Constructor Detail

• AbstractCheckedFuture

  protected AbstractCheckedFuture(ListenableFuture<V> delegate)

  Constructs an AbstractCheckedFuture that wraps a delegate.

Method Detail

• mapException

  protected abstract X mapException(Exception e)

  Translates from an InterruptedException, CancellationException or ExecutionException thrown by get to an exception of type X to be thrown by checkedGet. Subclasses must implement this method.

  If e is an InterruptedException, the calling checkedGet method has already restored the interrupt after catching the exception. If an implementation of mapException(Exception) wishes to swallow the interrupt, it can do so by calling Thread.interrupted().

  Subclasses may choose to throw, rather than return, a subclass of RuntimeException to allow creating a CheckedFuture that throws both checked and unchecked exceptions.

• checkedGet

  public V checkedGet()
               throws X extends Exception

  Exception checking version of Future.get() that will translate InterruptedException, CancellationException and ExecutionException into application-specific exceptions.

  This implementation calls ForwardingFuture.get() and maps that method's standard exceptions to instances of type X using mapException(java.lang.Exception).

  In addition, if get throws an InterruptedException, this implementation will set the current thread's interrupt status before calling mapException.

  Specified by:

  checkedGet in interface  CheckedFuture<V,X extends Exception>

  Returns:

  the result of executing the future.

  Throws:

  X - if ForwardingFuture.get() throws an InterruptedException, CancellationException, or ExecutionException

  X extends Exception

• checkedGet

  public V checkedGet(long timeout,
                      TimeUnit unit)
               throws TimeoutException,
                      X extends Exception

  Exception checking version of Future.get(long, TimeUnit) that will translate InterruptedException, CancellationException and ExecutionException into application-specific exceptions. On timeout this method throws a normal TimeoutException.

  This implementation calls ForwardingFuture.get(long, TimeUnit) and maps that method's standard exceptions (excluding TimeoutException, which is propagated) to instances of type X using mapException(java.lang.Exception).

  In addition, if get throws an InterruptedException, this implementation will set the current thread's interrupt status before calling mapException.

  Specified by:

  checkedGet in interface  CheckedFuture<V,X extends Exception>

  Returns:

  the result of executing the future.

  Throws:

  X - if ForwardingFuture.get() throws an InterruptedException, CancellationException, or ExecutionException

  TimeoutException - if retrieving the result timed out.

  X extends Exception