org.apache.gobblin.util.filesystem

Class PathAlterationObserver

java.lang.Object

org.apache.gobblin.util.filesystem.PathAlterationObserver

public class PathAlterationObserver
extends Object

Constructor Summary

Constructors

Constructor and Description
PathAlterationObserver(FileStatusEntry rootEntry, org.apache.hadoop.fs.PathFilter pathFilter) The comparison between path is always case-sensitive in this general file system context.
PathAlterationObserver(org.apache.hadoop.fs.Path directory) Construct an observer for the specified directory.
PathAlterationObserver(org.apache.hadoop.fs.Path directory, org.apache.hadoop.fs.PathFilter pathFilter) Construct an observer for the specified directory and file filter.
PathAlterationObserver(String directoryName) Construct an observer for the specified directory.
PathAlterationObserver(String directoryName, org.apache.hadoop.fs.PathFilter pathFilter) Construct an observer for the specified directory and file filter.

Method Summary

Modifier and Type	Method and Description
void	addListener(PathAlterationListener listener) Add a file system listener.
void	checkAndNotify() Check whether the file and its chlidren have been created, modified or deleted.
void	destroy() Final processing.
Iterable<PathAlterationListener>	getListeners() Returns the set of registered file system listeners.
void	initialize() Initialize the observer.
void	removeListener(PathAlterationListener listener) Remove a file system listener.

Methods inherited from class java.lang.Object

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

Constructor Detail

PathAlterationObserver

public PathAlterationObserver(String directoryName)
                       throws IOException

Construct an observer for the specified directory.

Parameters:

directoryName - the name of the directory to observe

Throws:

IOException

PathAlterationObserver

public PathAlterationObserver(String directoryName,
                              org.apache.hadoop.fs.PathFilter pathFilter)
                       throws IOException

Construct an observer for the specified directory and file filter.

Parameters:

directoryName - the name of the directory to observe

pathFilter - The file filter or null if none

Throws:

IOException

PathAlterationObserver

public PathAlterationObserver(org.apache.hadoop.fs.Path directory)
                       throws IOException

Construct an observer for the specified directory.

Parameters:

directory - the directory to observe

Throws:

IOException

PathAlterationObserver

public PathAlterationObserver(org.apache.hadoop.fs.Path directory,
                              org.apache.hadoop.fs.PathFilter pathFilter)
                       throws IOException

Construct an observer for the specified directory and file filter.

Parameters:

directory - the directory to observe

pathFilter - The file filter or null if none

Throws:

IOException

PathAlterationObserver

public PathAlterationObserver(FileStatusEntry rootEntry,
                              org.apache.hadoop.fs.PathFilter pathFilter)
                       throws IOException

The comparison between path is always case-sensitive in this general file system context.

Throws:

IOException

Method Detail

destroy

public void destroy()

Final processing.

addListener

public void addListener(PathAlterationListener listener)

Add a file system listener.

Parameters:

listener - The file system listener

removeListener

public void removeListener(PathAlterationListener listener)

Remove a file system listener.

Parameters:

listener - The file system listener

getListeners

public Iterable<PathAlterationListener> getListeners()

Returns the set of registered file system listeners.

Returns:

The file system listeners

initialize

public void initialize()
                throws IOException

Initialize the observer.

Throws:

IOException - if an error occurs

checkAndNotify

public void checkAndNotify()
                    throws IOException

Check whether the file and its chlidren have been created, modified or deleted.

Throws:

IOException