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org.apache.jetspeed.services.registry
Class DatabaseRegistryWatcher

java.lang.Object
  |
  +--java.lang.Thread
        |
        +--org.apache.jetspeed.services.registry.DatabaseRegistryWatcher

All Implemented Interfaces:

java.lang.Runnable

public class DatabaseRegistryWatcher

extends java.lang.Thread

Registry watcher for Database Registry service. Keeps any cached registry entries refreshed with backend database.

Version:

$Id: DatabaseRegistryWatcher.java,v 1.2 2004/02/23 03:31:50 jford Exp $

Author:

Suchisubhra Sinha

Field Summary

static int

SCAN_RATE Minimum scan rate for evaluating file refresh

Fields inherited from class java.lang.Thread

MAX_PRIORITY, MIN_PRIORITY, NORM_PRIORITY

Constructor Summary

DatabaseRegistryWatcher()
Creates a default RegistryWatcher

Method Summary

void	changeBase(java.util.Vector f) Change the base file to be monitored by this watcher
long	getRefreshRate()
org.apache.jetspeed.services.registry.FileRegistry	getSubscriber()
void	run() Main routine for the monitor which periodically checks whether the filex have been modified.
void	setDone() Mark that the watching thread should be stopped
void	setRefreshRate(long refresh) Sets the refresh rate for this watcher
void	setSubscriber(org.apache.jetspeed.services.registry.FileRegistry registry) Modifies the subscriber to this Watcher

Methods inherited from class java.lang.Thread

activeCount, checkAccess, countStackFrames, currentThread, destroy, dumpStack, enumerate, getContextClassLoader, getName, getPriority, getThreadGroup, holdsLock, interrupt, interrupted, isAlive, isDaemon, isInterrupted, join, join, join, resume, setContextClassLoader, setDaemon, setName, setPriority, sleep, sleep, start, stop, stop, suspend, toString, yield

Methods inherited from class java.lang.Object

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

Field Detail

SCAN_RATE

public static final int SCAN_RATE

Minimum scan rate for evaluating file refresh

See Also:

Constant Field Values

Constructor Detail

DatabaseRegistryWatcher

public DatabaseRegistryWatcher()

Creates a default RegistryWatcher

Method Detail

setSubscriber

public void setSubscriber(org.apache.jetspeed.services.registry.FileRegistry registry)

Modifies the subscriber to this Watcher

Parameters:

registry - the new registry subscriber

getSubscriber

public org.apache.jetspeed.services.registry.FileRegistry getSubscriber()

Returns:

the subscriber to this watcher

setRefreshRate

public void setRefreshRate(long refresh)

Sets the refresh rate for this watcher

Parameters:

refresh - the refresh rate in seconds

getRefreshRate

public long getRefreshRate()

Returns:

the refresh rate, in seconds, of this watcher

changeBase

public void changeBase(java.util.Vector f)

Change the base file to be monitored by this watcher

Parameters:

f - the file to monitor

run

public void run()

Main routine for the monitor which periodically checks whether the filex have been modified.

The algorithm used does not guarantee a constant refresh rate between invocations.

Specified by:

run in interface java.lang.Runnable

Overrides:

run in class java.lang.Thread

setDone

public void setDone()

Mark that the watching thread should be stopped