Inline
On Sat, Dec 27, 2014 at 4:26 PM, Mark Struberg <[email protected]> wrote:
> Hi Anatole!
>
> First of all thanks for sharing this sample. You might know your use cases
> but others don't.
>
>
>
>
> I assume that all this PropertySource construction is done at a single
> point, e.g. a producer metho
>
> Let me ask a few questions:
>
> 1.) How do you know which ConfigSources exist in the project? You might be
> one jar in a dozen ones, having no control over them?
>
> 2.) In DeltaSpike each property file could define it's own ordinal with a
> simple entry in the property file. That way you can just add a JAR which
> overrides a default config from another jar. Would each of them get an own
> name? Or do they all share the same name and priority?
>
> 3.) How do you deal with modularity? E.g. adding a dependency which needs
> some other ConfigSource but knows nothing about your code?
>
> 4.) Another modularity question: What about having multiple jars
> (different independent framework parts) and each of them likes to have
> another PropertySouceBuilder configuration?
>
1-4 are valid questions. While it is only about to begin and may not affect
Java for a while, let's keep an eye on a more modular JVM, too at least
from Java 9 onward.
>
> 5.) How do you allow containers and framework programmers to add
> PropertySources which affect all the project?
>
>
> 6.)
>
> > - you can override along the classloader hierarchy (system, ear, war)
>
> > by adding resources to the classpath at xxx.Usually this does not work
> well as e.g. all the JARs in WEB-INF/lib have exactly the same 'level'.
> It's totally up to the ClassLoader mechanism in which order you get them.
> And that could change on every restart. Been there, done that - doesn't
> work.
>
>
> 7.)
> > In code the do simply: Configuration config =
> > Configuration.current("Stephen");
> And what if another jar does Configuration.current("Giovanni")?
> Imo that approach doesn't scale.
>
>
>
IMHO there can only be one current() otherwise the name makes no sense.
See CDI *current
<http://docs.jboss.org/cdi/api/1.1/javax/enterprise/inject/spi/CDI.html#current()>*
()
Get the CDI instance that provides access to the current
container.
CDI has no current("Giovanni") or current("Francis") either ;-)
Werner
