Package org.apache.tools.ant.util

Class Watchdog

java.lang.Object

org.apache.tools.ant.util.Watchdog

All Implemented Interfaces:

Runnable

public class Watchdog
extends Object
implements Runnable

Generalization of ExecuteWatchdog

Since:

Ant 1.5

See Also:

• ExecuteWatchdog

Field Summary

Fields

Modifier and Type	Field	Description
static final String	ERROR_INVALID_TIMEOUT	Error string.

Constructor Summary

Constructors

Constructor	Description
Watchdog(long timeout)	Constructor for Watchdog.

Method Summary

Modifier and Type	Method	Description
void	addTimeoutObserver(TimeoutObserver to)	Add a timeout observer.
protected final 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.

Methods inherited from class java.lang.Object

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

Field Details

ERROR_INVALID_TIMEOUT

public static final String ERROR_INVALID_TIMEOUT

Error string. "timeout less than 1."

See Also:

• Constant Field Values

Constructor Details

Watchdog

public Watchdog(long timeout)

Constructor for Watchdog.

Parameters:

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

Method Details

addTimeoutObserver

public void addTimeoutObserver(TimeoutObserver to)

Add a timeout observer.

Parameters:

to - the timeout observer to add.

removeTimeoutObserver

public void removeTimeoutObserver(TimeoutObserver to)

Remove a timeout observer.

Parameters:

to - the timeout observer to remove.

fireTimeoutOccured

protected final void fireTimeoutOccured()

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

start

public void start()

Start the watch dog.

stop

public void stop()

Stop the watch dog.

run

public void run()

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.

Specified by:

run in interface Runnable