pekko/akka-remote/src/main/scala/akka/serialization/ProtobufSerializer.scala
Roland 2ce47d6bb5 Bye-bye ReflectiveAccess, introducing PropertyMaster, see #1750
- PropertyMaster is the only place in Akka which calls
  ClassLoader.getClass (apart from kernel, which might be special)
- all PropertyMaster methods (there are only three) take a ClassManifest
  of what is to be constructed, and they verify that the obtained object
  is actually compatible with the required type

Other stuff:
- noticed that I had forgotten to change to ExtendedActorSystem when
  constructing Extensions by ExtensionKey (damn you, reflection!)
- moved Serializer.currentSystem into JavaSerializer, because that’s the
  only one needing it (it’s only used in readResolve() methods)
- Serializers are constructed now with one-arg constructor taking
  ExtendedActorSystem (if that exists, otherwise no-arg as before), to
  allow JavaSerializer to do its magic; possibly necessary for others as
  well
- Removed all Option[ClassLoader] signatures
- made it so that the ActorSystem will try context class loader, then
  the class loader which loaded the class actually calling into
  ActorSystem.apply, then the loader which loaded ActorSystemImpl
- for the second of the above I added a (reflectively accessed hopefully
  safe) facility for getting caller Class[_] objects by using
  sun.reflect.Reflection; this is optional an defaults to None, e.g. on
  Android, which means that getting the caller’s classloader is done on
  a best effort basis (there’s nothing we can do because a StackTrace
  does not contain actual Class[_] objects).
- refactored DurableMailbox to contain the owner val and use that
  instead of declaring that in all subclasses
2012-02-09 11:56:43 +01:00

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Scala

/**
* Copyright (C) 2009-2012 Typesafe Inc. <http://www.typesafe.com>
*/
package akka.serialization
import com.google.protobuf.Message
import akka.actor.PropertyMaster
/**
* This Serializer serializes `com.google.protobuf.Message`s
*/
class ProtobufSerializer extends Serializer {
val ARRAY_OF_BYTE_ARRAY = Array[Class[_]](classOf[Array[Byte]])
def includeManifest: Boolean = true
def identifier = 2
def toBinary(obj: AnyRef): Array[Byte] = obj match {
case m: Message m.toByteArray
case _ throw new IllegalArgumentException("Can't serialize a non-protobuf message using protobuf [" + obj + "]")
}
def fromBinary(bytes: Array[Byte], clazz: Option[Class[_]]): AnyRef =
clazz match {
case None throw new IllegalArgumentException("Need a protobuf message class to be able to serialize bytes using protobuf")
case Some(c) c.getDeclaredMethod("parseFrom", ARRAY_OF_BYTE_ARRAY: _*).invoke(null, bytes).asInstanceOf[Message]
}
}