相关疑难解决方法(0)

我最近使用gRPC与proto3,我已经注意到,required并optional在新的语法已被删除.

有人会解释为什么在proto3中删除了必需/可选项？这样的约束似乎对于使定义具有鲁棒性是必要的.

语法proto2:

message SearchRequest {
  required string query = 1;
  optional int32 page_number = 2;
  optional int32 result_per_page = 3;
}

语法proto3:

syntax = "proto3";
message SearchRequest {
  string query = 1;
  int32 page_number = 2;
  int32 result_per_page = 3;
}

我通常在C#中编写代码的所有部分,在编写序列化的协议时,我使用FastSerializer快速高效地序列化/反序列化类.它也非常容易使用,并且非常直接地进行"版本控制",即处理不同版本的序列化.我通常使用的东西,看起来像这样:

public override void DeserializeOwnedData(SerializationReader reader, object context)
{
    base.DeserializeOwnedData(reader, context);
    byte serializeVersion = reader.ReadByte(); // used to keep what version we are using

    this.CustomerNumber = reader.ReadString();
    this.HomeAddress = reader.ReadString();
    this.ZipCode = reader.ReadString();
    this.HomeCity = reader.ReadString();
    if (serializeVersion > 0)
        this.HomeAddressObj = reader.ReadUInt32();
    if (serializeVersion > 1)
        this.County = reader.ReadString();
    if (serializeVersion > 2)
        this.Muni = reader.ReadString();
    if (serializeVersion > 3)
        this._AvailableCustomers = reader.ReadList<uint>();
}

和

public override void SerializeOwnedData(SerializationWriter writer, object context)
{            
    base.SerializeOwnedData(writer, context);
    byte serializeVersion = 4; …