[JBoss JIRA] (CDI-271) Provide a way to inject Event metadata into an observer method
by Arne Limburg (JIRA)
[ https://issues.jboss.org/browse/CDI-271?page=com.atlassian.jira.plugin.sy... ]
Arne Limburg edited comment on CDI-271 at 2/22/13 8:54 AM:
-----------------------------------------------------------
~meetoblivion No, getAnnotated() and getMember() have completely different semantics. Both represent the target of the injection. The BeanManager is the source...
was (Author: arnelim):
No, getAnnotated() and getMember() have completely different semantics. Both represent the target of the injection. The BeanManager is the source...
> Provide a way to inject Event metadata into an observer method
> --------------------------------------------------------------
>
> Key: CDI-271
> URL: https://issues.jboss.org/browse/CDI-271
> Project: CDI Specification Issues
> Issue Type: Feature Request
> Components: Events
> Reporter: Arne Limburg
> Assignee: Arne Limburg
> Fix For: 1.1.PFD
>
>
> Currently there is no way for observer methods to access the qualifiers of the fired event (i.e. to access @Nonbinding members).
> Consider the following example:
> {code}
> @Inject @MyQualifier
> Event<MyObject> event;
> public void fireEvent(MyObject object, MyTypeValue type) {
> event.select(new MyTypeAnnotationLiteral(type)).fire(object);
> }
> {code}
> Currently no observer can receive the value of MyTypeValue. I suggest to introduce an interface AnnotatedEvent that extends Annotated and contains this information. It then could be injected via the InjectionPoint like this:
> {code}
> public void observeEvent(@Observes @MyType MyObject object, InjectionPoint ip) {
> MyType annotation = ip.getAnnotated().getAnnotation(MyType.class);
> MyTypeValue value = annotation.value();
> ...
> }
> {code}
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11 years, 7 months
[JBoss JIRA] (CDI-271) Provide a way to inject Event metadata into an observer method
by Pete Muir (JIRA)
[ https://issues.jboss.org/browse/CDI-271?page=com.atlassian.jira.plugin.sy... ]
Pete Muir commented on CDI-271:
-------------------------------
It's for both injections and events.
> Provide a way to inject Event metadata into an observer method
> --------------------------------------------------------------
>
> Key: CDI-271
> URL: https://issues.jboss.org/browse/CDI-271
> Project: CDI Specification Issues
> Issue Type: Feature Request
> Components: Events
> Reporter: Arne Limburg
> Assignee: Arne Limburg
> Fix For: 1.1.PFD
>
>
> Currently there is no way for observer methods to access the qualifiers of the fired event (i.e. to access @Nonbinding members).
> Consider the following example:
> {code}
> @Inject @MyQualifier
> Event<MyObject> event;
> public void fireEvent(MyObject object, MyTypeValue type) {
> event.select(new MyTypeAnnotationLiteral(type)).fire(object);
> }
> {code}
> Currently no observer can receive the value of MyTypeValue. I suggest to introduce an interface AnnotatedEvent that extends Annotated and contains this information. It then could be injected via the InjectionPoint like this:
> {code}
> public void observeEvent(@Observes @MyType MyObject object, InjectionPoint ip) {
> MyType annotation = ip.getAnnotated().getAnnotation(MyType.class);
> MyTypeValue value = annotation.value();
> ...
> }
> {code}
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[JBoss JIRA] (CDI-271) Provide a way to inject Event metadata into an observer method
by John Ament (JIRA)
[ https://issues.jboss.org/browse/CDI-271?page=com.atlassian.jira.plugin.sy... ]
John Ament edited comment on CDI-271 at 2/22/13 8:48 AM:
---------------------------------------------------------
I like CallerAttributes, but would this be just for Events? If so wouldn't EventAttributes make sense?
@Arne - why would getMember and getAnnotated return null? Wouldn't getMember be the BeanManager and getAnnotated also be the BeanManager?
was (Author: meetoblivion):
I like CallerAttributes, but would this be just for Events? If so wouldn't EventAttributes make sense?
> Provide a way to inject Event metadata into an observer method
> --------------------------------------------------------------
>
> Key: CDI-271
> URL: https://issues.jboss.org/browse/CDI-271
> Project: CDI Specification Issues
> Issue Type: Feature Request
> Components: Events
> Reporter: Arne Limburg
> Assignee: Arne Limburg
> Fix For: 1.1.PFD
>
>
> Currently there is no way for observer methods to access the qualifiers of the fired event (i.e. to access @Nonbinding members).
> Consider the following example:
> {code}
> @Inject @MyQualifier
> Event<MyObject> event;
> public void fireEvent(MyObject object, MyTypeValue type) {
> event.select(new MyTypeAnnotationLiteral(type)).fire(object);
> }
> {code}
> Currently no observer can receive the value of MyTypeValue. I suggest to introduce an interface AnnotatedEvent that extends Annotated and contains this information. It then could be injected via the InjectionPoint like this:
> {code}
> public void observeEvent(@Observes @MyType MyObject object, InjectionPoint ip) {
> MyType annotation = ip.getAnnotated().getAnnotation(MyType.class);
> MyTypeValue value = annotation.value();
> ...
> }
> {code}
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11 years, 7 months
[JBoss JIRA] (CDI-271) Provide a way to inject Event metadata into an observer method
by John Ament (JIRA)
[ https://issues.jboss.org/browse/CDI-271?page=com.atlassian.jira.plugin.sy... ]
John Ament commented on CDI-271:
--------------------------------
I like CallerAttributes, but would this be just for Events? If so wouldn't EventAttributes make sense?
> Provide a way to inject Event metadata into an observer method
> --------------------------------------------------------------
>
> Key: CDI-271
> URL: https://issues.jboss.org/browse/CDI-271
> Project: CDI Specification Issues
> Issue Type: Feature Request
> Components: Events
> Reporter: Arne Limburg
> Assignee: Arne Limburg
> Fix For: 1.1.PFD
>
>
> Currently there is no way for observer methods to access the qualifiers of the fired event (i.e. to access @Nonbinding members).
> Consider the following example:
> {code}
> @Inject @MyQualifier
> Event<MyObject> event;
> public void fireEvent(MyObject object, MyTypeValue type) {
> event.select(new MyTypeAnnotationLiteral(type)).fire(object);
> }
> {code}
> Currently no observer can receive the value of MyTypeValue. I suggest to introduce an interface AnnotatedEvent that extends Annotated and contains this information. It then could be injected via the InjectionPoint like this:
> {code}
> public void observeEvent(@Observes @MyType MyObject object, InjectionPoint ip) {
> MyType annotation = ip.getAnnotated().getAnnotation(MyType.class);
> MyTypeValue value = annotation.value();
> ...
> }
> {code}
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11 years, 7 months
[JBoss JIRA] (CDI-271) Provide a way to inject Event metadata into an observer method
by Arne Limburg (JIRA)
[ https://issues.jboss.org/browse/CDI-271?page=com.atlassian.jira.plugin.sy... ]
Arne Limburg commented on CDI-271:
----------------------------------
I don't think we need a superclass.
Imho, we just should define that getMember() and getAnnotated() return null when coming from BM.
> Provide a way to inject Event metadata into an observer method
> --------------------------------------------------------------
>
> Key: CDI-271
> URL: https://issues.jboss.org/browse/CDI-271
> Project: CDI Specification Issues
> Issue Type: Feature Request
> Components: Events
> Reporter: Arne Limburg
> Assignee: Arne Limburg
> Fix For: 1.1.PFD
>
>
> Currently there is no way for observer methods to access the qualifiers of the fired event (i.e. to access @Nonbinding members).
> Consider the following example:
> {code}
> @Inject @MyQualifier
> Event<MyObject> event;
> public void fireEvent(MyObject object, MyTypeValue type) {
> event.select(new MyTypeAnnotationLiteral(type)).fire(object);
> }
> {code}
> Currently no observer can receive the value of MyTypeValue. I suggest to introduce an interface AnnotatedEvent that extends Annotated and contains this information. It then could be injected via the InjectionPoint like this:
> {code}
> public void observeEvent(@Observes @MyType MyObject object, InjectionPoint ip) {
> MyType annotation = ip.getAnnotated().getAnnotation(MyType.class);
> MyTypeValue value = annotation.value();
> ...
> }
> {code}
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11 years, 7 months
[JBoss JIRA] (CDI-321) Application wide CDI enablement
by Pete Muir (JIRA)
Pete Muir created CDI-321:
-----------------------------
Summary: Application wide CDI enablement
Key: CDI-321
URL: https://issues.jboss.org/browse/CDI-321
Project: CDI Specification Issues
Issue Type: Bug
Reporter: Pete Muir
Assignee: Pete Muir
Fix For: 1.1.PFD
We introduce the concept of a "bean defining annotation" and define that any class in any deployment (including those with no beans.xml) with a bean defining annotation is discovered and may be a CDI bean, and can participate fully in the application. Any archive with a beans.xml continues to work in the same way, such that all classes in the archive are discovered and may be CDI beans.
This addresses the startup time problem. Whilst a scan of classes is still required, the impact on startup time is negligible:
* A Java EE server must scan all classes to discover other component defining annotations such as EJBs, Servlet's, JAX-RS resources etc.
* This scan can be done at the bytecode level, with no need to classload the class, which our research shows is the costly part of CDI startup
Any scope (normal scope or pseudo-scope) applied to a bean at source level is a bean defining annotation (so you must add @Dependent to your class in order to get it to be picked up as a dependent bean).
Only classes with a bean defining annotation, or with an annotation, or meta-annotation, present specified by @WithAnnotations are passed to ProcessAnnotatedType observers (the exact semantics are defined by CDI 1.1 PRD for @WithAnnotations). As mentioned above, if a ProcessAnnotatedType is observed for a type without a bean defining annotation, as a result of having an annotation present that is specified by @WithAnnotations, it may instruct the container to add discover the class as a bean.
Every archive in a deployment would be considered a bean archive, simply with differing contents depending on the presence of beans.xml
If a developer adds a beans.xml to their archive, behavior is as CDI 1.0. We will add an attribute to beans.xml "auto-discover=true", which the user may set to false in order to add a beans.xml and only have classes with a bean defining annotation discovered, which allows beans.xml to be used as a deployment descriptor but still limit the classes discovered.
OPEN ISSUE: Should auto-discover be false by default for beans.xml with version 1.1. This would mean that adding a beans.xml would have no impact on discovery for 1.1 apps, however it is a significant change from 1.0.
OPEN ISSUE: Should only scopes for which a CDI context exists be considered component defining? This could introduce some thorny edge cases, but would address the JSR-330 compatibility issue better.
OPEN ISSUE: Should we extend auto-discover in beans.xml to allow complete disablement of scanning e.g. auto-discover="all|bean-defining-annotations-only|none" ?
OPEN ISSUE: How should the ProcessAnnotatedType event instruct the container to discover a class as a bean? Perhaps something like event.discover(clazz)?
OPEN ISSUE: Should we integrate this with the package level scanning control we have proposed for CDI 1.1?
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11 years, 7 months
[JBoss JIRA] (CDI-271) Provide a way to inject Event metadata into an observer method
by Pete Muir (JIRA)
[ https://issues.jboss.org/browse/CDI-271?page=com.atlassian.jira.plugin.sy... ]
Pete Muir commented on CDI-271:
-------------------------------
I can extract a superclass if desired, and we can agree on a name - CallerAttributes?
I'll add how this works when coming from BM.
> Provide a way to inject Event metadata into an observer method
> --------------------------------------------------------------
>
> Key: CDI-271
> URL: https://issues.jboss.org/browse/CDI-271
> Project: CDI Specification Issues
> Issue Type: Feature Request
> Components: Events
> Reporter: Arne Limburg
> Assignee: Arne Limburg
> Fix For: 1.1.PFD
>
>
> Currently there is no way for observer methods to access the qualifiers of the fired event (i.e. to access @Nonbinding members).
> Consider the following example:
> {code}
> @Inject @MyQualifier
> Event<MyObject> event;
> public void fireEvent(MyObject object, MyTypeValue type) {
> event.select(new MyTypeAnnotationLiteral(type)).fire(object);
> }
> {code}
> Currently no observer can receive the value of MyTypeValue. I suggest to introduce an interface AnnotatedEvent that extends Annotated and contains this information. It then could be injected via the InjectionPoint like this:
> {code}
> public void observeEvent(@Observes @MyType MyObject object, InjectionPoint ip) {
> MyType annotation = ip.getAnnotated().getAnnotation(MyType.class);
> MyTypeValue value = annotation.value();
> ...
> }
> {code}
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11 years, 7 months
[JBoss JIRA] (CDI-271) Provide a way to inject Event metadata into an observer method
by Jozef Hartinger (JIRA)
[ https://issues.jboss.org/browse/CDI-271?page=com.atlassian.jira.plugin.sy... ]
Jozef Hartinger commented on CDI-271:
-------------------------------------
Furthermore the spec does not currently define the behaviour of other InjectionPoint methods besides getType() and getQualifiers(). For example getMember(), getAnnotated(), etc. are well defined when the InjectionPoint represents an Instance but not for Event.
> Provide a way to inject Event metadata into an observer method
> --------------------------------------------------------------
>
> Key: CDI-271
> URL: https://issues.jboss.org/browse/CDI-271
> Project: CDI Specification Issues
> Issue Type: Feature Request
> Components: Events
> Reporter: Arne Limburg
> Assignee: Arne Limburg
> Fix For: 1.1.PFD
>
>
> Currently there is no way for observer methods to access the qualifiers of the fired event (i.e. to access @Nonbinding members).
> Consider the following example:
> {code}
> @Inject @MyQualifier
> Event<MyObject> event;
> public void fireEvent(MyObject object, MyTypeValue type) {
> event.select(new MyTypeAnnotationLiteral(type)).fire(object);
> }
> {code}
> Currently no observer can receive the value of MyTypeValue. I suggest to introduce an interface AnnotatedEvent that extends Annotated and contains this information. It then could be injected via the InjectionPoint like this:
> {code}
> public void observeEvent(@Observes @MyType MyObject object, InjectionPoint ip) {
> MyType annotation = ip.getAnnotated().getAnnotation(MyType.class);
> MyTypeValue value = annotation.value();
> ...
> }
> {code}
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11 years, 7 months
[JBoss JIRA] (CDI-271) Provide a way to inject Event metadata into an observer method
by Jozef Hartinger (JIRA)
[ https://issues.jboss.org/browse/CDI-271?page=com.atlassian.jira.plugin.sy... ]
Jozef Hartinger commented on CDI-271:
-------------------------------------
{quote}Well, this is the same like with ProducerMethods which have an InjectionPoint but only got triggered by BeanManager#getReference(), right?{quote}
Right. I was just surprised that the functionality disappeared compared to the previously proposed solution (ObserverMethod.notify(event, qualifiers)) where qualifiers would be available always.
> Provide a way to inject Event metadata into an observer method
> --------------------------------------------------------------
>
> Key: CDI-271
> URL: https://issues.jboss.org/browse/CDI-271
> Project: CDI Specification Issues
> Issue Type: Feature Request
> Components: Events
> Reporter: Arne Limburg
> Assignee: Arne Limburg
> Fix For: 1.1.PFD
>
>
> Currently there is no way for observer methods to access the qualifiers of the fired event (i.e. to access @Nonbinding members).
> Consider the following example:
> {code}
> @Inject @MyQualifier
> Event<MyObject> event;
> public void fireEvent(MyObject object, MyTypeValue type) {
> event.select(new MyTypeAnnotationLiteral(type)).fire(object);
> }
> {code}
> Currently no observer can receive the value of MyTypeValue. I suggest to introduce an interface AnnotatedEvent that extends Annotated and contains this information. It then could be injected via the InjectionPoint like this:
> {code}
> public void observeEvent(@Observes @MyType MyObject object, InjectionPoint ip) {
> MyType annotation = ip.getAnnotated().getAnnotation(MyType.class);
> MyTypeValue value = annotation.value();
> ...
> }
> {code}
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11 years, 7 months
[JBoss JIRA] (CDI-271) Provide a way to inject Event metadata into an observer method
by Arne Limburg (JIRA)
[ https://issues.jboss.org/browse/CDI-271?page=com.atlassian.jira.plugin.sy... ]
Arne Limburg commented on CDI-271:
----------------------------------
You both are right, but that seems to be a completely different issue, isn't it?
> Provide a way to inject Event metadata into an observer method
> --------------------------------------------------------------
>
> Key: CDI-271
> URL: https://issues.jboss.org/browse/CDI-271
> Project: CDI Specification Issues
> Issue Type: Feature Request
> Components: Events
> Reporter: Arne Limburg
> Assignee: Arne Limburg
> Fix For: 1.1.PFD
>
>
> Currently there is no way for observer methods to access the qualifiers of the fired event (i.e. to access @Nonbinding members).
> Consider the following example:
> {code}
> @Inject @MyQualifier
> Event<MyObject> event;
> public void fireEvent(MyObject object, MyTypeValue type) {
> event.select(new MyTypeAnnotationLiteral(type)).fire(object);
> }
> {code}
> Currently no observer can receive the value of MyTypeValue. I suggest to introduce an interface AnnotatedEvent that extends Annotated and contains this information. It then could be injected via the InjectionPoint like this:
> {code}
> public void observeEvent(@Observes @MyType MyObject object, InjectionPoint ip) {
> MyType annotation = ip.getAnnotated().getAnnotation(MyType.class);
> MyTypeValue value = annotation.value();
> ...
> }
> {code}
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11 years, 7 months