See Bean#getScope() and BeanManager#getContext() Just uses Class and no Annotation instance.

Lgm -------------------------------------------- On Sun, 20/3/16, Romain Manni-Bucau <rmannibucau(a)gmail.com&gt; wrote: Subject: Re: [cdi-dev] @ThreadScoped? To: "Mark Struberg" <struberg(a)yahoo.de&gt; Cc: cdi-dev(a)lists.jboss.org, "Reza Rahman" <reza_rahman(a)lycos.com&gt; Date: Sunday, 20 March, 2016, 20:47 Le 20 mars 2016 20:40, "Mark Struberg" <struberg(a)yahoo.de&gt; a écrit : > > A scope annotation cannot have a flag. > Why? Technically it can > LieGrue, > strub > > > > > On Sunday, 20 March 2016, 20:25, Reza Rahman <reza_rahman(a)lycos.com&gt; wrote: > > > > > > > >As discussed elsewhere in this EG, even in the most pessimistic reading of the current spec, all that would be needed is a flag on the existing annotation. It's not out of the question at all. > > > >On Mar 20, 2016, at 1:36 PM, Manfred Riem <mnriem(a)gmail.com&gt; wrote: > > > > > >Why is changing @RequestScoped out of the question? > >> > >> > >>From my perspective when an AsyncContext is started the request is still there. > >> > >> > >>It is just being served by a different thread. > >> > >> > >>Certainly there is a need to work with the Servlet EG to figure out how to transfer “ownership” to the AsyncContext. > >> > >> > >>Anyway my 2 cents > >> > >> > >>Thanks! > >> > >> > >>Kind regards, > >>Manfred Riem > >> > >> > >>On Mar 19, 2016, at 3:35 PM, Stephan Knitelius <stephan(a)knitelius.com&gt; wrote: > >>> > >>>I would certainly agree with the assertion that in general it's not advisable to execute a request with multiple threads and that usually single threaded execution is sufficient. > >>> > >>>However I don't think ignoring it is an option. Concurrent operations can be launched even from CDI beans. Yet we don't properly support context propagation nor a context spanning all threads launched from a request. > >>> > >>>I know that changing @requestScoped is probably out of the question, but at least we should consider adding a new context spanning all threads and defining a logical solution for context propagation that can be explained to the end user. > >>> > >>> > >>> > >>> > >>>On Fr., 11. März 2016 at 17:17, Mark Struberg <struberg(a)yahoo.de&gt; wrote: > >>> > >>>Yes, but certain things in EE are assumed to be handled on a single thread. And if you run on a servr then this is really not a blocker most times. If I get many paralllel requests hitting my box then I do not need async handling _that_ often. The whole overhead for setting up the new thread, etc often heavily exceeds the benefits. > >>>>So I would not put too much energy into it… > >>>> > >>>>LieGrue, > >>>>strub > >>>> > >>>>> Am 11.03.2016 um 15:44 schrieb Reza Rahman <reza_rahman(a)lycos.com&gt;: > >>>>> > >>>>> This is essentially in keeping with the minimalist nature of the EE concurrency JSR. I believe most of it is left to vendors to do the right thing for users. May be a good idea is this language can be tightened up. > >>>>> > >>>>>> On Mar 11, 2016, at 6:01 AM, Mark Struberg <struberg(a)yahoo.de&gt; wrote: > >>>>>> E > >>>>>> From the servlet spec: > >>>>>> > >>>>>> „Java Enterprise Edition features such as Section 15.2.2, “Web Application Environment” on page 15-174 and Section 15.3.1, “Propagation of Security Identity in EJBTM Calls” on page 15-176 are available only to threads executing the initial request or when the request is dispatched to the container via the AsyncContext.dispatch method. Java Enterprise Edition features may be available to other threads operating directly on the response object via the AsyncContext.start(Runnable) method.“ > >>>>>> > >>>>>> check „available only to threads executing the initial request“ > >>>>>> > >>>>>> Also if you look at the servlet AsyncContext then all the wording is written as MAY and not as MUST. > >>>>>> > >>>>>> LieGrue, > >>>>>> strub > >>>>>> > >>>>>> > >>>>>>> Am 10.03.2016 um 19:52 schrieb Romain Manni-Bucau < rmannibucau(a)gmail.com&gt;: > >>>>>>> > >>>>>>> Hi Mark, > >>>>>>> > >>>>>>> think 2.3.3.4 states the opposite. > >>>>>>> > >>>>>>> > >>>>>>> Romain Manni-Bucau > >>>>>>> @rmannibucau | Blog | Github | LinkedIn | Tomitriber > >>>>>>> > >>>>>>> 2016-03-10 19:43 GMT+01:00 Mark Struberg <struberg(a)yahoo.de&gt;: > >>>>>>> Back from JavaLand conference, so sorry for not kicking in earlier. > >>>>>>> > >>>>>>> I not quite get the argumentation chain. It’s that all triggered by async servlet requests? And isn’t the servlet spec also saying that all the request param etc may max be assigned to a single thread AT A TIME! > >>>>>>> > >>>>>>> Means that it might not be on multiple threads in parallel, but the data is allowed to get moved from one thread to another (disapearing from the first one), right? > >>>>>>> Would really need to dig into the wording of the async servlets spec again, maybe has this in the back of his head? > >>>>>>> > >>>>>>> LieGrue, > >>>>>>> strub > >>>>>>> > >>>>>>> > >>>>>>> > >>>>>>> > >>>>>>>> Am 08.03.2016 um 14:43 schrieb Romain Manni-Bucau < rmannibucau(a)gmail.com&gt;: > >>>>>>>> > >>>>>>>> Hi guys, > >>>>>>>> > >>>>>>>> following request scope thread and to center the discussion on the thread safety part: do we work on this? > >>>>>>>> > >>>>>>>> Background: @RequestScoped is often used as a ThreadLocal instance solution. A lot of SE or Batch implementations rely on it from what I saw as well as async implementations reusing existing business logic with this thread safety constraint. > >>>>>>>> > >>>>>>>> Proposal: providing a @ThreadScoped implementation is cheap for CDI and implemenation and would avoid the headache we can have with @RequestScoped. Will also remove the quite dark side of the spec regarding servlet request and request scope since now we would have a more natural solution for all of these situation so @RequestScoped goals wouldn't collide as much. > >>>>>>>> > >>>>>>>> Questions: > >>>>>>>> - is it automatically started as request scoped is (JMS, @Async, ...)? Alternative could be some configuration in beans.xml (merged accross the app): > >>>>>>>> > >>>>>>>> <beans> > >>>>>>>> <scopes> > >>>>>>>> <thread> > >>>>>>>> <active>JMS</active> > >>>>>>>> <active>ASYNCHONOUS</active> > >>>>>>>> </thread> > >>>>>>>> </scopes> > >>>>>>>> </beans> > >>>>>>>> > >>>>>>>> - start/stop API (this is typically an API the user should be able to control for its own threads) > >>>>>>>> - CDI 2.*0*? > >>>>>>>> > >>>>>>>> wdyt? > >>>>>>>> > >>>>>>>> Romain Manni-Bucau > >>>>>>>> @rmannibucau | Blog | Github | LinkedIn | Tomitriber > >>>>>>>> _______________________________________________ > >>>>>>>> cdi-dev mailing list > >>>>>>>> cdi-dev(a)lists.jboss.org > >>>>>>>> https://lists.jboss.org/mailman/listinfo/cdi-dev > >>>>>>>> > >>>>>>>> Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 ( http://www.apache.org/licenses/LICENSE-2.0.html). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information. > >>>>>>> > >>>>>>> > >>>>>> > >>>>>> > >>>>>> _______________________________________________ > >>>>>> cdi-dev mailing list > >>>>>> cdi-dev(a)lists.jboss.org > >>>>>> https://lists.jboss.org/mailman/listinfo/cdi-dev > >>>>>> > >>>>>> Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 ( http://www.apache.org/licenses/LICENSE-2.0.html). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information. > >>>>> > >>>>> _______________________________________________ > >>>>> cdi-dev mailing list > >>>>> cdi-dev(a)lists.jboss.org > >>>>> https://lists.jboss.org/mailman/listinfo/cdi-dev > >>>>> > >>>>> Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 ( http://www.apache.org/licenses/LICENSE-2.0.html). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information. > >>>> > >>>> > >>>>_______________________________________________ > >>>>cdi-dev mailing list > &gt;&gt;&gt;&gt;cdi-dev(a)lists.jboss.org > >>>>https://lists.jboss.org/mailman/listinfo/cdi-dev > >>>> > >>>>Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 ( http://www.apache.org/licenses/LICENSE-2.0.html). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information. > _______________________________________________ > >>>cdi-dev mailing list > &gt;&gt;&gt;cdi-dev(a)lists.jboss.org > >>>https://lists.jboss.org/mailman/listinfo/cdi-dev > >>> > >>>Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 ( http://www.apache.org/licenses/LICENSE-2.0.html). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information. > >> > >_______________________________________________ > >cdi-dev mailing list > &gt;cdi-dev(a)lists.jboss.org > >https://lists.jboss.org/mailman/listinfo/cdi-dev > > > >Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 ( http://www.apache.org/licenses/LICENSE-2.0.html). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information. > > > > > > _______________________________________________ > cdi-dev mailing list > cdi-dev(a)lists.jboss.org > https://lists.jboss.org/mailman/listinfo/cdi-dev > > Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 ( http://www.apache.org/licenses/LICENSE-2.0.html). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information.

Sorry for my brevity. Was on a cellphone only. My point is: Context#get(Bean<T>) and Bean<T> only has getScope() which

public Class<? extends Annotation> getScope(); Thus having something like @RequestScoped(allowMultithreads=true) public class BlaBlaController {..} would get represented by a Bean<BlaBlaController> which could only return

There is simply no way to return the "allowMultithreads=true" information

The same applies to BeanManager#getContext(): public Context getContext(Class<? extends Annotation> scope);

No Annotation but Class, you see? -> Currently there is no way to evaluate an additional attribute on a

And thus section 2.4.2 of the CDI specification also clearly states "A scope type must not have any attributes. If a scope type has

But the Context only gets the information from the Bean<T>. And that only

Not quite sure how you imagine this should work.

LieGrue, strub

On Sunday, 20 March 2016, 22:13, Romain Manni-Bucau <rmannibucau(a)gmail.com&gt;

>Le 20 mars 2016 22:03, "Mark Struberg" <struberg(a)yahoo.de&gt; a écrit : >> >> >> >> Sorry for my brevity. Was on a cellphone only. >> >> >> My point is: Context#get(Bean<T>) and Bean<T> only has getScope()

>> >> public Class<? extends Annotation> getScope(); >> >> Thus having something like >> >> @RequestScoped(allowMultithreads=true) >> public class BlaBlaController {..} >> >> would get represented by a Bean<BlaBlaController> which could only

>> There is simply no way to return the "allowMultithreads=true"

>> >> The same applies to BeanManager#getContext(): >> >> public Context getContext(Class<? extends Annotation> scope); >> >Not related to me since the context should handle it and not the bean

>> >> No Annotation but Class, you see? >> >> -> Currently there is no way to evaluate an additional attribute on a

>> >> >> And thus section 2.4.2 of the CDI specification also clearly states >> "A scope type must not have any attributes. If a scope type has

>> >Nothing we cant change and worde case change the flag to an own

> > >> roger? >> >> LieGrue, >> strub >> >> >> >> >> On Sunday, 20 March 2016, 21:12, Romain Manni-Bucau <

>> > >> >Le 20 mars 2016 21:07, "Mark Struberg" <struberg(a)yahoo.de&gt; a écrit : >> >> >> >> See Bean#getScope() and BeanManager#getContext() >> >> >> >> Just uses Class and no Annotation instance. >> >> >> >That's ok I think. Since 1.2 you can get meta from any bean and find

>> >Would also break the Annotated contravt if true. >> >> Lgm >> >> >> >> >> >> _______________________________________________ >> cdi-dev mailing list >> cdi-dev(a)lists.jboss.org >> https://lists.jboss.org/mailman/listinfo/cdi-dev >> >> Note that for all code provided on this list, the provider licenses

> >