Utility classes commonly useful in concurrent programming.
BlockingDeque<E> | A Deque that additionally supports blocking operations that wait
for the deque to become non-empty when retrieving an element, and wait for
space to become available in the deque when storing an element. |
BlockingQueue<E> | A Queue that additionally supports operations
that wait for the queue to become non-empty when retrieving an
element, and wait for space to become available in the queue when
storing an element. |
Callable<V> | A task that returns a result and may throw an exception. |
CompletionService<V> | A service that decouples the production of new asynchronous tasks from the consumption of the results of completed tasks. |
ConcurrentMap<K, V> | A Map providing additional atomic
putIfAbsent, remove, and replace methods. |
ConcurrentNavigableMap<K, V> | A ConcurrentMap supporting NavigableMap operations,
and recursively so for its navigable sub-maps. |
Delayed | A mix-in style interface for marking objects that should be acted upon after a given delay. |
Executor | An object that executes submitted Runnable tasks. |
ExecutorService | An Executor that provides methods to manage termination and
methods that can produce a Future for tracking progress of
one or more asynchronous tasks. |
Future<V> | A Future represents the result of an asynchronous computation. |
RejectedExecutionHandler | A handler for tasks that cannot be executed by a ThreadPoolExecutor . |
RunnableFuture<V> | A Future that is Runnable . |
RunnableScheduledFuture<V> | A ScheduledFuture that is Runnable . |
ScheduledExecutorService | An ExecutorService that can schedule commands to run after a given
delay, or to execute periodically. |
ScheduledFuture<V> | A delayed result-bearing action that can be cancelled. |
ThreadFactory | An object that creates new threads on demand. |
AbstractExecutorService | Provides default implementations of ExecutorService
execution methods. |
ArrayBlockingQueue<E> | A bounded blocking queue backed by an
array. |
ConcurrentHashMap<K, V> | A hash table supporting full concurrency of retrievals and adjustable expected concurrency for updates. |
ConcurrentLinkedQueue<E> | An unbounded thread-safe queue based on linked nodes. |
ConcurrentSkipListMap<K, V> | A scalable concurrent ConcurrentNavigableMap implementation. |
ConcurrentSkipListSet<E> | A scalable concurrent NavigableSet implementation based on
a ConcurrentSkipListMap . |
CopyOnWriteArrayList<E> | Implements a ArrayList variant that is thread-safe. |
CopyOnWriteArraySet<E> | A Set that uses an internal CopyOnWriteArrayList
for all of its operations. |
CountDownLatch | A synchronization aid that allows one or more threads to wait until a set of operations being performed in other threads completes. |
CyclicBarrier | A synchronization aid that allows a set of threads to all wait for each other to reach a common barrier point. |
DelayQueue<E extends Delayed> | An unbounded blocking queue of
Delayed elements, in which an element can only be taken
when its delay has expired. |
Exchanger<V> | A synchronization point at which threads can pair and swap elements within pairs. |
ExecutorCompletionService<V> | A CompletionService that uses a supplied Executor
to execute tasks. |
Executors | Factory and utility methods for Executor , ExecutorService , ScheduledExecutorService , ThreadFactory , and Callable classes defined in this
package. |
FutureTask<V> | A cancellable asynchronous computation. |
LinkedBlockingDeque<E> | An optionally-bounded blocking deque based on
linked nodes. |
LinkedBlockingQueue<E> | An optionally-bounded blocking queue based on
linked nodes. |
PriorityBlockingQueue<E> | An unbounded blocking queue that uses
the same ordering rules as class PriorityQueue and supplies
blocking retrieval operations. |
ScheduledThreadPoolExecutor | A ThreadPoolExecutor that can additionally schedule
commands to run after a given delay, or to execute
periodically. |
Semaphore | A counting semaphore. |
SynchronousQueue<E> | A blocking queue in which each insert
operation must wait for a corresponding remove operation by another
thread, and vice versa. |
ThreadPoolExecutor | An ExecutorService that executes each submitted task using
one of possibly several pooled threads, normally configured
using Executors factory methods. |
ThreadPoolExecutor.AbortPolicy | A handler for rejected tasks that throws a
RejectedExecutionException . |
ThreadPoolExecutor.CallerRunsPolicy | A handler for rejected tasks that runs the rejected task
directly in the calling thread of the execute method,
unless the executor has been shut down, in which case the task
is discarded. |
ThreadPoolExecutor.DiscardOldestPolicy | A handler for rejected tasks that discards the oldest unhandled
request and then retries execute , unless the executor
is shut down, in which case the task is discarded. |
ThreadPoolExecutor.DiscardPolicy | A handler for rejected tasks that silently discards the rejected task. |
TimeUnit | A TimeUnit represents time durations at a given unit of granularity and provides utility methods to convert across units, and to perform timing and delay operations in these units. |
BrokenBarrierException | Exception thrown when a thread tries to wait upon a barrier that is in a broken state, or which enters the broken state while the thread is waiting. |
CancellationException | Exception indicating that the result of a value-producing task,
such as a FutureTask , cannot be retrieved because the task
was cancelled. |
ExecutionException | Exception thrown when attempting to retrieve the result of a task that aborted by throwing an exception. |
RejectedExecutionException | Exception thrown by an Executor when a task cannot be
accepted for execution. |
TimeoutException | Exception thrown when a blocking operation times out. |