Hi,
I’m going to test async IO of scala version. As we can see in
https://ci.apache.org/projects/flink/flink-docs-release-1.2/dev/stream/asyncio.html.
The java version of async IO API has method of open and close, in which I can
do some init and clean work. The scala api, however, has neither open nor
close. Even if I can do init work while construct the class, the clean work
can’t be done for there’s no close method.
When I look into the RichAsyncFunction which the java api extends
from, I find it’s the subclass of AbstractRichFunction which provide open and
close method. I try to make my Async IO Function extends both
AbstractRichFunction and AsyncFunction but find out that the open method does
not called by flink so It won’t work.
I managed to find a work around by getting javaStream from scala
stream and use Java api instead, but I don’t think it’s idea.
Did I miss something? Or it’s just a bug. If it is a bug, I can open a
issue and try to fix it.
Thanks.
Howard
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