[GitHub] [incubator-ratis] szetszwo commented on a change in pull request #264: RATIS-1140. Add primary peer id to Raft proto and only create channels with peer for primary servers

[GitBox <gi...@apache.org>]

szetszwo commented on a change in pull request #264:
URL: https://github.com/apache/incubator-ratis/pull/264#discussion_r520225210



##########
File path: ratis-netty/src/main/java/org/apache/ratis/netty/server/NettyServerStreamRpc.java
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@@ -247,13 +248,13 @@ public void addRaftPeers(Collection<RaftPeer> newPeers) {
     proxies.addPeers(newPeers);
   }
 
-  private StreamInfo newStreamInfo(ByteBuf buf) {
+  private StreamInfo newStreamInfo(ByteBuf buf, boolean isPrimary) {
     try {
       final RaftClientRequest request = ClientProtoUtils.toRaftClientRequest(
           RaftClientRequestProto.parseFrom(buf.nioBuffer()));
       final StateMachine stateMachine = server.getStateMachine(request.getRaftGroupId());
       return new StreamInfo(request, stateMachine.data().stream(request),
-          proxies.getDataStreamOutput(request));
+          isPrimary ? proxies.getDataStreamOutput(request) : Collections.EMPTY_LIST);

Review comment:
       It is a good idea.   We may use
   ```
         final List<DataStreamOutputRpc> outs = server.getId().equals(request.getServerId())?  
             proxies.getDataStreamOutput(request): Collections.emptyList();
         return new StreamInfo(request, stateMachine.data().stream(request), outs);
   ```
   Note that request is RaftClientRequest.
   




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