java.util.concurrent
Class Executors

java.lang.Object sample code for java.lang.Object definition code for java.lang.Object 
  extended by java.util.concurrent.Executors

public class Executors
extends Object sample code for java.lang.Object definition code for java.lang.Object

Factory and utility methods for Executor sample code for java.util.concurrent.Executor definition code for java.util.concurrent.Executor , ExecutorService sample code for java.util.concurrent.ExecutorService definition code for java.util.concurrent.ExecutorService , ScheduledExecutorService sample code for java.util.concurrent.ScheduledExecutorService definition code for java.util.concurrent.ScheduledExecutorService , ThreadFactory sample code for java.util.concurrent.ThreadFactory definition code for java.util.concurrent.ThreadFactory , and Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable classes defined in this package. This class supports the following kinds of methods:

Since:
1.5

Method Summary
static Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable <Object sample code for java.lang.Object definition code for java.lang.Object > callable sample code for java.util.concurrent.Executors.callable(java.security.PrivilegedAction) definition code for java.util.concurrent.Executors.callable(java.security.PrivilegedAction) (PrivilegedAction sample code for java.security.PrivilegedAction definition code for java.security.PrivilegedAction  action)
          Returns a Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable object that, when called, runs the given privileged action and returns its result.
static Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable <Object sample code for java.lang.Object definition code for java.lang.Object > callable sample code for java.util.concurrent.Executors.callable(java.security.PrivilegedExceptionAction) definition code for java.util.concurrent.Executors.callable(java.security.PrivilegedExceptionAction) (PrivilegedExceptionAction sample code for java.security.PrivilegedExceptionAction definition code for java.security.PrivilegedExceptionAction  action)
          Returns a Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable object that, when called, runs the given privileged exception action and returns its result.
static Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable <Object sample code for java.lang.Object definition code for java.lang.Object > callable sample code for java.util.concurrent.Executors.callable(java.lang.Runnable) definition code for java.util.concurrent.Executors.callable(java.lang.Runnable) (Runnable sample code for java.lang.Runnable definition code for java.lang.Runnable  task)
          Returns a Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable object that, when called, runs the given task and returns null.
static
<T> Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable <T>
callable sample code for java.util.concurrent.Executors.callable(java.lang.Runnable, T) definition code for java.util.concurrent.Executors.callable(java.lang.Runnable, T) (Runnable sample code for java.lang.Runnable definition code for java.lang.Runnable  task, T result)
          Returns a Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable object that, when called, runs the given task and returns the given result.
static ThreadFactory sample code for java.util.concurrent.ThreadFactory definition code for java.util.concurrent.ThreadFactory defaultThreadFactory sample code for java.util.concurrent.Executors.defaultThreadFactory() definition code for java.util.concurrent.Executors.defaultThreadFactory() ()
          Returns a default thread factory used to create new threads.
static ExecutorService sample code for java.util.concurrent.ExecutorService definition code for java.util.concurrent.ExecutorService newCachedThreadPool sample code for java.util.concurrent.Executors.newCachedThreadPool() definition code for java.util.concurrent.Executors.newCachedThreadPool() ()
          Creates a thread pool that creates new threads as needed, but will reuse previously constructed threads when they are available.
static ExecutorService sample code for java.util.concurrent.ExecutorService definition code for java.util.concurrent.ExecutorService newCachedThreadPool sample code for java.util.concurrent.Executors.newCachedThreadPool(java.util.concurrent.ThreadFactory) definition code for java.util.concurrent.Executors.newCachedThreadPool(java.util.concurrent.ThreadFactory) (ThreadFactory sample code for java.util.concurrent.ThreadFactory definition code for 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.
static ExecutorService sample code for java.util.concurrent.ExecutorService definition code for java.util.concurrent.ExecutorService newFixedThreadPool sample code for java.util.concurrent.Executors.newFixedThreadPool(int) definition code for java.util.concurrent.Executors.newFixedThreadPool(int) (int nThreads)
          Creates a thread pool that reuses a fixed set of threads operating off a shared unbounded queue.
static ExecutorService sample code for java.util.concurrent.ExecutorService definition code for java.util.concurrent.ExecutorService newFixedThreadPool sample code for java.util.concurrent.Executors.newFixedThreadPool(int, java.util.concurrent.ThreadFactory) definition code for java.util.concurrent.Executors.newFixedThreadPool(int, java.util.concurrent.ThreadFactory) (int nThreads, ThreadFactory sample code for java.util.concurrent.ThreadFactory definition code for java.util.concurrent.ThreadFactory  threadFactory)
          Creates a thread pool that reuses a fixed set of threads operating off a shared unbounded queue, using the provided ThreadFactory to create new threads when needed.
static ScheduledExecutorService sample code for java.util.concurrent.ScheduledExecutorService definition code for java.util.concurrent.ScheduledExecutorService newScheduledThreadPool sample code for java.util.concurrent.Executors.newScheduledThreadPool(int) definition code for java.util.concurrent.Executors.newScheduledThreadPool(int) (int corePoolSize)
          Creates a thread pool that can schedule commands to run after a given delay, or to execute periodically.
static ScheduledExecutorService sample code for java.util.concurrent.ScheduledExecutorService definition code for java.util.concurrent.ScheduledExecutorService newScheduledThreadPool sample code for java.util.concurrent.Executors.newScheduledThreadPool(int, java.util.concurrent.ThreadFactory) definition code for java.util.concurrent.Executors.newScheduledThreadPool(int, java.util.concurrent.ThreadFactory) (int corePoolSize, ThreadFactory sample code for java.util.concurrent.ThreadFactory definition code for java.util.concurrent.ThreadFactory  threadFactory)
          Creates a thread pool that can schedule commands to run after a given delay, or to execute periodically.
static ExecutorService sample code for java.util.concurrent.ExecutorService definition code for java.util.concurrent.ExecutorService newSingleThreadExecutor sample code for java.util.concurrent.Executors.newSingleThreadExecutor() definition code for java.util.concurrent.Executors.newSingleThreadExecutor() ()
          Creates an Executor that uses a single worker thread operating off an unbounded queue.
static ExecutorService sample code for java.util.concurrent.ExecutorService definition code for java.util.concurrent.ExecutorService newSingleThreadExecutor sample code for java.util.concurrent.Executors.newSingleThreadExecutor(java.util.concurrent.ThreadFactory) definition code for java.util.concurrent.Executors.newSingleThreadExecutor(java.util.concurrent.ThreadFactory) (ThreadFactory sample code for java.util.concurrent.ThreadFactory definition code for 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.
static ScheduledExecutorService sample code for java.util.concurrent.ScheduledExecutorService definition code for java.util.concurrent.ScheduledExecutorService newSingleThreadScheduledExecutor sample code for java.util.concurrent.Executors.newSingleThreadScheduledExecutor() definition code for java.util.concurrent.Executors.newSingleThreadScheduledExecutor() ()
          Creates a single-threaded executor that can schedule commands to run after a given delay, or to execute periodically.
static ScheduledExecutorService sample code for java.util.concurrent.ScheduledExecutorService definition code for java.util.concurrent.ScheduledExecutorService newSingleThreadScheduledExecutor sample code for java.util.concurrent.Executors.newSingleThreadScheduledExecutor(java.util.concurrent.ThreadFactory) definition code for java.util.concurrent.Executors.newSingleThreadScheduledExecutor(java.util.concurrent.ThreadFactory) (ThreadFactory sample code for java.util.concurrent.ThreadFactory definition code for java.util.concurrent.ThreadFactory  threadFactory)
          Creates a single-threaded executor that can schedule commands to run after a given delay, or to execute periodically.
static
<T> Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable <T>
privilegedCallable sample code for java.util.concurrent.Executors.privilegedCallable(java.util.concurrent.Callable) definition code for java.util.concurrent.Executors.privilegedCallable(java.util.concurrent.Callable) (Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable <T> callable)
          Returns a Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable object that will, when called, execute the given callable under the current access control context.
static
<T> Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable <T>
privilegedCallableUsingCurrentClassLoader sample code for java.util.concurrent.Executors.privilegedCallableUsingCurrentClassLoader(java.util.concurrent.Callable) definition code for java.util.concurrent.Executors.privilegedCallableUsingCurrentClassLoader(java.util.concurrent.Callable) (Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable <T> callable)
          Returns a Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.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.
static ThreadFactory sample code for java.util.concurrent.ThreadFactory definition code for java.util.concurrent.ThreadFactory privilegedThreadFactory sample code for java.util.concurrent.Executors.privilegedThreadFactory() definition code for java.util.concurrent.Executors.privilegedThreadFactory() ()
          Returns a thread factory used to create new threads that have the same permissions as the current thread.
static ExecutorService sample code for java.util.concurrent.ExecutorService definition code for java.util.concurrent.ExecutorService unconfigurableExecutorService sample code for java.util.concurrent.Executors.unconfigurableExecutorService(java.util.concurrent.ExecutorService) definition code for java.util.concurrent.Executors.unconfigurableExecutorService(java.util.concurrent.ExecutorService) (ExecutorService sample code for java.util.concurrent.ExecutorService definition code for java.util.concurrent.ExecutorService  executor)
          Returns an object that delegates all defined ExecutorService sample code for java.util.concurrent.ExecutorService definition code for java.util.concurrent.ExecutorService methods to the given executor, but not any other methods that might otherwise be accessible using casts.
static ScheduledExecutorService sample code for java.util.concurrent.ScheduledExecutorService definition code for java.util.concurrent.ScheduledExecutorService unconfigurableScheduledExecutorService sample code for java.util.concurrent.Executors.unconfigurableScheduledExecutorService(java.util.concurrent.ScheduledExecutorService) definition code for java.util.concurrent.Executors.unconfigurableScheduledExecutorService(java.util.concurrent.ScheduledExecutorService) (ScheduledExecutorService sample code for java.util.concurrent.ScheduledExecutorService definition code for java.util.concurrent.ScheduledExecutorService  executor)
          Returns an object that delegates all defined ScheduledExecutorService sample code for java.util.concurrent.ScheduledExecutorService definition code for java.util.concurrent.ScheduledExecutorService methods to the given executor, but not any other methods that might otherwise be accessible using casts.
 
Methods inherited from class java.lang.Object sample code for java.lang.Object definition code for java.lang.Object
clone sample code for java.lang.Object.clone() definition code for java.lang.Object.clone() , equals sample code for java.lang.Object.equals(java.lang.Object) definition code for java.lang.Object.equals(java.lang.Object) , finalize sample code for java.lang.Object.finalize() definition code for java.lang.Object.finalize() , getClass sample code for java.lang.Object.getClass() definition code for java.lang.Object.getClass() , hashCode sample code for java.lang.Object.hashCode() definition code for java.lang.Object.hashCode() , notify sample code for java.lang.Object.notify() definition code for java.lang.Object.notify() , notifyAll sample code for java.lang.Object.notifyAll() definition code for java.lang.Object.notifyAll() , toString sample code for java.lang.Object.toString() definition code for java.lang.Object.toString() , wait sample code for java.lang.Object.wait() definition code for java.lang.Object.wait() , wait sample code for java.lang.Object.wait(long) definition code for java.lang.Object.wait(long) , wait sample code for java.lang.Object.wait(long, int) definition code for java.lang.Object.wait(long, int)
 

Method Detail

newFixedThreadPool sample code for java.util.concurrent.Executors.newFixedThreadPool(int) definition code for java.util.concurrent.Executors.newFixedThreadPool(int)

public static ExecutorService sample code for java.util.concurrent.ExecutorService definition code for java.util.concurrent.ExecutorService  newFixedThreadPool(int nThreads)
Creates a thread pool that reuses a fixed set of threads operating off a shared unbounded queue. 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.

Parameters:
nThreads - the number of threads in the pool
Returns:
the newly created thread pool

newFixedThreadPool sample code for java.util.concurrent.Executors.newFixedThreadPool(int, java.util.concurrent.ThreadFactory) definition code for java.util.concurrent.Executors.newFixedThreadPool(int, java.util.concurrent.ThreadFactory)

public static ExecutorService sample code for java.util.concurrent.ExecutorService definition code for java.util.concurrent.ExecutorService  newFixedThreadPool(int nThreads,
                                                 ThreadFactory sample code for java.util.concurrent.ThreadFactory definition code for java.util.concurrent.ThreadFactory  threadFactory)
Creates a thread pool that reuses a fixed set of threads operating off a shared unbounded queue, using the provided ThreadFactory to create new threads when needed.

Parameters:
nThreads - the number of threads in the pool
threadFactory - the factory to use when creating new threads
Returns:
the newly created thread pool

newSingleThreadExecutor sample code for java.util.concurrent.Executors.newSingleThreadExecutor() definition code for java.util.concurrent.Executors.newSingleThreadExecutor()

public static ExecutorService sample code for java.util.concurrent.ExecutorService definition code for 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.

Returns:
the newly created single-threaded Executor

newSingleThreadExecutor sample code for java.util.concurrent.Executors.newSingleThreadExecutor(java.util.concurrent.ThreadFactory) definition code for java.util.concurrent.Executors.newSingleThreadExecutor(java.util.concurrent.ThreadFactory)

public static ExecutorService sample code for java.util.concurrent.ExecutorService definition code for java.util.concurrent.ExecutorService  newSingleThreadExecutor(ThreadFactory sample code for java.util.concurrent.ThreadFactory definition code for 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.

Parameters:
threadFactory - the factory to use when creating new threads
Returns:
the newly created single-threaded Executor

newCachedThreadPool sample code for java.util.concurrent.Executors.newCachedThreadPool() definition code for java.util.concurrent.Executors.newCachedThreadPool()

public static ExecutorService sample code for java.util.concurrent.ExecutorService definition code for 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 ThreadPoolExecutor sample code for java.util.concurrent.ThreadPoolExecutor definition code for java.util.concurrent.ThreadPoolExecutor constructors.

Returns:
the newly created thread pool

newCachedThreadPool sample code for java.util.concurrent.Executors.newCachedThreadPool(java.util.concurrent.ThreadFactory) definition code for java.util.concurrent.Executors.newCachedThreadPool(java.util.concurrent.ThreadFactory)

public static ExecutorService sample code for java.util.concurrent.ExecutorService definition code for java.util.concurrent.ExecutorService  newCachedThreadPool(ThreadFactory sample code for java.util.concurrent.ThreadFactory definition code for 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.

Parameters:
threadFactory - the factory to use when creating new threads
Returns:
the newly created thread pool

newSingleThreadScheduledExecutor sample code for java.util.concurrent.Executors.newSingleThreadScheduledExecutor() definition code for java.util.concurrent.Executors.newSingleThreadScheduledExecutor()

public static ScheduledExecutorService sample code for java.util.concurrent.ScheduledExecutorService definition code for 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.

Returns:
the newly created scheduled executor

newSingleThreadScheduledExecutor sample code for java.util.concurrent.Executors.newSingleThreadScheduledExecutor(java.util.concurrent.ThreadFactory) definition code for java.util.concurrent.Executors.newSingleThreadScheduledExecutor(java.util.concurrent.ThreadFactory)

public static ScheduledExecutorService sample code for java.util.concurrent.ScheduledExecutorService definition code for java.util.concurrent.ScheduledExecutorService  newSingleThreadScheduledExecutor(ThreadFactory sample code for java.util.concurrent.ThreadFactory definition code for 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.

Parameters:
threadFactory - the factory to use when creating new threads
Returns:
a newly created scheduled executor

newScheduledThreadPool sample code for java.util.concurrent.Executors.newScheduledThreadPool(int) definition code for java.util.concurrent.Executors.newScheduledThreadPool(int)

public static ScheduledExecutorService sample code for java.util.concurrent.ScheduledExecutorService definition code for 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.

Parameters:
corePoolSize - the number of threads to keep in the pool, even if they are idle.
Returns:
a newly created scheduled thread pool

newScheduledThreadPool sample code for java.util.concurrent.Executors.newScheduledThreadPool(int, java.util.concurrent.ThreadFactory) definition code for java.util.concurrent.Executors.newScheduledThreadPool(int, java.util.concurrent.ThreadFactory)

public static ScheduledExecutorService sample code for java.util.concurrent.ScheduledExecutorService definition code for java.util.concurrent.ScheduledExecutorService  newScheduledThreadPool(int corePoolSize,
                                                              ThreadFactory sample code for java.util.concurrent.ThreadFactory definition code for java.util.concurrent.ThreadFactory  threadFactory)
Creates a thread pool that can schedule commands to run after a given delay, or to execute periodically.

Parameters:
corePoolSize - the number of threads to keep in the pool, even if they are idle.
threadFactory - the factory to use when the executor creates a new thread.
Returns:
a newly created scheduled thread pool

unconfigurableExecutorService sample code for java.util.concurrent.Executors.unconfigurableExecutorService(java.util.concurrent.ExecutorService) definition code for java.util.concurrent.Executors.unconfigurableExecutorService(java.util.concurrent.ExecutorService)

public static ExecutorService sample code for java.util.concurrent.ExecutorService definition code for java.util.concurrent.ExecutorService  unconfigurableExecutorService(ExecutorService sample code for java.util.concurrent.ExecutorService definition code for java.util.concurrent.ExecutorService  executor)
Returns an object that delegates all defined ExecutorService sample code for java.util.concurrent.ExecutorService definition code for java.util.concurrent.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.

Parameters:
executor - the underlying implementation
Returns:
an ExecutorService instance
Throws:
NullPointerException sample code for java.lang.NullPointerException definition code for java.lang.NullPointerException - if executor null

unconfigurableScheduledExecutorService sample code for java.util.concurrent.Executors.unconfigurableScheduledExecutorService(java.util.concurrent.ScheduledExecutorService) definition code for java.util.concurrent.Executors.unconfigurableScheduledExecutorService(java.util.concurrent.ScheduledExecutorService)

public static ScheduledExecutorService sample code for java.util.concurrent.ScheduledExecutorService definition code for java.util.concurrent.ScheduledExecutorService  unconfigurableScheduledExecutorService(ScheduledExecutorService sample code for java.util.concurrent.ScheduledExecutorService definition code for java.util.concurrent.ScheduledExecutorService  executor)
Returns an object that delegates all defined ScheduledExecutorService sample code for java.util.concurrent.ScheduledExecutorService definition code for java.util.concurrent.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.

Parameters:
executor - the underlying implementation
Returns:
a ScheduledExecutorService instance
Throws:
NullPointerException sample code for java.lang.NullPointerException definition code for java.lang.NullPointerException - if executor null

defaultThreadFactory sample code for java.util.concurrent.Executors.defaultThreadFactory() definition code for java.util.concurrent.Executors.defaultThreadFactory()

public static ThreadFactory sample code for java.util.concurrent.ThreadFactory definition code for 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 ThreadGroup sample code for java.lang.ThreadGroup definition code for java.lang.ThreadGroup . If there is a SecurityManager sample code for java.lang.SecurityManager definition code for java.lang.SecurityManager , it uses the group of System.getSecurityManager() sample code for java.lang.System.getSecurityManager() definition code for java.lang.System.getSecurityManager() , else the group of the thread invoking this defaultThreadFactory method. Each new thread is created as a non-daemon thread with priority Thread.NORM_PRIORITY. New threads have names accessible via Thread.getName() sample code for java.lang.Thread.getName() definition code for java.lang.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.

Returns:
a thread factory

privilegedThreadFactory sample code for java.util.concurrent.Executors.privilegedThreadFactory() definition code for java.util.concurrent.Executors.privilegedThreadFactory()

public static ThreadFactory sample code for java.util.concurrent.ThreadFactory definition code for 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 defaultThreadFactory() sample code for java.util.concurrent.Executors.defaultThreadFactory() definition code for java.util.concurrent.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 AccessController.doPrivileged(java.security.PrivilegedAction) sample code for java.security.AccessController.doPrivileged(java.security.PrivilegedAction) definition code for java.security.AccessController.doPrivileged(java.security.PrivilegedAction) 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 ThreadLocal sample code for java.lang.ThreadLocal definition code for java.lang.ThreadLocal or InheritableThreadLocal sample code for java.lang.InheritableThreadLocal definition code for java.lang.InheritableThreadLocal values. If necessary, particular values of thread locals can be set or reset before any task runs in ThreadPoolExecutor sample code for java.util.concurrent.ThreadPoolExecutor definition code for java.util.concurrent.ThreadPoolExecutor subclasses using ThreadPoolExecutor.beforeExecute(java.lang.Thread, java.lang.Runnable) sample code for java.util.concurrent.ThreadPoolExecutor.beforeExecute(java.lang.Thread, java.lang.Runnable) definition code for java.util.concurrent.ThreadPoolExecutor.beforeExecute(java.lang.Thread, java.lang.Runnable) . 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.

Returns:
a thread factory
Throws:
AccessControlException sample code for java.security.AccessControlException definition code for java.security.AccessControlException - if the current access control context does not have permission to both get and set context class loader.

callable sample code for java.util.concurrent.Executors.<T>callable(java.lang.Runnable, T) definition code for java.util.concurrent.Executors.<T>callable(java.lang.Runnable, T)

public static <T> Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable <T> callable(Runnable sample code for java.lang.Runnable definition code for java.lang.Runnable  task,
                                       T result)
Returns a Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.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.

Parameters:
task - the task to run
result - the result to return
Returns:
a callable object
Throws:
NullPointerException sample code for java.lang.NullPointerException definition code for java.lang.NullPointerException - if task null

callable sample code for java.util.concurrent.Executors.callable(java.lang.Runnable) definition code for java.util.concurrent.Executors.callable(java.lang.Runnable)

public static Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable <Object sample code for java.lang.Object definition code for java.lang.Object > callable(Runnable sample code for java.lang.Runnable definition code for java.lang.Runnable  task)
Returns a Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable object that, when called, runs the given task and returns null.

Parameters:
task - the task to run
Returns:
a callable object
Throws:
NullPointerException sample code for java.lang.NullPointerException definition code for java.lang.NullPointerException - if task null

callable sample code for java.util.concurrent.Executors.callable(java.security.PrivilegedAction) definition code for java.util.concurrent.Executors.callable(java.security.PrivilegedAction)

public static Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable <Object sample code for java.lang.Object definition code for java.lang.Object > callable(PrivilegedAction sample code for java.security.PrivilegedAction definition code for java.security.PrivilegedAction  action)
Returns a Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable object that, when called, runs the given privileged action and returns its result.

Parameters:
action - the privileged action to run
Returns:
a callable object
Throws:
NullPointerException sample code for java.lang.NullPointerException definition code for java.lang.NullPointerException - if action null

callable sample code for java.util.concurrent.Executors.callable(java.security.PrivilegedExceptionAction) definition code for java.util.concurrent.Executors.callable(java.security.PrivilegedExceptionAction)

public static Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable <Object sample code for java.lang.Object definition code for java.lang.Object > callable(PrivilegedExceptionAction sample code for java.security.PrivilegedExceptionAction definition code for java.security.PrivilegedExceptionAction  action)
Returns a Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable object that, when called, runs the given privileged exception action and returns its result.

Parameters:
action - the privileged exception action to run
Returns:
a callable object
Throws:
NullPointerException sample code for java.lang.NullPointerException definition code for java.lang.NullPointerException - if action null

privilegedCallable sample code for java.util.concurrent.Executors.<T>privilegedCallable(java.util.concurrent.Callable<T>) definition code for java.util.concurrent.Executors.<T>privilegedCallable(java.util.concurrent.Callable<T>)

public static <T> Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable <T> privilegedCallable(Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable <T> callable)
Returns a Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable object that will, when called, execute the given callable under the current access control context. This method should normally be invoked within an AccessController.doPrivileged(java.security.PrivilegedAction) sample code for java.security.AccessController.doPrivileged(java.security.PrivilegedAction) definition code for java.security.AccessController.doPrivileged(java.security.PrivilegedAction) 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 AccessControlException sample code for java.security.AccessControlException definition code for java.security.AccessControlException .

Parameters:
callable - the underlying task
Returns:
a callable object
Throws:
NullPointerException sample code for java.lang.NullPointerException definition code for java.lang.NullPointerException - if callable null

privilegedCallableUsingCurrentClassLoader sample code for java.util.concurrent.Executors.<T>privilegedCallableUsingCurrentClassLoader(java.util.concurrent.Callable<T>) definition code for java.util.concurrent.Executors.<T>privilegedCallableUsingCurrentClassLoader(java.util.concurrent.Callable<T>)

public static <T> Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable <T> privilegedCallableUsingCurrentClassLoader(Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.Callable <T> callable)
Returns a Callable sample code for java.util.concurrent.Callable definition code for java.util.concurrent.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 AccessController.doPrivileged(java.security.PrivilegedAction) sample code for java.security.AccessController.doPrivileged(java.security.PrivilegedAction) definition code for java.security.AccessController.doPrivileged(java.security.PrivilegedAction) 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 AccessControlException sample code for java.security.AccessControlException definition code for java.security.AccessControlException .

Parameters:
callable - the underlying task
Returns:
a callable object
Throws:
NullPointerException sample code for java.lang.NullPointerException definition code for java.lang.NullPointerException - if callable null
AccessControlException sample code for java.security.AccessControlException definition code for java.security.AccessControlException - if the current access control context does not have permission to both set and get context class loader.