New subject: [JBoss JIRA] (CDI-633) Intoroduce BeanManager.event()

Friday, 7 October 2016

The confusion between the existing BeanManager.fireEvent()
(JIRA comments sometimes just call it "fire") and this newly proposed
method should be avoided.
Backward-compatibility means the existing ones should still work as they do
of course.

What's the rationale behind just wanting to call it "event". It would
return an Event object. All but the void methods (including fireEvent)
follow certain conventions like
- get*
- create*
- is*
- are*
depending on what they return.

Why would a non-void non-static method of an existing interface that
returns something suddenly break with these conventions? If the existing
fireEvent method did not exist, it may be less problematic, though other
than the static accessor method current() in the CDI class, I am not aware
of interfaces doing that so far.

However having fireEvent in the same interface, just calling a "getter"
method event() makes that even more ambiguous and easy to misinterpret.

Werner

On Fri, Oct 7, 2016 at 1:59 PM, <cdi-dev-request(a)lists.jboss.org&gt; wrote:

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 Today's Topics:

    1. [JBoss JIRA] (CDI-224) Support Decoration of no interface
       beans (Antoine Sabot-Durand (JIRA))
    2. [JBoss JIRA] (CDI-526) Include filters
       (Antoine Sabot-Durand (JIRA))
    3. [JBoss JIRA] (CDI-613) Container should be able to receive
       information about the context in which it was bootstraped
       (Antoine Sabot-Durand (JIRA))
    4. [JBoss JIRA] (CDI-633) Intoroduce BeanManager.event()
       (Antoine Sabot-Durand (JIRA))
    5. [JBoss JIRA] (CDI-613) Container should be able to receive
       information about the context in which it was bootstraped
       (Antoine Sabot-Durand (JIRA))
    6. [JBoss JIRA] (CDI-612)
       ObserverMethodConfigurator.notifyWith() should probably accept a
       functional interface whose method throws java.lang.Exception
       (Antoine Sabot-Durand (JIRA))
    7. [JBoss JIRA] (CDI-601) Add container lifecycle event fired
       before container destroys all contexts (Antoine Sabot-Durand (JIRA))
    8. [JBoss JIRA] (CDI-593) Mention
       javax.enterprise.inject.spi.Prioritized in spec text and improve
       its javadoc (Antoine Sabot-Durand (JIRA))
    9. [JBoss JIRA] (CDI-592) Consider adding
       ObserverMethod.notify() method which also accepts EventMetadata
       (Antoine Sabot-Durand (JIRA))
   10. [JBoss JIRA] (CDI-561) Add the possibility to unmanage a bean
       instance (Antoine Sabot-Durand (JIRA))

 ----------------------------------------------------------------------

 Message: 4
 Date: Fri, 7 Oct 2016 07:33:00 -0400 (EDT)
 From: "Antoine Sabot-Durand (JIRA)" <issues(a)jboss.org&gt;
 Subject: [cdi-dev] [JBoss JIRA] (CDI-633) Intoroduce
         BeanManager.event()
 To: cdi-dev(a)lists.jboss.org
 Message-ID:
         <JIRA.12650965.1474369800000.72245.1475839980420(a)Atlassian.JIRA&gt;
 Content-Type: text/plain; charset=UTF-8

      [ https://issues.jboss.org/browse/CDI-633?page=com.
 atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

 Antoine Sabot-Durand updated CDI-633:
 -------------------------------------
     Fix Version/s: 2.0 .Final
                        (was: 2.0 (discussion))

 > Intoroduce BeanManager.event()
 > ------------------------------
 >
 >                 Key: CDI-633
 >                 URL: https://issues.jboss.org/browse/CDI-633
 >             Project: CDI Specification Issues
 >          Issue Type: Feature Request
 >            Reporter: Martin Kouba
 >             Fix For: 2.0 .Final
 >
 >
 > * this would allow to define the _specified type_ - the container may
 use the specified type to infer the parameterized type of the event types
 > * the method should return {{javax.enterprise.event.Event<Object>}}
 with no qualifiers

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 Message: 5
 Date: Fri, 7 Oct 2016 07:47:00 -0400 (EDT)
 From: "Antoine Sabot-Durand (JIRA)" <issues(a)jboss.org&gt;
 Subject: [cdi-dev] [JBoss JIRA] (CDI-613) Container should be able to
         receive information about the context in which it was bootstraped
 To: cdi-dev(a)lists.jboss.org
 Message-ID:
         <JIRA.12629498.1464972649000.72322.1475840820239(a)Atlassian.JIRA&gt;
 Content-Type: text/plain; charset=UTF-8

      [ https://issues.jboss.org/browse/CDI-613?page=com.
 atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

 Antoine Sabot-Durand updated CDI-613:
 -------------------------------------
     Fix Version/s: TBD
                        (was: 2.0 (discussion))

 > Container should be able to receive information about the context in
 which it was bootstraped
 > ------------------------------------------------------------
 ---------------------------------
 >
 >                 Key: CDI-613
 >                 URL: https://issues.jboss.org/browse/CDI-613
 >             Project: CDI Specification Issues
 >          Issue Type: Feature Request
 >          Components: Java EE integration
 >            Reporter: Antoine Sabot-Durand
 >             Fix For: TBD
 >
 >
 > Today it's impossible to know what is the outside context of the CDI
 container (i.e what is the application or EE module it belongs to).
 > This is problematic for other spec like JPA who needs to retrieve their
 information (persistence units) from a portable extension.
 > This would help solving issues like WFLY-2387 in a portable way.

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 ------------------------------

 Message: 6
 Date: Fri, 7 Oct 2016 07:47:00 -0400 (EDT)
 From: "Antoine Sabot-Durand (JIRA)" <issues(a)jboss.org&gt;
 Subject: [cdi-dev] [JBoss JIRA] (CDI-612)
         ObserverMethodConfigurator.notifyWith() should probably accept a
         functional interface whose method throws java.lang.Exception
 To: cdi-dev(a)lists.jboss.org
 Message-ID:
         <JIRA.12629421.1464951703000.72324.1475840820290(a)Atlassian.JIRA&gt;
 Content-Type: text/plain; charset=UTF-8

      [ https://issues.jboss.org/browse/CDI-612?page=com.
 atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

 Antoine Sabot-Durand updated CDI-612:
 -------------------------------------
     Fix Version/s: 2.0 .Final
                        (was: 2.0 (discussion))

 > ObserverMethodConfigurator.notifyWith() should probably accept a
 functional interface whose method throws java.lang.Exception
 > ------------------------------------------------------------
 -----------------------------------------------------------------
 >
 >                 Key: CDI-612
 >                 URL: https://issues.jboss.org/browse/CDI-612
 >             Project: CDI Specification Issues
 >          Issue Type: Clarification
 >    Affects Versions: 2.0-EDR1
 >            Reporter: Martin Kouba
 >             Fix For: 2.0 .Final
 >
 >
 > The regular observer methods may also throw checked exceptions (wrapped
 and rethrown as an (unchecked) {{ObserverException}}).

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 ------------------------------

 Message: 7
 Date: Fri, 7 Oct 2016 07:52:01 -0400 (EDT)
 From: "Antoine Sabot-Durand (JIRA)" <issues(a)jboss.org&gt;
 Subject: [cdi-dev] [JBoss JIRA] (CDI-601) Add container lifecycle
         event fired before container destroys all contexts
 To: cdi-dev(a)lists.jboss.org
 Message-ID:
         <JIRA.12626142.1463386462000.72386.1475841121230(a)Atlassian.JIRA&gt;
 Content-Type: text/plain; charset=UTF-8

      [ https://issues.jboss.org/browse/CDI-601?page=com.
 atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

 Antoine Sabot-Durand resolved CDI-601.
 --------------------------------------
     Resolution: Duplicate Issue

 Duplicates CDI-625

 > Add container lifecycle event fired before container destroys all
 contexts
 > ------------------------------------------------------------
 --------------
 >
 >                 Key: CDI-601
 >                 URL: https://issues.jboss.org/browse/CDI-601
 >             Project: CDI Specification Issues
 >          Issue Type: Feature Request
 >            Reporter: Martin Kouba
 >             Fix For: 2.0 (discussion)
 >
 >
 > The name might be something like {{BeforeContainerShutdown}}. Note that
 we probably cannot change the name or semantics of {{BeforeShutdown}},
 which is fired after container destroys all contexts. The motivation is to
 allow the beans to perform some kind of cleanup before dependencies could
 be disposed (the ordering of destruction is not defined).

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 Message: 8
 Date: Fri, 7 Oct 2016 07:54:01 -0400 (EDT)
 From: "Antoine Sabot-Durand (JIRA)" <issues(a)jboss.org&gt;
 Subject: [cdi-dev] [JBoss JIRA] (CDI-593) Mention
         javax.enterprise.inject.spi.Prioritized in spec text and improve
 its
         javadoc
 To: cdi-dev(a)lists.jboss.org
 Message-ID:
         <JIRA.12611926.1458825009000.72430.1475841241255(a)Atlassian.JIRA&gt;
 Content-Type: text/plain; charset=UTF-8

      [ https://issues.jboss.org/browse/CDI-593?page=com.
 atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

 Antoine Sabot-Durand updated CDI-593:
 -------------------------------------
     Fix Version/s: 2.0 .Final
                        (was: 2.0 (discussion))

 > Mention javax.enterprise.inject.spi.Prioritized in spec text and
 improve its javadoc
 > ------------------------------------------------------------
 ------------------------
 >
 >                 Key: CDI-593
 >                 URL: https://issues.jboss.org/browse/CDI-593
 >             Project: CDI Specification Issues
 >          Issue Type: Clarification
 >            Reporter: Martin Kouba
 >             Fix For: 2.0 .Final
 >
 >
 > * javadoc would definitely deserve some more info
 > * the spec text should mention this interface as well and describe basic
 use cases (e.g. an interceptor passed to {{AfterBeanDiscovery.addBean()}}
 and  implementing this interface is globally enabled)

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 Message: 9
 Date: Fri, 7 Oct 2016 07:55:00 -0400 (EDT)
 From: "Antoine Sabot-Durand (JIRA)" <issues(a)jboss.org&gt;
 Subject: [cdi-dev] [JBoss JIRA] (CDI-592) Consider adding
         ObserverMethod.notify() method which also accepts EventMetadata
 To: cdi-dev(a)lists.jboss.org
 Message-ID:
         <JIRA.12611754.1458745510000.72436.1475841300410(a)Atlassian.JIRA&gt;
 Content-Type: text/plain; charset=UTF-8

      [ https://issues.jboss.org/browse/CDI-592?page=com.
 atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

 Antoine Sabot-Durand updated CDI-592:
 -------------------------------------
     Fix Version/s: 2.0 .Final
                        (was: 2.0 (discussion))

 > Consider adding ObserverMethod.notify() method which also accepts
 EventMetadata
 > ------------------------------------------------------------
 -------------------
 >
 >                 Key: CDI-592
 >                 URL: https://issues.jboss.org/browse/CDI-592
 >             Project: CDI Specification Issues
 >          Issue Type: Feature Request
 >          Components: Events
 >            Reporter: Martin Kouba
 >             Fix For: 2.0 .Final
 >
 >
 > {code:java}
 > // Make the original method also default so that new impls don't need to
 implement two methods
 > default void notify(T event) {
 >   // No-op
 > }
 > // The container should always call this method...
 > default void notify(T event, EventMetadata metadata) {
 >   notify(event);
 > }
 > {code}
 > This should not break existing implementations. The truth is a custom
 impl will not be forced to implement any {{notify()}} method. But I think
 the benefits are worth it.

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 ------------------------------

 Message: 10
 Date: Fri, 7 Oct 2016 07:59:00 -0400 (EDT)
 From: "Antoine Sabot-Durand (JIRA)" <issues(a)jboss.org&gt;
 Subject: [cdi-dev] [JBoss JIRA] (CDI-561) Add the possibility to
         unmanage a bean instance
 To: cdi-dev(a)lists.jboss.org
 Message-ID:
         <JIRA.12584980.1442331236000.72464.1475841540189(a)Atlassian.JIRA&gt;
 Content-Type: text/plain; charset=UTF-8

      [ https://issues.jboss.org/browse/CDI-561?page=com.
 atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

 Antoine Sabot-Durand updated CDI-561:
 -------------------------------------
     Fix Version/s: TBD
                        (was: 2.0 (discussion))

 > Add the possibility to unmanage a bean instance
 > -----------------------------------------------
 >
 >                 Key: CDI-561
 >                 URL: https://issues.jboss.org/browse/CDI-561
 >             Project: CDI Specification Issues
 >          Issue Type: Feature Request
 >          Components: Beans
 >    Affects Versions: 1.2.Final, 1.1.Final, 2.0-EDR1
 >            Reporter: Antoine Sabot-Durand
 >             Fix For: TBD
 >
 >
 > CDI implementations make heavy uses of proxies to support normal scope
 and interceptor decorators. There are use case where being able to have a
 bean instance without its proxy could be useful
 > * Accessing the true class of the instance in a clean way
 > * Being able to capture an instance state to use its information outside
 CDI or as an event payload
 > The limitation we have  on Async event is probably a good example. As we
 don't propagate active normal context at firing time, it's not possible to
 inject a bean with such a scope (except {{@ApplicationScoped}} since
 Application context is shared), it could be useful to give the possibility
 to copy such a bean instance to a standard pojo instance so it could be
 used as event payload for instance.
 > We could even imagine that the mechanism could be transparently
 activated if an asynchronous observer inject a {{@RequestScoped}} or
 {{@SessionScoped}} bean.

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Re: [cdi-dev] [JBoss JIRA] (CDI-633) Intoroduce BeanManager.event()