49 lines
2.0 KiB
C#
49 lines
2.0 KiB
C#
using System.Runtime.Loader;
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using Fantasy.Helper;
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namespace Fantasy
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{
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public static class AssemblyHelper
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{
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private const string HotfixDll = "Hotfix";
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private static AssemblyLoadContext? _assemblyLoadContext = null;
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public static void Initialize()
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{
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LoadEntityAssembly();
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LoadHotfixAssembly();
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}
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private static void LoadEntityAssembly()
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{
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// .NET 运行时采用延迟加载机制，如果代码中不使用程序集的类型，程序集不会被加载
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// 执行一下，触发运行时强制加载从而自动注册到框架中
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// 因为AssemblyHelper代码在Entity项目里，所以需要获取这个项目的Assembly
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// 然后调用EnsureLoaded方法强制加载一下
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typeof(AssemblyHelper).Assembly.EnsureLoaded();
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}
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public static System.Reflection.Assembly LoadHotfixAssembly()
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{
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if (_assemblyLoadContext != null)
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{
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_assemblyLoadContext.Unload();
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System.GC.Collect();
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}
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_assemblyLoadContext = new AssemblyLoadContext(HotfixDll, true);
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var dllBytes = File.ReadAllBytes(Path.Combine(AppContext.BaseDirectory, $"{HotfixDll}.dll"));
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var pdbBytes = File.ReadAllBytes(Path.Combine(AppContext.BaseDirectory, $"{HotfixDll}.pdb"));
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var assembly = _assemblyLoadContext.LoadFromStream(new MemoryStream(dllBytes), new MemoryStream(pdbBytes));
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// 强制触发 ModuleInitializer 执行
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// AssemblyLoadContext.LoadFromStream 只加载程序集到内存，不会自动触发 ModuleInitializer
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// 必须访问程序集中的类型才能触发初始化，这里通过反射调用生成的 AssemblyMarker
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// 注意：此方法仅用于热重载场景（JIT），Native AOT 不支持动态加载
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// 拿到Assembly就用EnsureLoaded()方法强制触发
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assembly.EnsureLoaded();
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return assembly;
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}
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}
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}
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