netty和protobuf的使用

一、什么是protobuf

　　Protobuf是google的开源项目，全称是Google Protocol Buffers，它是一个与语言无关、平台无关、可扩展的结构化数据序列化机制，类似XML，但它是更小、更快、更简单。只需定义一次数据的结构化方式，然后就可以使用特殊生成的源代码轻松地在各种数据流之间编写和读取结构化数据，并使用各种语言。

　　

二、protobuf使用

　　1.使用protobuf之前需要先下载并安装protobuf编译器。protobuf-js-3.6.1.zip，解压后要配置环境变量，如果使用protoc --version 命令能显示成功。

　　2.编写.proto文件我们需要通过在.proto文件中定义协议缓冲区消息类型来指定希望如何结构化序列化的信息。每个协议缓冲区消息都是一个很小的信息逻辑记录，包含一系列名称-值对。下面是.proto文件的一个基本示例

　　

syntax = "proto3"; //这一行指定使用的是proto3的语法，默认是proto2，整个文件的第一行必须是这个，不能是空行或者注释

package netty_protobuf3;  //包名，用来防止 不同文件中message名称相同导致冲突

option java_package = "netty_protobuf3";//生成的java文件的包名，如果没有设置java_package则用上面的package来作为包名
option java_outer_classname = "TestMessage";//定义生成的最外层的java类的

//定义的消息中每个字段都有一个唯一的数字编号，这些字段编号用于以消息二进制格式标识字段，在使用消息类型时不应更改。
//请注意，范围为1到15的字段号需要一个字节进行编码，包括字段号和字段类型
//16到2047之间的字段号占用两个字节。因此，您应该为频繁出现的消息元素保留数字1到15
//可以指定的最小字段号是1，最大字段号是2的29次方 - 1，即536870911。您也不能使用从19000到19999的数字
//一个.proto文件可以定义多个message，同时也可以定义嵌套message，这样有利于相关的message定义在一起。
/*protobuf支持的数据类型和对应的java类型

double ————> double
float ————> float
int32 ————> int(使用变长编码。编码负数效率低下——如果字段可能有负值，则使用sint32)
int64 ————> long(使用变长编码。编码负数效率低下——如果字段可能有负值，则使用sint64。)
uint32 ————> int(无符号,使用变长编码)
uint64 ————> long(无符号，使用变长编码)
sint32 ————> int(使用变长编码。这些方法比常规的int32更有效地编码负数。)
sint64 ————> long(使用变长编码。这些方法比常规的int64更有效地编码负数。)
fixed32 ————> int(无符号，总是四个字节。如果值通常大于2的28次方，则比uint32更有效)
fixed64 ————> long(无符号，总是8个字节。如果值通常大于2的56次方，则比uint64更有效)
sfixed32 ————> int(总是四个字节。)
sfixed64 ————> long(总是四个字节。)
bool ————> boolean
string ————> String(使用utf-8编码或者7-bit ASCLL编码的字符串)
bytes ————> ByteString(可以包含任意字节序列)
*/
/*和protobuf2相比protobuf3不能自己设置默认值，并且取消了required和optional两个关键字的使用，只有repeated关键字可以用
但是protobuf3有系统默认值：
对于strings，默认是一个空string
对于bytes，默认是一个空的bytes
对于bools，默认是false
对于数值类型，默认是0
对于枚举，默认是第一个定义的枚举值，必须为0
可重复域的默认值是空（通常情况下是对应语言中空列表）
*/
message Person {//普通消息
    string name = 1;
    int32 id = 2;
    string email = 3;

    enum PhoneType {//枚举消息
        MOBILE = 0;    //在protobuf3中，必须以0开头，这个值为枚举的默认值
        HOME = 1;
        WORK = 2;
    }

    message PhoneNumber {
        string number = 1;
        PhoneType type = 2;
    }

    repeated PhoneNumber phones = 4;//相当于是一个PhoneNumber的集合
}

message AddressBook {
    repeated Person people = 1;
    oneof test { //赋值的时候下面的属性只能选择一个，且属性不能用repeated来修饰
        string aname = 2;
        string aurl = 3;
    }

    map<string,Person> map_filed = 4;//定义map

}        

　　3、编译.proto文件，生成java代码

　　　　语法：protoc  --java_out=proto文件路径

　　

syntax = "proto3";
package netty_protobuf3;
option java_package = "netty_protobuf3";
option java_outer_classname = "Human";

message Teacher{
    int32 id = 1;
    string name = 2;
}

message Student{
    int32 id = 1;
    string name = 2;
}

message People{
    enum DataType{
        TEACHER = 0;
        STUDENT = 1;
    }

    DataType type = 1;

    oneof dataMsg {
        Student stu = 2;
        Teacher teacher = 3;
    }

}

syntax = "proto3";

package netty_protobuf3;

option java_package = "netty_protobuf3";
option java_outer_classname = "AddressBookProtos";

message Person {
    string name = 1;
    int32 id = 2;
    string email = 3;

    enum PhoneType {
        MOBILE = 0;
        HOME = 1;
        WORK = 2;
    }

    message PhoneNumber {
        string number = 1;
        PhoneType type = 2;
    }

    repeated PhoneNumber phones = 4;
}

message AddressBook {
    repeated Person people = 1;
}

package netty_protobuf3;

import io.netty.bootstrap.Bootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioSocketChannel;
import io.netty.handler.codec.protobuf.ProtobufDecoder;
import io.netty.handler.codec.protobuf.ProtobufEncoder;
import io.netty.handler.codec.protobuf.ProtobufVarint32FrameDecoder;
import io.netty.handler.codec.protobuf.ProtobufVarint32LengthFieldPrepender;
import netty_protobuf3.Human.People;
import netty_protobuf3.Human.Student;
import netty_protobuf3.Human.Teacher;

public class Client {

    public static void main(String[] args) {

        NioEventLoopGroup group = new NioEventLoopGroup();

        try{
            Bootstrap bootstrap = new Bootstrap();
            bootstrap.group(group).channel(NioSocketChannel.class)
            .handler(new ChannelInitializer<Channel>() {

                @Override
                protected void initChannel(Channel ch) throws Exception {
                    ch.pipeline().addLast(new ChannelInitializer<Channel>() {

                        @Override
                        protected void initChannel(Channel ch) throws Exception {
                            ch.pipeline()
                            .addLast(new ProtobufVarint32FrameDecoder())
//                            .addLast(new ProtobufDecoder(Person.getDefaultInstance()))
                            .addLast(new ProtobufDecoder(Human.People.getDefaultInstance()))
                            .addLast(new ProtobufVarint32LengthFieldPrepender())
                            .addLast(new ProtobufEncoder())
                            .addLast(new SimpleChannelInboundHandler<Human.People>() {

                                @Override
                                public void channelActive(ChannelHandlerContext ctx) throws Exception {
                                    /*Person person = Person.newBuilder()
                                            .setId(123).setName("小明").setEmail("[e-mail]")
                                            .addPhones(Person.PhoneNumber.newBuilder()
                                                    .setNumber("1234567890")
                                                    .setType(Person.PhoneType.HOME))
                                            .addPhones(Person.PhoneNumber.newBuilder()
                                                    .setNumber("2467833232")
                                                    .setType(Person.PhoneType.HOME)).build();
                                    ctx.writeAndFlush(person);*/

                                    Student student = Human.Student.newBuilder()
                                        .setId(1).setName("小明").build();
                                    People people1 = Human.People.newBuilder().setType(Human.People.DataType.STUDENT).setStu(student).build();

                                    Teacher teacher = Human.Teacher.newBuilder().setId(2).setName("xiaoming").build();
                                    People people2 = Human.People.newBuilder().setType(Human.People.DataType.TEACHER).setTeacher(teacher).build();

                                    ctx.write(people1);
                                    ctx.write(people2);
                                    ctx.flush();
                                }

                                @Override
                                protected void channelRead0(ChannelHandlerContext ctx, Human.People people) throws Exception {
                                    System.out.println(people);
                                }
                            });
                        }

                    });
                }

            });

            ChannelFuture future = bootstrap.connect("localhost", 9999).sync();
            future.channel().closeFuture().sync();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }finally{
            group.shutdownGracefully();
        }
    }

}

package netty_protobuf3;

import io.netty.bootstrap.ServerBootstrap;
import io.netty.channel.Channel;
import io.netty.channel.ChannelFuture;
import io.netty.channel.ChannelHandlerContext;
import io.netty.channel.ChannelInitializer;
import io.netty.channel.SimpleChannelInboundHandler;
import io.netty.channel.nio.NioEventLoopGroup;
import io.netty.channel.socket.nio.NioServerSocketChannel;
import io.netty.handler.codec.protobuf.ProtobufDecoder;
import io.netty.handler.codec.protobuf.ProtobufEncoder;
import io.netty.handler.codec.protobuf.ProtobufVarint32FrameDecoder;
import io.netty.handler.codec.protobuf.ProtobufVarint32LengthFieldPrepender;
import netty_protobuf3.AddressBookProtos.Person;
import netty_protobuf3.Human.People;

public class Server {

    public static void main(String[] args) {

        NioEventLoopGroup bossGroup = new NioEventLoopGroup();
        NioEventLoopGroup workGroup = new NioEventLoopGroup();

        try{
            ServerBootstrap serverBootstrap = new ServerBootstrap();
            serverBootstrap.group(bossGroup,workGroup).channel(NioServerSocketChannel.class)
            .childHandler(new ChannelInitializer<Channel>() {

                @Override
                protected void initChannel(Channel ch) throws Exception {
                    ch.pipeline()
                    .addLast(new ProtobufVarint32FrameDecoder())
//                    .addLast(new ProtobufDecoder(Person.getDefaultInstance()))
                    .addLast(new ProtobufDecoder(Human.People.getDefaultInstance()))
                    .addLast(new ProtobufVarint32LengthFieldPrepender())
                    .addLast(new ProtobufEncoder())
                    .addLast(new SimpleChannelInboundHandler<People>() {

                        @Override
                        protected void channelRead0(ChannelHandlerContext ctx, People people) throws Exception {
                            System.out.println(people);

                            /*Person person2 = Person.newBuilder()
                                    .setId(123).setName("kyle").setEmail("[e-mail]")
                                    .addPhones(Person.PhoneNumber.newBuilder()
                                            .setNumber("6868686868169")
                                            .setType(Person.PhoneType.HOME)).build();
                            ctx.writeAndFlush(person2);*/

                            System.out.println(people);
                            System.out.println(people.getStu().getName());
                        }
                    });
                }

            });

            ChannelFuture future = serverBootstrap.bind(9999).sync();
            future.channel().closeFuture().sync();
        } catch (InterruptedException e) {
            e.printStackTrace();
        }finally{
            bossGroup.shutdownGracefully();
            bossGroup.shutdownGracefully();
        }
    }

}

// Generated by the protocol buffer compiler.  DO NOT EDIT!
// source: addressbook.proto

package netty_protobuf3;

public final class AddressBookProtos {
  private AddressBookProtos() {}
  public static void registerAllExtensions(
      com.google.protobuf.ExtensionRegistryLite registry) {
  }

  public static void registerAllExtensions(
      com.google.protobuf.ExtensionRegistry registry) {
    registerAllExtensions(
        (com.google.protobuf.ExtensionRegistryLite) registry);
  }
  public interface PersonOrBuilder extends
      // @@protoc_insertion_point(interface_extends:netty_protobuf3.Person)
      com.google.protobuf.MessageOrBuilder {

    /**
     * <code>string name = 1;</code>
     */
    java.lang.String getName();
    /**
     * <code>string name = 1;</code>
     */
    com.google.protobuf.ByteString
        getNameBytes();

    /**
     * <code>int32 id = 2;</code>
     */
    int getId();

    /**
     * <code>string email = 3;</code>
     */
    java.lang.String getEmail();
    /**
     * <code>string email = 3;</code>
     */
    com.google.protobuf.ByteString
        getEmailBytes();

    /**
     * <code>repeated .netty_protobuf3.Person.PhoneNumber phones = 4;</code>
     */
    java.util.List<netty_protobuf3.AddressBookProtos.Person.PhoneNumber>
        getPhonesList();
    /**
     * <code>repeated .netty_protobuf3.Person.PhoneNumber phones = 4;</code>
     */
    netty_protobuf3.AddressBookProtos.Person.PhoneNumber getPhones(int index);
    /**
     * <code>repeated .netty_protobuf3.Person.PhoneNumber phones = 4;</code>
     */
    int getPhonesCount();
    /**
     * <code>repeated .netty_protobuf3.Person.PhoneNumber phones = 4;</code>
     */
    java.util.List<? extends netty_protobuf3.AddressBookProtos.Person.PhoneNumberOrBuilder>
        getPhonesOrBuilderList();
    /**
     * <code>repeated .netty_protobuf3.Person.PhoneNumber phones = 4;</code>
     */
    netty_protobuf3.AddressBookProtos.Person.PhoneNumberOrBuilder getPhonesOrBuilder(
        int index);
  }
  /**
   * Protobuf type {@code netty_protobuf3.Person}
   */
  public  static final class Person extends
      com.google.protobuf.GeneratedMessageV3 implements
      // @@protoc_insertion_point(message_implements:netty_protobuf3.Person)
      PersonOrBuilder {
  private static final long serialVersionUID = 0L;
    // Use Person.newBuilder() to construct.
    private Person(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
      super(builder);
    }
    private Person() {
      name_ = "";
      id_ = 0;
      email_ = "";
      phones_ = java.util.Collections.emptyList();
    }

    @java.lang.Override
    public final com.google.protobuf.UnknownFieldSet
    getUnknownFields() {
      return this.unknownFields;
    }
    private Person(
        com.google.protobuf.CodedInputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws com.google.protobuf.InvalidProtocolBufferException {
      this();
      if (extensionRegistry == null) {
        throw new java.lang.NullPointerException();
      }
      int mutable_bitField0_ = 0;
      com.google.protobuf.UnknownFieldSet.Builder unknownFields =
          com.google.protobuf.UnknownFieldSet.newBuilder();
      try {
        boolean done = false;
        while (!done) {
          int tag = input.readTag();
          switch (tag) {
            case 0:
              done = true;
              break;
            case 10: {
              java.lang.String s = input.readStringRequireUtf8();

              name_ = s;
              break;
            }
            case 16: {

              id_ = input.readInt32();
              break;
            }
            case 26: {
              java.lang.String s = input.readStringRequireUtf8();

              email_ = s;
              break;
            }
            case 34: {
              if (!((mutable_bitField0_ & 0x00000008) == 0x00000008)) {
                phones_ = new java.util.ArrayList<netty_protobuf3.AddressBookProtos.Person.PhoneNumber>();
                mutable_bitField0_ |= 0x00000008;
              }
              phones_.add(
                  input.readMessage(netty_protobuf3.AddressBookProtos.Person.PhoneNumber.parser(), extensionRegistry));
              break;
            }
            default: {
              if (!parseUnknownFieldProto3(
                  input, unknownFields, extensionRegistry, tag)) {
                done = true;
              }
              break;
            }
          }
        }
      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
        throw e.setUnfinishedMessage(this);
      } catch (java.io.IOException e) {
        throw new com.google.protobuf.InvalidProtocolBufferException(
            e).setUnfinishedMessage(this);
      } finally {
        if (((mutable_bitField0_ & 0x00000008) == 0x00000008)) {
          phones_ = java.util.Collections.unmodifiableList(phones_);
        }
        this.unknownFields = unknownFields.build();
        makeExtensionsImmutable();
      }
    }
    public static final com.google.protobuf.Descriptors.Descriptor
        getDescriptor() {
      return netty_protobuf3.AddressBookProtos.internal_static_netty_protobuf3_Person_descriptor;
    }

    @java.lang.Override
    protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
        internalGetFieldAccessorTable() {
      return netty_protobuf3.AddressBookProtos.internal_static_netty_protobuf3_Person_fieldAccessorTable
          .ensureFieldAccessorsInitialized(
              netty_protobuf3.AddressBookProtos.Person.class, netty_protobuf3.AddressBookProtos.Person.Builder.class);
    }

    /**
     * Protobuf enum {@code netty_protobuf3.Person.PhoneType}
     */
    public enum PhoneType
        implements com.google.protobuf.ProtocolMessageEnum {
      /**
       * <code>MOBILE = 0;</code>
       */
      MOBILE(0),
      /**
       * <code>HOME = 1;</code>
       */
      HOME(1),
      /**
       * <code>WORK = 2;</code>
       */
      WORK(2),
      UNRECOGNIZED(-1),
      ;

      /**
       * <code>MOBILE = 0;</code>
       */
      public static final int MOBILE_VALUE = 0;
      /**
       * <code>HOME = 1;</code>
       */
      public static final int HOME_VALUE = 1;
      /**
       * <code>WORK = 2;</code>
       */
      public static final int WORK_VALUE = 2;

      public final int getNumber() {
        if (this == UNRECOGNIZED) {
          throw new java.lang.IllegalArgumentException(
              "Can't get the number of an unknown enum value.");
        }
        return value;
      }

      /**
       * @deprecated Use {@link #forNumber(int)} instead.
       */
      @java.lang.Deprecated
      public static PhoneType valueOf(int value) {
        return forNumber(value);
      }

      public static PhoneType forNumber(int value) {
        switch (value) {
          case 0: return MOBILE;
          case 1: return HOME;
          case 2: return WORK;
          default: return null;
        }
      }

      public static com.google.protobuf.Internal.EnumLiteMap<PhoneType>
          internalGetValueMap() {
        return internalValueMap;
      }
      private static final com.google.protobuf.Internal.EnumLiteMap<
          PhoneType> internalValueMap =
            new com.google.protobuf.Internal.EnumLiteMap<PhoneType>() {
              public PhoneType findValueByNumber(int number) {
                return PhoneType.forNumber(number);
              }
            };

      public final com.google.protobuf.Descriptors.EnumValueDescriptor
          getValueDescriptor() {
        return getDescriptor().getValues().get(ordinal());
      }
      public final com.google.protobuf.Descriptors.EnumDescriptor
          getDescriptorForType() {
        return getDescriptor();
      }
      public static final com.google.protobuf.Descriptors.EnumDescriptor
          getDescriptor() {
        return netty_protobuf3.AddressBookProtos.Person.getDescriptor().getEnumTypes().get(0);
      }

      private static final PhoneType[] VALUES = values();

      public static PhoneType valueOf(
          com.google.protobuf.Descriptors.EnumValueDescriptor desc) {
        if (desc.getType() != getDescriptor()) {
          throw new java.lang.IllegalArgumentException(
            "EnumValueDescriptor is not for this type.");
        }
        if (desc.getIndex() == -1) {
          return UNRECOGNIZED;
        }
        return VALUES[desc.getIndex()];
      }

      private final int value;

      private PhoneType(int value) {
        this.value = value;
      }

      // @@protoc_insertion_point(enum_scope:netty_protobuf3.Person.PhoneType)
    }

    public interface PhoneNumberOrBuilder extends
        // @@protoc_insertion_point(interface_extends:netty_protobuf3.Person.PhoneNumber)
        com.google.protobuf.MessageOrBuilder {

      /**
       * <code>string number = 1;</code>
       */
      java.lang.String getNumber();
      /**
       * <code>string number = 1;</code>
       */
      com.google.protobuf.ByteString
          getNumberBytes();

      /**
       * <code>.netty_protobuf3.Person.PhoneType type = 2;</code>
       */
      int getTypeValue();
      /**
       * <code>.netty_protobuf3.Person.PhoneType type = 2;</code>
       */
      netty_protobuf3.AddressBookProtos.Person.PhoneType getType();
    }
    /**
     * Protobuf type {@code netty_protobuf3.Person.PhoneNumber}
     */
    public  static final class PhoneNumber extends
        com.google.protobuf.GeneratedMessageV3 implements
        // @@protoc_insertion_point(message_implements:netty_protobuf3.Person.PhoneNumber)
        PhoneNumberOrBuilder {
    private static final long serialVersionUID = 0L;
      // Use PhoneNumber.newBuilder() to construct.
      private PhoneNumber(com.google.protobuf.GeneratedMessageV3.Builder<?> builder) {
        super(builder);
      }
      private PhoneNumber() {
        number_ = "";
        type_ = 0;
      }

      @java.lang.Override
      public final com.google.protobuf.UnknownFieldSet
      getUnknownFields() {
        return this.unknownFields;
      }
      private PhoneNumber(
          com.google.protobuf.CodedInputStream input,
          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
          throws com.google.protobuf.InvalidProtocolBufferException {
        this();
        if (extensionRegistry == null) {
          throw new java.lang.NullPointerException();
        }
        int mutable_bitField0_ = 0;
        com.google.protobuf.UnknownFieldSet.Builder unknownFields =
            com.google.protobuf.UnknownFieldSet.newBuilder();
        try {
          boolean done = false;
          while (!done) {
            int tag = input.readTag();
            switch (tag) {
              case 0:
                done = true;
                break;
              case 10: {
                java.lang.String s = input.readStringRequireUtf8();

                number_ = s;
                break;
              }
              case 16: {
                int rawValue = input.readEnum();

                type_ = rawValue;
                break;
              }
              default: {
                if (!parseUnknownFieldProto3(
                    input, unknownFields, extensionRegistry, tag)) {
                  done = true;
                }
                break;
              }
            }
          }
        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
          throw e.setUnfinishedMessage(this);
        } catch (java.io.IOException e) {
          throw new com.google.protobuf.InvalidProtocolBufferException(
              e).setUnfinishedMessage(this);
        } finally {
          this.unknownFields = unknownFields.build();
          makeExtensionsImmutable();
        }
      }
      public static final com.google.protobuf.Descriptors.Descriptor
          getDescriptor() {
        return netty_protobuf3.AddressBookProtos.internal_static_netty_protobuf3_Person_PhoneNumber_descriptor;
      }

      @java.lang.Override
      protected com.google.protobuf.GeneratedMessageV3.FieldAccessorTable
          internalGetFieldAccessorTable() {
        return netty_protobuf3.AddressBookProtos.internal_static_netty_protobuf3_Person_PhoneNumber_fieldAccessorTable
            .ensureFieldAccessorsInitialized(
                netty_protobuf3.AddressBookProtos.Person.PhoneNumber.class, netty_protobuf3.AddressBookProtos.Person.PhoneNumber.Builder.class);
      }

      public static final int NUMBER_FIELD_NUMBER = 1;
      private volatile java.lang.Object number_;
      /**
       * <code>string number = 1;</code>
       */
      public java.lang.String getNumber() {
        java.lang.Object ref = number_;
        if (ref instanceof java.lang.String) {
          return (java.lang.String) ref;
        } else {
          com.google.protobuf.ByteString bs =
              (com.google.protobuf.ByteString) ref;
          java.lang.String s = bs.toStringUtf8();
          number_ = s;
          return s;
        }
      }
      /**
       * <code>string number = 1;</code>
       */
      public com.google.protobuf.ByteString
          getNumberBytes() {
        java.lang.Object ref = number_;
        if (ref instanceof java.lang.String) {
          com.google.protobuf.ByteString b =
              com.google.protobuf.ByteString.copyFromUtf8(
                  (java.lang.String) ref);
          number_ = b;
          return b;
        } else {
          return (com.google.protobuf.ByteString) ref;
        }
      }

      public static final int TYPE_FIELD_NUMBER = 2;
      private int type_;
      /**
       * <code>.netty_protobuf3.Person.PhoneType type = 2;</code>
       */
      public int getTypeValue() {
        return type_;
      }
      /**
       * <code>.netty_protobuf3.Person.PhoneType type = 2;</code>
       */
      public netty_protobuf3.AddressBookProtos.Person.PhoneType getType() {
        @SuppressWarnings("deprecation")
        netty_protobuf3.AddressBookProtos.Person.PhoneType result = netty_protobuf3.AddressBookProtos.Person.PhoneType.valueOf(type_);
        return result == null ? netty_protobuf3.AddressBookProtos.Person.PhoneType.UNRECOGNIZED : result;
      }

      private byte memoizedIsInitialized = -1;
      @java.lang.Override
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        internal_static_netty_protobuf3_Student_descriptor,
        new java.lang.String[] { "Id", "Name", });
    internal_static_netty_protobuf3_People_descriptor =
      getDescriptor().getMessageTypes().get(2);
    internal_static_netty_protobuf3_People_fieldAccessorTable = new
      com.google.protobuf.GeneratedMessageV3.FieldAccessorTable(
        internal_static_netty_protobuf3_People_descriptor,
        new java.lang.String[] { "Type", "Stu", "Teacher", "DataMsg", });
  }

  // @@protoc_insertion_point(outer_class_scope)
}