- A Semaphore controls access to shared resources. A semaphore maintains a counter to specify number of resources that the semaphore controls.
- CountDownLatch allows one or more threads to wait for a countdown to complete.
- The Exchanger class is meant for exchanging data between two threads. This class is useful when two threads need to synchronize between each other and continuously exchange data.
- CyclicBarrier helps provide a synchronization point where threads may need to wait at a predefined execution point until all other threads reach that point.
- Phaser is a useful feature when few independent threads have to work in phases to complete a task.
Executor Frame Work:
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