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java.nio.channels

Interface CompletionHandler<V,A>

Contents
  • Type Parameters:
    V - The result type of the I/O operation
    A - The type of the object attached to the I/O operation

    public interface CompletionHandler<V,A>
    A handler for consuming the result of an asynchronous I/O operation.

    The asynchronous channels defined in this package allow a completion handler to be specified to consume the result of an asynchronous operation. The completed method is invoked when the I/O operation completes successfully. The failed method is invoked if the I/O operations fails. The implementations of these methods should complete in a timely manner so as to avoid keeping the invoking thread from dispatching to other completion handlers.

    Since:
    1.7

    • Method Detail

      • completed

        void completed(V result,
             A attachment)
        Invoked when an operation has completed.
        Parameters:
        result - The result of the I/O operation.
        attachment - The object attached to the I/O operation when it was initiated.

      • failed

        void failed(Throwable exc,
          A attachment)
        Invoked when an operation fails.
        Parameters:
        exc - The exception to indicate why the I/O operation failed
        attachment - The object attached to the I/O operation when it was initiated.
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