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POUsing DI in application written in Scala and Java - is it possible in "Scala way" - without additional framework?
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2011-01-14T11:15:20.150
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2011-05-18T01:59:00.140
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I have an application written partially in Java and Scala. In case of Scala code I want to use scala features to make dependency injection. In old Java code spring was used i.e. to inject services beans to wicket pages etc. In scala code I use selfless trait pattern to create services as described here: <a href="http://www.artima.com/scalazine/articles/selfless_trait_pattern.html" rel="nofollow">http://www.artima.com/scalazine/articles/selfless_trait_pattern.html</a> Dependency injection in scala is done currently using "Configuration" object which wires everything together: <pre><code>scala> trait Friendly { | def greet() { println("hi there") } | } defined trait Friendly scala> object Friendly extends Friendly defined module Friendly scala> object ServiceConsumer { | def myService: Friendly = myServiceInjected.getOrElse(throw new RuntimeException("dependency not injected")) | var myServiceInjected: Option[Friendly] = None | } defined module ServiceConsumer scala> class ServiceConsumer { | def callService() { | ServiceConsumer.myService.greet() | } | } defined class ServiceConsumer scala> object Configuration { | def init() { | ServiceConsumer.myServiceInjected = Some(Friendly) | } | } defined module Configuration scala> Configuration.init scala> val c = new ServiceConsumer c: ServiceConsumer = ServiceConsumer@292e2fba scala> c.callService() hi there </code></pre> But how to use "Friendly" service from Java class? Should I still use Spring? How to publish Friendly service written in Scala as a Spring bean? 
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<spring><scala><dependency-injection>
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Using DI in application written in Scala and Java - is it possible in "Scala way" - without additional framework?
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