org.apache.tools.ant.util

Class Watchdog

public class Watchdog extends Object implements Runnable

Generalization of ExecuteWatchdog

Since: Ant 1.5

See Also:

Field Summary
static String	ERROR_INVALID_TIMEOUT Error string.

Constructor Summary
	Watchdog(long timeout) Constructor for Watchdog.

Method Summary
void	addTimeoutObserver(TimeoutObserver to) Add a timeout observer.
protected void	fireTimeoutOccured() Inform the observers that a timeout has occurred.
void	removeTimeoutObserver(TimeoutObserver to) Remove a timeout observer.
void	run() The run method of the watch dog thread.
void	start() Start the watch dog.
void	stop() Stop the watch dog.

Field Detail

ERROR_INVALID_TIMEOUT

public static final String ERROR_INVALID_TIMEOUT

Error string. {@value }

Constructor Detail

Watchdog

public Watchdog(long timeout)

Constructor for Watchdog.

Parameters: timeout the timeout to use in milliseconds (must be >= 1).

Method Detail

addTimeoutObserver

public void addTimeoutObserver(TimeoutObserver to)

Add a timeout observer.

Parameters: to the timeout observer to add.

fireTimeoutOccured

protected final void fireTimeoutOccured()

Inform the observers that a timeout has occurred. This happens in the watchdog thread.

removeTimeoutObserver

public void removeTimeoutObserver(TimeoutObserver to)

Remove a timeout observer.

Parameters: to the timeout observer to remove.

The run method of the watch dog thread. This simply does a wait for the timeout time, and if the stop flag has not been set when the wait has returned or has been interrupted, the watch dog listeners are informed.

start

public void start()

Start the watch dog.

stop

public void stop()

Stop the watch dog.