private string GetExtensionHash(ExtensionLoadingContext context, FileSystems.Dependencies.DependencyDescriptor dependencyDescriptor)
{
var hash = new Hash();
hash.AddStringInvariant(dependencyDescriptor.Name);
foreach (var virtualpathDependency in context.ProcessedExtensions[dependencyDescriptor.Name].VirtualPathDependencies)
{
hash.AddDateTime(GetVirtualPathModificationTimeUtc(context.VirtualPathModficationDates, virtualpathDependency));
}
foreach (var reference in dependencyDescriptor.References)
{
hash.AddStringInvariant(reference.Name);
hash.AddString(reference.LoaderName);
hash.AddDateTime(GetVirtualPathModificationTimeUtc(context.VirtualPathModficationDates, reference.VirtualPath));
}
return(hash.Value);
}
/// <summary>
/// 扩展删除。
/// </summary>
/// <param name="context">扩展装载上下文。</param>
/// <param name="dependency">依赖项描述符。</param>
public override void ExtensionRemoved(ExtensionLoadingContext context, FileSystems.Dependencies.DependencyDescriptor dependency)
{
if (!_assemblyProbingFolder.AssemblyExists(new AssemblyDescriptor(dependency.Name)))
{
return;
}
context.DeleteActions.Add(
() =>
{
Logger.Information("ExtensionRemoved: 删除在探测目录中的程序集 \"{0}\"", dependency.Name);
_assemblyProbingFolder.DeleteAssembly(dependency.Name);
});
//如果程序集已经被加载，需要重新启动AppDomain
if (!_hostEnvironment.IsAssemblyLoaded(dependency.Name))
{
return;
}
Logger.Information("ExtensionRemoved: 模块\"{0}\"被删除，它的程序集加载，迫使AppDomain重启", dependency.Name);
context.RestartAppDomain = true;
}
/// <summary>
/// 扩展删除。
/// </summary>
/// <param name="context">扩展装载上下文。</param>
/// <param name="dependency">依赖项描述符。</param>
public override void ExtensionRemoved(ExtensionLoadingContext context, FileSystems.Dependencies.DependencyDescriptor dependency)
{
DeleteAssembly(context, dependency.Name);
}
/// <summary>
/// 获取依赖文件的虚拟路径。
/// </summary>
/// <param name="dependency">依赖项描述符。</param>
/// <returns>虚拟路径集合。</returns>
public virtual IEnumerable <string> GetVirtualPathDependencies(FileSystems.Dependencies.DependencyDescriptor dependency)
{
return(Enumerable.Empty <string>());
}
/// <summary>
/// 获取编译引用信息。
/// </summary>
/// <param name="dependency"></param>
/// <returns>扩展编译引用集合。</returns>
public virtual IEnumerable <ExtensionCompilationReference> GetCompilationReferences(FileSystems.Dependencies.DependencyDescriptor dependency)
{
return(Enumerable.Empty <ExtensionCompilationReference>());
}
/// <summary>
/// 扩展删除。
/// </summary>
/// <param name="context">扩展装载上下文。</param>
/// <param name="dependency">依赖项描述符。</param>
public virtual void ExtensionRemoved(ExtensionLoadingContext context, FileSystems.Dependencies.DependencyDescriptor dependency)
{
}
/// <summary>
/// 获取依赖文件的虚拟路径。
/// </summary>
/// <param name="dependency">依赖项描述符。</param>
/// <returns>虚拟路径集合。</returns>
public override IEnumerable <string> GetVirtualPathDependencies(FileSystems.Dependencies.DependencyDescriptor dependency)
{
yield return(_assemblyProbingFolder.GetAssemblyVirtualPath(new AssemblyDescriptor(dependency.Name)));
}
/// <summary>
/// 获取编译引用信息。
/// </summary>
/// <param name="dependency"></param>
/// <returns>扩展编译引用集合。</returns>
public override IEnumerable <ExtensionCompilationReference> GetCompilationReferences(FileSystems.Dependencies.DependencyDescriptor dependency)
{
yield return(new ExtensionCompilationReference {
AssemblyName = dependency.Name
});
}