de.javagl.swing.tasks.executors

Interface ExecutorObserver

public interface ExecutorObserver

Interface for classes that may be informed about the execution status of tasks in an executor that was created with the ObservableExecutors class.

If this observer is attached to an ObservableExecutorService, then the Runnable instances that it receives should always be ObservableTask instances. The ObservableExecutors.getInnerTask(Runnable, Class) method may be used to extract the task that originally has been submitted to the executor service.
Implementing classes should make sure that none of the methods in this interface ever throw an exception.

Method Summary

Modifier and Type	Method and Description
void	afterExecute(Runnable r, Throwable t) Will be called after the given task was executed
void	beforeExecute(Thread t, Runnable r) Will be called before the given thread executes the given task.
void	scheduled(Runnable r) Will be called when the given task was scheduled for execution in the executor service.
void	tasksFinished() Will be called after all tasks have been finished.

Method Detail

scheduled

void scheduled(Runnable r)

Will be called when the given task was scheduled for execution in the executor service.

Parameters:

r - The task.

beforeExecute

void beforeExecute(Thread t,
                   Runnable r)

Will be called before the given thread executes the given task.

Parameters:

t - The thread

r - The task

afterExecute

void afterExecute(Runnable r,
                  Throwable t)

Will be called after the given task was executed

Parameters:

r - The task

t - A throwable that may have been caused

tasksFinished

void tasksFinished()

Will be called after all tasks have been finished. That is, when afterExecute(Runnable, Throwable) was called and no new tasks have been scheduled(Runnable) in the meantime.