asyncIncr

原子增（减）操作。incr的异步版本。

public static interface IncrListener extends GenericFutureListener<Future<Long>> {
    /**
     * This function will be called when listened asyncIncr future is done.
     *
     * @param future the listened future
     * @throws Exception throw exception if any error occurs.
     *
     * Notice: User shouldn't do any operations that may block or time-consuming
     */
    @Override
    public void operationComplete(Future<Long> future) throws Exception;
}
/**
 * atomically increment value by key, async version
 *
 * @param hashKey   the hash key to increment.
 * @param sortKey   the sort key to increment.
 * @param increment the increment to be added to the old value.
 * @param timeout   how long will the operation timeout in milliseconds.
 *                  if timeout > 0, it is a timeout value for current op,
 *                  else the timeout value in the configuration file will be used.
 * @return the future for current op
 * <p>
 * Future return:
 * On success: return new value.
 * On failure: a throwable, which is an instance of PException
 * <p>
 * Thread safety:
 * All the listeners for the same table are guaranteed to be dispatched in the same thread, so all the
 * listeners for the same future are guaranteed to be executed as the same order as the listeners added.
 * But listeners for different tables are not guaranteed to be dispatched in the same thread.
 */
public Future<Long> asyncIncr(byte[] hashKey, byte[] sortKey, long increment, int timeout/*ms*/);

注：

• 参数和返回值：参见同步接口incr。