| /* |
| * 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 java.util.concurrent; |
| |
| import java.security.AccessControlContext; |
| import java.security.AccessControlException; |
| import java.security.AccessController; |
| import java.security.PrivilegedAction; |
| import java.security.PrivilegedActionException; |
| import java.security.PrivilegedExceptionAction; |
| import java.util.Collection; |
| import java.util.List; |
| import java.util.concurrent.atomic.AtomicInteger; |
| // import sun.security.util.SecurityConstants; // android-removed |
| |
| /** |
| * Factory and utility methods for {@link Executor}, {@link |
| * ExecutorService}, {@link ScheduledExecutorService}, {@link |
| * ThreadFactory}, and {@link Callable} classes defined in this |
| * package. This class supports the following kinds of methods: |
| * |
| * <ul> |
| * <li> Methods that create and return an {@link ExecutorService} |
| * set up with commonly useful configuration settings. |
| * <li> Methods that create and return a {@link ScheduledExecutorService} |
| * set up with commonly useful configuration settings. |
| * <li> Methods that create and return a "wrapped" ExecutorService, that |
| * disables reconfiguration by making implementation-specific methods |
| * inaccessible. |
| * <li> Methods that create and return a {@link ThreadFactory} |
| * that sets newly created threads to a known state. |
| * <li> Methods that create and return a {@link Callable} |
| * out of other closure-like forms, so they can be used |
| * in execution methods requiring <tt>Callable</tt>. |
| * </ul> |
| * |
| * @since 1.5 |
| * @author Doug Lea |
| */ |
| public class Executors { |
| |
| /** |
| * Creates a thread pool that reuses a fixed number of threads |
| * operating off a shared unbounded queue. At any point, at most |
| * <tt>nThreads</tt> threads will be active processing tasks. |
| * If additional tasks are submitted when all threads are active, |
| * they will wait in the queue until a thread is available. |
| * If any thread terminates due to a failure during execution |
| * prior to shutdown, a new one will take its place if needed to |
| * execute subsequent tasks. The threads in the pool will exist |
| * until it is explicitly {@link ExecutorService#shutdown shutdown}. |
| * |
| * @param nThreads the number of threads in the pool |
| * @return the newly created thread pool |
| * @throws IllegalArgumentException if <tt>nThreads <= 0</tt> |
| */ |
| public static ExecutorService newFixedThreadPool(int nThreads) { |
| return new ThreadPoolExecutor(nThreads, nThreads, |
| 0L, TimeUnit.MILLISECONDS, |
| new LinkedBlockingQueue<Runnable>()); |
| } |
| |
| /** |
| * Creates a thread pool that reuses a fixed number of threads |
| * operating off a shared unbounded queue, using the provided |
| * ThreadFactory to create new threads when needed. At any point, |
| * at most <tt>nThreads</tt> threads will be active processing |
| * tasks. If additional tasks are submitted when all threads are |
| * active, they will wait in the queue until a thread is |
| * available. If any thread terminates due to a failure during |
| * execution prior to shutdown, a new one will take its place if |
| * needed to execute subsequent tasks. The threads in the pool will |
| * exist until it is explicitly {@link ExecutorService#shutdown |
| * shutdown}. |
| * |
| * @param nThreads the number of threads in the pool |
| * @param threadFactory the factory to use when creating new threads |
| * @return the newly created thread pool |
| * @throws NullPointerException if threadFactory is null |
| * @throws IllegalArgumentException if <tt>nThreads <= 0</tt> |
| */ |
| public static ExecutorService newFixedThreadPool(int nThreads, ThreadFactory threadFactory) { |
| return new ThreadPoolExecutor(nThreads, nThreads, |
| 0L, TimeUnit.MILLISECONDS, |
| new LinkedBlockingQueue<Runnable>(), |
| threadFactory); |
| } |
| |
| /** |
| * Creates an Executor that uses a single worker thread operating |
| * off an unbounded queue. (Note however that if this single |
| * thread terminates due to a failure during execution prior to |
| * shutdown, a new one will take its place if needed to execute |
| * subsequent tasks.) Tasks are guaranteed to execute |
| * sequentially, and no more than one task will be active at any |
| * given time. Unlike the otherwise equivalent |
| * <tt>newFixedThreadPool(1)</tt> the returned executor is |
| * guaranteed not to be reconfigurable to use additional threads. |
| * |
| * @return the newly created single-threaded Executor |
| */ |
| public static ExecutorService newSingleThreadExecutor() { |
| return new FinalizableDelegatedExecutorService |
| (new ThreadPoolExecutor(1, 1, |
| 0L, TimeUnit.MILLISECONDS, |
| new LinkedBlockingQueue<Runnable>())); |
| } |
| |
| /** |
| * Creates an Executor that uses a single worker thread operating |
| * off an unbounded queue, and uses the provided ThreadFactory to |
| * create a new thread when needed. Unlike the otherwise |
| * equivalent <tt>newFixedThreadPool(1, threadFactory)</tt> the |
| * returned executor is guaranteed not to be reconfigurable to use |
| * additional threads. |
| * |
| * @param threadFactory the factory to use when creating new |
| * threads |
| * |
| * @return the newly created single-threaded Executor |
| * @throws NullPointerException if threadFactory is null |
| */ |
| public static ExecutorService newSingleThreadExecutor(ThreadFactory threadFactory) { |
| return new FinalizableDelegatedExecutorService |
| (new ThreadPoolExecutor(1, 1, |
| 0L, TimeUnit.MILLISECONDS, |
| new LinkedBlockingQueue<Runnable>(), |
| threadFactory)); |
| } |
| |
| /** |
| * Creates a thread pool that creates new threads as needed, but |
| * will reuse previously constructed threads when they are |
| * available. These pools will typically improve the performance |
| * of programs that execute many short-lived asynchronous tasks. |
| * Calls to <tt>execute</tt> will reuse previously constructed |
| * threads if available. If no existing thread is available, a new |
| * thread will be created and added to the pool. Threads that have |
| * not been used for sixty seconds are terminated and removed from |
| * the cache. Thus, a pool that remains idle for long enough will |
| * not consume any resources. Note that pools with similar |
| * properties but different details (for example, timeout parameters) |
| * may be created using {@link ThreadPoolExecutor} constructors. |
| * |
| * @return the newly created thread pool |
| */ |
| public static ExecutorService newCachedThreadPool() { |
| return new ThreadPoolExecutor(0, Integer.MAX_VALUE, |
| 60L, TimeUnit.SECONDS, |
| new SynchronousQueue<Runnable>()); |
| } |
| |
| /** |
| * Creates a thread pool that creates new threads as needed, but |
| * will reuse previously constructed threads when they are |
| * available, and uses the provided |
| * ThreadFactory to create new threads when needed. |
| * @param threadFactory the factory to use when creating new threads |
| * @return the newly created thread pool |
| * @throws NullPointerException if threadFactory is null |
| */ |
| public static ExecutorService newCachedThreadPool(ThreadFactory threadFactory) { |
| return new ThreadPoolExecutor(0, Integer.MAX_VALUE, |
| 60L, TimeUnit.SECONDS, |
| new SynchronousQueue<Runnable>(), |
| threadFactory); |
| } |
| |
| /** |
| * Creates a single-threaded executor that can schedule commands |
| * to run after a given delay, or to execute periodically. |
| * (Note however that if this single |
| * thread terminates due to a failure during execution prior to |
| * shutdown, a new one will take its place if needed to execute |
| * subsequent tasks.) Tasks are guaranteed to execute |
| * sequentially, and no more than one task will be active at any |
| * given time. Unlike the otherwise equivalent |
| * <tt>newScheduledThreadPool(1)</tt> the returned executor is |
| * guaranteed not to be reconfigurable to use additional threads. |
| * @return the newly created scheduled executor |
| */ |
| public static ScheduledExecutorService newSingleThreadScheduledExecutor() { |
| return new DelegatedScheduledExecutorService |
| (new ScheduledThreadPoolExecutor(1)); |
| } |
| |
| /** |
| * Creates a single-threaded executor that can schedule commands |
| * to run after a given delay, or to execute periodically. (Note |
| * however that if this single thread terminates due to a failure |
| * during execution prior to shutdown, a new one will take its |
| * place if needed to execute subsequent tasks.) Tasks are |
| * guaranteed to execute sequentially, and no more than one task |
| * will be active at any given time. Unlike the otherwise |
| * equivalent <tt>newScheduledThreadPool(1, threadFactory)</tt> |
| * the returned executor is guaranteed not to be reconfigurable to |
| * use additional threads. |
| * @param threadFactory the factory to use when creating new |
| * threads |
| * @return a newly created scheduled executor |
| * @throws NullPointerException if threadFactory is null |
| */ |
| public static ScheduledExecutorService newSingleThreadScheduledExecutor(ThreadFactory threadFactory) { |
| return new DelegatedScheduledExecutorService |
| (new ScheduledThreadPoolExecutor(1, threadFactory)); |
| } |
| |
| /** |
| * Creates a thread pool that can schedule commands to run after a |
| * given delay, or to execute periodically. |
| * @param corePoolSize the number of threads to keep in the pool, |
| * even if they are idle. |
| * @return a newly created scheduled thread pool |
| * @throws IllegalArgumentException if <tt>corePoolSize < 0</tt> |
| */ |
| public static ScheduledExecutorService newScheduledThreadPool(int corePoolSize) { |
| return new ScheduledThreadPoolExecutor(corePoolSize); |
| } |
| |
| /** |
| * Creates a thread pool that can schedule commands to run after a |
| * given delay, or to execute periodically. |
| * @param corePoolSize the number of threads to keep in the pool, |
| * even if they are idle. |
| * @param threadFactory the factory to use when the executor |
| * creates a new thread. |
| * @return a newly created scheduled thread pool |
| * @throws IllegalArgumentException if <tt>corePoolSize < 0</tt> |
| * @throws NullPointerException if threadFactory is null |
| */ |
| public static ScheduledExecutorService newScheduledThreadPool( |
| int corePoolSize, ThreadFactory threadFactory) { |
| return new ScheduledThreadPoolExecutor(corePoolSize, threadFactory); |
| } |
| |
| |
| /** |
| * Returns an object that delegates all defined {@link |
| * ExecutorService} methods to the given executor, but not any |
| * other methods that might otherwise be accessible using |
| * casts. This provides a way to safely "freeze" configuration and |
| * disallow tuning of a given concrete implementation. |
| * @param executor the underlying implementation |
| * @return an <tt>ExecutorService</tt> instance |
| * @throws NullPointerException if executor null |
| */ |
| public static ExecutorService unconfigurableExecutorService(ExecutorService executor) { |
| if (executor == null) |
| throw new NullPointerException(); |
| return new DelegatedExecutorService(executor); |
| } |
| |
| /** |
| * Returns an object that delegates all defined {@link |
| * ScheduledExecutorService} methods to the given executor, but |
| * not any other methods that might otherwise be accessible using |
| * casts. This provides a way to safely "freeze" configuration and |
| * disallow tuning of a given concrete implementation. |
| * @param executor the underlying implementation |
| * @return a <tt>ScheduledExecutorService</tt> instance |
| * @throws NullPointerException if executor null |
| */ |
| public static ScheduledExecutorService unconfigurableScheduledExecutorService(ScheduledExecutorService executor) { |
| if (executor == null) |
| throw new NullPointerException(); |
| return new DelegatedScheduledExecutorService(executor); |
| } |
| |
| /** |
| * Returns a default thread factory used to create new threads. |
| * This factory creates all new threads used by an Executor in the |
| * same {@link ThreadGroup}. If there is a {@link |
| * java.lang.SecurityManager}, it uses the group of {@link |
| * System#getSecurityManager}, else the group of the thread |
| * invoking this <tt>defaultThreadFactory</tt> method. Each new |
| * thread is created as a non-daemon thread with priority set to |
| * the smaller of <tt>Thread.NORM_PRIORITY</tt> and the maximum |
| * priority permitted in the thread group. New threads have names |
| * accessible via {@link Thread#getName} of |
| * <em>pool-N-thread-M</em>, where <em>N</em> is the sequence |
| * number of this factory, and <em>M</em> is the sequence number |
| * of the thread created by this factory. |
| * @return a thread factory |
| */ |
| public static ThreadFactory defaultThreadFactory() { |
| return new DefaultThreadFactory(); |
| } |
| |
| /** |
| * Returns a thread factory used to create new threads that |
| * have the same permissions as the current thread. |
| * This factory creates threads with the same settings as {@link |
| * Executors#defaultThreadFactory}, additionally setting the |
| * AccessControlContext and contextClassLoader of new threads to |
| * be the same as the thread invoking this |
| * <tt>privilegedThreadFactory</tt> method. A new |
| * <tt>privilegedThreadFactory</tt> can be created within an |
| * {@link AccessController#doPrivileged} action setting the |
| * current thread's access control context to create threads with |
| * the selected permission settings holding within that action. |
| * |
| * <p> Note that while tasks running within such threads will have |
| * the same access control and class loader settings as the |
| * current thread, they need not have the same {@link |
| * java.lang.ThreadLocal} or {@link |
| * java.lang.InheritableThreadLocal} values. If necessary, |
| * particular values of thread locals can be set or reset before |
| * any task runs in {@link ThreadPoolExecutor} subclasses using |
| * {@link ThreadPoolExecutor#beforeExecute}. Also, if it is |
| * necessary to initialize worker threads to have the same |
| * InheritableThreadLocal settings as some other designated |
| * thread, you can create a custom ThreadFactory in which that |
| * thread waits for and services requests to create others that |
| * will inherit its values. |
| * |
| * @return a thread factory |
| * @throws AccessControlException if the current access control |
| * context does not have permission to both get and set context |
| * class loader. |
| */ |
| public static ThreadFactory privilegedThreadFactory() { |
| return new PrivilegedThreadFactory(); |
| } |
| |
| /** |
| * Returns a {@link Callable} object that, when |
| * called, runs the given task and returns the given result. This |
| * can be useful when applying methods requiring a |
| * <tt>Callable</tt> to an otherwise resultless action. |
| * @param task the task to run |
| * @param result the result to return |
| * @return a callable object |
| * @throws NullPointerException if task null |
| */ |
| public static <T> Callable<T> callable(Runnable task, T result) { |
| if (task == null) |
| throw new NullPointerException(); |
| return new RunnableAdapter<T>(task, result); |
| } |
| |
| /** |
| * Returns a {@link Callable} object that, when |
| * called, runs the given task and returns <tt>null</tt>. |
| * @param task the task to run |
| * @return a callable object |
| * @throws NullPointerException if task null |
| */ |
| public static Callable<Object> callable(Runnable task) { |
| if (task == null) |
| throw new NullPointerException(); |
| return new RunnableAdapter<Object>(task, null); |
| } |
| |
| /** |
| * Returns a {@link Callable} object that, when |
| * called, runs the given privileged action and returns its result. |
| * @param action the privileged action to run |
| * @return a callable object |
| * @throws NullPointerException if action null |
| */ |
| public static Callable<Object> callable(final PrivilegedAction<?> action) { |
| if (action == null) |
| throw new NullPointerException(); |
| return new Callable<Object>() { |
| public Object call() { return action.run(); }}; |
| } |
| |
| /** |
| * Returns a {@link Callable} object that, when |
| * called, runs the given privileged exception action and returns |
| * its result. |
| * @param action the privileged exception action to run |
| * @return a callable object |
| * @throws NullPointerException if action null |
| */ |
| public static Callable<Object> callable(final PrivilegedExceptionAction<?> action) { |
| if (action == null) |
| throw new NullPointerException(); |
| return new Callable<Object>() { |
| public Object call() throws Exception { return action.run(); }}; |
| } |
| |
| /** |
| * Returns a {@link Callable} object that will, when |
| * called, execute the given <tt>callable</tt> under the current |
| * access control context. This method should normally be |
| * invoked within an {@link AccessController#doPrivileged} action |
| * to create callables that will, if possible, execute under the |
| * selected permission settings holding within that action; or if |
| * not possible, throw an associated {@link |
| * AccessControlException}. |
| * @param callable the underlying task |
| * @return a callable object |
| * @throws NullPointerException if callable null |
| * |
| */ |
| public static <T> Callable<T> privilegedCallable(Callable<T> callable) { |
| if (callable == null) |
| throw new NullPointerException(); |
| return new PrivilegedCallable<T>(callable); |
| } |
| |
| /** |
| * Returns a {@link Callable} object that will, when |
| * called, execute the given <tt>callable</tt> under the current |
| * access control context, with the current context class loader |
| * as the context class loader. This method should normally be |
| * invoked within an {@link AccessController#doPrivileged} action |
| * to create callables that will, if possible, execute under the |
| * selected permission settings holding within that action; or if |
| * not possible, throw an associated {@link |
| * AccessControlException}. |
| * @param callable the underlying task |
| * |
| * @return a callable object |
| * @throws NullPointerException if callable null |
| * @throws AccessControlException if the current access control |
| * context does not have permission to both set and get context |
| * class loader. |
| */ |
| public static <T> Callable<T> privilegedCallableUsingCurrentClassLoader(Callable<T> callable) { |
| if (callable == null) |
| throw new NullPointerException(); |
| return new PrivilegedCallableUsingCurrentClassLoader<T>(callable); |
| } |
| |
| // Non-public classes supporting the public methods |
| |
| /** |
| * A callable that runs given task and returns given result |
| */ |
| static final class RunnableAdapter<T> implements Callable<T> { |
| final Runnable task; |
| final T result; |
| RunnableAdapter(Runnable task, T result) { |
| this.task = task; |
| this.result = result; |
| } |
| public T call() { |
| task.run(); |
| return result; |
| } |
| } |
| |
| /** |
| * A callable that runs under established access control settings |
| */ |
| static final class PrivilegedCallable<T> implements Callable<T> { |
| private final Callable<T> task; |
| private final AccessControlContext acc; |
| |
| PrivilegedCallable(Callable<T> task) { |
| this.task = task; |
| this.acc = AccessController.getContext(); |
| } |
| |
| public T call() throws Exception { |
| try { |
| return AccessController.doPrivileged( |
| new PrivilegedExceptionAction<T>() { |
| public T run() throws Exception { |
| return task.call(); |
| } |
| }, acc); |
| } catch (PrivilegedActionException e) { |
| throw e.getException(); |
| } |
| } |
| } |
| |
| /** |
| * A callable that runs under established access control settings and |
| * current ClassLoader |
| */ |
| static final class PrivilegedCallableUsingCurrentClassLoader<T> implements Callable<T> { |
| private final Callable<T> task; |
| private final AccessControlContext acc; |
| private final ClassLoader ccl; |
| |
| PrivilegedCallableUsingCurrentClassLoader(Callable<T> task) { |
| SecurityManager sm = System.getSecurityManager(); |
| if (sm != null) { |
| // Calls to getContextClassLoader from this class |
| // never trigger a security check, but we check |
| // whether our callers have this permission anyways. |
| sm.checkPermission(new RuntimePermission("getContextClassLoader")); // android-changed |
| |
| // Whether setContextClassLoader turns out to be necessary |
| // or not, we fail fast if permission is not available. |
| sm.checkPermission(new RuntimePermission("setContextClassLoader")); |
| } |
| this.task = task; |
| this.acc = AccessController.getContext(); |
| this.ccl = Thread.currentThread().getContextClassLoader(); |
| } |
| |
| public T call() throws Exception { |
| try { |
| return AccessController.doPrivileged( |
| new PrivilegedExceptionAction<T>() { |
| public T run() throws Exception { |
| ClassLoader savedcl = null; |
| Thread t = Thread.currentThread(); |
| try { |
| ClassLoader cl = t.getContextClassLoader(); |
| if (ccl != cl) { |
| t.setContextClassLoader(ccl); |
| savedcl = cl; |
| } |
| return task.call(); |
| } finally { |
| if (savedcl != null) |
| t.setContextClassLoader(savedcl); |
| } |
| } |
| }, acc); |
| } catch (PrivilegedActionException e) { |
| throw e.getException(); |
| } |
| } |
| } |
| |
| /** |
| * The default thread factory |
| */ |
| static class DefaultThreadFactory implements ThreadFactory { |
| private static final AtomicInteger poolNumber = new AtomicInteger(1); |
| private final ThreadGroup group; |
| private final AtomicInteger threadNumber = new AtomicInteger(1); |
| private final String namePrefix; |
| |
| DefaultThreadFactory() { |
| SecurityManager s = System.getSecurityManager(); |
| group = (s != null)? s.getThreadGroup() : |
| Thread.currentThread().getThreadGroup(); |
| namePrefix = "pool-" + |
| poolNumber.getAndIncrement() + |
| "-thread-"; |
| } |
| |
| public Thread newThread(Runnable r) { |
| Thread t = new Thread(group, r, |
| namePrefix + threadNumber.getAndIncrement(), |
| 0); |
| if (t.isDaemon()) |
| t.setDaemon(false); |
| if (t.getPriority() != Thread.NORM_PRIORITY) |
| t.setPriority(Thread.NORM_PRIORITY); |
| return t; |
| } |
| } |
| |
| /** |
| * Thread factory capturing access control context and class loader |
| */ |
| static class PrivilegedThreadFactory extends DefaultThreadFactory { |
| private final AccessControlContext acc; |
| private final ClassLoader ccl; |
| |
| PrivilegedThreadFactory() { |
| super(); |
| SecurityManager sm = System.getSecurityManager(); |
| if (sm != null) { |
| // Calls to getContextClassLoader from this class |
| // never trigger a security check, but we check |
| // whether our callers have this permission anyways. |
| sm.checkPermission(new RuntimePermission("getContextClassLoader")); // android-changed |
| |
| // Fail fast |
| sm.checkPermission(new RuntimePermission("setContextClassLoader")); |
| } |
| this.acc = AccessController.getContext(); |
| this.ccl = Thread.currentThread().getContextClassLoader(); |
| } |
| |
| public Thread newThread(final Runnable r) { |
| return super.newThread(new Runnable() { |
| public void run() { |
| AccessController.doPrivileged(new PrivilegedAction<Void>() { |
| public Void run() { |
| Thread.currentThread().setContextClassLoader(ccl); |
| r.run(); |
| return null; |
| } |
| }, acc); |
| } |
| }); |
| } |
| } |
| |
| /** |
| * A wrapper class that exposes only the ExecutorService methods |
| * of an ExecutorService implementation. |
| */ |
| static class DelegatedExecutorService extends AbstractExecutorService { |
| private final ExecutorService e; |
| DelegatedExecutorService(ExecutorService executor) { e = executor; } |
| public void execute(Runnable command) { e.execute(command); } |
| public void shutdown() { e.shutdown(); } |
| public List<Runnable> shutdownNow() { return e.shutdownNow(); } |
| public boolean isShutdown() { return e.isShutdown(); } |
| public boolean isTerminated() { return e.isTerminated(); } |
| public boolean awaitTermination(long timeout, TimeUnit unit) |
| throws InterruptedException { |
| return e.awaitTermination(timeout, unit); |
| } |
| public Future<?> submit(Runnable task) { |
| return e.submit(task); |
| } |
| public <T> Future<T> submit(Callable<T> task) { |
| return e.submit(task); |
| } |
| public <T> Future<T> submit(Runnable task, T result) { |
| return e.submit(task, result); |
| } |
| public <T> List<Future<T>> invokeAll(Collection<? extends Callable<T>> tasks) |
| throws InterruptedException { |
| return e.invokeAll(tasks); |
| } |
| public <T> List<Future<T>> invokeAll(Collection<? extends Callable<T>> tasks, |
| long timeout, TimeUnit unit) |
| throws InterruptedException { |
| return e.invokeAll(tasks, timeout, unit); |
| } |
| public <T> T invokeAny(Collection<? extends Callable<T>> tasks) |
| throws InterruptedException, ExecutionException { |
| return e.invokeAny(tasks); |
| } |
| public <T> T invokeAny(Collection<? extends Callable<T>> tasks, |
| long timeout, TimeUnit unit) |
| throws InterruptedException, ExecutionException, TimeoutException { |
| return e.invokeAny(tasks, timeout, unit); |
| } |
| } |
| |
| static class FinalizableDelegatedExecutorService |
| extends DelegatedExecutorService { |
| FinalizableDelegatedExecutorService(ExecutorService executor) { |
| super(executor); |
| } |
| @Override protected void finalize() throws Throwable { |
| try { |
| super.shutdown(); |
| } finally { |
| super.finalize(); |
| } |
| } |
| } |
| |
| /** |
| * A wrapper class that exposes only the ScheduledExecutorService |
| * methods of a ScheduledExecutorService implementation. |
| */ |
| static class DelegatedScheduledExecutorService |
| extends DelegatedExecutorService |
| implements ScheduledExecutorService { |
| private final ScheduledExecutorService e; |
| DelegatedScheduledExecutorService(ScheduledExecutorService executor) { |
| super(executor); |
| e = executor; |
| } |
| public ScheduledFuture<?> schedule(Runnable command, long delay, TimeUnit unit) { |
| return e.schedule(command, delay, unit); |
| } |
| public <V> ScheduledFuture<V> schedule(Callable<V> callable, long delay, TimeUnit unit) { |
| return e.schedule(callable, delay, unit); |
| } |
| public ScheduledFuture<?> scheduleAtFixedRate(Runnable command, long initialDelay, long period, TimeUnit unit) { |
| return e.scheduleAtFixedRate(command, initialDelay, period, unit); |
| } |
| public ScheduledFuture<?> scheduleWithFixedDelay(Runnable command, long initialDelay, long delay, TimeUnit unit) { |
| return e.scheduleWithFixedDelay(command, initialDelay, delay, unit); |
| } |
| } |
| |
| |
| /** Cannot instantiate. */ |
| private Executors() {} |
| } |
