[cdi-dev] [JBoss JIRA] (CDI-653) Introduce BeanManager#getInstances() to ease instance resolution in custom SPI

[Antoine Sabot-Durand (JIRA)]

Antoine Sabot-Durand created CDI-653:
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             Summary: Introduce BeanManager#getInstances() to ease instance resolution in custom SPI
                 Key: CDI-653
                 URL: https://issues.jboss.org/browse/CDI-653
             Project: CDI Specification Issues
          Issue Type: Feature Request
            Reporter: Antoine Sabot-Durand


Right now if you need a bean instance in one of your extension or custom SPI (i.e. instance of Bean A is needed to create Bean B) you have to write something like

{code:java}
Set<Bean<?>> beanSet = beanManager.getBeans(MyClass.class);
Bean<?> bean = beanManager.resolve(beanSet);
MyClass instance = (MyClass) beanManager.getReference(bean, MyClass.class, beanManager.createCreationalContext(bean));
{code}

While it can be useful to get thru all this step of type safe resolution, a typical use case is: I need this contextual instance (or these contextual instances) to do conditional action according to its state.

So providing a Bean Manager method returning an {{Instance<Object>}} could be a short cut that could help a lot of advanced developers:

{code:java}
beanManager.getInstances().select(MyClass.class).get();
{code}





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