[英]How to use the same singleton instance from main appdomain in childs appdomain
I have a reference to a singleton (CacheLayer ) from a class (InnerModuleInfoLoader) loaded inside a child domain. 我有一个从子域中加载的类(InnerModuleInfoLoader)对单例(CacheLayer)的引用。 The problem is that this reference is not the same instance as for the rest of the code living in main domain.
问题在于,该引用与主域中其余代码的实例不同。 I wonder if exists any way to circumvent the execution isolation of appDomain to use the instance of the singleton?
我想知道是否存在任何方法可以避免appDomain的执行隔离以使用单例实例?
Here is the code: 这是代码:
AppDomain subdomain = this.CreatedChildDomain(AppDomain.CurrentDomain);
Instantiating class from subdomain 从子域实例化类
var loader = (InnerModuleInfoLoader) subdomain.
CreateInstanceFrom(loaderType.Assembly.Location, loaderType.FullName).Unwrap();
Inside InnerModuleInfoLoader: Bellow I would like that CacheLayer.Instance will be the same for parent and subdomains. 在InnerModuleInfoLoader内部:在下面,我希望CacheLayer.Instance对于父域和子域都相同。
var server = CacheLayer.Instance.Get<string>("Server");
Singleton 辛格尔顿
public sealed class CacheLayer
{
private static readonly CacheLayer instance = new CacheLayer();
private static readonly ObjectCache cache;
static CacheLayer()
{
cache = MemoryCache.Default;
}
private CacheLayer(){}
//More code omitted
}
Subdomain creation 子域创建
protected virtual AppDomain CreatedChildDomain(AppDomain parentDomain)
{
Evidence evidence = new Evidence(parentDomain.Evidence);
AppDomainSetup setup = parentDomain.SetupInformation;
return AppDomain.CreateDomain("ModuleFinder", evidence, setup);
}
I wonder if exists any way to circumvent the execution isolation of appDomain to use the instance of the singleton?
我想知道是否存在任何方法可以避免appDomain的执行隔离以使用单例实例?
You can use MarshalByRefObject
, that is, make your CacheLayer class inherit from it. 您可以使用
MarshalByRefObject
,即使CacheLayer类继承自它。
Keep in mind, marshaling calls between AppDomains comes at a performance penalty. 请记住,AppDomain之间的封送调用会降低性能。 I would consider just having two difference caches for each AppDomain.
我会考虑每个AppDomain仅具有两个不同的缓存。
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