[Scala] Jersey with Scala + Jetty

Jersey は JAX-RS (Java API for RESTful Web Service)のreference実装です。
これをScalaで動かしてみます。

1. Libraries : Jetty 6.1.17. Jersey 1.0.3 を使用しました。下記をEclipseプロジェクトのreference librariesに登録

Jetty : jetty-XX.jar, jetty-util-XX.jar, servlet-api-XX.jar
Jersey : jsr311-api-XX.jar, jersey-core-XX.jar, jersey-server-XX.jar, asm-XX.jar

2. test.jersey.JerseyTest.scala : メインルーチンです

package test.jersey

import javax.servlet.ServletException
import javax.servlet.http.HttpServlet
import javax.servlet.http.HttpServletRequest
import javax.servlet.http.HttpServletResponse

import org.mortbay.jetty.Server
import org.mortbay.jetty.nio.SelectChannelConnector
import org.mortbay.jetty.servlet.Context
import org.mortbay.jetty.servlet.ServletHolder

import com.sun.jersey.spi.container.servlet.ServletContainer
  
object JerseyTest {
  def main(args: Array[String]) {
    val server = new Server(8080)
    val connector = new SelectChannelConnector()
    server.addConnector(connector)
    
    val holder:ServletHolder = new ServletHolder(classOf[ServletContainer])
    holder.setInitParameter(
      "com.sun.jersey.config.property.resourceConfigClass",
      "com.sun.jersey.api.core.PackagesResourceConfig")
    holder.setInitParameter(
      "com.sun.jersey.config.property.packages",
      "test.jersey.resource")
// URLをクラスにマッピングする為のpackage名

    val context = new Context(server, "/", Context.SESSIONS)
    context.addServlet(holder, "/*")
    
    server.start()
    server.join()
  }
}

3. test.jersey.resource : /helloworld に対応するリソース

package test.jersey.resource

import javax.ws.rs.GET
import javax.ws.rs.Produces
import javax.ws.rs.Path

@Path("/helloworld")
class HelloWorldResource {
  @GET
  @Produces(Array("text/plain"))
  def getMessage:String = "Hello, World"
}

4. テスト
Eclipseでtest.jersey.JerseyTest をアプリケーションとして実行させます。

2009-05-03 22:56:18.064::INFO:  Logging to STDERR via org.mortbay.log.StdErrLog
2009-05-03 22:56:18.123::INFO:  jetty-6.1.17
2009-05-03 22:56:18.205::INFO:  Started SocketConnector@0.0.0.0:8080
2009-05-03 22:56:18.226::INFO:  Started SelectChannelConnector@0.0.0.0:55736

次いでアクセス

% telnet localhost 8080
Trying 127.0.0.1...
Connected to localhost.
Escape character is '^]'.
GET /helloworld HTTP/1.0

HTTP/1.1 200 OK
Content-Type: text/plain
Server: Jetty(6.1.17)

Hello, WorldConnection closed by foreign host.
% 

2009/05/03 22:57:08 com.sun.jersey.api.core.PackagesResourceConfig init
情報: Scanning for root resource and provider classes in the packages:
  test.jersey.resource
2009/05/03 22:57:08 com.sun.jersey.api.core.PackagesResourceConfig init
情報: Root resource classes found:
  class test.jersey.resource.HelloWorldResource
2009/05/03 22:57:08 com.sun.jersey.api.core.PackagesResourceConfig init
情報: Provider classes found: