Akka/Scala example source code file (OSGi.scala)

This example Akka source code file (OSGi.scala) is included in my "Source Code Warehouse" project. The intent of this project is to help you more easily find Akka and Scala source code examples by using tags.

All credit for the original source code belongs to akka.io; I'm just trying to make examples easier to find. (For my Scala work, see my Scala examples and tutorials.)

Akka tags/keywords

akka, compile, nil, option, osgi, seq, string

The OSGi.scala Akka example source code

package akka

import com.typesafe.sbt.osgi.SbtOsgi._
import sbt._
import sbt.Keys._

object OSGi {

  val Seq(scalaEpoch, scalaMajor) = """(\d+)\.(\d+)\..*""".r.unapplySeq(Dependencies.Versions.scalaVersion).get.map(_.toInt)

  // The included osgiSettings that creates bundles also publish the jar files
  // in the .../bundles directory which makes testing locally published artifacts
  // a pain. Create bundles but publish them to the normal .../jars directory.
  def osgiSettings = defaultOsgiSettings ++ Seq(
    packagedArtifact in (Compile, packageBin) <<= (artifact in (Compile, packageBin), OsgiKeys.bundle).identityMap
  )

  val actor = osgiSettings ++ Seq(
    OsgiKeys.exportPackage := Seq("akka*"),
    OsgiKeys.privatePackage := Seq("akka.osgi.impl"),
    //akka-actor packages are not imported, as contained in the CP
    OsgiKeys.importPackage := (osgiOptionalImports map optionalResolution) ++ Seq("!sun.misc", scalaImport(), configImport(), "*"),
    // dynamicImportPackage needed for loading classes defined in configuration
    OsgiKeys.dynamicImportPackage := Seq("*")
  )

  val agent = exports(Seq("akka.agent.*"))

  val camel = exports(Seq("akka.camel.*"))

  val cluster = exports(Seq("akka.cluster.*"), imports = Seq(protobufImport()))

  val osgi = exports(Seq("akka.osgi.*"))

  val osgiDiningHakkersSampleApi = exports(Seq("akka.sample.osgi.api"))

  val osgiDiningHakkersSampleCommand = osgiSettings ++ Seq(OsgiKeys.bundleActivator := Option("akka.sample.osgi.command.Activator"), OsgiKeys.privatePackage := Seq("akka.sample.osgi.command"))

  val osgiDiningHakkersSampleCore = exports(Seq("")) ++ Seq(OsgiKeys.bundleActivator := Option("akka.sample.osgi.activation.Activator"), OsgiKeys.privatePackage := Seq("akka.sample.osgi.internal", "akka.sample.osgi.activation", "akka.sample.osgi.service"))

  val osgiDiningHakkersSampleUncommons = exports(Seq("org.uncommons.maths.random")) ++ Seq(OsgiKeys.privatePackage := Seq("org.uncommons.maths.binary", "org.uncommons.maths", "org.uncommons.maths.number"))

  val remote = exports(Seq("akka.remote.*"), imports = Seq(protobufImport()))

  val slf4j = exports(Seq("akka.event.slf4j.*"))

  val persistence = exports(Seq("akka.persistence.*"), imports = Seq(protobufImport()))

  val testkit = exports(Seq("akka.testkit.*"))

  val zeroMQ = exports(Seq("akka.zeromq.*"), imports = Seq(protobufImport()) )

  val osgiOptionalImports = Seq(
    // needed because testkit is normally not used in the application bundle,
    // but it should still be included as transitive dependency and used by BundleDelegatingClassLoader
    // to be able to find refererence.conf
    "akka.testkit",
    "com.google.protobuf")

  def exports(packages: Seq[String] = Seq(), imports: Seq[String] = Nil) = osgiSettings ++ Seq(
    OsgiKeys.importPackage := imports ++ defaultImports,
    OsgiKeys.exportPackage := packages
  )
  def defaultImports = Seq("!sun.misc", akkaImport(), configImport(), scalaImport(), "*")
  def akkaImport(packageName: String = "akka.*") = versionedImport(packageName, "2.4", "2.5")
  def configImport(packageName: String = "com.typesafe.config.*") = versionedImport(packageName, "1.2.0", "1.3.0")
  def protobufImport(packageName: String = "com.google.protobuf.*") = versionedImport(packageName, "2.5.0", "2.6.0")
  def scalaImport(packageName: String = "scala.*") = versionedImport(packageName, s"$scalaEpoch.$scalaMajor", s"$scalaEpoch.${scalaMajor+1}")
  def optionalResolution(packageName: String) = "%s;resolution:=optional".format(packageName)
  def versionedImport(packageName: String, lower: String, upper: String) = s"""$packageName;version="[$lower,$upper)""""
}