delete(Object id)
            throws LogException

Description copied from interface: ObjectLog

Deletes the given object from the log.

Specified by:

delete in interface ObjectLog

Parameters:

id - The object UID.

Throws:

LogException - on failure.

See Also:

ObjectLog

close

public void close()
           throws LogException

Description copied from interface: ObjectLog

Closes the log after use.

Specified by:

close in interface ObjectLog

Throws:

LogException - on failure.

See Also:

ObjectLog