diff options
Diffstat (limited to 'src/actors/scala/actors/threadpool/CompletionService.java')
-rw-r--r-- | src/actors/scala/actors/threadpool/CompletionService.java | 97 |
1 files changed, 0 insertions, 97 deletions
diff --git a/src/actors/scala/actors/threadpool/CompletionService.java b/src/actors/scala/actors/threadpool/CompletionService.java deleted file mode 100644 index 219ab7affa..0000000000 --- a/src/actors/scala/actors/threadpool/CompletionService.java +++ /dev/null @@ -1,97 +0,0 @@ -/* - * Written by Doug Lea with assistance from members of JCP JSR-166 - * Expert Group and released to the public domain, as explained at - * http://creativecommons.org/licenses/publicdomain - */ - -package scala.actors.threadpool; - -/** - * A service that decouples the production of new asynchronous tasks - * from the consumption of the results of completed tasks. Producers - * <tt>submit</tt> tasks for execution. Consumers <tt>take</tt> - * completed tasks and process their results in the order they - * complete. A <tt>CompletionService</tt> can for example be used to - * manage asynchronous IO, in which tasks that perform reads are - * submitted in one part of a program or system, and then acted upon - * in a different part of the program when the reads complete, - * possibly in a different order than they were requested. - * - * <p>Typically, a <tt>CompletionService</tt> relies on a separate - * {@link Executor} to actually execute the tasks, in which case the - * <tt>CompletionService</tt> only manages an internal completion - * queue. The {@link ExecutorCompletionService} class provides an - * implementation of this approach. - * - * <p>Memory consistency effects: Actions in a thread prior to - * submitting a task to a {@code CompletionService} - * <a href="package-summary.html#MemoryVisibility"><i>happen-before</i></a> - * actions taken by that task, which in turn <i>happen-before</i> - * actions following a successful return from the corresponding {@code take()}. - * - */ -public interface CompletionService { - /** - * Submits a value-returning task for execution and returns a Future - * representing the pending results of the task. Upon completion, - * this task may be taken or polled. - * - * @param task the task to submit - * @return a Future representing pending completion of the task - * @throws RejectedExecutionException if the task cannot be - * scheduled for execution - * @throws NullPointerException if the task is null - */ - Future submit(Callable task); - - /** - * Submits a Runnable task for execution and returns a Future - * representing that task. Upon completion, this task may be - * taken or polled. - * - * @param task the task to submit - * @param result the result to return upon successful completion - * @return a Future representing pending completion of the task, - * and whose <tt>get()</tt> method will return the given - * result value upon completion - * @throws RejectedExecutionException if the task cannot be - * scheduled for execution - * @throws NullPointerException if the task is null - */ - Future submit(Runnable task, Object result); - - /** - * Retrieves and removes the Future representing the next - * completed task, waiting if none are yet present. - * - * @return the Future representing the next completed task - * @throws InterruptedException if interrupted while waiting - */ - Future take() throws InterruptedException; - - - /** - * Retrieves and removes the Future representing the next - * completed task or <tt>null</tt> if none are present. - * - * @return the Future representing the next completed task, or - * <tt>null</tt> if none are present - */ - Future poll(); - - /** - * Retrieves and removes the Future representing the next - * completed task, waiting if necessary up to the specified wait - * time if none are yet present. - * - * @param timeout how long to wait before giving up, in units of - * <tt>unit</tt> - * @param unit a <tt>TimeUnit</tt> determining how to interpret the - * <tt>timeout</tt> parameter - * @return the Future representing the next completed task or - * <tt>null</tt> if the specified waiting time elapses - * before one is present - * @throws InterruptedException if interrupted while waiting - */ - Future poll(long timeout, TimeUnit unit) throws InterruptedException; -} |