galileo.fs

Class PathJournal

java.lang.Object

galileo.fs.PathJournal

public class PathJournal
extends java.lang.Object

Constructor Summary

Constructors

Constructor and Description
PathJournal(java.lang.String pathFile)

Method Summary

Modifier and Type	Method and Description
void	erase() Removes the Path Journal and its Feature index files.
void	persistPath(FeaturePath<java.lang.String> path) Adds a graph FeaturePath to the journal.
boolean	recover(java.util.List<FeaturePath<java.lang.String>> paths) Recovers the Path Journal from disk.
void	shutdown() Closes open journal files and stops accepting new FeaturePaths.
void	start() Prepares the journal files and allows new entries to be written.

Methods inherited from class java.lang.Object

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

Constructor Detail

PathJournal

public PathJournal(java.lang.String pathFile)

Method Detail

recover

public boolean recover(java.util.List<FeaturePath<java.lang.String>> paths)
                throws java.io.IOException

Recovers the Path Journal from disk.

Parameters:

paths - A list that will be populated with all the recovered paths.

Returns:

true if the recovery was completed cleanly; if false, there were issues with the journal files (possible corruption).

Throws:

java.io.IOException

start

public void start()
           throws java.io.IOException

Prepares the journal files and allows new entries to be written.

Throws:

java.io.IOException

persistPath

public void persistPath(FeaturePath<java.lang.String> path)
                 throws FileSystemException,
                        java.io.IOException

Adds a graph FeaturePath to the journal.

Parameters:

path - The FeaturePath to add to the journal.

Throws:

FileSystemException

java.io.IOException

erase

public void erase()
           throws java.io.IOException

Removes the Path Journal and its Feature index files. This method shuts the PathJournal down before deleting the files.

Throws:

java.io.IOException

shutdown

public void shutdown()
              throws java.io.IOException

Closes open journal files and stops accepting new FeaturePaths.

Throws:

java.io.IOException