gistfile1.scala

  def createContext = {
    ContextBuilder.newBuilder(new AWSEC2ProviderMetadata)
      .credentials("<>", "<>")
      .buildView(classOf[AWSEC2ComputeServiceContext])
      .unwrap(classOf[RestContext[AWSEC2Client, AWSEC2AsyncClient]])
  }

  implicit def syncApi = createContext.getApi

  def createInstance(imageId: String, hwType: String, group: String, key: String)(implicit c: AWSEC2Client, region: String = null) = {
    val opts = AWSRunInstancesOptions.Builder.asType(hwType).withSecurityGroup(group).withKeyName(key)
    val instances = c.getInstanceServices.runInstancesInRegion(region,null,imageId,1,1,opts)
    instances.headOption
  }

  def destroyInstance(id: String)(implicit c: AWSEC2Client, region: String = null) = {
    val instances = c.getInstanceServices.terminateInstancesInRegion(region, id)
    instances.headOption
  }

  def runningInstance(id: String)(implicit c: AWSEC2Client, region: String = null): Option[RunningInstance] = {
    val instance = c.getInstanceServices.describeInstancesInRegion(region, id).headOption
    for {
      i <- instance
      runningInstance <- i.headOption
    } yield runningInstance
  }