support multi pb (#1361)

Author: gaoxinge

protocol/grpc/internal/README.md

@@ -11,3 +11,4 @@ This internal package is for test. So don't use internal in production.
 
 - [helloworld](./helloworld): test unary process
 - [routeguide](./routeguide): test stream process
+- [multiprotos](./multiprotos): use multi pb to generate multi pb.go

protocol/grpc/internal/helloworld/helloworld.pb.go

@@ -0,0 +1,19 @@
+# Licensed to the Apache Software Foundation (ASF) under one or more
+# contributor license agreements.  See the NOTICE file distributed with
+# this work for additional information regarding copyright ownership.
+# The ASF licenses this file to You under the Apache License, Version 2.0
+# (the "License"); you may not use this file except in compliance with
+# the License.  You may obtain a copy of the License at
+#
+#     http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+
+grpc-gen:
+	protoc -I ./ first.proto second.proto --go_out=plugins=grpc:.
+dubbo-gen:
+	protoc -I ./ first.proto second.proto --dubbo_out=plugins=grpc+dubbo:.

protocol/grpc/internal/multiprotos/Makefile

@@ -0,0 +1,32 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+syntax = "proto3";
+
+package multiprotos;
+
+message FirstRequest {
+    string message = 1;
+}
+
+message FirstResponse {
+    string message = 1;
+}
+
+service FristService {
+    rpc Service (FirstRequest) returns (FirstResponse) {}
+}