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

This example Akka source code file (CapacityLimitSpec.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, akkaspec, bind, capacitylimitspec, commandfailed, connect, error, io, tcpintegrationspecsupport, test, testing, testkit, testprobe, testsetup, the

The CapacityLimitSpec.scala Akka example source code

/**
 * Copyright (C) 2009-2014 Typesafe Inc. <http://www.typesafe.com>
 */

package akka.io

import akka.testkit.{ TestProbe, AkkaSpec }
import akka.TestUtils._
import Tcp._

class CapacityLimitSpec extends AkkaSpec("""
    akka.loglevel = ERROR
    akka.io.tcp.max-channels = 4
    akka.actor.serialize-creators = on
    """)
  with TcpIntegrationSpecSupport {

  "The TCP transport implementation" should {

    "reply with CommandFailed to a Bind or Connect command if max-channels capacity has been reached" in new TestSetup {
      establishNewClientConnection()

      // we now have three channels registered: a listener, a server connection and a client connection
      // so register one more channel
      val commander = TestProbe()
      val addresses = temporaryServerAddresses(2)
      commander.send(IO(Tcp), Bind(bindHandler.ref, addresses(0)))
      commander.expectMsg(Bound(addresses(0)))

      // we are now at the configured max-channel capacity of 4

      val bindToFail = Bind(bindHandler.ref, addresses(1))
      commander.send(IO(Tcp), bindToFail)
      commander.expectMsgType[CommandFailed].cmd should be theSameInstanceAs (bindToFail)

      val connectToFail = Connect(endpoint)
      commander.send(IO(Tcp), connectToFail)
      commander.expectMsgType[CommandFailed].cmd should be theSameInstanceAs (connectToFail)
    }

  }

}