<div dir="ltr"><div class="gmail_extra"><div><div class="gmail_signature"><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><br></div></div></div></div></div></div><div class="gmail_quote">2016-03-07 14:40 GMT+01:00 Reza Rahman <span dir="ltr"><<a href="mailto:reza_rahman@lycos.com" target="_blank">reza_rahman@lycos.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div>There are way too many cases I can cite of the spec saying something is optional but good implementations doing what is actually right. Even in the worst reading of this, that is exactly what is happening here.</div><div><div class="h5"><div><br></div></div></div></div></blockquote><div><br></div><div>Reza take one day and re-read it with a not oriented eye: the spec states it shouldnt work. Let also ignore the concurrency utility for one moment since it covers only 50% of the cases and show me where the spec states it should be covered please.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div><div class="h5"><div>On Mar 7, 2016, at 8:12 AM, Romain Manni-Bucau <<a href="mailto:rmannibucau@gmail.com" target="_blank">rmannibucau@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">2016-03-07 14:06 GMT+01:00 Reza Rahman <span dir="ltr"><<a href="mailto:reza_rahman@lycos.com" target="_blank">reza_rahman@lycos.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div>What this is saying is that it is not recommended to use them because of the possible life-cycle mismatch. If they are not supposed to work at all, the specification would have simply stated it won't work.</div><div><br></div></div></blockquote><div><br></div><div>It is not stated so not supported, that's the way EE works whatever you think (if you doubt just use any of the SHOULD features in 2 servers ;)).</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div></div><div>Anyway personally I have no reason to further discuss this. I'm going to try to find a way to get this done for developers sooner rather than later. If TomEE does not want to do it, too bad for developers.</div><div><div><div><br></div></div></div></div></blockquote><div><br></div><div>This is not the point. I'm for getting it done but the spec states the opposite since it ignores not submitting instances completely and it states that submitting ones are not expected to work very clearly in the previous quote (not being deterministic means it doesn't work).</div><div><br></div><div>However the issue is wider than concurrency-utilities so even if you manage to get it done for this spec users can still face this issue. If I follow a context start/stop API is possible for 2.0 so question is really: should this API get inheritance or not.</div><div> </div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div><div><div>On Mar 7, 2016, at 3:49 AM, Romain Manni-Bucau <<a href="mailto:rmannibucau@gmail.com" target="_blank">rmannibucau@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">"<div>Tasks that are submitted to a managed instance of ExecutorService may still be running after the
lifecycle of the submitting component. Therefore, CDI beans with a scope of @RequestScoped,
@SessionScoped, or @ConversationScoped are not recommended to use as tasks as it cannot be guaranteed
that the tasks will complete before the CDI context is destroyed. <br></div><div>"</div><div><br></div><div>States that the context is not inherited, is that what you mean?</div><div><br></div></div><div class="gmail_extra"><br clear="all"><div><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><br><span style="font-size:small">Romain Manni-Bucau</span><br><a href="https://twitter.com/rmannibucau" target="_blank">@rmannibucau</a> | <a href="http://rmannibucau.wordpress.com" target="_blank">Blog</a> | <a href="https://github.com/rmannibucau" target="_blank">Github</a> | <a href="https://www.linkedin.com/in/rmannibucau" target="_blank">LinkedIn</a> | <a href="http://www.tomitribe.com" target="_blank">Tomitriber</a></div></div></div></div></div></div></div></div></div></div>
<br><div class="gmail_quote">2016-03-07 5:57 GMT+01:00 Reza Rahman <span dir="ltr"><<a href="mailto:reza_rahman@lycos.com" target="_blank">reza_rahman@lycos.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div>The specification currently references pretty much all the major CDI scopes specifically with the issue of propagation and lifecycle in mind. Please see section 2.3.</div><div><br>On Mar 6, 2016, at 11:53 PM, Mark Struberg <<a href="mailto:struberg@yahoo.de" target="_blank">struberg@yahoo.de</a>> wrote:<br>Specifically </div><div><div><blockquote type="cite"><div><div></div><div>The containers mimic ejb for propagation for a good reason!</div><div>No session e.g. , new TX, etc</div><div><br></div><div>Sadly the concurrency utilis only mention @ApplicationScoped, so the Request Context not only doesn't get propagated (which is good), but also doesn't get set up (which is crap).</div><div><br></div><div>LieGrue,</div><div>Strub</div><div><br>Am 06.03.2016 um 23:03 schrieb John D. Ament <<a href="mailto:john.d.ament@gmail.com" target="_blank">john.d.ament@gmail.com</a>>:<br><br></div><blockquote type="cite"><div><div dir="ltr">I agree, in a sense, with what you're saying. There's nothing in this spec that says it wouldn't be propagated. However, there's nothing in this spec that states clearly that CDI contexts are propagated.<div><br></div><div>If you look at the RI, the RI only seems to propagate transaction state. Considering the age of the spec, I'm not surprised to see that. The worst part is that right now, outside of the ASF, all other EE7 impls seem to be using the RI for concurrency.</div><div><br></div><div>I'm fairly certain that from this spec's standpoint, the only thing that's actually propagated is the transaction.</div><div><br></div><div>John<br><br><div class="gmail_quote"><div dir="ltr">On Sun, Mar 6, 2016 at 4:50 PM Reza Rahman <<a href="mailto:reza_rahman@lycos.com" target="_blank">reza_rahman@lycos.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div>I am re-reading the spec end to end again right now. So far it seems I have remembered everything correctly.</div><div><br></div><div>You should read over section 2.3. What it is saying is that a container implementing the Java EE concurrency utilities should ensure whatever contextual information is needed for managed components to work correctly should be propagated automatically. For the correct implementation of CDI scopes, this should also mean any currently active scopes. The section you are referring to is basically implying that thinking that it is possible to use these scoped beans in tasks (albeit not reliably since beans could go out of scope before the thread finishes - for example if the request ends).</div><div><br></div><div>This does not have anything to do with the context service per se. The context service is an SPI of sorts to allow end user developers to do for their own applications what the container does behind the scenes for managed component context propagation.</div><div><br></div><div>I'll read over the entire spec to see if there is anything to contradict this. If that's not the case what Romain is describing is most likely an implementation specific bug that did not take into account CDI scope propagation.</div></div><div dir="auto"><div><div><br></div>On Mar 6, 2016, at 4:23 PM, John D. Ament <<a href="mailto:john.d.ament@gmail.com" target="_blank">john.d.ament@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">Reza,<div><br></div><div>I read through the concurrency utils spec. Was there a specific section you had in mind? The only references to CDI were near the beginning warning users to not use Request/Session scoped beans as tasks since the outer most context may be destroyed before the work is done.</div><div><br></div><div>I have a feeling what you're referring to is the context service: <a href="http://docs.oracle.com/javaee/7/api/javax/enterprise/concurrent/ContextService.html" target="_blank">http://docs.oracle.com/javaee/7/api/javax/enterprise/concurrent/ContextService.html</a></div><div><br></div><div>If that's the case, then basically this should work OOTB right?</div><div><br></div><div>Task task = new MyTask();</div><div>task = contextService.createContextualProxy(task, Task.class);</div><div>executor.submit(task);</div><div><br></div><div>// now magically the context should be prop'd?</div><div><br></div><div>Is that about right?</div><div><br></div><div>John<br><br><div class="gmail_quote"><div dir="ltr">On Sun, Mar 6, 2016 at 3:30 PM Reza Rahman <<a href="mailto:reza_rahman@lycos.com" target="_blank">reza_rahman@lycos.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0 0 0 .8ex;border-left:1px #ccc solid;padding-left:1ex"><div dir="auto"><div>Have you actually looked at the EE concurrency spec text in detail? What does it say about managed component context propagation? </div><div><br></div><div>Without actually doing that further discussing this is just taking shots in the dark. As an implementer it should not surprise you that this might simply be a bug because the person implementing the concurrency utilities for the EE runtime was not told about what to copy over into the new thread for CDI to work correctly.</div></div><div dir="auto"><div><br>On Mar 6, 2016, at 3:06 PM, Romain Manni-Bucau <<a href="mailto:rmannibucau@gmail.com" target="_blank">rmannibucau@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr"><div class="gmail_extra"><div><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><br></div></div></div></div></div></div><div class="gmail_quote">2016-03-06 20:59 GMT+01:00 Reza Rahman <span dir="ltr"><<a href="mailto:reza_rahman@lycos.com" target="_blank">reza_rahman@lycos.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="auto"><div>As far as I know this is precisely the sort of thing that the EE concurrency spec is intended for. It is supposed to copy over everything from the underlying thread local context into the new thread for all EE managed components to function. Since CDI beans are also EE container managed, it also applies to CDI beans as well. The EE vendor is supposed to make sure this works properly.</div><div><br></div><div>I don't think the concurrency utilities specifically lists APIs for which thread context propagation should work. If this doesn't work in a specific implementation it's most likely because they didn't take CDI into account in their own EE concurrency implementation.</div><div><div><div><br></div></div></div></div></blockquote><div><br></div><div>That's what I wanted/would like. CDI TCK breaks it quite easily and @RequestScoped which is *used* today is sadly a @ThreadLocalScoped badly named. So to solve it we would need another scope as I mentionned several times on this list 100% matching servlet instances lifecycles (on a pure CDI side we have the same issue for sessions which are recycled during a request, the session scope is corrupted *by spec* in term of user behavior).</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="auto"><div><div><div>On Mar 6, 2016, at 2:45 PM, John D. Ament <<a href="mailto:john.d.ament@gmail.com" target="_blank">john.d.ament@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">The section of the spec you link to makes no references to threads. 6.3 makes some notes about normal scopes and threads, and specifically says that a context is bound to one or more threads.<div><br></div><div>I think what's happened is that over the years, people have simply bound HTTP Request == single thread, but when async processing was introduced no one thought to clarify that the spawning of a child thread from the original HTTP request retains the parent's context.</div><div><br></div><div>This is another requested feature, but looks more like a bug or gap in the spec.</div><div><br></div><div>John<br><br><div class="gmail_quote"><div dir="ltr">On Sun, Mar 6, 2016 at 2:37 PM Romain Manni-Bucau <<a href="mailto:rmannibucau@gmail.com" target="_blank">rmannibucau@gmail.com</a>> wrote:<br></div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">2016-03-06 20:25 GMT+01:00 Reza Rahman <span dir="ltr"><<a href="mailto:reza_rahman@lycos.com" target="_blank">reza_rahman@lycos.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="auto"><div>Let's see. I suspect the specification text for EE concurrency is generic enough for implementations to also be able to cover CDI scopes or any other Java EE API context propagation needs. This means the issue needs to be solved at the individual implementation level. Changing anything in the spec is probably just unnecessary ceremony in this case.</div><div><div><div><br></div></div></div></div></blockquote><div><br></div></div></div></div><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><div>Then 1. concurrency- utility can't be reliable for "EE" users, 2. CDI still prevent it to work since it would violate the spec to propagate it while request scope is bound to another thread (<a href="http://docs.jboss.org/cdi/spec/1.1/cdi-spec.html#request_context" target="_blank">http://docs.jboss.org/cdi/spec/1.1/cdi-spec.html#request_context</a> handles async listener but not the main AsyncContext part).</div></div></div></div><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote"><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="auto"><div><div><div>On Mar 6, 2016, at 2:15 PM, Romain Manni-Bucau <<a href="mailto:rmannibucau@gmail.com" target="_blank">rmannibucau@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr"><div class="gmail_extra"><div><div><div dir="ltr"><div dir="ltr"><div dir="ltr"><div dir="ltr"><br></div></div></div></div></div></div><div class="gmail_quote">2016-03-06 19:42 GMT+01:00 Reza Rahman <span dir="ltr"><<a href="mailto:reza_rahman@lycos.com" target="_blank">reza_rahman@lycos.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="auto"><div>This frankly surprises me. I'll check the specification text. This might indeed just be an implementation bug. The EE concurrency utilities are supposed to be copying all relevant context. If this is an issue than it has to be that it is not copying enough of the HTTP request context for CDI to work.</div><div><br></div></div></blockquote><div><br></div><div>The issue is not technical since I got it working but needed to reverse. From my understanding ee concurrency utilities was done in a time CDI was not there so it just ignored it somehow and it hasnt been updated when integrated to the spec. Now with the wording of the CDI - and TCK - it is impossible to make it working since request scope is bound the thre request thread - and not the request. Side note: same applies to session scope and conversation.</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="auto"><div></div><div>Surely the Red Hat folks can quickly shed some light here since they implement essentially this whole stack?</div><div><div><div><br>On Mar 6, 2016, at 1:30 PM, Romain Manni-Bucau <<a href="mailto:rmannibucau@gmail.com" target="_blank">rmannibucau@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr"><div class="gmail_extra"><div class="gmail_quote">2016-03-06 19:20 GMT+01:00 Reza Rahman <span dir="ltr"><<a href="mailto:reza_rahman@lycos.com" target="_blank">reza_rahman@lycos.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="auto"><div>Can you kindly try to make the example a bit simpler? It's important to make the case for how likely this is supposed to occur in most business applications.</div><div><br></div><div>Also, other than making sure that the executor service is propagating thread local request contexts correctly what other solution are you proposing? Did you check the specification? How sure are you that this isn't simply an implementation bug?</div><div><br></div><div>As far as I know the executor service is supposed to be preserving all relevant parts of the EE context?</div><div><div><div><br></div></div></div></div></blockquote><div><br></div><div>Not in concurrency-utilities for EE at least. That was the first impl I did then Mark pointed out it was violating CDI spec and request scope definition. There is a kind of contracdiction there cause concurrency-utilities doesn't integrate with CDI at all but we can also see it the opposite way: CDI doesn't provide any way to propagate a context in another thread. Both point of view are valid so we need to see where we tackle it.</div><div> </div><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="auto"><div><div><div>On Mar 6, 2016, at 12:35 PM, Romain Manni-Bucau <<a href="mailto:rmannibucau@gmail.com" target="_blank">rmannibucau@gmail.com</a>> wrote:<br><br></div><blockquote type="cite"><div><div dir="ltr">does <a href="https://gist.github.com/rmannibucau/d55fce47b001185dca3e" target="_blank">https://gist.github.com/rmannibucau/d55fce47b001185dca3e</a> help?<div><br></div><div>Idea is to give an API to make:</div><div><br></div><div><table style="border-collapse:collapse;border-spacing:0px;color:rgb(51,51,51);font-family:Helvetica,arial,nimbussansl,liberationsans,freesans,clean,sans-serif,'Apple Color Emoji','Segoe UI Emoji','Segoe UI Symbol';font-size:13px;line-height:18.2px"><tbody><tr><td style="padding:0px 10px;vertical-align:top;overflow:visible;font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:12px;word-wrap:normal;white-space:pre-wrap"> <span style="color:rgb(167,29,93)">public</span> <span style="color:rgb(167,29,93)">void</span> <span style="color:rgb(121,93,163)">complete</span>() {</td></tr><tr><td style="padding:0px 10px;width:50px;min-width:50px;font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:12px;line-height:18px;color:rgba(0,0,0,0.298039);text-align:right;white-space:nowrap;vertical-align:top;border-style:solid;border-color:rgb(238,238,238);border-width:0px 1px 0px 0px"></td><td style="padding:0px 10px;vertical-align:top;overflow:visible;font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:12px;word-wrap:normal;white-space:pre-wrap"> <span style="color:rgb(167,29,93)">try</span> {</td></tr><tr><td style="padding:0px 10px;width:50px;min-width:50px;font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:12px;line-height:18px;color:rgba(0,0,0,0.298039);text-align:right;white-space:nowrap;vertical-align:top;border-style:solid;border-color:rgb(238,238,238);border-width:0px 1px 0px 0px"></td><td style="padding:0px 10px;vertical-align:top;overflow:visible;font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:12px;word-wrap:normal;white-space:pre-wrap"> asyncContext<span style="color:rgb(167,29,93)">.</span>complete();</td></tr><tr><td style="padding:0px 10px;width:50px;min-width:50px;font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:12px;line-height:18px;color:rgba(0,0,0,0.298039);text-align:right;white-space:nowrap;vertical-align:top;border-style:solid;border-color:rgb(238,238,238);border-width:0px 1px 0px 0px"></td><td style="padding:0px 10px;vertical-align:top;overflow:visible;font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:12px;word-wrap:normal;white-space:pre-wrap"> } <span style="color:rgb(167,29,93)">finally</span> {</td></tr><tr><td style="padding:0px 10px;width:50px;min-width:50px;font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:12px;line-height:18px;color:rgba(0,0,0,0.298039);text-align:right;white-space:nowrap;vertical-align:top;border-style:solid;border-color:rgb(238,238,238);border-width:0px 1px 0px 0px"></td><td style="padding:0px 10px;vertical-align:top;overflow:visible;font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:12px;word-wrap:normal;white-space:pre-wrap"> auditContext<span style="color:rgb(167,29,93)">.</span>end();</td></tr><tr><td style="padding:0px 10px;width:50px;min-width:50px;font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:12px;line-height:18px;color:rgba(0,0,0,0.298039);text-align:right;white-space:nowrap;vertical-align:top;border-style:solid;border-color:rgb(238,238,238);border-width:0px 1px 0px 0px"></td><td style="padding:0px 10px;vertical-align:top;overflow:visible;font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:12px;word-wrap:normal;white-space:pre-wrap"> }</td></tr><tr><td style="padding:0px 10px;width:50px;min-width:50px;font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:12px;line-height:18px;color:rgba(0,0,0,0.298039);text-align:right;white-space:nowrap;vertical-align:top;border-style:solid;border-color:rgb(238,238,238);border-width:0px 1px 0px 0px"></td><td style="padding:0px 10px;vertical-align:top;overflow:visible;font-family:Consolas,'Liberation Mono',Menlo,Courier,monospace;font-size:12px;word-wrap:normal;white-space:pre-wrap"> }
</td></tr></tbody></table></div><div class="gmail_extra"><br clear="all"><div><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div>working without hacky and almost impossible context pushing (cause of injections nature you are not supposed to know what to push in the context when going async).</div><div><br></div><div><br></div><div><br><span style="font-size:small">Romain Manni-Bucau</span><br><a href="https://twitter.com/rmannibucau" target="_blank">@rmannibucau</a> | <a href="http://rmannibucau.wordpress.com" target="_blank">Blog</a> | <a href="https://github.com/rmannibucau" target="_blank">Github</a> | <a href="https://www.linkedin.com/in/rmannibucau" target="_blank">LinkedIn</a> | <a href="http://www.tomitribe.com" target="_blank">Tomitriber</a></div></div></div></div></div></div></div></div></div></div>
<br><div class="gmail_quote">2016-03-06 16:40 GMT+01:00 Reza Rahman <span dir="ltr"><<a href="mailto:reza_rahman@lycos.com" target="_blank">reza_rahman@lycos.com</a>></span>:<br><blockquote class="gmail_quote" style="margin:0px 0px 0px 0.8ex;border-left-width:1px;border-left-color:rgb(204,204,204);border-left-style:solid;padding-left:1ex"><div dir="auto"><div>Can you kindly share an annotated code example of the proposed solution so we can all follow and discuss this?</div><div><br>On Mar 6, 2016, at 9:31 AM, Romain Manni-Bucau <<a href="mailto:rmannibucau@gmail.com" target="_blank">rmannibucau@gmail.com</a>> wroteshar:<br><br></div><div><div><blockquote type="cite"><div><div dir="ltr">Hi guys,<div><br></div><div>spoke on concurrency utilities about the ability to inherit a cdi scope. Idea is to follow request scope more than cdi spec allows. First thought it was a concurrency utilities thing but Reza mentionned can be a CDI one so here it is.</div><div><br></div><div>Sample:</div><div>In a servlet i get MyBean which is @RequestScoped, I do some set on it. The i go async (AsyncContext) and trigger a task in another thread. It would be neat - and mandatory in some case by the loose coupling nature of CDI - to get the *same* MyBean *instance* in this thread. With a direct dependency you can easily use message passing pattern - but you loose the loose coupling cause you need to know until which level you unwrap, think t principal case which has 2-3 proxies!. However in practice you have a lot of undirect dependencies, in particular with enterprise concerns (auditing, security...) so you can't really do it easily/naturally.</div><div><br></div><div>Bonus:</div><div>One very verbose way is to be able to kind of push/pop an existing context in a thread - wrappers doing it on a Runnable/Consumer/Function/... would be neat.</div><div><br></div><div>Question:</div><div>Would CDI handle it in 2.0?</div><div><br></div><div>Side note: this is really about the fact to reuse a "context context" (its current instances map) in another thread the more transparently possible and match the user vision more than a technical question for now.</div><div><br clear="all"><div><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><div dir="ltr"><div><br><span style="font-size:small">Romain Manni-Bucau</span><br><a href="https://twitter.com/rmannibucau" target="_blank">@rmannibucau</a> | <a href="http://rmannibucau.wordpress.com" target="_blank">Blog</a> | <a href="https://github.com/rmannibucau" target="_blank">Github</a> | <a href="https://www.linkedin.com/in/rmannibucau" target="_blank">LinkedIn</a> | <a href="http://www.tomitribe.com" target="_blank">Tomitriber</a></div></div></div></div></div></div></div></div></div></div>
</div></div>
</div></blockquote></div></div><blockquote type="cite"><div><span>_______________________________________________</span><br><span>cdi-dev mailing list</span><br><span><a href="mailto:cdi-dev@lists.jboss.org" target="_blank">cdi-dev@lists.jboss.org</a></span><br><span><a href="https://lists.jboss.org/mailman/listinfo/cdi-dev" target="_blank">https://lists.jboss.org/mailman/listinfo/cdi-dev</a></span><br><span></span><br><span>Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 (<a href="http://www.apache.org/licenses/LICENSE-2.0.html" target="_blank">http://www.apache.org/licenses/LICENSE-2.0.html</a>). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information.</span></div></blockquote></div><br>_______________________________________________<br>
cdi-dev mailing list<br>
<a href="mailto:cdi-dev@lists.jboss.org" target="_blank">cdi-dev@lists.jboss.org</a><br>
<a href="https://lists.jboss.org/mailman/listinfo/cdi-dev" rel="noreferrer" target="_blank">https://lists.jboss.org/mailman/listinfo/cdi-dev</a><br>
<br>
Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 (<a href="http://www.apache.org/licenses/LICENSE-2.0.html" rel="noreferrer" target="_blank">http://www.apache.org/licenses/LICENSE-2.0.html</a>). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information.<br></blockquote></div><br></div></div>
</div></blockquote></div></div></div><br>_______________________________________________<br>
cdi-dev mailing list<br>
<a href="mailto:cdi-dev@lists.jboss.org" target="_blank">cdi-dev@lists.jboss.org</a><br>
<a href="https://lists.jboss.org/mailman/listinfo/cdi-dev" rel="noreferrer" target="_blank">https://lists.jboss.org/mailman/listinfo/cdi-dev</a><br>
<br>
Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 (<a href="http://www.apache.org/licenses/LICENSE-2.0.html" rel="noreferrer" target="_blank">http://www.apache.org/licenses/LICENSE-2.0.html</a>). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information.<br></blockquote></div><br></div></div>
</div></blockquote></div></div></div><br>_______________________________________________<br>
cdi-dev mailing list<br>
<a href="mailto:cdi-dev@lists.jboss.org" target="_blank">cdi-dev@lists.jboss.org</a><br>
<a href="https://lists.jboss.org/mailman/listinfo/cdi-dev" rel="noreferrer" target="_blank">https://lists.jboss.org/mailman/listinfo/cdi-dev</a><br>
<br>
Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 (<a href="http://www.apache.org/licenses/LICENSE-2.0.html" rel="noreferrer" target="_blank">http://www.apache.org/licenses/LICENSE-2.0.html</a>). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information.<br></blockquote></div><br></div></div>
</div></blockquote></div></div></div><br>_______________________________________________<br>
cdi-dev mailing list<br>
<a href="mailto:cdi-dev@lists.jboss.org" target="_blank">cdi-dev@lists.jboss.org</a><br>
<a href="https://lists.jboss.org/mailman/listinfo/cdi-dev" rel="noreferrer" target="_blank">https://lists.jboss.org/mailman/listinfo/cdi-dev</a><br>
<br>
Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 (<a href="http://www.apache.org/licenses/LICENSE-2.0.html" rel="noreferrer" target="_blank">http://www.apache.org/licenses/LICENSE-2.0.html</a>). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information.<br></blockquote></div></div></div>
_______________________________________________<br>
cdi-dev mailing list<br>
<a href="mailto:cdi-dev@lists.jboss.org" target="_blank">cdi-dev@lists.jboss.org</a><br>
<a href="https://lists.jboss.org/mailman/listinfo/cdi-dev" rel="noreferrer" target="_blank">https://lists.jboss.org/mailman/listinfo/cdi-dev</a><br>
<br>
Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 (<a href="http://www.apache.org/licenses/LICENSE-2.0.html" rel="noreferrer" target="_blank">http://www.apache.org/licenses/LICENSE-2.0.html</a>). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information.</blockquote></div></div></div>
</div></blockquote></div></div></div><br>_______________________________________________<br>
cdi-dev mailing list<br>
<a href="mailto:cdi-dev@lists.jboss.org" target="_blank">cdi-dev@lists.jboss.org</a><br>
<a href="https://lists.jboss.org/mailman/listinfo/cdi-dev" rel="noreferrer" target="_blank">https://lists.jboss.org/mailman/listinfo/cdi-dev</a><br>
<br>
Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 (<a href="http://www.apache.org/licenses/LICENSE-2.0.html" rel="noreferrer" target="_blank">http://www.apache.org/licenses/LICENSE-2.0.html</a>). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information.<br></blockquote></div><br></div></div>
</div></blockquote></div>_______________________________________________<br>
cdi-dev mailing list<br>
<a href="mailto:cdi-dev@lists.jboss.org" target="_blank">cdi-dev@lists.jboss.org</a><br>
<a href="https://lists.jboss.org/mailman/listinfo/cdi-dev" rel="noreferrer" target="_blank">https://lists.jboss.org/mailman/listinfo/cdi-dev</a><br>
<br>
Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 (<a href="http://www.apache.org/licenses/LICENSE-2.0.html" rel="noreferrer" target="_blank">http://www.apache.org/licenses/LICENSE-2.0.html</a>). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information.</blockquote></div></div></div>
</div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>cdi-dev mailing list</span><br><span><a href="mailto:cdi-dev@lists.jboss.org" target="_blank">cdi-dev@lists.jboss.org</a></span><br><span><a href="https://lists.jboss.org/mailman/listinfo/cdi-dev" target="_blank">https://lists.jboss.org/mailman/listinfo/cdi-dev</a></span><br><span></span><br><span>Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 (<a href="http://www.apache.org/licenses/LICENSE-2.0.html" target="_blank">http://www.apache.org/licenses/LICENSE-2.0.html</a>). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information.</span></div></blockquote></div>_______________________________________________<br>
cdi-dev mailing list<br>
<a href="mailto:cdi-dev@lists.jboss.org" target="_blank">cdi-dev@lists.jboss.org</a><br>
<a href="https://lists.jboss.org/mailman/listinfo/cdi-dev" rel="noreferrer" target="_blank">https://lists.jboss.org/mailman/listinfo/cdi-dev</a><br>
<br>
Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 (<a href="http://www.apache.org/licenses/LICENSE-2.0.html" rel="noreferrer" target="_blank">http://www.apache.org/licenses/LICENSE-2.0.html</a>). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information.</blockquote></div></div></div>
</div></blockquote><blockquote type="cite"><div><span>_______________________________________________</span><br><span>cdi-dev mailing list</span><br><span><a href="mailto:cdi-dev@lists.jboss.org" target="_blank">cdi-dev@lists.jboss.org</a></span><br><span><a href="https://lists.jboss.org/mailman/listinfo/cdi-dev" target="_blank">https://lists.jboss.org/mailman/listinfo/cdi-dev</a></span><br><span></span><br><span>Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 (<a href="http://www.apache.org/licenses/LICENSE-2.0.html" target="_blank">http://www.apache.org/licenses/LICENSE-2.0.html</a>). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information.</span></div></blockquote></div></blockquote></div></div></div><br>_______________________________________________<br>
cdi-dev mailing list<br>
<a href="mailto:cdi-dev@lists.jboss.org" target="_blank">cdi-dev@lists.jboss.org</a><br>
<a href="https://lists.jboss.org/mailman/listinfo/cdi-dev" rel="noreferrer" target="_blank">https://lists.jboss.org/mailman/listinfo/cdi-dev</a><br>
<br>
Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 (<a href="http://www.apache.org/licenses/LICENSE-2.0.html" rel="noreferrer" target="_blank">http://www.apache.org/licenses/LICENSE-2.0.html</a>). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information.<br></blockquote></div><br></div>
</div></blockquote></div></div></div><br>_______________________________________________<br>
cdi-dev mailing list<br>
<a href="mailto:cdi-dev@lists.jboss.org" target="_blank">cdi-dev@lists.jboss.org</a><br>
<a href="https://lists.jboss.org/mailman/listinfo/cdi-dev" rel="noreferrer" target="_blank">https://lists.jboss.org/mailman/listinfo/cdi-dev</a><br>
<br>
Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 (<a href="http://www.apache.org/licenses/LICENSE-2.0.html" rel="noreferrer" target="_blank">http://www.apache.org/licenses/LICENSE-2.0.html</a>). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information.<br></blockquote></div><br></div></div>
</div></blockquote></div></div></div><br>_______________________________________________<br>
cdi-dev mailing list<br>
<a href="mailto:cdi-dev@lists.jboss.org">cdi-dev@lists.jboss.org</a><br>
<a href="https://lists.jboss.org/mailman/listinfo/cdi-dev" rel="noreferrer" target="_blank">https://lists.jboss.org/mailman/listinfo/cdi-dev</a><br>
<br>
Note that for all code provided on this list, the provider licenses the code under the Apache License, Version 2 (<a href="http://www.apache.org/licenses/LICENSE-2.0.html" rel="noreferrer" target="_blank">http://www.apache.org/licenses/LICENSE-2.0.html</a>). For all other ideas provided on this list, the provider waives all patent and other intellectual property rights inherent in such information.<br></blockquote></div><br></div></div>