V
- The result type of the I/O operationA
- The type of the object attached to the I/O operationpublic interface CompletionHandler<V,A>
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.
void completed(V result, A attachment)
result
- The result of the I/O operation.attachment
- The object attached to the I/O operation when it was initiated.void failed(Throwable exc, A attachment)
exc
- The exception to indicate why the I/O operation failedattachment
- The object attached to the I/O operation when it was initiated.
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