Re: [undertow-dev] Async APIs?
What do you mean exactly by "not thread safe"?
It's my understanding that you'd use dispatch() in the handler, and then
proceed processing on the other thread. Is the problem that both your
own "worker" code and the parent http handlers could interact with the
exchange concurrently, which is solved by the dispatch(Executor,
Runnable) methods by delaying execution until the current handler is done?
yawkat
On 10/24/19 12:21 AM, Stuart Douglas wrote:
On Thu, 24 Oct 2019 at 01:23, Pavel Shirshov <pshirshov(a)gmail.com
<mailto:pshirshov@gmail.com>> wrote:
Hi guys,
Could you give me a hint if there is a way to write asynchronous
handlers?
So, I have my own asynchronous runtime (namely ZIO) and I wish
undertow's worker thread to do something while it's waiting for
request completion after a `dispatch` in my handler.
Is there an API allowing me to return a Future or undertow's
IOFuture so I may write an adaptor for my primitives?..
From what I can see there is that zero-arg `.dispatch()` method
which just changes internal flag. So, from what I can understand I
may just set that flag and then complete my request totally
asynchronously. Though that method is marked deprecated without an
alternative - other versions also wait for a `Runnable`.
In general you should not used the no arg version of dispatch(), it has
been deprecated as it is not thread safe.
If you want to just dispatch some work to a worker using the version
that takes a runnable sounds like exactly what you are after, as it will
run the runnable in a worker thread.
Stuart
--
Thanks,
Pavel
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