我正在尝试将 protobuf-net 与 C# 位置记录类型一起使用,并且遇到了此异常:
10:18:48.048 [EROR] #010 (Microsoft.AspNetCore.Server.Kestrel) Connection id ""0HM4NDHMUB3C6"", Request id ""0HM4NDHMUB3C6:00000003"": An unhandled exception was thrown by the application.
Grpc.Core.RpcException: Status(StatusCode="Internal", Detail="Error starting gRPC call. ProtoException: No parameterless constructor found for Bidirectional.Demo.Common.Contracts.Server.GetServerProcessI
nfo.GetServerProcessInfoResponse", DebugException="ProtoBuf.ProtoException: No parameterless constructor found for Bidirectional.Demo.Common.Contracts.Server.GetServerProcessInfo.GetServerProcessInfoResp
onse
at ProtoBuf.Internal.ThrowHelper.ThrowProtoException(String message, Exception inner) in /_/src/protobuf-net.Core/Internal/ThrowHelper.cs:line 70
at ProtoBuf.Meta.TypeModel.ThrowCannotCreateInstance(Type type, Exception inner) in /_/src/protobuf-net.Core/Meta/TypeModel.cs:line 1666
at proto_12(State& , GetServerProcessInfoResponse )
at ProtoBuf.Internal.Serializers.SimpleCompiledSerializer`1.ProtoBuf.Serializers.ISerializer<T>.Read(State& state, T value)
at ProtoBuf.ProtoReader.State.ReadAsRoot[T](T value, ISerializer`1 serializer)
at ProtoBuf.ProtoReader.State.DeserializeRoot[T](T value, ISerializer`1 serializer)
at ProtoBuf.Meta.TypeModel.Deserialize[T](ReadOnlySequence`1 source, T value, Object userState)
at ProtoBuf.Grpc.Configuration.ProtoBufMarshallerFactory.ContextualDeserialize[T](DeserializationContext context)
GetServerProcessInfoResponse 如下所示:
[ProtoContract]
public record GetServerProcessInfoResponse(
[property: ProtoMember(1)] TimeSpan TotalProcessorTime,
[property: ProtoMember(2)] TimeSpan UserProcessorTime,
[property: ProtoMember(3)] TimeSpan PrivilegedProcessorTime,
[property: ProtoMember(4)] string CurrentMemoryUsage,
[property: ProtoMember(5)] string PeakMemoryUsage,
[property: ProtoMember(6)] int ActiveThreads
);
如果我将 GetServerProcessInfoResponse 更改为具有可获取和可设置属性的常规 C# 类,则代码可以正常工作。然而,我希望记录也能起作用,因为它们避免了很多可为空的警告。例如,System.Text.Json 支持反序列化记录,这必须克服相同的限制。
我在文档、问题或 StackOverflow 上找不到任何内容,所以也许我不擅长搜索,或者答案可能还没有出现。 :-)
protobuf-net 存储库似乎也没有任何尝试序列化/反序列化 C# 记录的单元测试,它只包含“RecordTypeTests”,它似乎正在检查记录是否可以克隆?