Google gRPC 编写的注意事项

一 POM 文件准备

pom 文件可从官方提供的 example 中的 pom 文件中提取。官方提供如下。

<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
  xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
  <modelVersion>4.0.0</modelVersion>
  <groupId>io.grpc</groupId>
  <artifactId>examples</artifactId>
  <packaging>jar</packaging>
  <!-- Feel free to delete the comment at the end of these lines. It is just
       for safely updating the version in our release process. -->
  <version>1.15.0</version><!-- CURRENT_GRPC_VERSION -->
  <name>examples</name>
  <url>http://maven.apache.org</url>
  <properties>
    <project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
    <grpc.version>1.15.0</grpc.version><!-- CURRENT_GRPC_VERSION -->
    <protobuf.version>3.5.1</protobuf.version>
    <protoc.version>3.5.1-1</protoc.version>
    <netty.tcnative.version>2.0.7.Final</netty.tcnative.version>
    <!-- required for jdk9 -->
    <maven.compiler.source>1.7</maven.compiler.source>
    <maven.compiler.target>1.7</maven.compiler.target>
  </properties>
  <depe