Chr*_*tow 4 .net structuremap asp.net-mvc dependency-injection inversion-of-control
使用StructureMap,是否可以为参数的每个值设置一个单独的对象?例如,假设我想为多租户网络应用中的每个网站维护一个不同的单例:
For<ISiteSettings>().Singleton().Use<SiteSettings>();
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我想维护一个与每个站点对应的不同单例对象:
ObjectFactory.With<string>(requestHost).GetInstance<ISiteSettings>();
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目前,每当我尝试解析ISiteSettings时,它似乎都会创建一个新对象.
谢谢约书亚,我接受了你的建议.这是我完成的解决方案,似乎工作正常.任何反馈意见.
public class TenantLifecycle : ILifecycle
{
private readonly ConcurrentDictionary<string, MainObjectCache> _tenantCaches =
new ConcurrentDictionary<string, MainObjectCache>();
public IObjectCache FindCache()
{
var cache = _tenantCaches.GetOrAdd(TenantKey, new MainObjectCache());
return cache;
}
public void EjectAll()
{
FindCache().DisposeAndClear();
}
public string Scope
{
get { return "Tenant"; }
}
protected virtual string TenantKey
{
get
{
var requestHost = HttpContext.Current.Request.Url.Host;
var normalisedRequestHost = requestHost.ToLowerInvariant();
return normalisedRequestHost;
}
}
}
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使用StructureMap配置:
ObjectFactory.Initialize(
x => x.For<ISiteSettings>()
.LifecycleIs(new TenantLifecycle())
.Use<SiteSettings>()
);
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