Question

我正在使用Marc Gravell的ProtoBuf-net库（r480，net20）来序列化/反序列化包含在服务器/客户端场景中使用的已知类型的词典<object, object>的自定义类（ C＃）这将取代我们使用BinaryFormatter的当前方法作为基础，我遵循这里提出的建议： protobuf-and-listobject-how-to-serialize-deserialize和此处protobuf-and-listobject-how-to-serialize-deserialize。

目前的方法有一些缺点，我希望更熟悉Protobuf-net的人可以给我一些提示如何改进它。

在OnSerialising（）调用中将词典<object, object>复制到词典<ProtoObject, ProtoObject>。
添加新类型的维护开销（每个需要ProtoInclude标记和ProtoObject.Create（对象obj）中的相应强制转换逻辑）
ProtoObject必须知道所有必需的类型。这会导致项目之间的循环引用问题，这只能通过更大的项目结构重构来解决。

理想情况下，我想使用RuntimeTypeModel方法，但我不知道如何让客户端知道类型（编译并将TypeModel dll传输到客户端？）。

同样在第一个主题中，Marc Gravell提到即将推出的“运行时可扩展模式”可以提供帮助，有人知道这些模式是否已实现以及它们如何工作？
我非常感谢我得到的任何回复，如果我能澄清更多内容，请告诉我无论如何，多亏Marc Gravell的神奇图书馆:)。

以下是代码：

[Serializable]
[ProtoContract]
public class Attributes : IXmlSerializable, IEnumerable, IEquatable<Attributes>, ICloneable
{
    // Non ProtoBuf-net relevant code was removed

    private Dictionary<object, object> attributes = new Dictionary<object, object>();

    [ProtoMember(1)]
    private Dictionary<ProtoObject, ProtoObject> protoDictionary;

    [OnSerializing]
    public void OnSerializing(StreamingContext context)
    {
        this.protoDictionary = new ProtoDictionary();

        foreach (var attribute in attributes)
        {
            this.protoDictionary.Add(ProtoObject.Create(attribute.Key), ProtoObject.Create(attribute.Value));
        }
    }

    [OnDeserialized]
    public void OnDeserialized(StreamingContext context)
    {
        if (this.protoDictionary != null)
        {
            this.attributes = new SerializableHashtable();

            foreach (var o in this.protoDictionary)
            {
                this.attributes.Add(o.Key.Value, o.Value.Value);
            }
        }
    }
}

[ProtoContract]
[ProtoInclude(1, typeof(ProtoObject<bool>))]
[ProtoInclude(2, typeof(ProtoObject<byte>))]
[ProtoInclude(3, typeof(ProtoObject<sbyte>))]
[ProtoInclude(4, typeof(ProtoObject<ushort>))]
[ProtoInclude(5, typeof(ProtoObject<short>))]
[ProtoInclude(6, typeof(ProtoObject<uint>))]
[ProtoInclude(7, typeof(ProtoObject<int>))]
[ProtoInclude(8, typeof(ProtoObject<ulong>))]
[ProtoInclude(9, typeof(ProtoObject<long>))]
[ProtoInclude(10, typeof(ProtoObject<float>))]
[ProtoInclude(11, typeof(ProtoObject<double>))]
[ProtoInclude(12, typeof(ProtoObject<decimal>))]
[ProtoInclude(13, typeof(ProtoObject<string>))]
[ProtoInclude(20, typeof(ProtoObject<Vector2F>))]
[ProtoInclude(21, typeof(ProtoObject<Vector3F>))]
[ProtoInclude(22, typeof(ProtoObject<Shape>))]
[ProtoInclude(23, typeof(ProtoObject<SharedUser>))]
[ProtoInclude(24, typeof(ProtoObject<SharedShip>))]
//[ProtoInclude(25, typeof(ProtoObject<IVehicleConfiguration>))] // Requires Steering dll -> cyclic reference
[ProtoInclude(26, typeof(ProtoObject<DroneState>))]
[ProtoInclude(27, typeof(ProtoObject<BuffCode>))]
[ProtoInclude(28, typeof(ProtoObject<ItemAttribute>))]
[ProtoInclude(40, typeof(ProtoObject<List<int>>))]
public abstract class ProtoObject
{
    protected ProtoObject()
    {
    }

    // Replaces public static ProtoObject<T> Create<T>(T value)
    // in order to use the actual type of the object
    public static ProtoObject Create(object obj)
    {
        if (obj is bool)
        {
            return new ProtoObject<bool>((bool)obj);
        }

        if (obj is byte)
        {
            return new ProtoObject<byte>((byte)obj);
        }

        // etc. for all required types

        return null;
    }

    public static ProtoObject Create(bool obj)
    {
        TypeModel.Add(obj.GetType(), true);

        return new ProtoObject<bool>(obj);
    }

    public static ProtoObject Create(byte obj)
    {
        return new ProtoObject<byte>(obj);
    }

    // ... public static ProtoObject Create(type obj) -> for all required types

    public object Value
    {
        get { return ValueImpl; }
        set { ValueImpl = value; }
    }

    protected abstract object ValueImpl { get; set; }   
}

[ProtoContract]
public sealed class ProtoObject<T> : ProtoObject
{
    public ProtoObject()
    {
    }

    public ProtoObject(T value)
    {
        Value = value;
    }

    [ProtoMember(1)]
    public new T Value { get; set; }

    protected override object ValueImpl
    {
        get { return Value; }
        set { Value = (T)value; }
    }

    public override string ToString()
    {
        return Value.ToString();
    }
}

Answer 1

序列化Dictionary<object,object>根本不是受支持的用例......就个人而言，我认为您应该更多地考虑使用特定于使用情况的DTO模型，就像使用{{1 }，XmlSerializer或DataContractSerializer。 protobuf-net最终仍然是一个合同序列化器，DTO模型是理想的用例。它通常适用于非DTO模型，但这不是一个公开的保证，它将适用于每个可能设计的模型。

Protobuf-net：序列化包含Dictionary <object，object =“”> </object，>的自定义类

1 个答案: