Package org.openiam.esb.util

Class ResettableCountDownLatch

  • public class ResettableCountDownLatch
extends Object
    Author:
    zaporozhec thanks for https://stackoverflow.com/questions/6595835/resettable-countdownlatch

    • Constructor Detail

      • ResettableCountDownLatch

        public ResettableCountDownLatch​(int count)
                         throws IllegalArgumentException
        Constructs a CountDownLatch initialized with the given count.
        Parameters:
        count - the number of times countDown() must be invoked before threads can pass through await()
        Throws:
        IllegalArgumentException - if count is negative

    • Method Detail

      • await

        public void await()
           throws InterruptedException
        Causes the current thread to wait until the latch has counted down to zero, unless the thread is interrupted.

        If the current count is zero then this method returns immediately.

        If the current count is greater than zero then the current thread becomes disabled for thread scheduling purposes and lies dormant until one of two things happen:

        • The count reaches zero due to invocations of the countDown() method; or
        • Some other thread interrupts the current thread.

        If the current thread:

        • has its interrupted status set on entry to this method; or
        • is interrupted while waiting,
        then InterruptedException is thrown and the current thread's interrupted status is cleared.
        Throws:
        InterruptedException - if the current thread is interrupted while waiting

      • reset

        public void reset()

      • countDown

        public void countDown()
        Decrements the count of the latch, releasing all waiting threads if the count reaches zero.

        If the current count is greater than zero then it is decremented. If the new count is zero then all waiting threads are re-enabled for thread scheduling purposes.

        If the current count equals zero then nothing happens.

      • getCount

        public long getCount()
        Returns the current count.

        This method is typically used for debugging and testing purposes.

        Returns:
        the current count

      • toString

        public String toString()
        Returns a string identifying this latch, as well as its state. The state, in brackets, includes the String "Count =" followed by the current count.
        Overrides:
        toString in class Object
        Returns:
        a string identifying this latch, as well as its state