com.atomikos.persistence.dataserializable
Class FileLogStream

java.lang.Object
  com.atomikos.persistence.imp.AbstractLogStream
      com.atomikos.persistence.dataserializable.FileLogStream

All Implemented Interfaces:

LogStream

public class FileLogStream
extends AbstractLogStream
implements LogStream

A file implementation of a LogStream.

Field Summary

Fields inherited from class com.atomikos.persistence.imp.AbstractLogStream

corrupt_, file_, LOGGER, output_, simulateCrash_

Constructor Summary

FileLogStream(String baseDir, String baseName)

Method Summary

void	flushObject(Object o, boolean shouldSync) Flush (force) an object to the stream.
Vector<Recoverable>	recover() Reads the log contents, and initializes the data structure.
void	writeCheckpoint(Enumeration elements) After intial recovery, it is good practice to write a checkpoint with only the most recent data.

Methods inherited from class com.atomikos.persistence.imp.AbstractLogStream

close, closeOutput, finalize, getSize, setCrashMode

Methods inherited from class java.lang.Object

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

Methods inherited from interface com.atomikos.persistence.LogStream

close, getSize

Constructor Detail

FileLogStream

public FileLogStream(String baseDir,
                     String baseName)
              throws IOException

Throws:

IOException

Method Detail

recover

public Vector<Recoverable> recover()
                            throws LogException

Description copied from interface: LogStream

Reads the log contents, and initializes the data structure. Should be called first.

Specified by:

recover in interface LogStream

Returns:

Vector The read objects from the log.

Throws:

LogException - On failure.

writeCheckpoint

public void writeCheckpoint(Enumeration elements)
                     throws LogException

Description copied from interface: LogStream

After intial recovery, it is good practice to write a checkpoint with only the most recent data. This method does that, and can also be called at random intervals during normal operation.

Specified by:

writeCheckpoint in interface LogStream

Parameters:

elements - The elements to keep in the log.

Throws:

LogException - On failure.

flushObject

public void flushObject(Object o,
                        boolean shouldSync)
                 throws LogException

Description copied from interface: LogStream

Flush (force) an object to the stream. If this method returns then the object is guaranteed to be persisted.

Specified by:

flushObject in interface LogStream

Throws:

LogException - On failure.