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Google Protobuf 使用 Java 版

时间：2015-06-02 00:07:04      阅读：129      评论：0      收藏：0      [点我收藏+]

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一 . Protobuf 的入门

　　Protobuf 是一个灵活,高效,结构化的数据序列化框架, 相比于 XML 等传统的序列化工具,它更小,更快,更灵活,更简单. Protobuf 支持数据结构化一次可以到处使用.甚至跨语言使用.同通过代码生成工具可以自动生成不同语言版本的源代码,甚至可以在使用不同版本的数据结构中进行数据传递,实现数据结构的向前兼容.　　

　　Google 的 protobuf 在业界非常流行,很多商业项目选择 protobuf 作为编码解码框架,这里我们一起回顾一下 Protobuf 的优点.

  1. 在 Google 内长期使用,产品成熟度高;
  2. 跨语言,支持多种语言,包括 c++,Java, 和 Python;
  3. 编码后的消息更小,更加有利于存储和传输;
  4. 编码的性能非常高;
  5. 支持不同协议版本的向前兼容;
  6. 支持定义可选和必选字段;

如图:

 技术分享

 

 二. Protobuf 的使用(mac 环境下).

1. 环境搭建

1.1 下载 protobuf 　　

http://pan.baidu.com/s/1dDyEUjR

1.2. 安装 

tar -zxf  protobuf-2.5.0.tar.gz
cd protobuf-2.5.0
./configure --prefix=/Users/mjorcen/dev/tools/protobuf  
make & make install

注 : /Users/mjorcen/dev/tools/protobuf 为自己设定的编译安装目录

1.3. 配置环境变量

sudo vi .bash_profile
export PROTOBUF=/Users/mjorcen/dev/tools/protobuf
export PATH=$PROTOBUF/bin:$PATH

1.4. 测试

protoc --version

 

2 . Protobuf 入门

2.1 定义数据结构;

package netty ;
option java_package = “object.server.impl”;
option java_outer_classname = “SubScriptReqProto”;

message SubScriptReq{
    required int32 subReqID = 1 ;
    required string userName = 2 ;
    required string productName = 3 ;
    required string address = 4 ;
}

 

package netty ;
option java_package = “object.server.impl”;
option java_outer_classname = “SubScriptRespProto”;

message SubScriptResp{
　　required int32 subReqID = 1 ;
　　required int32 respCode = 2 ;
　　required string desc = 3 ;
}

2.2 通过 Protobuf 命令生成代码

MjorcendeMacBook-Air:tmp mjorcen$ /Users/mjorcen/dev/tools/protobuf/bin/protoc --java_out=./src ./netty/SubScriptReq.proto 
MjorcendeMacBook-Air:tmp mjorcen$ /Users/mjorcen/dev/tools/protobuf/bin/protoc --java_out=./src ./netty/SubScriptResp.proto

 

2.3 把生成的 Java 文件复制放入项目中.

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

package object.server.impl;

public final class SubScriptReqProto {
  private SubScriptReqProto() {}
  public static void registerAllExtensions(
      com.google.protobuf.ExtensionRegistry registry) {
  }
  public interface SubScriptReqOrBuilder
      extends com.google.protobuf.MessageOrBuilder {

    // required int32 subReqID = 1;
    /**
     * <code>required int32 subReqID = 1;</code>
     */
    boolean hasSubReqID();
    /**
     * <code>required int32 subReqID = 1;</code>
     */
    int getSubReqID();

    // required string userName = 2;
    /**
     * <code>required string userName = 2;</code>
     */
    boolean hasUserName();
    /**
     * <code>required string userName = 2;</code>
     */
    java.lang.String getUserName();
    /**
     * <code>required string userName = 2;</code>
     */
    com.google.protobuf.ByteString
        getUserNameBytes();

    // required string productName = 3;
    /**
     * <code>required string productName = 3;</code>
     */
    boolean hasProductName();
    /**
     * <code>required string productName = 3;</code>
     */
    java.lang.String getProductName();
    /**
     * <code>required string productName = 3;</code>
     */
    com.google.protobuf.ByteString
        getProductNameBytes();

    // required string address = 4;
    /**
     * <code>required string address = 4;</code>
     */
    boolean hasAddress();
    /**
     * <code>required string address = 4;</code>
     */
    java.lang.String getAddress();
    /**
     * <code>required string address = 4;</code>
     */
    com.google.protobuf.ByteString
        getAddressBytes();
  }
  /**
   * Protobuf type {@code netty.SubScriptReq}
   */
  public static final class SubScriptReq extends
      com.google.protobuf.GeneratedMessage
      implements SubScriptReqOrBuilder {
    // Use SubScriptReq.newBuilder() to construct.
    private SubScriptReq(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
      super(builder);
      this.unknownFields = builder.getUnknownFields();
    }
    private SubScriptReq(boolean noInit) { this.unknownFields = com.google.protobuf.UnknownFieldSet.getDefaultInstance(); }

    private static final SubScriptReq defaultInstance;
    public static SubScriptReq getDefaultInstance() {
      return defaultInstance;
    }

    public SubScriptReq getDefaultInstanceForType() {
      return defaultInstance;
    }

    private final com.google.protobuf.UnknownFieldSet unknownFields;
    @java.lang.Override
    public final com.google.protobuf.UnknownFieldSet
        getUnknownFields() {
      return this.unknownFields;
    }
    private SubScriptReq(
        com.google.protobuf.CodedInputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws com.google.protobuf.InvalidProtocolBufferException {
      initFields();
      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;
            default: {
              if (!parseUnknownField(input, unknownFields,
                                     extensionRegistry, tag)) {
                done = true;
              }
              break;
            }
            case 8: {
              bitField0_ |= 0x00000001;
              subReqID_ = input.readInt32();
              break;
            }
            case 18: {
              bitField0_ |= 0x00000002;
              userName_ = input.readBytes();
              break;
            }
            case 26: {
              bitField0_ |= 0x00000004;
              productName_ = input.readBytes();
              break;
            }
            case 34: {
              bitField0_ |= 0x00000008;
              address_ = input.readBytes();
              break;
            }
          }
        }
      } catch (com.google.protobuf.InvalidProtocolBufferException e) {
        throw e.setUnfinishedMessage(this);
      } catch (java.io.IOException e) {
        throw new com.google.protobuf.InvalidProtocolBufferException(
            e.getMessage()).setUnfinishedMessage(this);
      } finally {
        this.unknownFields = unknownFields.build();
        makeExtensionsImmutable();
      }
    }
    public static final com.google.protobuf.Descriptors.Descriptor
        getDescriptor() {
      return object.server.impl.SubScriptReqProto.internal_static_netty_SubScriptReq_descriptor;
    }

    protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
        internalGetFieldAccessorTable() {
      return object.server.impl.SubScriptReqProto.internal_static_netty_SubScriptReq_fieldAccessorTable
          .ensureFieldAccessorsInitialized(
              object.server.impl.SubScriptReqProto.SubScriptReq.class, object.server.impl.SubScriptReqProto.SubScriptReq.Builder.class);
    }

    public static com.google.protobuf.Parser<SubScriptReq> PARSER =
        new com.google.protobuf.AbstractParser<SubScriptReq>() {
      public SubScriptReq parsePartialFrom(
          com.google.protobuf.CodedInputStream input,
          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
          throws com.google.protobuf.InvalidProtocolBufferException {
        return new SubScriptReq(input, extensionRegistry);
      }
    };

    @java.lang.Override
    public com.google.protobuf.Parser<SubScriptReq> getParserForType() {
      return PARSER;
    }

    private int bitField0_;
    // required int32 subReqID = 1;
    public static final int SUBREQID_FIELD_NUMBER = 1;
    private int subReqID_;
    /**
     * <code>required int32 subReqID = 1;</code>
     */
    public boolean hasSubReqID() {
      return ((bitField0_ & 0x00000001) == 0x00000001);
    }
    /**
     * <code>required int32 subReqID = 1;</code>
     */
    public int getSubReqID() {
      return subReqID_;
    }

    // required string userName = 2;
    public static final int USERNAME_FIELD_NUMBER = 2;
    private java.lang.Object userName_;
    /**
     * <code>required string userName = 2;</code>
     */
    public boolean hasUserName() {
      return ((bitField0_ & 0x00000002) == 0x00000002);
    }
    /**
     * <code>required string userName = 2;</code>
     */
    public java.lang.String getUserName() {
      java.lang.Object ref = userName_;
      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();
        if (bs.isValidUtf8()) {
          userName_ = s;
        }
        return s;
      }
    }
    /**
     * <code>required string userName = 2;</code>
     */
    public com.google.protobuf.ByteString
        getUserNameBytes() {
      java.lang.Object ref = userName_;
      if (ref instanceof java.lang.String) {
        com.google.protobuf.ByteString b = 
            com.google.protobuf.ByteString.copyFromUtf8(
                (java.lang.String) ref);
        userName_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }

    // required string productName = 3;
    public static final int PRODUCTNAME_FIELD_NUMBER = 3;
    private java.lang.Object productName_;
    /**
     * <code>required string productName = 3;</code>
     */
    public boolean hasProductName() {
      return ((bitField0_ & 0x00000004) == 0x00000004);
    }
    /**
     * <code>required string productName = 3;</code>
     */
    public java.lang.String getProductName() {
      java.lang.Object ref = productName_;
      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();
        if (bs.isValidUtf8()) {
          productName_ = s;
        }
        return s;
      }
    }
    /**
     * <code>required string productName = 3;</code>
     */
    public com.google.protobuf.ByteString
        getProductNameBytes() {
      java.lang.Object ref = productName_;
      if (ref instanceof java.lang.String) {
        com.google.protobuf.ByteString b = 
            com.google.protobuf.ByteString.copyFromUtf8(
                (java.lang.String) ref);
        productName_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }

    // required string address = 4;
    public static final int ADDRESS_FIELD_NUMBER = 4;
    private java.lang.Object address_;
    /**
     * <code>required string address = 4;</code>
     */
    public boolean hasAddress() {
      return ((bitField0_ & 0x00000008) == 0x00000008);
    }
    /**
     * <code>required string address = 4;</code>
     */
    public java.lang.String getAddress() {
      java.lang.Object ref = address_;
      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();
        if (bs.isValidUtf8()) {
          address_ = s;
        }
        return s;
      }
    }
    /**
     * <code>required string address = 4;</code>
     */
    public com.google.protobuf.ByteString
        getAddressBytes() {
      java.lang.Object ref = address_;
      if (ref instanceof java.lang.String) {
        com.google.protobuf.ByteString b = 
            com.google.protobuf.ByteString.copyFromUtf8(
                (java.lang.String) ref);
        address_ = b;
        return b;
      } else {
        return (com.google.protobuf.ByteString) ref;
      }
    }

    private void initFields() {
      subReqID_ = 0;
      userName_ = "";
      productName_ = "";
      address_ = "";
    }
    private byte memoizedIsInitialized = -1;
    public final boolean isInitialized() {
      byte isInitialized = memoizedIsInitialized;
      if (isInitialized != -1) return isInitialized == 1;

      if (!hasSubReqID()) {
        memoizedIsInitialized = 0;
        return false;
      }
      if (!hasUserName()) {
        memoizedIsInitialized = 0;
        return false;
      }
      if (!hasProductName()) {
        memoizedIsInitialized = 0;
        return false;
      }
      if (!hasAddress()) {
        memoizedIsInitialized = 0;
        return false;
      }
      memoizedIsInitialized = 1;
      return true;
    }

    public void writeTo(com.google.protobuf.CodedOutputStream output)
                        throws java.io.IOException {
      getSerializedSize();
      if (((bitField0_ & 0x00000001) == 0x00000001)) {
        output.writeInt32(1, subReqID_);
      }
      if (((bitField0_ & 0x00000002) == 0x00000002)) {
        output.writeBytes(2, getUserNameBytes());
      }
      if (((bitField0_ & 0x00000004) == 0x00000004)) {
        output.writeBytes(3, getProductNameBytes());
      }
      if (((bitField0_ & 0x00000008) == 0x00000008)) {
        output.writeBytes(4, getAddressBytes());
      }
      getUnknownFields().writeTo(output);
    }

    private int memoizedSerializedSize = -1;
    public int getSerializedSize() {
      int size = memoizedSerializedSize;
      if (size != -1) return size;

      size = 0;
      if (((bitField0_ & 0x00000001) == 0x00000001)) {
        size += com.google.protobuf.CodedOutputStream
          .computeInt32Size(1, subReqID_);
      }
      if (((bitField0_ & 0x00000002) == 0x00000002)) {
        size += com.google.protobuf.CodedOutputStream
          .computeBytesSize(2, getUserNameBytes());
      }
      if (((bitField0_ & 0x00000004) == 0x00000004)) {
        size += com.google.protobuf.CodedOutputStream
          .computeBytesSize(3, getProductNameBytes());
      }
      if (((bitField0_ & 0x00000008) == 0x00000008)) {
        size += com.google.protobuf.CodedOutputStream
          .computeBytesSize(4, getAddressBytes());
      }
      size += getUnknownFields().getSerializedSize();
      memoizedSerializedSize = size;
      return size;
    }

    private static final long serialVersionUID = 0L;
    @java.lang.Override
    protected java.lang.Object writeReplace()
        throws java.io.ObjectStreamException {
      return super.writeReplace();
    }

    public static object.server.impl.SubScriptReqProto.SubScriptReq parseFrom(
        com.google.protobuf.ByteString data)
        throws com.google.protobuf.InvalidProtocolBufferException {
      return PARSER.parseFrom(data);
    }
    public static object.server.impl.SubScriptReqProto.SubScriptReq parseFrom(
        com.google.protobuf.ByteString data,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws com.google.protobuf.InvalidProtocolBufferException {
      return PARSER.parseFrom(data, extensionRegistry);
    }
    public static object.server.impl.SubScriptReqProto.SubScriptReq parseFrom(byte[] data)
        throws com.google.protobuf.InvalidProtocolBufferException {
      return PARSER.parseFrom(data);
    }
    public static object.server.impl.SubScriptReqProto.SubScriptReq parseFrom(
        byte[] data,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws com.google.protobuf.InvalidProtocolBufferException {
      return PARSER.parseFrom(data, extensionRegistry);
    }
    public static object.server.impl.SubScriptReqProto.SubScriptReq parseFrom(java.io.InputStream input)
        throws java.io.IOException {
      return PARSER.parseFrom(input);
    }
    public static object.server.impl.SubScriptReqProto.SubScriptReq parseFrom(
        java.io.InputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws java.io.IOException {
      return PARSER.parseFrom(input, extensionRegistry);
    }
    public static object.server.impl.SubScriptReqProto.SubScriptReq parseDelimitedFrom(java.io.InputStream input)
        throws java.io.IOException {
      return PARSER.parseDelimitedFrom(input);
    }
    public static object.server.impl.SubScriptReqProto.SubScriptReq parseDelimitedFrom(
        java.io.InputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws java.io.IOException {
      return PARSER.parseDelimitedFrom(input, extensionRegistry);
    }
    public static object.server.impl.SubScriptReqProto.SubScriptReq parseFrom(
        com.google.protobuf.CodedInputStream input)
        throws java.io.IOException {
      return PARSER.parseFrom(input);
    }
    public static object.server.impl.SubScriptReqProto.SubScriptReq parseFrom(
        com.google.protobuf.CodedInputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws java.io.IOException {
      return PARSER.parseFrom(input, extensionRegistry);
    }

    public static Builder newBuilder() { return Builder.create(); }
    public Builder newBuilderForType() { return newBuilder(); }
    public static Builder newBuilder(object.server.impl.SubScriptReqProto.SubScriptReq prototype) {
      return newBuilder().mergeFrom(prototype);
    }
    public Builder toBuilder() { return newBuilder(this); }

    @java.lang.Override
    protected Builder newBuilderForType(
        com.google.protobuf.GeneratedMessage.BuilderParent parent) {
      Builder builder = new Builder(parent);
      return builder;
    }
    /**
     * Protobuf type {@code netty.SubScriptReq}
     */
    public static final class Builder extends
        com.google.protobuf.GeneratedMessage.Builder<Builder>
       implements object.server.impl.SubScriptReqProto.SubScriptReqOrBuilder {
      public static final com.google.protobuf.Descriptors.Descriptor
          getDescriptor() {
        return object.server.impl.SubScriptReqProto.internal_static_netty_SubScriptReq_descriptor;
      }

      protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
          internalGetFieldAccessorTable() {
        return object.server.impl.SubScriptReqProto.internal_static_netty_SubScriptReq_fieldAccessorTable
            .ensureFieldAccessorsInitialized(
                object.server.impl.SubScriptReqProto.SubScriptReq.class, object.server.impl.SubScriptReqProto.SubScriptReq.Builder.class);
      }

      // Construct using object.server.impl.SubScriptReqProto.SubScriptReq.newBuilder()
      private Builder() {
        maybeForceBuilderInitialization();
      }

      private Builder(
          com.google.protobuf.GeneratedMessage.BuilderParent parent) {
        super(parent);
        maybeForceBuilderInitialization();
      }
      private void maybeForceBuilderInitialization() {
        if (com.google.protobuf.GeneratedMessage.alwaysUseFieldBuilders) {
        }
      }
      private static Builder create() {
        return new Builder();
      }

      public Builder clear() {
        super.clear();
        subReqID_ = 0;
        bitField0_ = (bitField0_ & ~0x00000001);
        userName_ = "";
        bitField0_ = (bitField0_ & ~0x00000002);
        productName_ = "";
        bitField0_ = (bitField0_ & ~0x00000004);
        address_ = "";
        bitField0_ = (bitField0_ & ~0x00000008);
        return this;
      }

      public Builder clone() {
        return create().mergeFrom(buildPartial());
      }

      public com.google.protobuf.Descriptors.Descriptor
          getDescriptorForType() {
        return object.server.impl.SubScriptReqProto.internal_static_netty_SubScriptReq_descriptor;
      }

      public object.server.impl.SubScriptReqProto.SubScriptReq getDefaultInstanceForType() {
        return object.server.impl.SubScriptReqProto.SubScriptReq.getDefaultInstance();
      }

      public object.server.impl.SubScriptReqProto.SubScriptReq build() {
        object.server.impl.SubScriptReqProto.SubScriptReq result = buildPartial();
        if (!result.isInitialized()) {
          throw newUninitializedMessageException(result);
        }
        return result;
      }

      public object.server.impl.SubScriptReqProto.SubScriptReq buildPartial() {
        object.server.impl.SubScriptReqProto.SubScriptReq result = new object.server.impl.SubScriptReqProto.SubScriptReq(this);
        int from_bitField0_ = bitField0_;
        int to_bitField0_ = 0;
        if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
          to_bitField0_ |= 0x00000001;
        }
        result.subReqID_ = subReqID_;
        if (((from_bitField0_ & 0x00000002) == 0x00000002)) {
          to_bitField0_ |= 0x00000002;
        }
        result.userName_ = userName_;
        if (((from_bitField0_ & 0x00000004) == 0x00000004)) {
          to_bitField0_ |= 0x00000004;
        }
        result.productName_ = productName_;
        if (((from_bitField0_ & 0x00000008) == 0x00000008)) {
          to_bitField0_ |= 0x00000008;
        }
        result.address_ = address_;
        result.bitField0_ = to_bitField0_;
        onBuilt();
        return result;
      }

      public Builder mergeFrom(com.google.protobuf.Message other) {
        if (other instanceof object.server.impl.SubScriptReqProto.SubScriptReq) {
          return mergeFrom((object.server.impl.SubScriptReqProto.SubScriptReq)other);
        } else {
          super.mergeFrom(other);
          return this;
        }
      }

      public Builder mergeFrom(object.server.impl.SubScriptReqProto.SubScriptReq other) {
        if (other == object.server.impl.SubScriptReqProto.SubScriptReq.getDefaultInstance()) return this;
        if (other.hasSubReqID()) {
          setSubReqID(other.getSubReqID());
        }
        if (other.hasUserName()) {
          bitField0_ |= 0x00000002;
          userName_ = other.userName_;
          onChanged();
        }
        if (other.hasProductName()) {
          bitField0_ |= 0x00000004;
          productName_ = other.productName_;
          onChanged();
        }
        if (other.hasAddress()) {
          bitField0_ |= 0x00000008;
          address_ = other.address_;
          onChanged();
        }
        this.mergeUnknownFields(other.getUnknownFields());
        return this;
      }

      public final boolean isInitialized() {
        if (!hasSubReqID()) {
          
          return false;
        }
        if (!hasUserName()) {
          
          return false;
        }
        if (!hasProductName()) {
          
          return false;
        }
        if (!hasAddress()) {
          
          return false;
        }
        return true;
      }

      public Builder mergeFrom(
          com.google.protobuf.CodedInputStream input,
          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
          throws java.io.IOException {
        object.server.impl.SubScriptReqProto.SubScriptReq parsedMessage = null;
        try {
          parsedMessage = PARSER.parsePartialFrom(input, extensionRegistry);
        } catch (com.google.protobuf.InvalidProtocolBufferException e) {
          parsedMessage = (object.server.impl.SubScriptReqProto.SubScriptReq) e.getUnfinishedMessage();
          throw e;
        } finally {
          if (parsedMessage != null) {
            mergeFrom(parsedMessage);
          }
        }
        return this;
      }
      private int bitField0_;

      // required int32 subReqID = 1;
      private int subReqID_ ;
      /**
       * <code>required int32 subReqID = 1;</code>
       */
      public boolean hasSubReqID() {
        return ((bitField0_ & 0x00000001) == 0x00000001);
      }
      /**
       * <code>required int32 subReqID = 1;</code>
       */
      public int getSubReqID() {
        return subReqID_;
      }
      /**
       * <code>required int32 subReqID = 1;</code>
       */
      public Builder setSubReqID(int value) {
        bitField0_ |= 0x00000001;
        subReqID_ = value;
        onChanged();
        return this;
      }
      /**
       * <code>required int32 subReqID = 1;</code>
       */
      public Builder clearSubReqID() {
        bitField0_ = (bitField0_ & ~0x00000001);
        subReqID_ = 0;
        onChanged();
        return this;
      }

      // required string userName = 2;
      private java.lang.Object userName_ = "";
      /**
       * <code>required string userName = 2;</code>
       */
      public boolean hasUserName() {
        return ((bitField0_ & 0x00000002) == 0x00000002);
      }
      /**
       * <code>required string userName = 2;</code>
       */
      public java.lang.String getUserName() {
        java.lang.Object ref = userName_;
        if (!(ref instanceof java.lang.String)) {
          java.lang.String s = ((com.google.protobuf.ByteString) ref)
              .toStringUtf8();
          userName_ = s;
          return s;
        } else {
          return (java.lang.String) ref;
        }
      }
      /**
       * <code>required string userName = 2;</code>
       */
      public com.google.protobuf.ByteString
          getUserNameBytes() {
        java.lang.Object ref = userName_;
        if (ref instanceof String) {
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       * <code>required string userName = 2;</code>
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        if (value == null) {
    throw new NullPointerException();
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  bitField0_ |= 0x00000002;
        userName_ = value;
        onChanged();
        return this;
      }
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       * <code>required string userName = 2;</code>
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       * <code>required string productName = 3;</code>
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       * <code>required string productName = 3;</code>
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        if (value == null) {
    throw new NullPointerException();
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  bitField0_ |= 0x00000004;
        productName_ = value;
        onChanged();
        return this;
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      /**
       * <code>required string productName = 3;</code>
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        if (value == null) {
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  bitField0_ |= 0x00000004;
        productName_ = value;
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       * <code>required string address = 4;</code>
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        java.lang.Object ref = address_;
        if (ref instanceof String) {
          com.google.protobuf.ByteString b = 
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          address_ = b;
          return b;
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       * <code>required string address = 4;</code>
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      public Builder setAddress(
          java.lang.String value) {
        if (value == null) {
    throw new NullPointerException();
  }
  bitField0_ |= 0x00000008;
        address_ = value;
        onChanged();
        return this;
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       * <code>required string address = 4;</code>
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      public Builder clearAddress() {
        bitField0_ = (bitField0_ & ~0x00000008);
        address_ = getDefaultInstance().getAddress();
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        return this;
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       * <code>required string address = 4;</code>
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                if (value == null) {
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  bitField0_ |= 0x00000008;
        address_ = value;
        onChanged();
        return this;
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      // @@protoc_insertion_point(builder_scope:netty.SubScriptReq)
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    static {
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// Generated by the protocol buffer compiler.  DO NOT EDIT!
// source: netty/SubScriptResp.proto

package object.server.impl;

public final class SubScriptRespProto {
  private SubScriptRespProto() {}
  public static void registerAllExtensions(
      com.google.protobuf.ExtensionRegistry registry) {
  }
  public interface SubScriptRespOrBuilder
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    /**
     * <code>required int32 subReqID = 1;</code>
     */
    boolean hasSubReqID();
    /**
     * <code>required int32 subReqID = 1;</code>
     */
    int getSubReqID();

    // required int32 respCode = 2;
    /**
     * <code>required int32 respCode = 2;</code>
     */
    boolean hasRespCode();
    /**
     * <code>required int32 respCode = 2;</code>
     */
    int getRespCode();

    // required string desc = 3;
    /**
     * <code>required string desc = 3;</code>
     */
    boolean hasDesc();
    /**
     * <code>required string desc = 3;</code>
     */
    java.lang.String getDesc();
    /**
     * <code>required string desc = 3;</code>
     */
    com.google.protobuf.ByteString
        getDescBytes();
  }
  /**
   * Protobuf type {@code netty.SubScriptResp}
   */
  public static final class SubScriptResp extends
      com.google.protobuf.GeneratedMessage
      implements SubScriptRespOrBuilder {
    // Use SubScriptResp.newBuilder() to construct.
    private SubScriptResp(com.google.protobuf.GeneratedMessage.Builder<?> builder) {
      super(builder);
      this.unknownFields = builder.getUnknownFields();
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    private SubScriptResp(boolean noInit) { this.unknownFields = com.google.protobuf.UnknownFieldSet.getDefaultInstance(); }

    private static final SubScriptResp defaultInstance;
    public static SubScriptResp getDefaultInstance() {
      return defaultInstance;
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    public SubScriptResp getDefaultInstanceForType() {
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      initFields();
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              if (!parseUnknownField(input, unknownFields,
                                     extensionRegistry, tag)) {
                done = true;
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              break;
            }
            case 8: {
              bitField0_ |= 0x00000001;
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              break;
            }
            case 16: {
              bitField0_ |= 0x00000002;
              respCode_ = input.readInt32();
              break;
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            case 26: {
              bitField0_ |= 0x00000004;
              desc_ = input.readBytes();
              break;
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          }
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        throw e.setUnfinishedMessage(this);
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        throw new com.google.protobuf.InvalidProtocolBufferException(
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        this.unknownFields = unknownFields.build();
        makeExtensionsImmutable();
      }
    }
    public static final com.google.protobuf.Descriptors.Descriptor
        getDescriptor() {
      return object.server.impl.SubScriptRespProto.internal_static_netty_SubScriptResp_descriptor;
    }

    protected com.google.protobuf.GeneratedMessage.FieldAccessorTable
        internalGetFieldAccessorTable() {
      return object.server.impl.SubScriptRespProto.internal_static_netty_SubScriptResp_fieldAccessorTable
          .ensureFieldAccessorsInitialized(
              object.server.impl.SubScriptRespProto.SubScriptResp.class, object.server.impl.SubScriptRespProto.SubScriptResp.Builder.class);
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    public static com.google.protobuf.Parser<SubScriptResp> PARSER =
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          com.google.protobuf.CodedInputStream input,
          com.google.protobuf.ExtensionRegistryLite extensionRegistry)
          throws com.google.protobuf.InvalidProtocolBufferException {
        return new SubScriptResp(input, extensionRegistry);
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    @java.lang.Override
    public com.google.protobuf.Parser<SubScriptResp> getParserForType() {
      return PARSER;
    }

    private int bitField0_;
    // required int32 subReqID = 1;
    public static final int SUBREQID_FIELD_NUMBER = 1;
    private int subReqID_;
    /**
     * <code>required int32 subReqID = 1;</code>
     */
    public boolean hasSubReqID() {
      return ((bitField0_ & 0x00000001) == 0x00000001);
    }
    /**
     * <code>required int32 subReqID = 1;</code>
     */
    public int getSubReqID() {
      return subReqID_;
    }

    // required int32 respCode = 2;
    public static final int RESPCODE_FIELD_NUMBER = 2;
    private int respCode_;
    /**
     * <code>required int32 respCode = 2;</code>
     */
    public boolean hasRespCode() {
      return ((bitField0_ & 0x00000002) == 0x00000002);
    }
    /**
     * <code>required int32 respCode = 2;</code>
     */
    public int getRespCode() {
      return respCode_;
    }

    // required string desc = 3;
    public static final int DESC_FIELD_NUMBER = 3;
    private java.lang.Object desc_;
    /**
     * <code>required string desc = 3;</code>
     */
    public boolean hasDesc() {
      return ((bitField0_ & 0x00000004) == 0x00000004);
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    /**
     * <code>required string desc = 3;</code>
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    public java.lang.String getDesc() {
      java.lang.Object ref = desc_;
      if (ref instanceof java.lang.String) {
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        com.google.protobuf.ByteString bs = 
            (com.google.protobuf.ByteString) ref;
        java.lang.String s = bs.toStringUtf8();
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          desc_ = s;
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        return s;
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    /**
     * <code>required string desc = 3;</code>
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    public com.google.protobuf.ByteString
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      java.lang.Object ref = desc_;
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        com.google.protobuf.ByteString b = 
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                (java.lang.String) ref);
        desc_ = b;
        return b;
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        return (com.google.protobuf.ByteString) ref;
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    private void initFields() {
      subReqID_ = 0;
      respCode_ = 0;
      desc_ = "";
    }
    private byte memoizedIsInitialized = -1;
    public final boolean isInitialized() {
      byte isInitialized = memoizedIsInitialized;
      if (isInitialized != -1) return isInitialized == 1;

      if (!hasSubReqID()) {
        memoizedIsInitialized = 0;
        return false;
      }
      if (!hasRespCode()) {
        memoizedIsInitialized = 0;
        return false;
      }
      if (!hasDesc()) {
        memoizedIsInitialized = 0;
        return false;
      }
      memoizedIsInitialized = 1;
      return true;
    }

    public void writeTo(com.google.protobuf.CodedOutputStream output)
                        throws java.io.IOException {
      getSerializedSize();
      if (((bitField0_ & 0x00000001) == 0x00000001)) {
        output.writeInt32(1, subReqID_);
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      if (((bitField0_ & 0x00000002) == 0x00000002)) {
        output.writeInt32(2, respCode_);
      }
      if (((bitField0_ & 0x00000004) == 0x00000004)) {
        output.writeBytes(3, getDescBytes());
      }
      getUnknownFields().writeTo(output);
    }

    private int memoizedSerializedSize = -1;
    public int getSerializedSize() {
      int size = memoizedSerializedSize;
      if (size != -1) return size;

      size = 0;
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        size += com.google.protobuf.CodedOutputStream
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      if (((bitField0_ & 0x00000002) == 0x00000002)) {
        size += com.google.protobuf.CodedOutputStream
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        size += com.google.protobuf.CodedOutputStream
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      size += getUnknownFields().getSerializedSize();
      memoizedSerializedSize = size;
      return size;
    }

    private static final long serialVersionUID = 0L;
    @java.lang.Override
    protected java.lang.Object writeReplace()
        throws java.io.ObjectStreamException {
      return super.writeReplace();
    }

    public static object.server.impl.SubScriptRespProto.SubScriptResp parseFrom(
        com.google.protobuf.ByteString data)
        throws com.google.protobuf.InvalidProtocolBufferException {
      return PARSER.parseFrom(data);
    }
    public static object.server.impl.SubScriptRespProto.SubScriptResp parseFrom(
        com.google.protobuf.ByteString data,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws com.google.protobuf.InvalidProtocolBufferException {
      return PARSER.parseFrom(data, extensionRegistry);
    }
    public static object.server.impl.SubScriptRespProto.SubScriptResp parseFrom(byte[] data)
        throws com.google.protobuf.InvalidProtocolBufferException {
      return PARSER.parseFrom(data);
    }
    public static object.server.impl.SubScriptRespProto.SubScriptResp parseFrom(
        byte[] data,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws com.google.protobuf.InvalidProtocolBufferException {
      return PARSER.parseFrom(data, extensionRegistry);
    }
    public static object.server.impl.SubScriptRespProto.SubScriptResp parseFrom(java.io.InputStream input)
        throws java.io.IOException {
      return PARSER.parseFrom(input);
    }
    public static object.server.impl.SubScriptRespProto.SubScriptResp parseFrom(
        java.io.InputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws java.io.IOException {
      return PARSER.parseFrom(input, extensionRegistry);
    }
    public static object.server.impl.SubScriptRespProto.SubScriptResp parseDelimitedFrom(java.io.InputStream input)
        throws java.io.IOException {
      return PARSER.parseDelimitedFrom(input);
    }
    public static object.server.impl.SubScriptRespProto.SubScriptResp parseDelimitedFrom(
        java.io.InputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws java.io.IOException {
      return PARSER.parseDelimitedFrom(input, extensionRegistry);
    }
    public static object.server.impl.SubScriptRespProto.SubScriptResp parseFrom(
        com.google.protobuf.CodedInputStream input)
        throws java.io.IOException {
      return PARSER.parseFrom(input);
    }
    public static object.server.impl.SubScriptRespProto.SubScriptResp parseFrom(
        com.google.protobuf.CodedInputStream input,
        com.google.protobuf.ExtensionRegistryLite extensionRegistry)
        throws java.io.IOException {
      return PARSER.parseFrom(input, extensionRegistry);
    }

    public static Builder newBuilder() { return Builder.create(); }
    public Builder newBuilderForType() { return newBuilder(); }
    public static Builder newBuilder(object.server.impl.SubScriptRespProto.SubScriptResp prototype) {
      return newBuilder().mergeFrom(prototype);
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    protected Builder newBuilderForType(
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      Builder builder = new Builder(parent);
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    /**
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     */
    public static final class Builder extends
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        bitField0_ = (bitField0_ & ~0x00000001);
        respCode_ = 0;
        bitField0_ = (bitField0_ & ~0x00000002);
        desc_ = "";
        bitField0_ = (bitField0_ & ~0x00000004);
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      public Builder clone() {
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      public com.google.protobuf.Descriptors.Descriptor
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        return object.server.impl.SubScriptRespProto.SubScriptResp.getDefaultInstance();
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      public object.server.impl.SubScriptRespProto.SubScriptResp build() {
        object.server.impl.SubScriptRespProto.SubScriptResp result = buildPartial();
        if (!result.isInitialized()) {
          throw newUninitializedMessageException(result);
        }
        return result;
      }

      public object.server.impl.SubScriptRespProto.SubScriptResp buildPartial() {
        object.server.impl.SubScriptRespProto.SubScriptResp result = new object.server.impl.SubScriptRespProto.SubScriptResp(this);
        int from_bitField0_ = bitField0_;
        int to_bitField0_ = 0;
        if (((from_bitField0_ & 0x00000001) == 0x00000001)) {
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        result.subReqID_ = subReqID_;
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        onBuilt();
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      public Builder mergeFrom(com.google.protobuf.Message other) {
        if (other instanceof object.server.impl.SubScriptRespProto.SubScriptResp) {
          return mergeFrom((object.server.impl.SubScriptRespProto.SubScriptResp)other);
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      public Builder mergeFrom(object.server.impl.SubScriptRespProto.SubScriptResp other) {
        if (other == object.server.impl.SubScriptRespProto.SubScriptResp.getDefaultInstance()) return this;
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        if (other.hasRespCode()) {
          setRespCode(other.getRespCode());
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        if (other.hasDesc()) {
          bitField0_ |= 0x00000004;
          desc_ = other.desc_;
          onChanged();
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      public final boolean isInitialized() {
        if (!hasSubReqID()) {
          
          return false;
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        if (!hasRespCode()) {
          
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          return false;
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          throw e;
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          if (parsedMessage != null) {
            mergeFrom(parsedMessage);
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      private int bitField0_;

      // required int32 subReqID = 1;
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       * <code>required int32 subReqID = 1;</code>
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        return ((bitField0_ & 0x00000001) == 0x00000001);
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       * <code>required int32 subReqID = 1;</code>
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        bitField0_ = (bitField0_ & ~0x00000001);
        subReqID_ = 0;
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      public Builder setRespCode(int value) {
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        respCode_ = value;
        onChanged();
        return this;
      }
      /**
       * <code>required int32 respCode = 2;</code>
       */
      public Builder clearRespCode() {
        bitField0_ = (bitField0_ & ~0x00000002);
        respCode_ = 0;
        onChanged();
        return this;
      }

      // required string desc = 3;
      private java.lang.Object desc_ = "";
      /**
       * <code>required string desc = 3;</code>
       */
      public boolean hasDesc() {
        return ((bitField0_ & 0x00000004) == 0x00000004);
      }
      /**
       * <code>required string desc = 3;</code>
       */
      public java.lang.String getDesc() {
        java.lang.Object ref = desc_;
        if (!(ref instanceof java.lang.String)) {
          java.lang.String s = ((com.google.protobuf.ByteString) ref)
              .toStringUtf8();
          desc_ = s;
          return s;
        } else {
          return (java.lang.String) ref;
        }
      }
      /**
       * <code>required string desc = 3;</code>
       */
      public com.google.protobuf.ByteString
          getDescBytes() {
        java.lang.Object ref = desc_;
        if (ref instanceof String) {
          com.google.protobuf.ByteString b = 
              com.google.protobuf.ByteString.copyFromUtf8(
                  (java.lang.String) ref);
          desc_ = b;
          return b;
        } else {
          return (com.google.protobuf.ByteString) ref;
        }
      }
      /**
       * <code>required string desc = 3;</code>
       */
      public Builder setDesc(
          java.lang.String value) {
        if (value == null) {
    throw new NullPointerException();
  }
  bitField0_ |= 0x00000004;
        desc_ = value;
        onChanged();
        return this;
      }
      /**
       * <code>required string desc = 3;</code>
       */
      public Builder clearDesc() {
        bitField0_ = (bitField0_ & ~0x00000004);
        desc_ = getDefaultInstance().getDesc();
        onChanged();
        return this;
      }
      /**
       * <code>required string desc = 3;</code>
       */
      public Builder setDescBytes(
          com.google.protobuf.ByteString value) {
        if (value == null) {
    throw new NullPointerException();
  }
  bitField0_ |= 0x00000004;
        desc_ = value;
        onChanged();
        return this;
      }

      // @@protoc_insertion_point(builder_scope:netty.SubScriptResp)
    }

    static {
      defaultInstance = new SubScriptResp(true);
      defaultInstance.initFields();
    }

    // @@protoc_insertion_point(class_scope:netty.SubScriptResp)
  }

  private static com.google.protobuf.Descriptors.Descriptor
    internal_static_netty_SubScriptResp_descriptor;
  private static
    com.google.protobuf.GeneratedMessage.FieldAccessorTable
      internal_static_netty_SubScriptResp_fieldAccessorTable;

  public static com.google.protobuf.Descriptors.FileDescriptor
      getDescriptor() {
    return descriptor;
  }
  private static com.google.protobuf.Descriptors.FileDescriptor
      descriptor;
  static {
    java.lang.String[] descriptorData = {
      "\n\031netty/SubScriptResp.proto\022\005netty\"A\n\rSu" +
      "bScriptResp\022\020\n\010subReqID\030\001 \002(\005\022\020\n\010respCod" +
      "e\030\002 \002(\005\022\014\n\004desc\030\003 \002(\tB(\n\022object.server.i" +
      "mplB\022SubScriptRespProto"
    };
    com.google.protobuf.Descriptors.FileDescriptor.InternalDescriptorAssigner assigner =
      new com.google.protobuf.Descriptors.FileDescriptor.InternalDescriptorAssigner() {
        public com.google.protobuf.ExtensionRegistry assignDescriptors(
            com.google.protobuf.Descriptors.FileDescriptor root) {
          descriptor = root;
          internal_static_netty_SubScriptResp_descriptor =
            getDescriptor().getMessageTypes().get(0);
          internal_static_netty_SubScriptResp_fieldAccessorTable = new
            com.google.protobuf.GeneratedMessage.FieldAccessorTable(
              internal_static_netty_SubScriptResp_descriptor,
              new java.lang.String[] { "SubReqID", "RespCode", "Desc", });
          return null;
        }
      };
    com.google.protobuf.Descriptors.FileDescriptor
      .internalBuildGeneratedFileFrom(descriptorData,
        new com.google.protobuf.Descriptors.FileDescriptor[] {
        }, assigner);
  }

  // @@protoc_insertion_point(outer_class_scope)
}

 

2.3 测试

package protobuf.client.impl;

import object.server.impl.SubScriptReqProto;
import object.server.impl.SubScriptReqProto.SubScriptReq;

import com.google.protobuf.InvalidProtocolBufferException;

public class TestReqProto {
    public static void main(String[] args)
            throws InvalidProtocolBufferException {
        SubScriptReqProto.SubScriptReq.Builder builder = SubScriptReqProto.SubScriptReq
                .newBuilder();

        builder.setSubReqID(1);
        builder.setUserName("leifeng");
        builder.setProductName("netty book !!!");
        builder.setAddress("add1");
        SubScriptReq req = builder.build();
        System.out.println(req);
        SubScriptReqProto.SubScriptReq requiem = decode(encode(req));
        System.out.println(requiem);
        System.out.println(req.equals(requiem));

    }

    private static SubScriptReq decode(byte[] encode)
            throws InvalidProtocolBufferException {
        // TODO Auto-generated method stub
        return SubScriptReqProto.SubScriptReq.parseFrom(encode);
    }

    private static byte[] encode(SubScriptReq builder) {

        return builder.toByteArray();
    }
}

 







Google Protobuf 使用 Java 版

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原文地址：http://www.cnblogs.com/mjorcen/p/4545109.html
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