org.wildfly.clustering.service.concurrent

Interface ServiceExecutor

All Superinterfaces:

Executor

All Known Implementing Classes:

StampedLockServiceExecutor

public interface ServiceExecutor
extends Executor

Allows safe invocation of tasks that require resources not available after close(Runnable) to block a service from stopping.

Author:

Paul Ferraro

Method Summary

Modifier and Type	Method and Description
void	close(Runnable closeTask) Closes the service, executing the specified task, first waiting for any concurrent executions to complete.
<R,E extends Exception> Optional<R>	execute(org.wildfly.common.function.ExceptionSupplier<R,E> executeTask) Executes the specified task, but only if the service was not already closed.
<R> Optional<R>	execute(Supplier<R> executeTask) Executes the specified task, but only if the service was not already closed.

Methods inherited from interface org.wildfly.clustering.service.concurrent.Executor

execute

Methods inherited from interface java.util.concurrent.Executor

execute

Method Detail

execute

<R> Optional<R> execute(Supplier<R> executeTask)

Executes the specified task, but only if the service was not already closed. If service is already closed, the task is not run. If executed, the specified task must return a non-null value, to be distinguishable from a non-execution.

Parameters:

executeTask - a task to execute

Returns:

an optional value that is present only if the specified task was run.

execute

<R,E extends Exception> Optional<R> execute(org.wildfly.common.function.ExceptionSupplier<R,E> executeTask)
                                     throws E extends Exception

Executes the specified task, but only if the service was not already closed. If service is already closed, the task is not run. If executed, the specified task must return a non-null value, to be distinguishable from a non-execution.

Parameters:

executeTask - a task to execute

Returns:

an optional value that is present only if the specified task was run.

Throws:

E - if the task execution failed

E extends Exception

close

void close(Runnable closeTask)

Closes the service, executing the specified task, first waiting for any concurrent executions to complete. The specified task will only execute once, irrespective on subsequent close(Runnable) invocations.

Parameters:

closeTask - a task which closes the service