controller

Class FileMonitorDaemon

java.lang.Object

java.lang.Thread

controller.FileMonitorDaemon

All Implemented Interfaces:

java.lang.Runnable

public class FileMonitorDaemon
extends java.lang.Thread

The FileMonitorDaemon is a daemon that observes file events. If a file of an digital object under observation is altered, the meta data that could have changed can be extracted again. If a file is deleted, it has to be removed from the data structure. The ExtractionController looks for altered or deleted files in the modifiedParts and removedPartsTable of this class. Just a synchronized access is allowed.

See Also:

ExtractionController

Nested Class Summary

Nested classes/interfaces inherited from class java.lang.Thread

java.lang.Thread.State, java.lang.Thread.UncaughtExceptionHandler

Field Summary

Fields

Modifier and Type	Field and Description
protected ExtractionController	controller
protected java.nio.file.WatchService	fileWatcher
protected java.util.HashSet<java.nio.file.Path>	monitoredFiles This HashSet contains the monitored files, so the events can be filtered and just be handled if thrown by one of these files.

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

Constructors

Constructor and Description
FileMonitorDaemon(ExtractionController controller)

Method Summary

Modifier and Type	Method and Description
protected void	createWatcher()
protected void	observe()
void	registerFile(java.nio.file.Path path) Only the parent directories can be registered.
void	run()
void	update()

Methods inherited from class java.lang.Thread

activeCount, checkAccess, clone, countStackFrames, currentThread, destroy, dumpStack, enumerate, getAllStackTraces, getContextClassLoader, getDefaultUncaughtExceptionHandler, getId, getName, getPriority, getStackTrace, getState, getThreadGroup, getUncaughtExceptionHandler, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setDefaultUncaughtExceptionHandler, setName, setPriority, setUncaughtExceptionHandler, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Field Detail

fileWatcher

protected java.nio.file.WatchService fileWatcher

monitoredFiles

protected final java.util.HashSet<java.nio.file.Path> monitoredFiles

This HashSet contains the monitored files, so the events can be filtered and just be handled if thrown by one of these files.

controller

protected final ExtractionController controller

Constructor Detail

FileMonitorDaemon

public FileMonitorDaemon(ExtractionController controller)

Parameters:

controller -

Method Detail

run

public void run()

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class java.lang.Thread

createWatcher

protected void createWatcher()

observe

protected void observe()
                throws java.lang.InterruptedException

Throws:

java.lang.InterruptedException

update

public void update()

registerFile

public void registerFile(java.nio.file.Path path)

Only the parent directories can be registered.

Parameters:

path -