org.usefultoys.slf4j.watcher

Class WatcherSingleton

java.lang.Object

org.usefultoys.slf4j.watcher.WatcherSingleton

public final class WatcherSingleton
extends Object

Manages the default watcher singleton and provides methods to execute it periodically in simple architectures. This class is not suitable for JavaEE environments that manage threads internally.

The default watcher instance is created at application startup and is named according to the system property slf4jtoys.watcher.name, which defaults to watcher. The default watcher cannot be reassigned at runtime.

This utility class provides two mechanisms for periodic execution:

• A ScheduledExecutorService-based executor
• A Timer-based timer

Note: Ensure proper lifecycle management when using this class to avoid resource leaks.

Author:

Daniel Felix Ferber

Field Summary

Fields

Modifier and Type	Field and Description
Watcher	DEFAULT_WATCHER The default watcher instance.

Constructor Summary

Constructors

Constructor and Description
WatcherSingleton()

Method Summary

Modifier and Type	Method and Description
void	startDefaultWatcherExecutor() Starts the executor that periodically invokes the default watcher to report system status.
void	startDefaultWatcherTimer() Starts the timer that periodically invokes the default watcher to report system status.
void	stopDefaultWatcherExecutor() Stops the executor that periodically invokes the default watcher periodically.
void	stopDefaultWatcherTimer() Stops the timer that periodically invokes the default watcher periodically.

Methods inherited from class java.lang.Object

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

Field Detail

DEFAULT_WATCHER

public final Watcher DEFAULT_WATCHER

The default watcher instance. Created at application startup and named using the system property slf4jtoys.watcher.name, defaulting to watcher.

Constructor Detail

WatcherSingleton

public WatcherSingleton()

Method Detail

startDefaultWatcherExecutor

public void startDefaultWatcherExecutor()

Starts the executor that periodically invokes the default watcher to report system status. Intended for simple architectures. May not be suitable for JavaEE environments that manage threads by itself.

stopDefaultWatcherExecutor

public void stopDefaultWatcherExecutor()

Stops the executor that periodically invokes the default watcher periodically.

startDefaultWatcherTimer

public void startDefaultWatcherTimer()

Starts the timer that periodically invokes the default watcher to report system status. Intended for simple architectures. May not be suitable for JavaEE environments that manage threads by itself.

stopDefaultWatcherTimer

public void stopDefaultWatcherTimer()

Stops the timer that periodically invokes the default watcher periodically.