Optimize remote serialization for the create from class case. See #1755

* Added FromClassCreator as special Function0 to be able to serialize
  class name as protobuf string

akka-actor/src/main/scala/akka/actor/Props.scala

@@ -127,7 +127,7 @@ case class Props(
    * Java API.
    */
   def this(actorClass: Class[_ <: Actor]) = this(
-    creator = () ⇒ actorClass.newInstance,
+    creator = FromClassCreator(actorClass),
     dispatcher = Dispatchers.DefaultDispatcherId,
     routerConfig = Props.defaultRoutedProps)
 
@@ -150,7 +150,7 @@ case class Props(
    *
    * Java API.
    */
-  def withCreator(c: Class[_ <: Actor]): Props = copy(creator = () ⇒ c.newInstance)
+  def withCreator(c: Class[_ <: Actor]): Props = copy(creator = FromClassCreator(c))
 
   /**
    * Returns a new Props with the specified dispatcher set.
@@ -166,4 +166,13 @@ case class Props(
    * Returns a new Props with the specified deployment configuration.
    */
   def withDeploy(d: Deploy): Props = copy(deploy = d)
+
+}
+
+/**
+ * Used when creating an Actor from a class. Special Function0 to be
+ * able to optimize serialization.
+ */
+private[akka] case class FromClassCreator(clazz: Class[_ <: Actor]) extends Function0[Actor] {
+  def apply(): Actor = clazz.newInstance
 }

akka-remote/src/main/java/akka/remote/RemoteProtocol.java

@@ -5035,20 +5035,24 @@ public final class RemoteProtocol {
   public interface PropsProtocolOrBuilder
       extends com.google.protobuf.MessageOrBuilder {
     
-    // required bytes creator = 1;
+    // required string dispatcher = 1;
-    boolean hasCreator();
-    com.google.protobuf.ByteString getCreator();
-    
-    // required string dispatcher = 2;
     boolean hasDispatcher();
     String getDispatcher();
     
-    // required .DeployProtocol deploy = 3;
+    // required .DeployProtocol deploy = 2;
     boolean hasDeploy();
     akka.remote.RemoteProtocol.DeployProtocol getDeploy();
     akka.remote.RemoteProtocol.DeployProtocolOrBuilder getDeployOrBuilder();
     
-    // optional bytes routerConfig = 4;
+    // optional string fromClassCreator = 3;
+    boolean hasFromClassCreator();
+    String getFromClassCreator();
+    
+    // optional bytes creator = 4;
+    boolean hasCreator();
+    com.google.protobuf.ByteString getCreator();
+    
+    // optional bytes routerConfig = 5;
     boolean hasRouterConfig();
     com.google.protobuf.ByteString getRouterConfig();
   }
@@ -5081,21 +5085,11 @@ public final class RemoteProtocol {
     }
     
     private int bitField0_;
-    // required bytes creator = 1;
+    // required string dispatcher = 1;
-    public static final int CREATOR_FIELD_NUMBER = 1;
+    public static final int DISPATCHER_FIELD_NUMBER = 1;
-    private com.google.protobuf.ByteString creator_;
-    public boolean hasCreator() {
-      return ((bitField0_ & 0x00000001) == 0x00000001);
-    }
-    public com.google.protobuf.ByteString getCreator() {
-      return creator_;
-    }
-    
-    // required string dispatcher = 2;
-    public static final int DISPATCHER_FIELD_NUMBER = 2;
     private java.lang.Object dispatcher_;
     public boolean hasDispatcher() {
-      return ((bitField0_ & 0x00000002) == 0x00000002);
+      return ((bitField0_ & 0x00000001) == 0x00000001);
     }
     public String getDispatcher() {
       java.lang.Object ref = dispatcher_;
@@ -5123,11 +5117,11 @@ public final class RemoteProtocol {
       }
     }
     
-    // required .DeployProtocol deploy = 3;
+    // required .DeployProtocol deploy = 2;
-    public static final int DEPLOY_FIELD_NUMBER = 3;
+    public static final int DEPLOY_FIELD_NUMBER = 2;
     private akka.remote.RemoteProtocol.DeployProtocol deploy_;
     public boolean hasDeploy() {
-      return ((bitField0_ & 0x00000004) == 0x00000004);
+      return ((bitField0_ & 0x00000002) == 0x00000002);
     }
     public akka.remote.RemoteProtocol.DeployProtocol getDeploy() {
       return deploy_;
@@ -5136,20 +5130,63 @@ public final class RemoteProtocol {
       return deploy_;
     }
     
-    // optional bytes routerConfig = 4;
+    // optional string fromClassCreator = 3;
-    public static final int ROUTERCONFIG_FIELD_NUMBER = 4;
+    public static final int FROMCLASSCREATOR_FIELD_NUMBER = 3;
+    private java.lang.Object fromClassCreator_;
+    public boolean hasFromClassCreator() {
+      return ((bitField0_ & 0x00000004) == 0x00000004);
+    }
+    public String getFromClassCreator() {
+      java.lang.Object ref = fromClassCreator_;
+      if (ref instanceof String) {
+        return (String) ref;
+      } else {
+        com.google.protobuf.ByteString bs = 
+            (com.google.protobuf.ByteString) ref;
+        String s = bs.toStringUtf8();
+        if (com.google.protobuf.Internal.isValidUtf8(bs)) {
+          fromClassCreator_ = s;
+        }
+        return s;
+      }
+    }
+    private com.google.protobuf.ByteString getFromClassCreatorBytes() {
+      java.lang.Object ref = fromClassCreator_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b = 
+            com.google.protobuf.ByteString.copyFromUtf8((String) ref);
+        fromClassCreator_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    
+    // optional bytes creator = 4;
+    public static final int CREATOR_FIELD_NUMBER = 4;
+    private com.google.protobuf.ByteString creator_;
+    public boolean hasCreator() {
+      return ((bitField0_ & 0x00000008) == 0x00000008);
+    }
+    public com.google.protobuf.ByteString getCreator() {
+      return creator_;
+    }
+    
+    // optional bytes routerConfig = 5;
+    public static final int ROUTERCONFIG_FIELD_NUMBER = 5;
     private com.google.protobuf.ByteString routerConfig_;
     public boolean hasRouterConfig() {
-      return ((bitField0_ & 0x00000008) == 0x00000008);
+      return ((bitField0_ & 0x00000010) == 0x00000010);
     }
     public com.google.protobuf.ByteString getRouterConfig() {
       return routerConfig_;
     }
     
     private void initFields() {
-      creator_ = com.google.protobuf.ByteString.EMPTY;
       dispatcher_ = "";
       deploy_ = akka.remote.RemoteProtocol.DeployProtocol.getDefaultInstance();
+      fromClassCreator_ = "";
+      creator_ = com.google.protobuf.ByteString.EMPTY;
       routerConfig_ = com.google.protobuf.ByteString.EMPTY;
     }
     private byte memoizedIsInitialized = -1;
@@ -5157,10 +5194,6 @@ public final class RemoteProtocol {
       byte isInitialized = memoizedIsInitialized;
       if (isInitialized != -1) return isInitialized == 1;
       
-      if (!hasCreator()) {
-        memoizedIsInitialized = 0;
-        return false;
-      }
       if (!hasDispatcher()) {
         memoizedIsInitialized = 0;
         return false;
@@ -5181,16 +5214,19 @@ public final class RemoteProtocol {
                         throws java.io.IOException {
       getSerializedSize();
       if (((bitField0_ & 0x00000001) == 0x00000001)) {
-        output.writeBytes(1, creator_);
+        output.writeBytes(1, getDispatcherBytes());
       }
       if (((bitField0_ & 0x00000002) == 0x00000002)) {
-        output.writeBytes(2, getDispatcherBytes());
+        output.writeMessage(2, deploy_);
       }
       if (((bitField0_ & 0x00000004) == 0x00000004)) {
-        output.writeMessage(3, deploy_);
+        output.writeBytes(3, getFromClassCreatorBytes());
       }
       if (((bitField0_ & 0x00000008) == 0x00000008)) {
-        output.writeBytes(4, routerConfig_);
+        output.writeBytes(4, creator_);
+      }
+      if (((bitField0_ & 0x00000010) == 0x00000010)) {
+        output.writeBytes(5, routerConfig_);
       }
       getUnknownFields().writeTo(output);
     }
@@ -5203,19 +5239,23 @@ public final class RemoteProtocol {
       size = 0;
       if (((bitField0_ & 0x00000001) == 0x00000001)) {
         size += com.google.protobuf.CodedOutputStream
-          .computeBytesSize(1, creator_);
+          .computeBytesSize(1, getDispatcherBytes());
       }
       if (((bitField0_ & 0x00000002) == 0x00000002)) {
         size += com.google.protobuf.CodedOutputStream
-          .computeBytesSize(2, getDispatcherBytes());
+          .computeMessageSize(2, deploy_);
       }
       if (((bitField0_ & 0x00000004) == 0x00000004)) {
         size += com.google.protobuf.CodedOutputStream
-          .computeMessageSize(3, deploy_);
+          .computeBytesSize(3, getFromClassCreatorBytes());
       }
       if (((bitField0_ & 0x00000008) == 0x00000008)) {
         size += com.google.protobuf.CodedOutputStream
-          .computeBytesSize(4, routerConfig_);
+          .computeBytesSize(4, creator_);
+      }
+      if (((bitField0_ & 0x00000010) == 0x00000010)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeBytesSize(5, routerConfig_);
       }
       size += getUnknownFields().getSerializedSize();
       memoizedSerializedSize = size;
@@ -5342,18 +5382,20 @@ public final class RemoteProtocol {
       
       public Builder clear() {
         super.clear();
-        creator_ = com.google.protobuf.ByteString.EMPTY;
-        bitField0_ = (bitField0_ & ~0x00000001);
         dispatcher_ = "";
-        bitField0_ = (bitField0_ & ~0x00000002);
+        bitField0_ = (bitField0_ & ~0x00000001);
         if (deployBuilder_ == null) {
           deploy_ = akka.remote.RemoteProtocol.DeployProtocol.getDefaultInstance();
         } else {
           deployBuilder_.clear();
         }
+        bitField0_ = (bitField0_ & ~0x00000002);
+        fromClassCreator_ = "";
         bitField0_ = (bitField0_ & ~0x00000004);
-        routerConfig_ = com.google.protobuf.ByteString.EMPTY;
+        creator_ = com.google.protobuf.ByteString.EMPTY;
         bitField0_ = (bitField0_ & ~0x00000008);
+        routerConfig_ = com.google.protobuf.ByteString.EMPTY;
+        bitField0_ = (bitField0_ & ~0x00000010);
         return this;
       }
       
@@ -5395,22 +5437,26 @@ public final class RemoteProtocol {
         if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
           to_bitField0_ |= 0x00000001;
         }
-        result.creator_ = creator_;
+        result.dispatcher_ = dispatcher_;
         if (((from_bitField0_ & 0x00000002) == 0x00000002)) {
           to_bitField0_ |= 0x00000002;
         }
-        result.dispatcher_ = dispatcher_;
-        if (((from_bitField0_ & 0x00000004) == 0x00000004)) {
-          to_bitField0_ |= 0x00000004;
-        }
         if (deployBuilder_ == null) {
           result.deploy_ = deploy_;
         } else {
           result.deploy_ = deployBuilder_.build();
         }
+        if (((from_bitField0_ & 0x00000004) == 0x00000004)) {
+          to_bitField0_ |= 0x00000004;
+        }
+        result.fromClassCreator_ = fromClassCreator_;
         if (((from_bitField0_ & 0x00000008) == 0x00000008)) {
           to_bitField0_ |= 0x00000008;
         }
+        result.creator_ = creator_;
+        if (((from_bitField0_ & 0x00000010) == 0x00000010)) {
+          to_bitField0_ |= 0x00000010;
+        }
         result.routerConfig_ = routerConfig_;
         result.bitField0_ = to_bitField0_;
         onBuilt();
@@ -5428,15 +5474,18 @@ public final class RemoteProtocol {
       
       public Builder mergeFrom(akka.remote.RemoteProtocol.PropsProtocol other) {
         if (other == akka.remote.RemoteProtocol.PropsProtocol.getDefaultInstance()) return this;
-        if (other.hasCreator()) {
-          setCreator(other.getCreator());
-        }
         if (other.hasDispatcher()) {
           setDispatcher(other.getDispatcher());
         }
         if (other.hasDeploy()) {
           mergeDeploy(other.getDeploy());
         }
+        if (other.hasFromClassCreator()) {
+          setFromClassCreator(other.getFromClassCreator());
+        }
+        if (other.hasCreator()) {
+          setCreator(other.getCreator());
+        }
         if (other.hasRouterConfig()) {
           setRouterConfig(other.getRouterConfig());
         }
@@ -5445,10 +5494,6 @@ public final class RemoteProtocol {
       }
       
       public final boolean isInitialized() {
-        if (!hasCreator()) {
-          
-          return false;
-        }
         if (!hasDispatcher()) {
           
           return false;
@@ -5489,15 +5534,10 @@ public final class RemoteProtocol {
             }
             case 10: {
               bitField0_ |= 0x00000001;
-              creator_ = input.readBytes();
-              break;
-            }
-            case 18: {
-              bitField0_ |= 0x00000002;
               dispatcher_ = input.readBytes();
               break;
             }
-            case 26: {
+            case 18: {
               akka.remote.RemoteProtocol.DeployProtocol.Builder subBuilder = akka.remote.RemoteProtocol.DeployProtocol.newBuilder();
               if (hasDeploy()) {
                 subBuilder.mergeFrom(getDeploy());
@@ -5506,8 +5546,18 @@ public final class RemoteProtocol {
               setDeploy(subBuilder.buildPartial());
               break;
             }
+            case 26: {
+              bitField0_ |= 0x00000004;
+              fromClassCreator_ = input.readBytes();
+              break;
+            }
             case 34: {
               bitField0_ |= 0x00000008;
+              creator_ = input.readBytes();
+              break;
+            }
+            case 42: {
+              bitField0_ |= 0x00000010;
               routerConfig_ = input.readBytes();
               break;
             }
@@ -5517,34 +5567,10 @@ public final class RemoteProtocol {
       
       private int bitField0_;
       
-      // required bytes creator = 1;
+      // required string dispatcher = 1;
-      private com.google.protobuf.ByteString creator_ = com.google.protobuf.ByteString.EMPTY;
-      public boolean hasCreator() {
-        return ((bitField0_ & 0x00000001) == 0x00000001);
-      }
-      public com.google.protobuf.ByteString getCreator() {
-        return creator_;
-      }
-      public Builder setCreator(com.google.protobuf.ByteString value) {
-        if (value == null) {
-    throw new NullPointerException();
-  }
-  bitField0_ |= 0x00000001;
-        creator_ = value;
-        onChanged();
-        return this;
-      }
-      public Builder clearCreator() {
-        bitField0_ = (bitField0_ & ~0x00000001);
-        creator_ = getDefaultInstance().getCreator();
-        onChanged();
-        return this;
-      }
-      
-      // required string dispatcher = 2;
       private java.lang.Object dispatcher_ = "";
       public boolean hasDispatcher() {
-        return ((bitField0_ & 0x00000002) == 0x00000002);
+        return ((bitField0_ & 0x00000001) == 0x00000001);
       }
       public String getDispatcher() {
         java.lang.Object ref = dispatcher_;
@@ -5560,29 +5586,29 @@ public final class RemoteProtocol {
         if (value == null) {
     throw new NullPointerException();
   }
-  bitField0_ |= 0x00000002;
+  bitField0_ |= 0x00000001;
         dispatcher_ = value;
         onChanged();
         return this;
       }
       public Builder clearDispatcher() {
-        bitField0_ = (bitField0_ & ~0x00000002);
+        bitField0_ = (bitField0_ & ~0x00000001);
         dispatcher_ = getDefaultInstance().getDispatcher();
         onChanged();
         return this;
       }
       void setDispatcher(com.google.protobuf.ByteString value) {
-        bitField0_ |= 0x00000002;
+        bitField0_ |= 0x00000001;
         dispatcher_ = value;
         onChanged();
       }
       
-      // required .DeployProtocol deploy = 3;
+      // required .DeployProtocol deploy = 2;
       private akka.remote.RemoteProtocol.DeployProtocol deploy_ = akka.remote.RemoteProtocol.DeployProtocol.getDefaultInstance();
       private com.google.protobuf.SingleFieldBuilder<
           akka.remote.RemoteProtocol.DeployProtocol, akka.remote.RemoteProtocol.DeployProtocol.Builder, akka.remote.RemoteProtocol.DeployProtocolOrBuilder> deployBuilder_;
       public boolean hasDeploy() {
-        return ((bitField0_ & 0x00000004) == 0x00000004);
+        return ((bitField0_ & 0x00000002) == 0x00000002);
       }
       public akka.remote.RemoteProtocol.DeployProtocol getDeploy() {
         if (deployBuilder_ == null) {
@@ -5601,7 +5627,7 @@ public final class RemoteProtocol {
         } else {
           deployBuilder_.setMessage(value);
         }
-        bitField0_ |= 0x00000004;
+        bitField0_ |= 0x00000002;
         return this;
       }
       public Builder setDeploy(
@@ -5612,12 +5638,12 @@ public final class RemoteProtocol {
         } else {
           deployBuilder_.setMessage(builderForValue.build());
         }
-        bitField0_ |= 0x00000004;
+        bitField0_ |= 0x00000002;
         return this;
       }
       public Builder mergeDeploy(akka.remote.RemoteProtocol.DeployProtocol value) {
         if (deployBuilder_ == null) {
-          if (((bitField0_ & 0x00000004) == 0x00000004) &&
+          if (((bitField0_ & 0x00000002) == 0x00000002) &&
               deploy_ != akka.remote.RemoteProtocol.DeployProtocol.getDefaultInstance()) {
             deploy_ =
               akka.remote.RemoteProtocol.DeployProtocol.newBuilder(deploy_).mergeFrom(value).buildPartial();
@@ -5628,7 +5654,7 @@ public final class RemoteProtocol {
         } else {
           deployBuilder_.mergeFrom(value);
         }
-        bitField0_ |= 0x00000004;
+        bitField0_ |= 0x00000002;
         return this;
       }
       public Builder clearDeploy() {
@@ -5638,11 +5664,11 @@ public final class RemoteProtocol {
         } else {
           deployBuilder_.clear();
         }
-        bitField0_ = (bitField0_ & ~0x00000004);
+        bitField0_ = (bitField0_ & ~0x00000002);
         return this;
       }
       public akka.remote.RemoteProtocol.DeployProtocol.Builder getDeployBuilder() {
-        bitField0_ |= 0x00000004;
+        bitField0_ |= 0x00000002;
         onChanged();
         return getDeployFieldBuilder().getBuilder();
       }
@@ -5667,10 +5693,70 @@ public final class RemoteProtocol {
         return deployBuilder_;
       }
       
-      // optional bytes routerConfig = 4;
+      // optional string fromClassCreator = 3;
+      private java.lang.Object fromClassCreator_ = "";
+      public boolean hasFromClassCreator() {
+        return ((bitField0_ & 0x00000004) == 0x00000004);
+      }
+      public String getFromClassCreator() {
+        java.lang.Object ref = fromClassCreator_;
+        if (!(ref instanceof String)) {
+          String s = ((com.google.protobuf.ByteString) ref).toStringUtf8();
+          fromClassCreator_ = s;
+          return s;
+        } else {
+          return (String) ref;
+        }
+      }
+      public Builder setFromClassCreator(String value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000004;
+        fromClassCreator_ = value;
+        onChanged();
+        return this;
+      }
+      public Builder clearFromClassCreator() {
+        bitField0_ = (bitField0_ & ~0x00000004);
+        fromClassCreator_ = getDefaultInstance().getFromClassCreator();
+        onChanged();
+        return this;
+      }
+      void setFromClassCreator(com.google.protobuf.ByteString value) {
+        bitField0_ |= 0x00000004;
+        fromClassCreator_ = value;
+        onChanged();
+      }
+      
+      // optional bytes creator = 4;
+      private com.google.protobuf.ByteString creator_ = com.google.protobuf.ByteString.EMPTY;
+      public boolean hasCreator() {
+        return ((bitField0_ & 0x00000008) == 0x00000008);
+      }
+      public com.google.protobuf.ByteString getCreator() {
+        return creator_;
+      }
+      public Builder setCreator(com.google.protobuf.ByteString value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000008;
+        creator_ = value;
+        onChanged();
+        return this;
+      }
+      public Builder clearCreator() {
+        bitField0_ = (bitField0_ & ~0x00000008);
+        creator_ = getDefaultInstance().getCreator();
+        onChanged();
+        return this;
+      }
+      
+      // optional bytes routerConfig = 5;
       private com.google.protobuf.ByteString routerConfig_ = com.google.protobuf.ByteString.EMPTY;
       public boolean hasRouterConfig() {
-        return ((bitField0_ & 0x00000008) == 0x00000008);
+        return ((bitField0_ & 0x00000010) == 0x00000010);
       }
       public com.google.protobuf.ByteString getRouterConfig() {
         return routerConfig_;
@@ -5679,13 +5765,13 @@ public final class RemoteProtocol {
         if (value == null) {
     throw new NullPointerException();
   }
-  bitField0_ |= 0x00000008;
+  bitField0_ |= 0x00000010;
         routerConfig_ = value;
         onChanged();
         return this;
       }
       public Builder clearRouterConfig() {
-        bitField0_ = (bitField0_ & ~0x00000008);
+        bitField0_ = (bitField0_ & ~0x00000010);
         routerConfig_ = getDefaultInstance().getRouterConfig();
         onChanged();
         return this;
@@ -6947,17 +7033,17 @@ public final class RemoteProtocol {
       "\014\n\004port\030\003 \002(\r\"\216\001\n\027DaemonMsgCreateProtoco" +
       "l\022\035\n\005props\030\001 \002(\0132\016.PropsProtocol\022\037\n\006depl" +
       "oy\030\002 \002(\0132\017.DeployProtocol\022\014\n\004path\030\003 \002(\t\022" +
-      "%\n\nsupervisor\030\004 \002(\0132\021.ActorRefProtocol\"k",
+      "%\n\nsupervisor\030\004 \002(\0132\021.ActorRefProtocol\"\205",
-      "\n\rPropsProtocol\022\017\n\007creator\030\001 \002(\014\022\022\n\ndisp" +
+      "\001\n\rPropsProtocol\022\022\n\ndispatcher\030\001 \002(\t\022\037\n\006" +
-      "atcher\030\002 \002(\t\022\037\n\006deploy\030\003 \002(\0132\017.DeployPro" +
+      "deploy\030\002 \002(\0132\017.DeployProtocol\022\030\n\020fromCla" +
-      "tocol\022\024\n\014routerConfig\030\004 \001(\014\"S\n\016DeployPro" +
+      "ssCreator\030\003 \001(\t\022\017\n\007creator\030\004 \001(\014\022\024\n\014rout" +
-      "tocol\022\014\n\004path\030\001 \002(\t\022\016\n\006config\030\002 \001(\014\022\024\n\014r" +
+      "erConfig\030\005 \001(\014\"S\n\016DeployProtocol\022\014\n\004path" +
-      "outerConfig\030\003 \001(\014\022\r\n\005scope\030\004 \001(\014\"`\n\026Daem" +
+      "\030\001 \002(\t\022\016\n\006config\030\002 \001(\014\022\024\n\014routerConfig\030\003" +
-      "onMsgWatchProtocol\022\"\n\007watcher\030\001 \002(\0132\021.Ac" +
+      " \001(\014\022\r\n\005scope\030\004 \001(\014\"`\n\026DaemonMsgWatchPro" +
-      "torRefProtocol\022\"\n\007watched\030\002 \002(\0132\021.ActorR" +
+      "tocol\022\"\n\007watcher\030\001 \002(\0132\021.ActorRefProtoco" +
-      "efProtocol*7\n\013CommandType\022\013\n\007CONNECT\020\001\022\014" +
+      "l\022\"\n\007watched\030\002 \002(\0132\021.ActorRefProtocol*7\n" +
-      "\n\010SHUTDOWN\020\002\022\r\n\tHEARTBEAT\020\003B\017\n\013akka.remo" +
+      "\013CommandType\022\013\n\007CONNECT\020\001\022\014\n\010SHUTDOWN\020\002\022" +
-      "teH\001"
+      "\r\n\tHEARTBEAT\020\003B\017\n\013akka.remoteH\001"
     };
     com.google.protobuf.Descriptors.FileDescriptor.InternalDescriptorAssigner assigner =
       new com.google.protobuf.Descriptors.FileDescriptor.InternalDescriptorAssigner() {
@@ -7033,7 +7119,7 @@ public final class RemoteProtocol {
           internal_static_PropsProtocol_fieldAccessorTable = new
             com.google.protobuf.GeneratedMessage.FieldAccessorTable(
               internal_static_PropsProtocol_descriptor,
-              new java.lang.String[] { "Creator", "Dispatcher", "Deploy", "RouterConfig", },
+              new java.lang.String[] { "Dispatcher", "Deploy", "FromClassCreator", "Creator", "RouterConfig", },
               akka.remote.RemoteProtocol.PropsProtocol.class,
               akka.remote.RemoteProtocol.PropsProtocol.Builder.class);
           internal_static_DeployProtocol_descriptor =

akka-remote/src/main/protocol/RemoteProtocol.proto

@@ -92,10 +92,11 @@ message DaemonMsgCreateProtocol {
  * Serialization of akka.actor.Props
  */
 message PropsProtocol {
-  required bytes creator = 1;
+  required string dispatcher = 1;
-  required string dispatcher = 2;
+  required DeployProtocol deploy = 2;
-  required DeployProtocol deploy = 3;
+  optional string fromClassCreator = 3;
-  optional bytes routerConfig = 4;
+  optional bytes creator = 4;
+  optional bytes routerConfig = 5;
 }
 
 /**

akka-remote/src/main/scala/akka/serialization/DaemonMsgCreateSerializer.scala

@@ -5,11 +5,9 @@
 package akka.serialization
 
 import java.io.Serializable
-
 import com.google.protobuf.ByteString
 import com.typesafe.config.Config
 import com.typesafe.config.ConfigFactory
-
 import akka.actor.Actor
 import akka.actor.ActorRef
 import akka.actor.Deploy
@@ -24,12 +22,14 @@ import akka.remote.RemoteProtocol.DeployProtocol
 import akka.remote.RemoteProtocol.PropsProtocol
 import akka.routing.NoRouter
 import akka.routing.RouterConfig
+import akka.actor.FromClassCreator
 
 /**
  * Serializes akka's internal DaemonMsgCreate using protobuf
  * for the core structure of DaemonMsgCreate, Props and Deploy.
- * Serialization of contained RouterConfig, Config, Scope, and creator (scala.Function0)
+ * Serialization of contained RouterConfig, Config, and Scope
- * is done with configured serializer for those classes, by default java.io.Serializable.
+ * is done with configured serializer for those classes, by
+ * default java.io.Serializable.
  */
 class DaemonMsgCreateSerializer(val system: ExtendedActorSystem) extends Serializer {
   import ProtobufSerializer.serializeActorRef
@@ -55,9 +55,12 @@ class DaemonMsgCreateSerializer(val system: ExtendedActorSystem) extends Seriali
 
       def propsProto = {
         val builder = PropsProtocol.newBuilder.
-          setCreator(serialize(props.creator)).
           setDispatcher(props.dispatcher).
           setDeploy(deployProto(props.deploy))
+        props.creator match {
+          case FromClassCreator(clazz) ⇒ builder.setFromClassCreator(clazz.getName)
+          case creator                 ⇒ builder.setCreator(serialize(creator))
+        }
         if (props.routerConfig != NoRouter)
           builder.setRouterConfig(serialize(props.routerConfig))
         builder.build
@@ -92,11 +95,22 @@ class DaemonMsgCreateSerializer(val system: ExtendedActorSystem) extends Seriali
     }
 
     def props = {
+      val creator =
+        if (proto.getProps.hasFromClassCreator) {
+          system.dynamicAccess.getClassFor(proto.getProps.getFromClassCreator) match {
+            case Right(clazz) ⇒ FromClassCreator(clazz)
+            case Left(e)      ⇒ throw e
+          }
+        } else {
+          deserialize(proto.getProps.getCreator, classOf[() ⇒ Actor])
+        }
+
       val routerConfig =
         if (proto.getProps.hasRouterConfig) deserialize(proto.getProps.getRouterConfig, classOf[RouterConfig])
         else NoRouter
+
       Props(
-        creator = deserialize(proto.getProps.getCreator, classOf[() ⇒ Actor]),
+        creator = creator,
         dispatcher = proto.getProps.getDispatcher,
         routerConfig = routerConfig,
         deploy = deploy(proto.getProps.getDeploy))
@@ -124,7 +138,6 @@ class DaemonMsgCreateSerializer(val system: ExtendedActorSystem) extends Seriali
       case Left(e) ⇒
         // Fallback to the java serializer, because some interfaces don't implement java.io.Serializable,
         // but the impl instance does. This could be optimized by adding java serializers in reference.conf:
-        // scala.Function0 (the creator)
         // com.typesafe.config.Config
         // akka.routing.RouterConfig
         // akka.actor.Scope

akka-remote/src/test/scala/akka/serialization/DaemonMsgCreateSerializerSpec.scala

@@ -17,6 +17,7 @@ import akka.remote.RemoteScope
 import akka.routing.RoundRobinRouter
 import akka.routing.FromConfig
 import akka.util.duration._
+import akka.actor.FromClassCreator
 
 object DaemonMsgCreateSerializerSpec {
   class MyActor extends Actor {
@@ -39,25 +40,28 @@ class DaemonMsgCreateSerializerSpec extends AkkaSpec {
       ser.serializerFor(classOf[DaemonMsgCreate]).getClass must be(classOf[DaemonMsgCreateSerializer])
     }
 
-    "serialize and de-serialize simple DaemonMsgCreate" in {
+    "serialize and de-serialize DaemonMsgCreate with FromClassCreator" in {
-
+      verifySerialization {
-      val msg = DaemonMsgCreate(
+        DaemonMsgCreate(
           props = Props[MyActor],
           deploy = Deploy(),
           path = "foo",
           supervisor = supervisor)
-
-      val bytes = ser.serialize(msg) match {
-        case Left(exception) ⇒ fail(exception)
-        case Right(bytes)    ⇒ bytes
       }
-      ser.deserialize(bytes.asInstanceOf[Array[Byte]], classOf[DaemonMsgCreate]) match {
+    }
-        case Left(exception)           ⇒ fail(exception)
+
-        case Right(m: DaemonMsgCreate) ⇒ assertDaemonMsgCreate(msg, m)
+    "serialize and de-serialize DaemonMsgCreate with function creator" in {
+      verifySerialization {
+        DaemonMsgCreate(
+          props = Props().withCreator(new MyActor),
+          deploy = Deploy(),
+          path = "foo",
+          supervisor = supervisor)
       }
     }
 
     "serialize and de-serialize DaemonMsgCreate with Deploy and RouterConfig" in {
+      verifySerialization {
         // Duration.Inf doesn't equal Duration.Inf, so we use another for test
         val supervisorStrategy = OneForOneStrategy(3, 10 seconds) {
           case _ ⇒ SupervisorStrategy.Escalate
@@ -72,12 +76,15 @@ class DaemonMsgCreateSerializerSpec extends AkkaSpec {
           config = ConfigFactory.parseString("a=2"),
           routerConfig = FromConfig,
           scope = RemoteScope(Address("akka", "Test", "host2", 1922)))
-      val msg = DaemonMsgCreate(
+        DaemonMsgCreate(
           props = Props[MyActor].withDispatcher("my-disp").withDeploy(deploy1),
           deploy = deploy2,
           path = "foo",
           supervisor = supervisor)
+      }
+    }
 
+    def verifySerialization(msg: DaemonMsgCreate): Unit = {
       val bytes = ser.serialize(msg) match {
         case Left(exception) ⇒ fail(exception)
         case Right(bytes)    ⇒ bytes
@@ -89,7 +96,9 @@ class DaemonMsgCreateSerializerSpec extends AkkaSpec {
     }
 
     def assertDaemonMsgCreate(expected: DaemonMsgCreate, got: DaemonMsgCreate): Unit = {
-      // can't compare props.creator
+      // can't compare props.creator when function
+      if (expected.props.creator.isInstanceOf[FromClassCreator])
+        assert(got.props.creator === expected.props.creator)
       assert(got.props.dispatcher === expected.props.dispatcher)
       assert(got.props.dispatcher === expected.props.dispatcher)
       assert(got.props.routerConfig === expected.props.routerConfig)