scala - Can Scala be used with Service Component Architecture?

Question

Does anyone know if Scala can be used with SCA (Service Component Architecture) open source implementations such as Fabric3 or Apache Tuscany? I found no such information online. I know Scala compiles to Java, but I was wondering if dependency injection would complicate things. Thanks.

Answer 1

FraSCAti平台已经支持 Scala作为SCA 组件的实现语言。您可以查看以下示例：

@Service
trait PrintService {
    def print(msg: String)
}

class Server extends PrintService {    
    println("SERVER created.")

    @Property protected var header = "->"
    @Property private var count = 1

    /** PrintService implementation. */
    def print(msg: String) {
        println("Server: begin printing...")
        for (i <- 0 until count)
            println(header + msg)
        println("Server: print done.")
    }        
}

@Service(classOf[Runnable])
class Client extends Runnable {
    println("CLIENT created")

    @Reference(required = true) private var service: PrintService = _
    def setPrintService(s: PrintService) { service = s }

    // Runnable interface implementation
    def run = service print "hello world"
}

存储库中的示例还说明了如何使用 bean 来实现这些组件。