我想在Autofac中为每个匹配的生命周期范围注册创建一个实例,但偶尔需要从全局容器(没有匹配的生命周期范围)请求实例.在没有匹配的生命周期范围的情况下,我想提供一个顶级实例而不是抛出异常.
这可能吗?
解决方法
我认为你最好通过引入新的生命周期选项来扩展Autofac.我使用了Autofac源并对其进行了一些修改:
public static class RegistrationBuilderExtensions { public static IRegistrationBuilder<TLimit,TActivatorData,TRegistrationStyle> InstancePerMatchingOrRootLifetimeScope<TLimit,TRegistrationStyle>(this IRegistrationBuilder<TLimit,TRegistrationStyle> builder,params object[] lifetimeScopeTag) { if (lifetimeScopeTag == null) throw new ArgumentNullException("lifetimeScopeTag"); builder.RegistrationData.Sharing = InstanceSharing.Shared; builder.RegistrationData.Lifetime = new MatchingScopeOrRootLifetime(lifetimeScopeTag); return builder; } } public class MatchingScopeOrRootLifetime: IComponentLifetime { readonly object[] _tagsToMatch; public MatchingScopeOrRootLifetime(params object[] lifetimeScopeTagsToMatch) { if (lifetimeScopeTagsToMatch == null) throw new ArgumentNullException("lifetimeScopeTagsToMatch"); _tagsToMatch = lifetimeScopeTagsToMatch; } public ISharingLifetimeScope FindScope(ISharingLifetimeScope mostnestedVisibleScope) { if (mostnestedVisibleScope == null) throw new ArgumentNullException("mostnestedVisibleScope"); var next = mostnestedVisibleScope; while (next != null) { if (_tagsToMatch.Contains(next.Tag)) return next; next = next.ParentLifetimeScope; } return mostnestedVisibleScope.RootLifetimeScope; } }
builder.RegisterType<A>.InstancePerMatchingOrRootLifetimeScope("TAG");
我自己没试过,但它应该有用.
原文地址:https://www.jb51.cc/csharp/91432.html
版权声明:本文内容由互联网用户自发贡献,该文观点与技术仅代表作者本人。本站仅提供信息存储空间服务,不拥有所有权,不承担相关法律责任。如发现本站有涉嫌侵权/违法违规的内容, 请发送邮件至 dio@foxmail.com 举报,一经查实,本站将立刻删除。