Package org.apache.hadoop.util.concurrent

Interface AsyncGet<R,E extends Throwable>

Type Parameters:
R - The type of the return value.
E - The exception type that the underlying implementation may throw.
public interface AsyncGet<R,E extends Throwable>
This interface defines an asynchronous get(long, TimeUnit) method. When the return value is still being computed, invoking get(long, TimeUnit) will result in a TimeoutException. The method should be invoked again and again until the underlying computation is completed.

  • Nested Class Summary

    Nested Classes
    Modifier and Type
    Interface
    Description
    static class 
    AsyncGet.Util
    Utility

  • Method Summary

    Modifier and Type
    Method
    Description
    R
    get(long timeout, TimeUnit unit)
    Get the result.
    boolean
    isDone()
     

  • Method Details

    • get

      R get(long timeout, TimeUnit unit) throws E, TimeoutException, InterruptedException
      Get the result.
      Parameters:
      timeout - The maximum time period to wait. When timeout == 0, it does not wait at all. When timeout < 0, it waits indefinitely.
      unit - The unit of the timeout value
      Returns:
      the result, which is possibly null.
      Throws:
      E - an exception thrown by the underlying implementation.
      TimeoutException - if it cannot return after the given time period.
      InterruptedException - if the thread is interrupted.

    • isDone

      boolean isDone()
      Returns:
      true if the underlying computation is done; false, otherwise.