ModernUO/Projects/Server/Serialization/ISerializable.cs
Kamron Batman 312e3873f1
fix(core): Fixes encoded int. Adds dirty checking opt-out (#619)
### Additions
- Automatically opts-out `Item/Mobile/Guild/Accounts` from dirty checking with a new property `UseDirtyChecking`
- Codegen now enables `UseDirtyChecking` via getter. This requires that the property is `virtual` for derived types.

### Fixes
- Fixes `EncodedInt` being broken
- Fixes issues with new custom serializable types that are not derived from Item/Mobile/etc.
- Removes double dirty checking.

### Example of a brand new serializable type that isn't an Item/Mobile/etc.
User created code:
```cs
using System;

namespace Server.Items
{
    [Serializable(0)]
    public partial class NewTestEntityObject : ISerializable
    {
        [EncodedInt]
        [SerializableField(0)]
        private int _someProperty;

        public NewTestEntityObject()
        {
            SetTypeRef(GetType());
            // Add to serial tracking like World.Item
            /*
            Serial = World.NewEntity;
            World.AddEntity(this);
            */
        }

        [AfterDeserialization]
        private void AfterDeserialization()
        {
            Console.WriteLine("This ran!");
        }

        public int TypeRef { get; }
        public Serial Serial { get; }
        public void Delete()
        {
        }

        public bool Deleted { get; set; }
        public void SetTypeRef(Type type)
        {
            // Type tracking for persistence goes here
            /*
            TypeRef = World.NewEntityTypes.IndexOf(type);
            if (TypeRef == -1)
            {
                World.NewEntityTypes.Add(type);
                TypeRef = World.NewEntityTypes.Count - 1;
            }
            */
        }
    }
}
```

Generated code:
```cs
namespace Server.Items
{
    public partial class NewTestEntityObject
    {
#pragma warning disable 0414
        private const int _version = 0;
#pragma warning restore 0414

        public int SomeProperty
        {
            get => _someProperty;
            set
            {
                if (value != _someProperty)
                {
                    _someProperty = value;
                    ((ISerializable)this).MarkDirty();
                }
            }
        }

        long ISerializable.SavePosition { get; set; } = -1;
        BufferWriter ISerializable.SaveBuffer { get; set; }
        bool ISerializable.UseDirtyChecking => true;

        public NewTestEntityObject(Serial serial)
        {
            Serial = serial;
            SetTypeRef(typeof(NewTestEntityObject));
        }

        public void Serialize(IGenericWriter writer)
        {

            writer.WriteEncodedInt(_version);

            writer.WriteEncodedInt(SomeProperty);
        }

        public void Deserialize(IGenericReader reader)
        {
            var version = reader.ReadEncodedInt();

            SomeProperty = reader.ReadEncodedInt();

            Timer.DelayCall(AfterDeserialization);
        }
    }
}
```
2021-05-26 19:25:05 -07:00

80 lines
2.8 KiB
C#

/*************************************************************************
* ModernUO *
* Copyright 2019-2020 - ModernUO Development Team *
* Email: hi@modernuo.com *
* File: ISerializable.cs *
* *
* This program is free software: you can redistribute it and/or modify *
* it under the terms of the GNU General Public License as published by *
* the Free Software Foundation, either version 3 of the License, or *
* (at your option) any later version. *
* *
* You should have received a copy of the GNU General Public License *
* along with this program. If not, see <http://www.gnu.org/licenses/>. *
*************************************************************************/
using System;
using System.IO;
namespace Server
{
public interface ISerializable
{
// Make sure all properties that will be serialized are calling `MarkDirty()` when they get modified.
// This should be done manually or via code gen through SerializedField attribute.
// This attribute should be virtual for any base serializalbe type (Item, Mobile, etc) that can be opt-in per type.
bool UseDirtyChecking { get; }
long SavePosition { get; protected set; }
BufferWriter SaveBuffer { get; protected internal set; }
int TypeRef { get; }
Serial Serial { get; }
void Deserialize(IGenericReader reader);
void Serialize(IGenericWriter writer);
void Delete();
bool Deleted { get; }
void MarkDirty()
{
SavePosition = -1;
}
void SetTypeRef(Type type);
public void InitializeSaveBuffer(byte[] buffer)
{
SaveBuffer = new BufferWriter(buffer, true);
if (UseDirtyChecking)
{
SavePosition = SaveBuffer.Position;
}
else
{
SavePosition = -1;
}
}
public void Serialize()
{
SaveBuffer ??= new BufferWriter(true);
// Clean, don't bother serializing
if (SavePosition > -1)
{
SaveBuffer.Seek(SavePosition, SeekOrigin.Begin);
return;
}
SaveBuffer.Seek(0, SeekOrigin.Begin);
Serialize(SaveBuffer);
if (UseDirtyChecking)
{
SavePosition = SaveBuffer.Position;
}
else
{
SavePosition = -1;
}
}
}
}