stamp.util.os
Class Task

java.lang.Object
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  +--stamp.util.LinkedListItem
        |
        +--stamp.util.os.Task

public abstract class Task

extends LinkedListItem

A task that is run whenever there are free cycles.

To create a new task, you should make a subclass of this class and implement the execute() and wait() methods.

Field Summary

Task	nextTask
int	state State of the task.

Fields inherited from class stamp.util.LinkedListItem

nextItem

Constructor Summary

Task()

Method Summary

void	enterExecute() Change the task to the STATE_READY state.
void	enterWait() Change the task to the STATE_WAITING state.
abstract void	execute() Perform a period task.
void	stop() Change the task to the STATE_STOPPED state.
abstract void	wait() If a task is waiting for an event to occur this is a chance for the task to change its state.

Methods inherited from class java.lang.Object

equals

Field Detail

nextTask

public Task nextTask

state

public int state

State of the task. Initialized to STATE_READY so the task will execute as soon as possible.

Constructor Detail

Task

public Task()

Method Detail

execute

public abstract void execute()

Perform a period task. All subclasses must implement this method. An idle task is executed whenever the GUI is idle. Implementations of execute() should not block to ensure that the interface remains responsive.

wait

public abstract void wait()

If a task is waiting for an event to occur this is a chance for the task to change its state.

enterWait

public void enterWait()

Change the task to the STATE_WAITING state. Tasks in this state will have their wait() method called periodically.

enterExecute

public void enterExecute()

Change the task to the STATE_READY state. Tasks in this state will have their execute() method called periodically.

stop

public void stop()

Change the task to the STATE_STOPPED state. Tasks in this state will not execute at a all.