| Methods Summary |
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| public static java.util.concurrent.Callable | callable(java.lang.Runnable task, T result)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
Callable to an otherwise resultless action.
if (task == null)
throw new NullPointerException();
return new RunnableAdapter<T>(task, result);
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| public static java.util.concurrent.Callable | callable(java.lang.Runnable task)Returns a {@link Callable} object that, when
called, runs the given task and returns null.
if (task == null)
throw new NullPointerException();
return new RunnableAdapter<Object>(task, null);
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| public static java.util.concurrent.Callable | callable(java.security.PrivilegedAction action)Returns a {@link Callable} object that, when
called, runs the given privileged action and returns its result.
if (action == null)
throw new NullPointerException();
return new Callable<Object>() {
public Object call() { return action.run(); }};
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| public static java.util.concurrent.Callable | callable(java.security.PrivilegedExceptionAction action)Returns a {@link Callable} object that, when
called, runs the given privileged exception action and returns
its result.
if (action == null)
throw new NullPointerException();
return new Callable<Object>() {
public Object call() throws Exception { return action.run(); }};
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| public static java.util.concurrent.ThreadFactory | defaultThreadFactory()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 defaultThreadFactory method. Each new
thread is created as a non-daemon thread with priority set to
the smaller of Thread.NORM_PRIORITY and the maximum
priority permitted in the thread group. New threads have names
accessible via {@link Thread#getName} of
pool-N-thread-M, where N is the sequence
number of this factory, and M is the sequence number
of the thread created by this factory.
return new DefaultThreadFactory();
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| public static java.util.concurrent.ExecutorService | newCachedThreadPool()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 execute 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 new ThreadPoolExecutor(0, Integer.MAX_VALUE,
60L, TimeUnit.SECONDS,
new SynchronousQueue<Runnable>());
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| public static java.util.concurrent.ExecutorService | newCachedThreadPool(java.util.concurrent.ThreadFactory threadFactory)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.
return new ThreadPoolExecutor(0, Integer.MAX_VALUE,
60L, TimeUnit.SECONDS,
new SynchronousQueue<Runnable>(),
threadFactory);
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| public static java.util.concurrent.ExecutorService | newFixedThreadPool(int nThreads)Creates a thread pool that reuses a fixed number of threads
operating off a shared unbounded queue. At any point, at most
nThreads 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}.
return new ThreadPoolExecutor(nThreads, nThreads,
0L, TimeUnit.MILLISECONDS,
new LinkedBlockingQueue<Runnable>());
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| public static java.util.concurrent.ExecutorService | newFixedThreadPool(int nThreads, java.util.concurrent.ThreadFactory threadFactory)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 nThreads 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}.
return new ThreadPoolExecutor(nThreads, nThreads,
0L, TimeUnit.MILLISECONDS,
new LinkedBlockingQueue<Runnable>(),
threadFactory);
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| public static java.util.concurrent.ScheduledExecutorService | newScheduledThreadPool(int corePoolSize, java.util.concurrent.ThreadFactory threadFactory)Creates a thread pool that can schedule commands to run after a
given delay, or to execute periodically.
return new ScheduledThreadPoolExecutor(corePoolSize, threadFactory);
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| public static java.util.concurrent.ScheduledExecutorService | newScheduledThreadPool(int corePoolSize)Creates a thread pool that can schedule commands to run after a
given delay, or to execute periodically.
return new ScheduledThreadPoolExecutor(corePoolSize);
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| public static java.util.concurrent.ExecutorService | newSingleThreadExecutor()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
newFixedThreadPool(1) the returned executor is
guaranteed not to be reconfigurable to use additional threads.
return new FinalizableDelegatedExecutorService
(new ThreadPoolExecutor(1, 1,
0L, TimeUnit.MILLISECONDS,
new LinkedBlockingQueue<Runnable>()));
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| public static java.util.concurrent.ExecutorService | newSingleThreadExecutor(java.util.concurrent.ThreadFactory threadFactory)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 newFixedThreadPool(1, threadFactory) the
returned executor is guaranteed not to be reconfigurable to use
additional threads.
return new FinalizableDelegatedExecutorService
(new ThreadPoolExecutor(1, 1,
0L, TimeUnit.MILLISECONDS,
new LinkedBlockingQueue<Runnable>(),
threadFactory));
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| public static java.util.concurrent.ScheduledExecutorService | newSingleThreadScheduledExecutor()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
newScheduledThreadPool(1) the returned executor is
guaranteed not to be reconfigurable to use additional threads.
return new DelegatedScheduledExecutorService
(new ScheduledThreadPoolExecutor(1));
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| public static java.util.concurrent.ScheduledExecutorService | newSingleThreadScheduledExecutor(java.util.concurrent.ThreadFactory 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 newScheduledThreadPool(1, threadFactory)
the returned executor is guaranteed not to be reconfigurable to
use additional threads.
return new DelegatedScheduledExecutorService
(new ScheduledThreadPoolExecutor(1, threadFactory));
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| public static java.util.concurrent.Callable | privilegedCallable(java.util.concurrent.Callable callable)Returns a {@link Callable} object that will, when
called, execute the given callable 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}.
if (callable == null)
throw new NullPointerException();
return new PrivilegedCallable<T>(callable);
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| public static java.util.concurrent.Callable | privilegedCallableUsingCurrentClassLoader(java.util.concurrent.Callable callable)Returns a {@link Callable} object that will, when
called, execute the given callable 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}.
if (callable == null)
throw new NullPointerException();
return new PrivilegedCallableUsingCurrentClassLoader<T>(callable);
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| public static java.util.concurrent.ThreadFactory | privilegedThreadFactory()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
privilegedThreadFactory method. A new
privilegedThreadFactory 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.
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 new PrivilegedThreadFactory();
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| public static java.util.concurrent.ExecutorService | unconfigurableExecutorService(java.util.concurrent.ExecutorService executor)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.
if (executor == null)
throw new NullPointerException();
return new DelegatedExecutorService(executor);
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| public static java.util.concurrent.ScheduledExecutorService | unconfigurableScheduledExecutorService(java.util.concurrent.ScheduledExecutorService 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.
if (executor == null)
throw new NullPointerException();
return new DelegatedScheduledExecutorService(executor);
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