/** * Possibly initiates an orderly shutdown in which previously * submitted tasks are executed, but no new tasks will be * accepted. Invocation has no effect on execution state if this * is the {@link #commonPool()}, and no additional effect if * already shut down. Tasks that are in the process of being * submitted concurrently during the course of this method may or * may not be rejected. * * @throws SecurityException if a security manager exists and * the caller is not permitted to modify threads * because it does not hold {@link * java.lang.RuntimePermission}{@code ("modifyThread")} */ public void shutdown() { checkPermission(); tryTerminate(false, true); }
/** * Possibly attempts to cancel and/or stop all tasks, and reject * all subsequently submitted tasks. Invocation has no effect on * execution state if this is the {@link #commonPool()}, and no * additional effect if already shut down. Otherwise, tasks that * are in the process of being submitted or executed concurrently * during the course of this method may or may not be * rejected. This method cancels both existing and unexecuted * tasks, in order to permit termination in the presence of task * dependencies. So the method always returns an empty list * (unlike the case for some other Executors). * * @return an empty list * @throws SecurityException if a security manager exists and * the caller is not permitted to modify threads * because it does not hold {@link * java.lang.RuntimePermission}{@code ("modifyThread")} */ public List<Runnable> shutdownNow() { checkPermission(); tryTerminate(true, true); return Collections.emptyList(); }
(asyncMode ? FIFO_QUEUE : LIFO_QUEUE), "ForkJoinPool-" + nextPoolId() + "-worker-"); checkPermission();