private void Invalidate(ItemLevelCachePart part)
{
InitializeSettings(part);
foreach (var settings in part.ItemLevelCacheSettings)
{
var displayType = settings.Key;
switch (settings.Value.InvalidationAction)
{
case ItemLevelCacheInvalidationAction.Evict:
mCacheService.RemoveByTag(ItemLevelCacheTag.For(part, displayType));
break;
case ItemLevelCacheInvalidationAction.PreRender:
var shape = mContentManager.BuildDisplay(part.ContentItem, displayType);
shape.BypassDonutTokenization = true;
var markup = (string)mShapeDisplay.Display(shape);
var cacheItem = new ItemLevelCacheItem(markup);
mCacheService.RemoveByTag(ItemLevelCacheTag.For(part, displayType));
// Give the markup to the item-level cache service which will cache it if required.
mItemLevelCacheService.CacheItem(part.ContentItem, displayType, cacheItem);
break;
}
}
}
protected override DriverResult Editor(ItemLevelCachePart part, dynamic shapeHelper)
{
var driverResults = new List <DriverResult>();
if (mAuthorizer.Authorize(ItemLevelCachePermissions.EditItemLevelCacheSettings))
{
driverResults.Add(ContentShape("Parts_ItemLevelCacheSettings_Edit", () => shapeHelper.EditorTemplate(TemplateName: "Parts/ItemLevelCacheSettings", Model: part, Prefix: Prefix)));
}
if (mAuthorizer.Authorize(ItemLevelCachePermissions.ViewItemLevelCacheItems))
{
driverResults.Add(ContentShape("Parts_ItemLevelCache_CacheItemsForContent", () =>
{
var outputCacheItems = mOutputCacheStorageProvider.GetCacheItems(0, mOutputCacheStorageProvider.GetCacheItemsCount()).Where(i => i.Tags.Contains(ItemLevelCacheTag.For(part)));
var vm = new CacheItemsForContentViewModel()
{
UserCanEvict = mAuthorizer.Authorize(ItemLevelCachePermissions.EvictItemLevelCacheItems),
Tag = ItemLevelCacheTag.For(part),
// TODO: Would it be more efficient to get all the cache keys using ITagCache, as opposed to getting all then filtering?
CacheItems = outputCacheItems.Select(ci => ci.ToCacheItemModel())
};
return(shapeHelper.EditorTemplate(TemplateName: "Parts/CacheItemsForContent", Model: vm, Prefix: Prefix));
}));
}
return(Combined(driverResults.ToArray()));
}
public void CacheItem_CachedItemIsAsExpected(int cacheDuration, int graceDuration, string markup)
{
var displayType = "AlwaysMiss";
var contentItem = ContentItem.WithPart(new ItemLevelCachePart(), "Article", 42);
contentItem.As <ItemLevelCachePart>().ItemLevelCacheSettings[displayType] = new ItemLevelCacheSettings
{
Mode = ItemLevelCacheMode.CacheItem,
CacheDurationSeconds = cacheDuration,
CacheGraceTimeSeconds = graceDuration
};
var cacheKey = mSut.GetCacheKey(contentItem, displayType);
mSut.CacheItem(contentItem, displayType, new ItemLevelCacheItem(markup));
var cachedItem = mCachedItems[cacheKey];
Assert.AreEqual(cacheKey, cachedItem.CacheKey);
Assert.AreEqual(cacheKey, cachedItem.InvariantCacheKey);
Assert.AreEqual(cacheDuration, cachedItem.Duration);
Assert.AreEqual(graceDuration, cachedItem.GraceTime);
Assert.AreEqual(markup, mJsonConvertor.Deserialize <ItemLevelCacheItem>(Encoding.UTF8.GetString(cachedItem.Output)).Markup);
Assert.AreEqual(mShellSettings.Name, cachedItem.Tenant);
Assert.AreEqual(mClock.Object.UtcNow, cachedItem.CachedOnUtc);
Assert.AreEqual(string.Empty, cachedItem.Url);
Assert.Contains(ItemLevelCacheTag.For(contentItem), cachedItem.Tags);
Assert.Contains(ItemLevelCacheTag.For(contentItem, displayType), cachedItem.Tags);
}
public void CacheItem(IContent contentItem, string displayType, ItemLevelCacheItem itemLevelCacheItem)
{
if (contentItem == null)
{
return;
}
var itemLevelCachePart = contentItem.As <ItemLevelCachePart>();
if (itemLevelCachePart == null || !itemLevelCachePart.ItemLevelCacheSettings.ContainsKey(displayType) || itemLevelCachePart.ItemLevelCacheSettings[displayType].Mode != ItemLevelCacheMode.CacheItem)
{
return;
}
var settings = itemLevelCachePart.ItemLevelCacheSettings[displayType];
var cacheKey = GetCacheKey(contentItem, displayType);
var cachedItem = mOutputCacheStorageProvider.GetCacheItem(cacheKey);
if (cachedItem == null || cachedItem.IsInGracePeriod(mClock.UtcNow)) // TODO: Should this method check the cache first, or just blindly insert?
{
var serializedCacheItem = mJsonConverter.Serialize(itemLevelCacheItem);
var cacheItem = new CacheItem()
{
CachedOnUtc = mClock.UtcNow,
Duration = settings.CacheDurationSeconds,
GraceTime = settings.CacheGraceTimeSeconds,
Output = mHttpContextAccessor.Current().Request.ContentEncoding.GetBytes(serializedCacheItem),
Tags = new[]
{
ItemLevelCacheTag.GenericTag,
ItemLevelCacheTag.For(contentItem),
ItemLevelCacheTag.For(contentItem, displayType),
ItemLevelCacheTag.For(contentItem.ContentItem.TypeDefinition)
},
Tenant = mShellSettings.Name,
CacheKey = cacheKey,
InvariantCacheKey = cacheKey,
Url = ""
};
mOutputCacheStorageProvider.Set(cacheKey, cacheItem);
// Also add the item tags to the tag cache.
foreach (var tag in cacheItem.Tags)
{
mTagCache.Tag(tag, cacheKey);
}
}
}
