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DOC: Extension sample for application specific settings. See #1702

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* Added sample and documentation for how to create extension for application specific config
* Simplified java usage of ExtensionIdProvider, more aligned with how it is done in scala
This commit is contained in:
Patrik Nordwall 2012-01-20 11:30:33 +01:00
parent 642dd9c28a
commit 05d4a6ed38
11 changed files with 345 additions and 119 deletions
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75
akka-docs/scala/code/akka/docs/extension/ExtensionDocSpec.scala
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@ -3,16 +3,13 @@
*/
package akka.docs.extension
import org.scalatest.WordSpec
import org.scalatest.matchers.MustMatchers
//#imports
import akka.actor._
import java.util.concurrent.atomic.AtomicLong
//#imports
import akka.actor.Actor
import akka.testkit.AkkaSpec
//#extension
import akka.actor.Extension
class CountExtensionImpl extends Extension {
//Since this Extension is a shared instance
// per ActorSystem we need to be threadsafe
@ -24,6 +21,10 @@ class CountExtensionImpl extends Extension {
//#extension
//#extensionid
import akka.actor.ExtensionId
import akka.actor.ExtensionIdProvider
import akka.actor.ActorSystemImpl
object CountExtension
extends ExtensionId[CountExtensionImpl]
with ExtensionIdProvider {
@ -39,39 +40,37 @@ object CountExtension
}
//#extensionid
//#extension-usage-actor
import akka.actor.Actor
object ExtensionDocSpec {
//#extension-usage-actor
class MyActor extends Actor {
def receive = {
case someMessage ⇒
CountExtension(context.system).increment()
}
}
//#extension-usage-actor
//#extension-usage-actor-trait
import akka.actor.Actor
trait Counting { self: Actor ⇒
def increment() = CountExtension(context.system).increment()
}
class MyCounterActor extends Actor with Counting {
def receive = {
case someMessage ⇒ increment()
}
}
//#extension-usage-actor-trait
class ExtensionDocSpec extends WordSpec with MustMatchers {
"demonstrate how to create an extension in Scala" in {
val system: ActorSystem = null
intercept[Exception] {
//#extension-usage
CountExtension(system).increment
//#extension-usage
class MyActor extends Actor {
def receive = {
case someMessage ⇒
CountExtension(context.system).increment()
}
}
//#extension-usage-actor
//#extension-usage-actor-trait
trait Counting { self: Actor ⇒
def increment() = CountExtension(context.system).increment()
}
class MyCounterActor extends Actor with Counting {
def receive = {
case someMessage ⇒ increment()
}
}
//#extension-usage-actor-trait
}
class ExtensionDocSpec extends AkkaSpec {
import ExtensionDocSpec._
"demonstrate how to create an extension in Scala" in {
//#extension-usage
CountExtension(system).increment
//#extension-usage
}
}