Add protobuf based Client service.protobuf-benchmark

Use the new service internally in Client.

5 files changed, 2086 insertions, 120 deletions

diff --git a/same/src/main/java/com/orbekk/same/Client.java b/same/src/main/java/com/orbekk/same/Client.java
index 53d0ac8..704dc8e 100644
--- a/same/src/main/java/com/orbekk/same/Client.java
+++ b/same/src/main/java/com/orbekk/same/Client.java
@@ -11,7 +11,11 @@ import java.util.concurrent.Future;
 import org.slf4j.Logger;
 import org.slf4j.LoggerFactory;
 
+import com.google.protobuf.RpcCallback;
+import com.google.protobuf.RpcController;
 import com.orbekk.paxos.MasterProposer;
+import com.orbekk.same.Services.Empty;
+import com.orbekk.same.Services.MasterState;
 import com.orbekk.same.State.Component;
 import com.orbekk.util.DelayedOperation;
 import com.orbekk.util.WorkQueue;
@@ -94,58 +98,87 @@ public class Client {
 
     private ClientInterface clientInterface = new ClientInterfaceImpl();
 
-    private ClientService serviceImpl = new ClientService() {
-        @Override
-        public void setState(String component, String data, long revision) throws Exception {
-            boolean status = state.update(component, data, revision);
+    private Services.Client newServiceImpl = new Services.Client() {
+        @Override public void setState(RpcController controller,
+                Services.Component request, RpcCallback<Empty> done) {
+            boolean status = state.update(request.getId(), request.getData(),
+                    request.getRevision());
             if (status) {
                 for (StateChangedListener listener : stateListeners) {
-                    listener.stateChanged(state.getComponent(component));
+                    listener.stateChanged(state.getComponent(request.getId()));
                 }
             } else {
                 logger.warn("Ignoring update: {) => {}",
-                        state.getComponent(component),
-                        new State.Component(component, revision, data));
-            }            
-        }
-
-        @Override
-        public void notifyNetwork(String networkName, String masterUrl) throws Exception {
-            logger.info("NotifyNetwork(networkName={}, masterUrl={})", 
-                    networkName, masterUrl);
-            if (networkListener != null) {
-                networkListener.notifyNetwork(networkName, masterUrl);
-            }            
+                        state.getComponent(request.getId()),
+                        new State.Component(request.getId(), request.getRevision(),
+                                request.getData()));
+            }
         }
 
-        @Override
-        public synchronized void masterTakeover(String masterUrl, String networkName, 
-                int masterId) throws Exception {
-            logger.info("MasterTakeover({}, {}, {})",
-                    new Object[]{masterUrl, networkName, masterId});
-            if (masterId <= Client.this.masterId) {
-                logger.warn("{}:{} tried to take over, but current master is " +
-                		"{}:{}. Ignoring", new Object[]{masterUrl, masterId,
-                                state.getDataOf(".masterUrl"),
-                                Client.this.masterId}); 
+        @Override public void masterTakeover(RpcController controller,
+                MasterState request, RpcCallback<Empty> done) {
+            logger.info("MasterTakeover({})", request);
+            if (request.getMasterId() <= Client.this.masterId) {
+                logger.warn("{} tried to take over, but current master is " +
+                        "{}:{}. Ignoring", new Object[]{request,
+                        state.getDataOf(".masterUrl"),
+                        Client.this.masterId}); 
                 return;
             }
             abortMasterElection();
-            Client.this.masterUrl = masterUrl;
-            Client.this.masterId = masterId;
+            Client.this.masterUrl = request.getMasterUrl();
+            Client.this.masterId = request.getMasterId();
             connectionState = ConnectionState.STABLE;
         }
 
-        @Override
-        public void masterDown(int masterId) throws Exception {
-            if (masterId < Client.this.masterId) {
+        @Override public void masterDown(RpcController controller, MasterState request,
+                RpcCallback<Empty> done) {
+            if (request.getMasterId() < Client.this.masterId) {
                 logger.info("Master {} is down, but current master is {}. Ignoring.",
-                        masterId, Client.this.masterId);
+                        request.getMasterId(), Client.this.masterId);
                 return;
             }
             logger.warn("Master down.");
             connectionState = ConnectionState.UNSTABLE;
-            tryBecomeMaster(masterId);
+            tryBecomeMaster(request.getMasterId());
+        }
+    };
+    
+    private ClientService serviceImpl = new ClientService() {
+        RpcCallback<Empty> noOp = new RpcCallback<Empty>() {
+            @Override public void run(Empty unused) {
+            }
+        };
+        
+        @Override
+        public void setState(String component, String data, long revision) throws Exception {
+            Services.Component request = Services.Component.newBuilder()
+                    .setId(component)
+                    .setData(data)
+                    .setRevision(revision)
+                    .build();
+            newServiceImpl.setState(null, request, noOp);
+        }
+
+        @Override
+        public synchronized void masterTakeover(String masterUrl, String networkName, 
+                int masterId) throws Exception {
+            Services.MasterState request = Services.MasterState.newBuilder()
+                    .setMasterUrl(masterUrl)
+                    .setNetworkName(networkName)
+                    .setMasterId(masterId)
+                    .build();
+            newServiceImpl.masterTakeover(null, request, noOp);
+        }
+
+        @Override
+        public void masterDown(int masterId) throws Exception {
+            Services.MasterState request = Services.MasterState.newBuilder()
+                    .setMasterUrl(masterUrl)
+                    .setNetworkName(state.getDataOf(".networkName"))
+                    .setMasterId(masterId)
+                    .build();
+            newServiceImpl.masterDown(null, request, noOp);
         }
     };
 
diff --git a/same/src/main/java/com/orbekk/same/ClientService.java b/same/src/main/java/com/orbekk/same/ClientService.java
index 8d460db..97215e0 100644
--- a/same/src/main/java/com/orbekk/same/ClientService.java
+++ b/same/src/main/java/com/orbekk/same/ClientService.java
@@ -1,8 +1,6 @@
 package com.orbekk.same;
 
 public interface ClientService {
-    void notifyNetwork(String networkName, String masterUrl) throws Exception;
-
     void setState(String component, String data, long revision) throws Exception;
 
     /** A new master takes over.
diff --git a/same/src/main/java/com/orbekk/same/Services.java b/same/src/main/java/com/orbekk/same/Services.java
new file mode 100644
index 0000000..90017a6
--- /dev/null
+++ b/same/src/main/java/com/orbekk/same/Services.java
@@ -0,0 +1,1789 @@
+// Generated by the protocol buffer compiler.  DO NOT EDIT!
+// source: src/main/java/com/orbekk/same/services.proto
+
+package com.orbekk.same;
+
+public final class Services {
+  private Services() {}
+  public static void registerAllExtensions(
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+  }
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+    
+    public static Builder newBuilder() { return Builder.create(); }
+    public Builder newBuilderForType() { return newBuilder(); }
+    public static Builder newBuilder(com.orbekk.same.Services.Component prototype) {
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+    public Builder toBuilder() { return newBuilder(this); }
+    
+    @java.lang.Override
+    protected Builder newBuilderForType(
+        com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+      Builder builder = new Builder(parent);
+      return builder;
+    }
+    public static final class Builder extends
+        com.google.protobuf.GeneratedMessage.Builder<Builder>
+       implements com.orbekk.same.Services.ComponentOrBuilder {
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
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+      }
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+      protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
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+      private Builder() {
+        maybeForceBuilderInitialization();
+      }
+      
+      private Builder(BuilderParent parent) {
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+        maybeForceBuilderInitialization();
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+      public Builder clone() {
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+      
+      public com.google.protobuf.Descriptors.Descriptor
+          getDescriptorForType() {
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+        com.orbekk.same.Services.Component result = buildPartial();
+        if (!result.isInitialized()) {
+          throw newUninitializedMessageException(result);
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+        return result;
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+      private com.orbekk.same.Services.Component buildParsed()
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        com.orbekk.same.Services.Component result = buildPartial();
+        if (!result.isInitialized()) {
+          throw newUninitializedMessageException(
+            result).asInvalidProtocolBufferException();
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+        return result;
+      }
+      
+      public com.orbekk.same.Services.Component buildPartial() {
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+        int from_bitField0_ = bitField0_;
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+        result.revision_ = revision_;
+        result.bitField0_ = to_bitField0_;
+        onBuilt();
+        return result;
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+      
+      public Builder mergeFrom(com.google.protobuf.Message other) {
+        if (other instanceof com.orbekk.same.Services.Component) {
+          return mergeFrom((com.orbekk.same.Services.Component)other);
+        } else {
+          super.mergeFrom(other);
+          return this;
+        }
+      }
+      
+      public Builder mergeFrom(com.orbekk.same.Services.Component other) {
+        if (other == com.orbekk.same.Services.Component.getDefaultInstance()) return this;
+        if (other.hasId()) {
+          setId(other.getId());
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+        if (other.hasData()) {
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+        if (other.hasRevision()) {
+          setRevision(other.getRevision());
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+        this.mergeUnknownFields(other.getUnknownFields());
+        return this;
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+      public final boolean isInitialized() {
+        if (!hasId()) {
+          
+          return false;
+        }
+        if (!hasData()) {
+          
+          return false;
+        }
+        if (!hasRevision()) {
+          
+          return false;
+        }
+        return true;
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+      
+      public Builder mergeFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+          com.google.protobuf.UnknownFieldSet.newBuilder(
+            this.getUnknownFields());
+        while (true) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              this.setUnknownFields(unknownFields.build());
+              onChanged();
+              return this;
+            default: {
+              if (!parseUnknownField(input, unknownFields,
+                                     extensionRegistry, tag)) {
+                this.setUnknownFields(unknownFields.build());
+                onChanged();
+                return this;
+              }
+              break;
+            }
+            case 10: {
+              bitField0_ |= 0x00000001;
+              id_ = input.readBytes();
+              break;
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+            case 18: {
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+              data_ = input.readBytes();
+              break;
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+            case 24: {
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+              revision_ = input.readInt64();
+              break;
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+        }
+      }
+      
+      private int bitField0_;
+      
+      // required string id = 1;
+      private java.lang.Object id_ = "";
+      public boolean hasId() {
+        return ((bitField0_ & 0x00000001) == 0x00000001);
+      }
+      public String getId() {
+        java.lang.Object ref = id_;
+        if (!(ref instanceof String)) {
+          String s = ((com.google.protobuf.ByteString) ref).toStringUtf8();
+          id_ = s;
+          return s;
+        } else {
+          return (String) ref;
+        }
+      }
+      public Builder setId(String value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000001;
+        id_ = value;
+        onChanged();
+        return this;
+      }
+      public Builder clearId() {
+        bitField0_ = (bitField0_ & ~0x00000001);
+        id_ = getDefaultInstance().getId();
+        onChanged();
+        return this;
+      }
+      void setId(com.google.protobuf.ByteString value) {
+        bitField0_ |= 0x00000001;
+        id_ = value;
+        onChanged();
+      }
+      
+      // required string data = 2;
+      private java.lang.Object data_ = "";
+      public boolean hasData() {
+        return ((bitField0_ & 0x00000002) == 0x00000002);
+      }
+      public String getData() {
+        java.lang.Object ref = data_;
+        if (!(ref instanceof String)) {
+          String s = ((com.google.protobuf.ByteString) ref).toStringUtf8();
+          data_ = s;
+          return s;
+        } else {
+          return (String) ref;
+        }
+      }
+      public Builder setData(String value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000002;
+        data_ = value;
+        onChanged();
+        return this;
+      }
+      public Builder clearData() {
+        bitField0_ = (bitField0_ & ~0x00000002);
+        data_ = getDefaultInstance().getData();
+        onChanged();
+        return this;
+      }
+      void setData(com.google.protobuf.ByteString value) {
+        bitField0_ |= 0x00000002;
+        data_ = value;
+        onChanged();
+      }
+      
+      // required int64 revision = 3;
+      private long revision_ ;
+      public boolean hasRevision() {
+        return ((bitField0_ & 0x00000004) == 0x00000004);
+      }
+      public long getRevision() {
+        return revision_;
+      }
+      public Builder setRevision(long value) {
+        bitField0_ |= 0x00000004;
+        revision_ = value;
+        onChanged();
+        return this;
+      }
+      public Builder clearRevision() {
+        bitField0_ = (bitField0_ & ~0x00000004);
+        revision_ = 0L;
+        onChanged();
+        return this;
+      }
+      
+      // @@protoc_insertion_point(builder_scope:com.orbekk.same.Component)
+    }
+    
+    static {
+      defaultInstance = new Component(true);
+      defaultInstance.initFields();
+    }
+    
+    // @@protoc_insertion_point(class_scope:com.orbekk.same.Component)
+  }
+  
+  public interface MasterStateOrBuilder
+      extends com.google.protobuf.MessageOrBuilder {
+    
+    // optional string master_url = 1;
+    boolean hasMasterUrl();
+    String getMasterUrl();
+    
+    // optional int32 master_id = 2;
+    boolean hasMasterId();
+    int getMasterId();
+    
+    // optional string network_name = 3;
+    boolean hasNetworkName();
+    String getNetworkName();
+  }
+  public static final class MasterState extends
+      com.google.protobuf.GeneratedMessage
+      implements MasterStateOrBuilder {
+    // Use MasterState.newBuilder() to construct.
+    private MasterState(Builder builder) {
+      super(builder);
+    }
+    private MasterState(boolean noInit) {}
+    
+    private static final MasterState defaultInstance;
+    public static MasterState getDefaultInstance() {
+      return defaultInstance;
+    }
+    
+    public MasterState getDefaultInstanceForType() {
+      return defaultInstance;
+    }
+    
+    public static final com.google.protobuf.Descriptors.Descriptor
+        getDescriptor() {
+      return com.orbekk.same.Services.internal_static_com_orbekk_same_MasterState_descriptor;
+    }
+    
+    protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+        internalGetFieldAccessorTable() {
+      return com.orbekk.same.Services.internal_static_com_orbekk_same_MasterState_fieldAccessorTable;
+    }
+    
+    private int bitField0_;
+    // optional string master_url = 1;
+    public static final int MASTER_URL_FIELD_NUMBER = 1;
+    private java.lang.Object masterUrl_;
+    public boolean hasMasterUrl() {
+      return ((bitField0_ & 0x00000001) == 0x00000001);
+    }
+    public String getMasterUrl() {
+      java.lang.Object ref = masterUrl_;
+      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)) {
+          masterUrl_ = s;
+        }
+        return s;
+      }
+    }
+    private com.google.protobuf.ByteString getMasterUrlBytes() {
+      java.lang.Object ref = masterUrl_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b = 
+            com.google.protobuf.ByteString.copyFromUtf8((String) ref);
+        masterUrl_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    
+    // optional int32 master_id = 2;
+    public static final int MASTER_ID_FIELD_NUMBER = 2;
+    private int masterId_;
+    public boolean hasMasterId() {
+      return ((bitField0_ & 0x00000002) == 0x00000002);
+    }
+    public int getMasterId() {
+      return masterId_;
+    }
+    
+    // optional string network_name = 3;
+    public static final int NETWORK_NAME_FIELD_NUMBER = 3;
+    private java.lang.Object networkName_;
+    public boolean hasNetworkName() {
+      return ((bitField0_ & 0x00000004) == 0x00000004);
+    }
+    public String getNetworkName() {
+      java.lang.Object ref = networkName_;
+      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)) {
+          networkName_ = s;
+        }
+        return s;
+      }
+    }
+    private com.google.protobuf.ByteString getNetworkNameBytes() {
+      java.lang.Object ref = networkName_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b = 
+            com.google.protobuf.ByteString.copyFromUtf8((String) ref);
+        networkName_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
+    
+    private void initFields() {
+      masterUrl_ = "";
+      masterId_ = 0;
+      networkName_ = "";
+    }
+    private byte memoizedIsInitialized = -1;
+    public final boolean isInitialized() {
+      byte isInitialized = memoizedIsInitialized;
+      if (isInitialized != -1) return isInitialized == 1;
+      
+      memoizedIsInitialized = 1;
+      return true;
+    }
+    
+    public void writeTo(com.google.protobuf.CodedOutputStream output)
+                        throws java.io.IOException {
+      getSerializedSize();
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        output.writeBytes(1, getMasterUrlBytes());
+      }
+      if (((bitField0_ & 0x00000002) == 0x00000002)) {
+        output.writeInt32(2, masterId_);
+      }
+      if (((bitField0_ & 0x00000004) == 0x00000004)) {
+        output.writeBytes(3, getNetworkNameBytes());
+      }
+      getUnknownFields().writeTo(output);
+    }
+    
+    private int memoizedSerializedSize = -1;
+    public int getSerializedSize() {
+      int size = memoizedSerializedSize;
+      if (size != -1) return size;
+    
+      size = 0;
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeBytesSize(1, getMasterUrlBytes());
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+      if (((bitField0_ & 0x00000002) == 0x00000002)) {
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+          .computeInt32Size(2, masterId_);
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+      if (((bitField0_ & 0x00000004) == 0x00000004)) {
+        size += com.google.protobuf.CodedOutputStream
+          .computeBytesSize(3, getNetworkNameBytes());
+      }
+      size += getUnknownFields().getSerializedSize();
+      memoizedSerializedSize = size;
+      return size;
+    }
+    
+    private static final long serialVersionUID = 0L;
+    @java.lang.Override
+    protected java.lang.Object writeReplace()
+        throws java.io.ObjectStreamException {
+      return super.writeReplace();
+    }
+    
+    public static com.orbekk.same.Services.MasterState parseFrom(
+        com.google.protobuf.ByteString data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return newBuilder().mergeFrom(data).buildParsed();
+    }
+    public static com.orbekk.same.Services.MasterState parseFrom(
+        com.google.protobuf.ByteString data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return newBuilder().mergeFrom(data, extensionRegistry)
+               .buildParsed();
+    }
+    public static com.orbekk.same.Services.MasterState parseFrom(byte[] data)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return newBuilder().mergeFrom(data).buildParsed();
+    }
+    public static com.orbekk.same.Services.MasterState parseFrom(
+        byte[] data,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws com.google.protobuf.InvalidProtocolBufferException {
+      return newBuilder().mergeFrom(data, extensionRegistry)
+               .buildParsed();
+    }
+    public static com.orbekk.same.Services.MasterState parseFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      return newBuilder().mergeFrom(input).buildParsed();
+    }
+    public static com.orbekk.same.Services.MasterState parseFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return newBuilder().mergeFrom(input, extensionRegistry)
+               .buildParsed();
+    }
+    public static com.orbekk.same.Services.MasterState parseDelimitedFrom(java.io.InputStream input)
+        throws java.io.IOException {
+      Builder builder = newBuilder();
+      if (builder.mergeDelimitedFrom(input)) {
+        return builder.buildParsed();
+      } else {
+        return null;
+      }
+    }
+    public static com.orbekk.same.Services.MasterState parseDelimitedFrom(
+        java.io.InputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      Builder builder = newBuilder();
+      if (builder.mergeDelimitedFrom(input, extensionRegistry)) {
+        return builder.buildParsed();
+      } else {
+        return null;
+      }
+    }
+    public static com.orbekk.same.Services.MasterState parseFrom(
+        com.google.protobuf.CodedInputStream input)
+        throws java.io.IOException {
+      return newBuilder().mergeFrom(input).buildParsed();
+    }
+    public static com.orbekk.same.Services.MasterState parseFrom(
+        com.google.protobuf.CodedInputStream input,
+        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+        throws java.io.IOException {
+      return newBuilder().mergeFrom(input, extensionRegistry)
+               .buildParsed();
+    }
+    
+    public static Builder newBuilder() { return Builder.create(); }
+    public Builder newBuilderForType() { return newBuilder(); }
+    public static Builder newBuilder(com.orbekk.same.Services.MasterState prototype) {
+      return newBuilder().mergeFrom(prototype);
+    }
+    public Builder toBuilder() { return newBuilder(this); }
+    
+    @java.lang.Override
+    protected Builder newBuilderForType(
+        com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+      Builder builder = new Builder(parent);
+      return builder;
+    }
+    public static final class Builder extends
+        com.google.protobuf.GeneratedMessage.Builder<Builder>
+       implements com.orbekk.same.Services.MasterStateOrBuilder {
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return com.orbekk.same.Services.internal_static_com_orbekk_same_MasterState_descriptor;
+      }
+      
+      protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return com.orbekk.same.Services.internal_static_com_orbekk_same_MasterState_fieldAccessorTable;
+      }
+      
+      // Construct using com.orbekk.same.Services.MasterState.newBuilder()
+      private Builder() {
+        maybeForceBuilderInitialization();
+      }
+      
+      private Builder(BuilderParent parent) {
+        super(parent);
+        maybeForceBuilderInitialization();
+      }
+      private void maybeForceBuilderInitialization() {
+        if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
+        }
+      }
+      private static Builder create() {
+        return new Builder();
+      }
+      
+      public Builder clear() {
+        super.clear();
+        masterUrl_ = "";
+        bitField0_ = (bitField0_ & ~0x00000001);
+        masterId_ = 0;
+        bitField0_ = (bitField0_ & ~0x00000002);
+        networkName_ = "";
+        bitField0_ = (bitField0_ & ~0x00000004);
+        return this;
+      }
+      
+      public Builder clone() {
+        return create().mergeFrom(buildPartial());
+      }
+      
+      public com.google.protobuf.Descriptors.Descriptor
+          getDescriptorForType() {
+        return com.orbekk.same.Services.MasterState.getDescriptor();
+      }
+      
+      public com.orbekk.same.Services.MasterState getDefaultInstanceForType() {
+        return com.orbekk.same.Services.MasterState.getDefaultInstance();
+      }
+      
+      public com.orbekk.same.Services.MasterState build() {
+        com.orbekk.same.Services.MasterState result = buildPartial();
+        if (!result.isInitialized()) {
+          throw newUninitializedMessageException(result);
+        }
+        return result;
+      }
+      
+      private com.orbekk.same.Services.MasterState buildParsed()
+          throws com.google.protobuf.InvalidProtocolBufferException {
+        com.orbekk.same.Services.MasterState result = buildPartial();
+        if (!result.isInitialized()) {
+          throw newUninitializedMessageException(
+            result).asInvalidProtocolBufferException();
+        }
+        return result;
+      }
+      
+      public com.orbekk.same.Services.MasterState buildPartial() {
+        com.orbekk.same.Services.MasterState result = new com.orbekk.same.Services.MasterState(this);
+        int from_bitField0_ = bitField0_;
+        int to_bitField0_ = 0;
+        if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
+          to_bitField0_ |= 0x00000001;
+        }
+        result.masterUrl_ = masterUrl_;
+        if (((from_bitField0_ & 0x00000002) == 0x00000002)) {
+          to_bitField0_ |= 0x00000002;
+        }
+        result.masterId_ = masterId_;
+        if (((from_bitField0_ & 0x00000004) == 0x00000004)) {
+          to_bitField0_ |= 0x00000004;
+        }
+        result.networkName_ = networkName_;
+        result.bitField0_ = to_bitField0_;
+        onBuilt();
+        return result;
+      }
+      
+      public Builder mergeFrom(com.google.protobuf.Message other) {
+        if (other instanceof com.orbekk.same.Services.MasterState) {
+          return mergeFrom((com.orbekk.same.Services.MasterState)other);
+        } else {
+          super.mergeFrom(other);
+          return this;
+        }
+      }
+      
+      public Builder mergeFrom(com.orbekk.same.Services.MasterState other) {
+        if (other == com.orbekk.same.Services.MasterState.getDefaultInstance()) return this;
+        if (other.hasMasterUrl()) {
+          setMasterUrl(other.getMasterUrl());
+        }
+        if (other.hasMasterId()) {
+          setMasterId(other.getMasterId());
+        }
+        if (other.hasNetworkName()) {
+          setNetworkName(other.getNetworkName());
+        }
+        this.mergeUnknownFields(other.getUnknownFields());
+        return this;
+      }
+      
+      public final boolean isInitialized() {
+        return true;
+      }
+      
+      public Builder mergeFrom(
+          com.google.protobuf.CodedInputStream input,
+          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
+          throws java.io.IOException {
+        com.google.protobuf.UnknownFieldSet.Builder unknownFields =
+          com.google.protobuf.UnknownFieldSet.newBuilder(
+            this.getUnknownFields());
+        while (true) {
+          int tag = input.readTag();
+          switch (tag) {
+            case 0:
+              this.setUnknownFields(unknownFields.build());
+              onChanged();
+              return this;
+            default: {
+              if (!parseUnknownField(input, unknownFields,
+                                     extensionRegistry, tag)) {
+                this.setUnknownFields(unknownFields.build());
+                onChanged();
+                return this;
+              }
+              break;
+            }
+            case 10: {
+              bitField0_ |= 0x00000001;
+              masterUrl_ = input.readBytes();
+              break;
+            }
+            case 16: {
+              bitField0_ |= 0x00000002;
+              masterId_ = input.readInt32();
+              break;
+            }
+            case 26: {
+              bitField0_ |= 0x00000004;
+              networkName_ = input.readBytes();
+              break;
+            }
+          }
+        }
+      }
+      
+      private int bitField0_;
+      
+      // optional string master_url = 1;
+      private java.lang.Object masterUrl_ = "";
+      public boolean hasMasterUrl() {
+        return ((bitField0_ & 0x00000001) == 0x00000001);
+      }
+      public String getMasterUrl() {
+        java.lang.Object ref = masterUrl_;
+        if (!(ref instanceof String)) {
+          String s = ((com.google.protobuf.ByteString) ref).toStringUtf8();
+          masterUrl_ = s;
+          return s;
+        } else {
+          return (String) ref;
+        }
+      }
+      public Builder setMasterUrl(String value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000001;
+        masterUrl_ = value;
+        onChanged();
+        return this;
+      }
+      public Builder clearMasterUrl() {
+        bitField0_ = (bitField0_ & ~0x00000001);
+        masterUrl_ = getDefaultInstance().getMasterUrl();
+        onChanged();
+        return this;
+      }
+      void setMasterUrl(com.google.protobuf.ByteString value) {
+        bitField0_ |= 0x00000001;
+        masterUrl_ = value;
+        onChanged();
+      }
+      
+      // optional int32 master_id = 2;
+      private int masterId_ ;
+      public boolean hasMasterId() {
+        return ((bitField0_ & 0x00000002) == 0x00000002);
+      }
+      public int getMasterId() {
+        return masterId_;
+      }
+      public Builder setMasterId(int value) {
+        bitField0_ |= 0x00000002;
+        masterId_ = value;
+        onChanged();
+        return this;
+      }
+      public Builder clearMasterId() {
+        bitField0_ = (bitField0_ & ~0x00000002);
+        masterId_ = 0;
+        onChanged();
+        return this;
+      }
+      
+      // optional string network_name = 3;
+      private java.lang.Object networkName_ = "";
+      public boolean hasNetworkName() {
+        return ((bitField0_ & 0x00000004) == 0x00000004);
+      }
+      public String getNetworkName() {
+        java.lang.Object ref = networkName_;
+        if (!(ref instanceof String)) {
+          String s = ((com.google.protobuf.ByteString) ref).toStringUtf8();
+          networkName_ = s;
+          return s;
+        } else {
+          return (String) ref;
+        }
+      }
+      public Builder setNetworkName(String value) {
+        if (value == null) {
+    throw new NullPointerException();
+  }
+  bitField0_ |= 0x00000004;
+        networkName_ = value;
+        onChanged();
+        return this;
+      }
+      public Builder clearNetworkName() {
+        bitField0_ = (bitField0_ & ~0x00000004);
+        networkName_ = getDefaultInstance().getNetworkName();
+        onChanged();
+        return this;
+      }
+      void setNetworkName(com.google.protobuf.ByteString value) {
+        bitField0_ |= 0x00000004;
+        networkName_ = value;
+        onChanged();
+      }
+      
+      // @@protoc_insertion_point(builder_scope:com.orbekk.same.MasterState)
+    }
+    
+    static {
+      defaultInstance = new MasterState(true);
+      defaultInstance.initFields();
+    }
+    
+    // @@protoc_insertion_point(class_scope:com.orbekk.same.MasterState)
+  }
+  
+  public static abstract class Client
+      implements com.google.protobuf.Service {
+    protected Client() {}
+    
+    public interface Interface {
+      public abstract void setState(
+          com.google.protobuf.RpcController controller,
+          com.orbekk.same.Services.Component request,
+          com.google.protobuf.RpcCallback<com.orbekk.same.Services.Empty> done);
+      
+      public abstract void masterTakeover(
+          com.google.protobuf.RpcController controller,
+          com.orbekk.same.Services.MasterState request,
+          com.google.protobuf.RpcCallback<com.orbekk.same.Services.Empty> done);
+      
+      public abstract void masterDown(
+          com.google.protobuf.RpcController controller,
+          com.orbekk.same.Services.MasterState request,
+          com.google.protobuf.RpcCallback<com.orbekk.same.Services.Empty> done);
+      
+    }
+    
+    public static com.google.protobuf.Service newReflectiveService(
+        final Interface impl) {
+      return new Client() {
+        @java.lang.Override
+        public  void setState(
+            com.google.protobuf.RpcController controller,
+            com.orbekk.same.Services.Component request,
+            com.google.protobuf.RpcCallback<com.orbekk.same.Services.Empty> done) {
+          impl.setState(controller, request, done);
+        }
+        
+        @java.lang.Override
+        public  void masterTakeover(
+            com.google.protobuf.RpcController controller,
+            com.orbekk.same.Services.MasterState request,
+            com.google.protobuf.RpcCallback<com.orbekk.same.Services.Empty> done) {
+          impl.masterTakeover(controller, request, done);
+        }
+        
+        @java.lang.Override
+        public  void masterDown(
+            com.google.protobuf.RpcController controller,
+            com.orbekk.same.Services.MasterState request,
+            com.google.protobuf.RpcCallback<com.orbekk.same.Services.Empty> done) {
+          impl.masterDown(controller, request, done);
+        }
+        
+      };
+    }
+    
+    public static com.google.protobuf.BlockingService
+        newReflectiveBlockingService(final BlockingInterface impl) {
+      return new com.google.protobuf.BlockingService() {
+        public final com.google.protobuf.Descriptors.ServiceDescriptor
+            getDescriptorForType() {
+          return getDescriptor();
+        }
+        
+        public final com.google.protobuf.Message callBlockingMethod(
+            com.google.protobuf.Descriptors.MethodDescriptor method,
+            com.google.protobuf.RpcController controller,
+            com.google.protobuf.Message request)
+            throws com.google.protobuf.ServiceException {
+          if (method.getService() != getDescriptor()) {
+            throw new java.lang.IllegalArgumentException(
+              "Service.callBlockingMethod() given method descriptor for " +
+              "wrong service type.");
+          }
+          switch(method.getIndex()) {
+            case 0:
+              return impl.setState(controller, (com.orbekk.same.Services.Component)request);
+            case 1:
+              return impl.masterTakeover(controller, (com.orbekk.same.Services.MasterState)request);
+            case 2:
+              return impl.masterDown(controller, (com.orbekk.same.Services.MasterState)request);
+            default:
+              throw new java.lang.AssertionError("Can't get here.");
+          }
+        }
+        
+        public final com.google.protobuf.Message
+            getRequestPrototype(
+            com.google.protobuf.Descriptors.MethodDescriptor method) {
+          if (method.getService() != getDescriptor()) {
+            throw new java.lang.IllegalArgumentException(
+              "Service.getRequestPrototype() given method " +
+              "descriptor for wrong service type.");
+          }
+          switch(method.getIndex()) {
+            case 0:
+              return com.orbekk.same.Services.Component.getDefaultInstance();
+            case 1:
+              return com.orbekk.same.Services.MasterState.getDefaultInstance();
+            case 2:
+              return com.orbekk.same.Services.MasterState.getDefaultInstance();
+            default:
+              throw new java.lang.AssertionError("Can't get here.");
+          }
+        }
+        
+        public final com.google.protobuf.Message
+            getResponsePrototype(
+            com.google.protobuf.Descriptors.MethodDescriptor method) {
+          if (method.getService() != getDescriptor()) {
+            throw new java.lang.IllegalArgumentException(
+              "Service.getResponsePrototype() given method " +
+              "descriptor for wrong service type.");
+          }
+          switch(method.getIndex()) {
+            case 0:
+              return com.orbekk.same.Services.Empty.getDefaultInstance();
+            case 1:
+              return com.orbekk.same.Services.Empty.getDefaultInstance();
+            case 2:
+              return com.orbekk.same.Services.Empty.getDefaultInstance();
+            default:
+              throw new java.lang.AssertionError("Can't get here.");
+          }
+        }
+        
+      };
+    }
+    
+    public abstract void setState(
+        com.google.protobuf.RpcController controller,
+        com.orbekk.same.Services.Component request,
+        com.google.protobuf.RpcCallback<com.orbekk.same.Services.Empty> done);
+    
+    public abstract void masterTakeover(
+        com.google.protobuf.RpcController controller,
+        com.orbekk.same.Services.MasterState request,
+        com.google.protobuf.RpcCallback<com.orbekk.same.Services.Empty> done);
+    
+    public abstract void masterDown(
+        com.google.protobuf.RpcController controller,
+        com.orbekk.same.Services.MasterState request,
+        com.google.protobuf.RpcCallback<com.orbekk.same.Services.Empty> done);
+    
+    public static final
+        com.google.protobuf.Descriptors.ServiceDescriptor
+        getDescriptor() {
+      return com.orbekk.same.Services.getDescriptor().getServices().get(0);
+    }
+    public final com.google.protobuf.Descriptors.ServiceDescriptor
+        getDescriptorForType() {
+      return getDescriptor();
+    }
+    
+    public final void callMethod(
+        com.google.protobuf.Descriptors.MethodDescriptor method,
+        com.google.protobuf.RpcController controller,
+        com.google.protobuf.Message request,
+        com.google.protobuf.RpcCallback<
+          com.google.protobuf.Message> done) {
+      if (method.getService() != getDescriptor()) {
+        throw new java.lang.IllegalArgumentException(
+          "Service.callMethod() given method descriptor for wrong " +
+          "service type.");
+      }
+      switch(method.getIndex()) {
+        case 0:
+          this.setState(controller, (com.orbekk.same.Services.Component)request,
+            com.google.protobuf.RpcUtil.<com.orbekk.same.Services.Empty>specializeCallback(
+              done));
+          return;
+        case 1:
+          this.masterTakeover(controller, (com.orbekk.same.Services.MasterState)request,
+            com.google.protobuf.RpcUtil.<com.orbekk.same.Services.Empty>specializeCallback(
+              done));
+          return;
+        case 2:
+          this.masterDown(controller, (com.orbekk.same.Services.MasterState)request,
+            com.google.protobuf.RpcUtil.<com.orbekk.same.Services.Empty>specializeCallback(
+              done));
+          return;
+        default:
+          throw new java.lang.AssertionError("Can't get here.");
+      }
+    }
+    
+    public final com.google.protobuf.Message
+        getRequestPrototype(
+        com.google.protobuf.Descriptors.MethodDescriptor method) {
+      if (method.getService() != getDescriptor()) {
+        throw new java.lang.IllegalArgumentException(
+          "Service.getRequestPrototype() given method " +
+          "descriptor for wrong service type.");
+      }
+      switch(method.getIndex()) {
+        case 0:
+          return com.orbekk.same.Services.Component.getDefaultInstance();
+        case 1:
+          return com.orbekk.same.Services.MasterState.getDefaultInstance();
+        case 2:
+          return com.orbekk.same.Services.MasterState.getDefaultInstance();
+        default:
+          throw new java.lang.AssertionError("Can't get here.");
+      }
+    }
+    
+    public final com.google.protobuf.Message
+        getResponsePrototype(
+        com.google.protobuf.Descriptors.MethodDescriptor method) {
+      if (method.getService() != getDescriptor()) {
+        throw new java.lang.IllegalArgumentException(
+          "Service.getResponsePrototype() given method " +
+          "descriptor for wrong service type.");
+      }
+      switch(method.getIndex()) {
+        case 0:
+          return com.orbekk.same.Services.Empty.getDefaultInstance();
+        case 1:
+          return com.orbekk.same.Services.Empty.getDefaultInstance();
+        case 2:
+          return com.orbekk.same.Services.Empty.getDefaultInstance();
+        default:
+          throw new java.lang.AssertionError("Can't get here.");
+      }
+    }
+    
+    public static Stub newStub(
+        com.google.protobuf.RpcChannel channel) {
+      return new Stub(channel);
+    }
+    
+    public static final class Stub extends com.orbekk.same.Services.Client implements Interface {
+      private Stub(com.google.protobuf.RpcChannel channel) {
+        this.channel = channel;
+      }
+      
+      private final com.google.protobuf.RpcChannel channel;
+      
+      public com.google.protobuf.RpcChannel getChannel() {
+        return channel;
+      }
+      
+      public  void setState(
+          com.google.protobuf.RpcController controller,
+          com.orbekk.same.Services.Component request,
+          com.google.protobuf.RpcCallback<com.orbekk.same.Services.Empty> done) {
+        channel.callMethod(
+          getDescriptor().getMethods().get(0),
+          controller,
+          request,
+          com.orbekk.same.Services.Empty.getDefaultInstance(),
+          com.google.protobuf.RpcUtil.generalizeCallback(
+            done,
+            com.orbekk.same.Services.Empty.class,
+            com.orbekk.same.Services.Empty.getDefaultInstance()));
+      }
+      
+      public  void masterTakeover(
+          com.google.protobuf.RpcController controller,
+          com.orbekk.same.Services.MasterState request,
+          com.google.protobuf.RpcCallback<com.orbekk.same.Services.Empty> done) {
+        channel.callMethod(
+          getDescriptor().getMethods().get(1),
+          controller,
+          request,
+          com.orbekk.same.Services.Empty.getDefaultInstance(),
+          com.google.protobuf.RpcUtil.generalizeCallback(
+            done,
+            com.orbekk.same.Services.Empty.class,
+            com.orbekk.same.Services.Empty.getDefaultInstance()));
+      }
+      
+      public  void masterDown(
+          com.google.protobuf.RpcController controller,
+          com.orbekk.same.Services.MasterState request,
+          com.google.protobuf.RpcCallback<com.orbekk.same.Services.Empty> done) {
+        channel.callMethod(
+          getDescriptor().getMethods().get(2),
+          controller,
+          request,
+          com.orbekk.same.Services.Empty.getDefaultInstance(),
+          com.google.protobuf.RpcUtil.generalizeCallback(
+            done,
+            com.orbekk.same.Services.Empty.class,
+            com.orbekk.same.Services.Empty.getDefaultInstance()));
+      }
+    }
+    
+    public static BlockingInterface newBlockingStub(
+        com.google.protobuf.BlockingRpcChannel channel) {
+      return new BlockingStub(channel);
+    }
+    
+    public interface BlockingInterface {
+      public com.orbekk.same.Services.Empty setState(
+          com.google.protobuf.RpcController controller,
+          com.orbekk.same.Services.Component request)
+          throws com.google.protobuf.ServiceException;
+      
+      public com.orbekk.same.Services.Empty masterTakeover(
+          com.google.protobuf.RpcController controller,
+          com.orbekk.same.Services.MasterState request)
+          throws com.google.protobuf.ServiceException;
+      
+      public com.orbekk.same.Services.Empty masterDown(
+          com.google.protobuf.RpcController controller,
+          com.orbekk.same.Services.MasterState request)
+          throws com.google.protobuf.ServiceException;
+    }
+    
+    private static final class BlockingStub implements BlockingInterface {
+      private BlockingStub(com.google.protobuf.BlockingRpcChannel channel) {
+        this.channel = channel;
+      }
+      
+      private final com.google.protobuf.BlockingRpcChannel channel;
+      
+      public com.orbekk.same.Services.Empty setState(
+          com.google.protobuf.RpcController controller,
+          com.orbekk.same.Services.Component request)
+          throws com.google.protobuf.ServiceException {
+        return (com.orbekk.same.Services.Empty) channel.callBlockingMethod(
+          getDescriptor().getMethods().get(0),
+          controller,
+          request,
+          com.orbekk.same.Services.Empty.getDefaultInstance());
+      }
+      
+      
+      public com.orbekk.same.Services.Empty masterTakeover(
+          com.google.protobuf.RpcController controller,
+          com.orbekk.same.Services.MasterState request)
+          throws com.google.protobuf.ServiceException {
+        return (com.orbekk.same.Services.Empty) channel.callBlockingMethod(
+          getDescriptor().getMethods().get(1),
+          controller,
+          request,
+          com.orbekk.same.Services.Empty.getDefaultInstance());
+      }
+      
+      
+      public com.orbekk.same.Services.Empty masterDown(
+          com.google.protobuf.RpcController controller,
+          com.orbekk.same.Services.MasterState request)
+          throws com.google.protobuf.ServiceException {
+        return (com.orbekk.same.Services.Empty) channel.callBlockingMethod(
+          getDescriptor().getMethods().get(2),
+          controller,
+          request,
+          com.orbekk.same.Services.Empty.getDefaultInstance());
+      }
+      
+    }
+  }
+  
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_com_orbekk_same_Empty_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_com_orbekk_same_Empty_fieldAccessorTable;
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_com_orbekk_same_Component_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_com_orbekk_same_Component_fieldAccessorTable;
+  private static com.google.protobuf.Descriptors.Descriptor
+    internal_static_com_orbekk_same_MasterState_descriptor;
+  private static
+    com.google.protobuf.GeneratedMessage.FieldAccessorTable
+      internal_static_com_orbekk_same_MasterState_fieldAccessorTable;
+  
+  public static com.google.protobuf.Descriptors.FileDescriptor
+      getDescriptor() {
+    return descriptor;
+  }
+  private static com.google.protobuf.Descriptors.FileDescriptor
+      descriptor;
+  static {
+    java.lang.String[] descriptorData = {
+      "\n,src/main/java/com/orbekk/same/services" +
+      ".proto\022\017com.orbekk.same\"\007\n\005Empty\"7\n\tComp" +
+      "onent\022\n\n\002id\030\001 \002(\t\022\014\n\004data\030\002 \002(\t\022\020\n\010revis" +
+      "ion\030\003 \002(\003\"J\n\013MasterState\022\022\n\nmaster_url\030\001" +
+      " \001(\t\022\021\n\tmaster_id\030\002 \001(\005\022\024\n\014network_name\030" +
+      "\003 \001(\t2\324\001\n\006Client\022>\n\010SetState\022\032.com.orbek" +
+      "k.same.Component\032\026.com.orbekk.same.Empty" +
+      "\022F\n\016MasterTakeover\022\034.com.orbekk.same.Mas" +
+      "terState\032\026.com.orbekk.same.Empty\022B\n\nMast" +
+      "erDown\022\034.com.orbekk.same.MasterState\032\026.c",
+      "om.orbekk.same.EmptyB\003\210\001\001"
+    };
+    com.google.protobuf.Descriptors.FileDescriptor.InternalDescriptorAssigner assigner =
+      new com.google.protobuf.Descriptors.FileDescriptor.InternalDescriptorAssigner() {
+        public com.google.protobuf.ExtensionRegistry assignDescriptors(
+            com.google.protobuf.Descriptors.FileDescriptor root) {
+          descriptor = root;
+          internal_static_com_orbekk_same_Empty_descriptor =
+            getDescriptor().getMessageTypes().get(0);
+          internal_static_com_orbekk_same_Empty_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+              internal_static_com_orbekk_same_Empty_descriptor,
+              new java.lang.String[] { },
+              com.orbekk.same.Services.Empty.class,
+              com.orbekk.same.Services.Empty.Builder.class);
+          internal_static_com_orbekk_same_Component_descriptor =
+            getDescriptor().getMessageTypes().get(1);
+          internal_static_com_orbekk_same_Component_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+              internal_static_com_orbekk_same_Component_descriptor,
+              new java.lang.String[] { "Id", "Data", "Revision", },
+              com.orbekk.same.Services.Component.class,
+              com.orbekk.same.Services.Component.Builder.class);
+          internal_static_com_orbekk_same_MasterState_descriptor =
+            getDescriptor().getMessageTypes().get(2);
+          internal_static_com_orbekk_same_MasterState_fieldAccessorTable = new
+            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
+              internal_static_com_orbekk_same_MasterState_descriptor,
+              new java.lang.String[] { "MasterUrl", "MasterId", "NetworkName", },
+              com.orbekk.same.Services.MasterState.class,
+              com.orbekk.same.Services.MasterState.Builder.class);
+          return null;
+        }
+      };
+    com.google.protobuf.Descriptors.FileDescriptor
+      .internalBuildGeneratedFileFrom(descriptorData,
+        new com.google.protobuf.Descriptors.FileDescriptor[] {
+        }, assigner);
+  }
+  
+  // @@protoc_insertion_point(outer_class_scope)
+}
diff --git a/same/src/main/java/com/orbekk/same/benchmark/Example.java b/same/src/main/java/com/orbekk/same/benchmark/Example.java
index c71ed0a..5b75620 100644
--- a/same/src/main/java/com/orbekk/same/benchmark/Example.java
+++ b/same/src/main/java/com/orbekk/same/benchmark/Example.java
@@ -8,11 +8,27 @@ public final class Example {
   public static void registerAllExtensions(
       com.google.protobuf.ExtensionRegistry registry) {
   }
+  public interface DataOrBuilder
+      extends com.google.protobuf.MessageOrBuilder {
+    
+    // optional string message = 1;
+    boolean hasMessage();
+    String getMessage();
+    
+    // optional int32 arg1 = 2;
+    boolean hasArg1();
+    int getArg1();
+    
+    // optional int32 arg2 = 3;
+    boolean hasArg2();
+    int getArg2();
+  }
   public static final class Data extends
-      com.google.protobuf.GeneratedMessage {
+      com.google.protobuf.GeneratedMessage
+      implements DataOrBuilder {
     // Use Data.newBuilder() to construct.
-    private Data() {
-      initFields();
+    private Data(Builder builder) {
+      super(builder);
     }
     private Data(boolean noInit) {}
     
@@ -35,44 +51,84 @@ public final class Example {
       return com.orbekk.same.benchmark.Example.internal_static_com_orbekk_same_benchmark_Data_fieldAccessorTable;
     }
     
+    private int bitField0_;
     // optional string message = 1;
     public static final int MESSAGE_FIELD_NUMBER = 1;
-    private boolean hasMessage;
-    private java.lang.String message_ = "";
-    public boolean hasMessage() { return hasMessage; }
-    public java.lang.String getMessage() { return message_; }
+    private java.lang.Object message_;
+    public boolean hasMessage() {
+      return ((bitField0_ & 0x00000001) == 0x00000001);
+    }
+    public String getMessage() {
+      java.lang.Object ref = message_;
+      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)) {
+          message_ = s;
+        }
+        return s;
+      }
+    }
+    private com.google.protobuf.ByteString getMessageBytes() {
+      java.lang.Object ref = message_;
+      if (ref instanceof String) {
+        com.google.protobuf.ByteString b = 
+            com.google.protobuf.ByteString.copyFromUtf8((String) ref);
+        message_ = b;
+        return b;
+      } else {
+        return (com.google.protobuf.ByteString) ref;
+      }
+    }
     
     // optional int32 arg1 = 2;
     public static final int ARG1_FIELD_NUMBER = 2;
-    private boolean hasArg1;
-    private int arg1_ = 0;
-    public boolean hasArg1() { return hasArg1; }
-    public int getArg1() { return arg1_; }
+    private int arg1_;
+    public boolean hasArg1() {
+      return ((bitField0_ & 0x00000002) == 0x00000002);
+    }
+    public int getArg1() {
+      return arg1_;
+    }
     
     // optional int32 arg2 = 3;
     public static final int ARG2_FIELD_NUMBER = 3;
-    private boolean hasArg2;
-    private int arg2_ = 0;
-    public boolean hasArg2() { return hasArg2; }
-    public int getArg2() { return arg2_; }
+    private int arg2_;
+    public boolean hasArg2() {
+      return ((bitField0_ & 0x00000004) == 0x00000004);
+    }
+    public int getArg2() {
+      return arg2_;
+    }
     
     private void initFields() {
+      message_ = "";
+      arg1_ = 0;
+      arg2_ = 0;
     }
+    private byte memoizedIsInitialized = -1;
     public final boolean isInitialized() {
+      byte isInitialized = memoizedIsInitialized;
+      if (isInitialized != -1) return isInitialized == 1;
+      
+      memoizedIsInitialized = 1;
       return true;
     }
     
     public void writeTo(com.google.protobuf.CodedOutputStream output)
                         throws java.io.IOException {
       getSerializedSize();
-      if (hasMessage()) {
-        output.writeString(1, getMessage());
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
+        output.writeBytes(1, getMessageBytes());
       }
-      if (hasArg1()) {
-        output.writeInt32(2, getArg1());
+      if (((bitField0_ & 0x00000002) == 0x00000002)) {
+        output.writeInt32(2, arg1_);
       }
-      if (hasArg2()) {
-        output.writeInt32(3, getArg2());
+      if (((bitField0_ & 0x00000004) == 0x00000004)) {
+        output.writeInt32(3, arg2_);
       }
       getUnknownFields().writeTo(output);
     }
@@ -83,23 +139,30 @@ public final class Example {
       if (size != -1) return size;
     
       size = 0;
-      if (hasMessage()) {
+      if (((bitField0_ & 0x00000001) == 0x00000001)) {
         size += com.google.protobuf.CodedOutputStream
-          .computeStringSize(1, getMessage());
+          .computeBytesSize(1, getMessageBytes());
       }
-      if (hasArg1()) {
+      if (((bitField0_ & 0x00000002) == 0x00000002)) {
         size += com.google.protobuf.CodedOutputStream
-          .computeInt32Size(2, getArg1());
+          .computeInt32Size(2, arg1_);
       }
-      if (hasArg2()) {
+      if (((bitField0_ & 0x00000004) == 0x00000004)) {
         size += com.google.protobuf.CodedOutputStream
-          .computeInt32Size(3, getArg2());
+          .computeInt32Size(3, arg2_);
       }
       size += getUnknownFields().getSerializedSize();
       memoizedSerializedSize = size;
       return size;
     }
     
+    private static final long serialVersionUID = 0L;
+    @java.lang.Override
+    protected java.lang.Object writeReplace()
+        throws java.io.ObjectStreamException {
+      return super.writeReplace();
+    }
+    
     public static com.orbekk.same.benchmark.Example.Data parseFrom(
         com.google.protobuf.ByteString data)
         throws com.google.protobuf.InvalidProtocolBufferException {
@@ -174,34 +237,55 @@ public final class Example {
     }
     public Builder toBuilder() { return newBuilder(this); }
     
+    @java.lang.Override
+    protected Builder newBuilderForType(
+        com.google.protobuf.GeneratedMessage.BuilderParent parent) {
+      Builder builder = new Builder(parent);
+      return builder;
+    }
     public static final class Builder extends
-        com.google.protobuf.GeneratedMessage.Builder<Builder> {
-      private com.orbekk.same.benchmark.Example.Data result;
+        com.google.protobuf.GeneratedMessage.Builder<Builder>
+       implements com.orbekk.same.benchmark.Example.DataOrBuilder {
+      public static final com.google.protobuf.Descriptors.Descriptor
+          getDescriptor() {
+        return com.orbekk.same.benchmark.Example.internal_static_com_orbekk_same_benchmark_Data_descriptor;
+      }
       
-      // Construct using com.orbekk.same.benchmark.Example.Data.newBuilder()
-      private Builder() {}
+      protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
+          internalGetFieldAccessorTable() {
+        return com.orbekk.same.benchmark.Example.internal_static_com_orbekk_same_benchmark_Data_fieldAccessorTable;
+      }
       
-      private static Builder create() {
-        Builder builder = new Builder();
-        builder.result = new com.orbekk.same.benchmark.Example.Data();
-        return builder;
+      // Construct using com.orbekk.same.benchmark.Example.Data.newBuilder()
+      private Builder() {
+        maybeForceBuilderInitialization();
       }
       
-      protected com.orbekk.same.benchmark.Example.Data internalGetResult() {
-        return result;
+      private Builder(BuilderParent parent) {
+        super(parent);
+        maybeForceBuilderInitialization();
+      }
+      private void maybeForceBuilderInitialization() {
+        if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
+        }
+      }
+      private static Builder create() {
+        return new Builder();
       }
       
       public Builder clear() {
-        if (result == null) {
-          throw new IllegalStateException(
-            "Cannot call clear() after build().");
-        }
-        result = new com.orbekk.same.benchmark.Example.Data();
+        super.clear();
+        message_ = "";
+        bitField0_ = (bitField0_ & ~0x00000001);
+        arg1_ = 0;
+        bitField0_ = (bitField0_ & ~0x00000002);
+        arg2_ = 0;
+        bitField0_ = (bitField0_ & ~0x00000004);
         return this;
       }
       
       public Builder clone() {
-        return create().mergeFrom(result);
+        return create().mergeFrom(buildPartial());
       }
       
       public com.google.protobuf.Descriptors.Descriptor
@@ -213,33 +297,43 @@ public final class Example {
         return com.orbekk.same.benchmark.Example.Data.getDefaultInstance();
       }
       
-      public boolean isInitialized() {
-        return result.isInitialized();
-      }
       public com.orbekk.same.benchmark.Example.Data build() {
-        if (result != null && !isInitialized()) {
+        com.orbekk.same.benchmark.Example.Data result = buildPartial();
+        if (!result.isInitialized()) {
           throw newUninitializedMessageException(result);
         }
-        return buildPartial();
+        return result;
       }
       
       private com.orbekk.same.benchmark.Example.Data buildParsed()
           throws com.google.protobuf.InvalidProtocolBufferException {
-        if (!isInitialized()) {
+        com.orbekk.same.benchmark.Example.Data result = buildPartial();
+        if (!result.isInitialized()) {
           throw newUninitializedMessageException(
             result).asInvalidProtocolBufferException();
         }
-        return buildPartial();
+        return result;
       }
       
       public com.orbekk.same.benchmark.Example.Data buildPartial() {
-        if (result == null) {
-          throw new IllegalStateException(
-            "build() has already been called on this Builder.");
+        com.orbekk.same.benchmark.Example.Data result = new com.orbekk.same.benchmark.Example.Data(this);
+        int from_bitField0_ = bitField0_;
+        int to_bitField0_ = 0;
+        if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
+          to_bitField0_ |= 0x00000001;
+        }
+        result.message_ = message_;
+        if (((from_bitField0_ & 0x00000002) == 0x00000002)) {
+          to_bitField0_ |= 0x00000002;
+        }
+        result.arg1_ = arg1_;
+        if (((from_bitField0_ & 0x00000004) == 0x00000004)) {
+          to_bitField0_ |= 0x00000004;
         }
-        com.orbekk.same.benchmark.Example.Data returnMe = result;
-        result = null;
-        return returnMe;
+        result.arg2_ = arg2_;
+        result.bitField0_ = to_bitField0_;
+        onBuilt();
+        return result;
       }
       
       public Builder mergeFrom(com.google.protobuf.Message other) {
@@ -266,6 +360,10 @@ public final class Example {
         return this;
       }
       
+      public final boolean isInitialized() {
+        return true;
+      }
+      
       public Builder mergeFrom(
           com.google.protobuf.CodedInputStream input,
           com.google.protobuf.ExtensionRegistryLite extensionRegistry)
@@ -278,86 +376,113 @@ public final class Example {
           switch (tag) {
             case 0:
               this.setUnknownFields(unknownFields.build());
+              onChanged();
               return this;
             default: {
               if (!parseUnknownField(input, unknownFields,
                                      extensionRegistry, tag)) {
                 this.setUnknownFields(unknownFields.build());
+                onChanged();
                 return this;
               }
               break;
             }
             case 10: {
-              setMessage(input.readString());
+              bitField0_ |= 0x00000001;
+              message_ = input.readBytes();
               break;
             }
             case 16: {
-              setArg1(input.readInt32());
+              bitField0_ |= 0x00000002;
+              arg1_ = input.readInt32();
               break;
             }
             case 24: {
-              setArg2(input.readInt32());
+              bitField0_ |= 0x00000004;
+              arg2_ = input.readInt32();
               break;
             }
           }
         }
       }
       
+      private int bitField0_;
       
       // optional string message = 1;
+      private java.lang.Object message_ = "";
       public boolean hasMessage() {
-        return result.hasMessage();
-      }
-      public java.lang.String getMessage() {
-        return result.getMessage();
+        return ((bitField0_ & 0x00000001) == 0x00000001);
+      }
+      public String getMessage() {
+        java.lang.Object ref = message_;
+        if (!(ref instanceof String)) {
+          String s = ((com.google.protobuf.ByteString) ref).toStringUtf8();
+          message_ = s;
+          return s;
+        } else {
+          return (String) ref;
+        }
       }
-      public Builder setMessage(java.lang.String value) {
+      public Builder setMessage(String value) {
         if (value == null) {
     throw new NullPointerException();
   }
-  result.hasMessage = true;
-        result.message_ = value;
+  bitField0_ |= 0x00000001;
+        message_ = value;
+        onChanged();
         return this;
       }
       public Builder clearMessage() {
-        result.hasMessage = false;
-        result.message_ = getDefaultInstance().getMessage();
+        bitField0_ = (bitField0_ & ~0x00000001);
+        message_ = getDefaultInstance().getMessage();
+        onChanged();
         return this;
       }
+      void setMessage(com.google.protobuf.ByteString value) {
+        bitField0_ |= 0x00000001;
+        message_ = value;
+        onChanged();
+      }
       
       // optional int32 arg1 = 2;
+      private int arg1_ ;
       public boolean hasArg1() {
-        return result.hasArg1();
+        return ((bitField0_ & 0x00000002) == 0x00000002);
       }
       public int getArg1() {
-        return result.getArg1();
+        return arg1_;
       }
       public Builder setArg1(int value) {
-        result.hasArg1 = true;
-        result.arg1_ = value;
+        bitField0_ |= 0x00000002;
+        arg1_ = value;
+        onChanged();
         return this;
       }
       public Builder clearArg1() {
-        result.hasArg1 = false;
-        result.arg1_ = 0;
+        bitField0_ = (bitField0_ & ~0x00000002);
+        arg1_ = 0;
+        onChanged();
         return this;
       }
       
       // optional int32 arg2 = 3;
+      private int arg2_ ;
       public boolean hasArg2() {
-        return result.hasArg2();
+        return ((bitField0_ & 0x00000004) == 0x00000004);
       }
       public int getArg2() {
-        return result.getArg2();
+        return arg2_;
       }
       public Builder setArg2(int value) {
-        result.hasArg2 = true;
-        result.arg2_ = value;
+        bitField0_ |= 0x00000004;
+        arg2_ = value;
+        onChanged();
         return this;
       }
       public Builder clearArg2() {
-        result.hasArg2 = false;
-        result.arg2_ = 0;
+        bitField0_ = (bitField0_ & ~0x00000004);
+        arg2_ = 0;
+        onChanged();
         return this;
       }
       
@@ -366,7 +491,6 @@ public final class Example {
     
     static {
       defaultInstance = new Data(true);
-      com.orbekk.same.benchmark.Example.internalForceInit();
       defaultInstance.initFields();
     }
     
@@ -388,7 +512,7 @@ public final class Example {
     public static com.google.protobuf.Service newReflectiveService(
         final Interface impl) {
       return new Service() {
-        @Override
+        @java.lang.Override
         public  void methodA(
             com.google.protobuf.RpcController controller,
             com.orbekk.same.benchmark.Example.Data request,
@@ -637,7 +761,5 @@ public final class Example {
         }, assigner);
   }
   
-  public static void internalForceInit() {}
-  
   // @@protoc_insertion_point(outer_class_scope)
 }
diff --git a/same/src/main/java/com/orbekk/same/services.proto b/same/src/main/java/com/orbekk/same/services.proto
new file mode 100644
index 0000000..0ecba66
--- /dev/null
+++ b/same/src/main/java/com/orbekk/same/services.proto
@@ -0,0 +1,24 @@
+package com.orbekk.same;
+
+option java_generic_services = true;
+
+message Empty {
+}
+
+message Component {
+    required string id = 1;
+    required string data = 2;
+    required int64 revision = 3;
+}
+
+message MasterState {
+    optional string master_url = 1;
+    optional int32 master_id = 2;
+    optional string network_name = 3;
+}
+
+service Client {
+    rpc SetState (Component) returns (Empty);
+    rpc MasterTakeover (MasterState) returns (Empty);
+    rpc MasterDown (MasterState) returns (Empty);
+}