jdi connection sample

Build.scala

import sbt._
import Keys._

object MyBuild extends Build {
  lazy val root = Project("root", file("."),
    settings = Project.defaultSettings ++ Seq(
      version := "0.1",
      scalaVersion := "2.9.2",
      libraryDependencies ++= Nil,
      unmanagedJars in Compile <+= (javaHome) map { javaHome =>
        Attributed.blank(javaHome.getOrElse(file(System.getProperty("java.home"))) / "lib" / "tools.jar")
      }
    )
  )
}

Main.scala

import com.sun.jdi._
import com.sun.jdi.connect._
import com.sun.jdi.connect.Connector._

import scala.collection.JavaConversions._

object Debugger extends App {
  val vm = connect("localhost", 8009).get
  val threads = vm.allThreads
  println(threads)

  def connect(host: String, port: Int): Option[VirtualMachine] = {
    val vmm = Bootstrap.virtualMachineManager
    vmm.attachingConnectors.find(_.name == "com.sun.jdi.SocketAttach").map { attachingConnector =>
      val arg = attachingConnector.defaultArguments
      arg.get("port").asInstanceOf[IntegerArgument].setValue(port)
      arg.get("hostname").setValue(host)
      attachingConnector.attach(arg)
    }
  }
}

-Xrunjdwp:transport=dt_socket,address=8009,server=y,suspend=n