adjust proto

weed/pb/mq.proto

@@ -34,6 +34,8 @@ service SeaweedMessaging {
     // data plane
     rpc Publish (stream PublishRequest) returns (stream PublishResponse) {
     }
+    rpc Subscribe (stream SubscribeRequest) returns (stream SubscribeResponse) {
+    }
 }
 
 //////////////////////////////////////////////////
@@ -144,13 +146,14 @@ message CheckTopicPartitionsStatusResponse {
 }
 
 //////////////////////////////////////////////////
+message DataMessage {
+    bytes key = 1;
+    bytes value = 2;
+}
 message PublishRequest {
     message InitMessage {
-        Segment segment = 1;
-    }
-    message DataMessage {
-        bytes key = 1;
-        bytes value = 2;
+        Topic topic = 1;
+        Partition partition = 2;
     }
     oneof message {
         InitMessage init = 1;
@@ -163,3 +166,24 @@ message PublishResponse {
     string error = 2;
     bool is_closed = 3;
 }
+message SubscribeRequest {
+    message InitMessage {
+        Topic topic = 1;
+        Partition partition = 2;
+    }
+    oneof message {
+        InitMessage init = 1;
+        DataMessage data = 2;
+    }
+    int64 sequence = 3;
+}
+message SubscribeResponse {
+    message CtrlMessage {
+        string error = 1;
+        string redirect_to_broker = 2;
+    }
+    oneof message {
+        CtrlMessage ctrl = 1;
+        DataMessage data = 2;
+    }
+}