OnCodeLoadedAttribute

Description

Marks a static method as a callback to be invoked after code has been loaded during Editor startup or after a code reload.

Methods marked with this attribute are called after assemblies have been loaded and initialized. This happens:

• After initial code load (Editor and Player).
• After a code reload (Editor only).

Use this callback to:

• Perform type discovery using TypeCache or reflection.
• Initialize caches that depend on loaded types.
• Set up references to types from other assemblies.

This is a method attribute that can only be applied to static methods with no parameters and return type void.

Additional resources: OnCodeUnloadingAttribute, OnCodeInitializingAttribute, RuntimeInitializeOnLoadMethodAttribute, InitializeOnLoadAttribute

using Unity.Scripting.LifecycleManagement;
using UnityEngine;
using System;
using System.Collections.Generic;

public static partial class PluginRegistry
{
    private static Dictionary<string, Type> s_PluginTypes;

    [OnCodeLoaded]
    static void DiscoverPlugins()
    {
        s_PluginTypes = new Dictionary<string, Type>();
        foreach (var assembly in AppDomain.CurrentDomain.GetAssemblies())
        {
            foreach (var type in assembly.GetTypes())
            {
                var attr = type.GetCustomAttributes(typeof(GamePluginAttribute), false);
                if (attr.Length > 0)
                    s_PluginTypes[type.Name] = type;
            }
        }
    }

    public static Type GetPlugin(string name) => s_PluginTypes.TryGetValue(name, out var t) ? t : null;
}

public class GamePluginAttribute : Attribute { }

Inherited Members