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I am using MvcSiteMapProvider 4.6.3, MVC 4. Using DI to config the Sitemap.

this.For<System.Runtime.Caching.ObjectCache>()
    .Use(s => System.Runtime.Caching.MemoryCache.Default);

this.For(typeof (ICacheProvider<>)).Use(typeof (RuntimeCacheProvider<>));
var rootCacheDependency = this.For<ICacheDependency>().Use<RuntimeFileCacheDependency>()
    .Ctor<string>("fileName").Is(rootFileName);

var rootCacheDetails = this.For<ICacheDetails>().Use<CacheDetails>()
    .Ctor<TimeSpan>("absoluteCacheExpiration").Is(absoluteCacheExpiration)
    .Ctor<TimeSpan>("slidingCacheExpiration").Is(TimeSpan.MinValue)
    .Ctor<ICacheDependency>().Is(rootCacheDependency);

var cacheDetails = new List<SmartInstance<CacheDetails>>();
var xmlSources = new List<SmartInstance<FileXmlSource>>();

How to make it automatically update the cache when the Sitemap xml is updated?

I am upgrading MvcSitemapProvider from v3 to v4. In version 3, it seems the sitemap is automatically refreshed.

I did set the cache expiration time to be 5 min, is this causing problem?

TimeSpan absoluteCacheExpiration = TimeSpan.FromMinutes(5);

var rootCacheDetails = this.For<ICacheDetails>().Use<CacheDetails>()
            .Ctor<TimeSpan>("absoluteCacheExpiration").Is(absoluteCacheExpiration)
            .Ctor<TimeSpan>("slidingCacheExpiration").Is(TimeSpan.MinValue)
            .Ctor<ICacheDependency>().Is(rootCacheDependency);

UPDATE

When I change the sitemap xml file the cache is not updated till 5 min the cache expire. I am using multiple sitemap xml files.

        var sitmapPath = HostingEnvironment.MapPath("~/Sitemaps");
        var sitemaps = new List<string>();
        if (sitmapPath != null)
        {
            sitemaps.AddRange(Directory.GetFiles(sitmapPath, "*.sitemap"));
        }

        foreach (var sitemapFileName in sitemaps)
        {
            var cacheDependencie = 
                this.For<ICacheDependency>()
                .Use<RuntimeFileCacheDependency>()
                .Ctor<string>("fileName")
                .Is(sitemapFileName);

            cacheDetails.Add(this.For<ICacheDetails>().Use<CacheDetails>()
            .Ctor<TimeSpan>("absoluteCacheExpiration").Is(absoluteCacheExpiration)
            .Ctor<TimeSpan>("slidingCacheExpiration").Is(TimeSpan.MinValue)
            .Ctor<ICacheDependency>().Is(cacheDependencie));

            xmlSources.Add(this.For<IXmlSource>().Use<FileXmlSource>()
                .Ctor<string>("fileName").Is(sitemapFileName));
        }

Will this be the reason it's not working?

4

1 回答 1

0

我认为您发布的代码没有问题。但是，当 XML 更改时，它会重新加载 RuntimeFileCacheDependency。

RuntimeFileCacheDependency 期望 fileName 参数是绝对路径。因此，在将其提供给 RuntimeFileCacheDependency 构造函数之前，您必须使用 HostingEnvironment.MapPath 对其进行转换。

var rootFileName = HostingEnvironment.MapPath("~/root.sitemap");

回复您的更新

cacheDetails 对象的目的是为单个 SiteMapBuilderSet 实例指定缓存策略。如果您进一步查看（原始）DI 模块，请注意该变量已传递给此类的构造函数。

// Configure the builder sets
this.For<ISiteMapBuilderSetStrategy>().Use<SiteMapBuilderSetStrategy>()
    .EnumerableOf<ISiteMapBuilderSet>().Contains(x =>
    {
        x.Type<SiteMapBuilderSet>()
            .Ctor<string>("instanceName").Is("default")
            .Ctor<bool>("securityTrimmingEnabled").Is(securityTrimmingEnabled)
            .Ctor<bool>("enableLocalization").Is(enableLocalization)
            .Ctor<bool>("visibilityAffectsDescendants").Is(visibilityAffectsDescendants)
            .Ctor<bool>("useTitleIfDescriptionNotProvided").Is(useTitleIfDescriptionNotProvided)
            .Ctor<ISiteMapBuilder>().Is(builder)
            .Ctor<ICacheDetails>().Is(cacheDetails); // <- caching specified here explicitly.
    });

这是用于使缓存过期的内容，但它是与指定使用多个文件来构建 SiteMap 的部分完全分开的机制：

// Register the sitemap node providers
var siteMapNodeProvider = this.For<ISiteMapNodeProvider>().Use<CompositeSiteMapNodeProvider>()
    .EnumerableOf<ISiteMapNodeProvider>().Contains(x =>
    {
        x.Type<XmlSiteMapNodeProvider>()
            .Ctor<bool>("includeRootNode").Is(true)
            .Ctor<bool>("useNestedDynamicNodeRecursion").Is(false)
            .Ctor<IXmlSource>().Is(rootXmlSource);
        
        // NOTE: Each additional XmlSiteMapNodeProvider instance for the same SiteMap instance must
        // specify includeRootNode as "false"
        x.Type<XmlSiteMapNodeProvider>()
            .Ctor<bool>("includeRootNode").Is(false)
            .Ctor<bool>("useNestedDynamicNodeRecursion").Is(false)
            .Ctor<IXmlSource>().Is(childXmlSource1);
        x.Type<XmlSiteMapNodeProvider>()
            .Ctor<bool>("includeRootNode").Is(false)
            .Ctor<bool>("useNestedDynamicNodeRecursion").Is(false)
            .Ctor<IXmlSource>().Is(childXmlSource2);
        
        // Add additional XmlSiteMapNodeProviders here (with includeRootNode as "false")...
            
        // You only need this if you intend to use MvcSiteMapNodeAttribute in your application
        x.Type<ReflectionSiteMapNodeProvider>()
            .Ctor<IEnumerable<string>>("includeAssemblies").Is(includeAssembliesForScan)
            .Ctor<IEnumerable<string>>("excludeAssemblies").Is(new string[0]);
    });

// Register the sitemap builders
var builder = this.For<ISiteMapBuilder>().Use<SiteMapBuilder>()
    .Ctor<ISiteMapNodeProvider>().Is(siteMapNodeProvider);

这是为单个 SiteMap 指定多个 XML 文件的方法，但也可以通过将 XmlSiteMapNodeProvider 的每个实例传递给单独的 SiteMapBuilder 和单独的 SiteMapBuilderSet 使每个 XML 文件成为其自己的 SiteMap 实例，如在一个应用程序中的多个 SiteMaps 中所述.

重要提示：要使多个 XML 文件在单个 SiteMap 实例上工作，您必须为每个 SiteMap 的根节点指定相同的键，如本答案底部所示。但是您不能在多个 XML 文件（根节点除外）中指定代表同一控制器操作的节点。

如果您需要更多的灵活性，我建议您实现自己的 XmlSiteMapNodeProvider 或完全放弃使用 XML 的想法，因为使用 ISiteMapNodeProvider 或 IDynamicNodeProvider 更加灵活。

现在，回到缓存。如果您确实在同一个 SiteMap 实例中使用多个 XML 文件，则需要使用 RuntimeCompositeCacheDependency 以便每个文件都将被视为同一个缓存的依赖项，但您必须使用 CacheDetails 的单个实例。

var rootCacheDependency =
    this.For<ICacheDependency>().Use<RuntimeFileCacheDependency>()
        .Ctor<string>("fileName").Is(rootAbsoluteFileName);

var childCacheDependency1 =
    this.For<ICacheDependency>().Use<RuntimeFileCacheDependency>()
        .Ctor<string>("fileName").Is(childAbsoluteFileName1);
        
var childCacheDependency2 =
    this.For<ICacheDependency>().Use<RuntimeFileCacheDependency>()
        .Ctor<string>("fileName").Is(childAbsoluteFileName2);


var cacheDependency =
    this.For<ICacheDependency>().Use<RuntimeCompositeCacheDependency>()
        .Ctor<ICacheDependency[]>().Is(new ICacheDependency[] 
        { 
            (ICacheDependency)rootCacheDependency, 
            (ICacheDependency)childCacheDependency1,
            (ICacheDependency)childCacheDependency2             
        });


var cacheDetails =
    this.For<ICacheDetails>().Use<CacheDetails>()
        .Ctor<TimeSpan>("absoluteCacheExpiration").Is(absoluteCacheExpiration)
        .Ctor<TimeSpan>("slidingCacheExpiration").Is(TimeSpan.MinValue)
        .Ctor<ICacheDependency>().Is(cacheDependency);
于 2014-05-23T08:04:30.430 回答