/// <summary> /// Creates an instance of <see cref="CacheTagKey"/> for a specific <see cref="CacheTagHelper"/>. /// </summary> /// <param name="tagHelper">The <see cref="CacheTagHelper"/>.</param> /// <param name="context">The <see cref="TagHelperContext"/>.</param> /// <returns>A new <see cref="CacheTagKey"/>.</returns> public CacheTagKey(CacheTagHelper tagHelper, TagHelperContext context) : this(tagHelper) { Key = context.UniqueId; _prefix = nameof(CacheTagHelper); }
public async Task ProcessAsync_ExceptionInProcessing_DoesntBlockConcurrentRequests() { // Arrange var id = "unique-id"; var childContent = "some-content"; var event1 = new TaskCompletionSource <int>(TaskCreationOptions.RunContinuationsAsynchronously); var event2 = new TaskCompletionSource <int>(TaskCreationOptions.RunContinuationsAsynchronously); var event3 = new TaskCompletionSource <int>(TaskCreationOptions.RunContinuationsAsynchronously); var calls = 0; var cache = new MemoryCache(new MemoryCacheOptions()); var tagHelperContext1 = GetTagHelperContext(id + 1); var tagHelperContext2 = GetTagHelperContext(id + 2); var tagHelperOutput1 = new TagHelperOutput( "cache", new TagHelperAttributeList(), getChildContentAsync: (useCachedResult, encoder) => { calls++; event2.SetResult(0); throw new Exception(); }); var tagHelperOutput2 = new TagHelperOutput( "cache", new TagHelperAttributeList(), getChildContentAsync: async(useCachedResult, encoder) => { calls++; await event3.Task.TimeoutAfter(TimeSpan.FromSeconds(5)); var tagHelperContent = new DefaultTagHelperContent(); tagHelperContent.SetHtmlContent(childContent); return(tagHelperContent); }); var cacheTagHelper1 = new CacheTagHelper(new CacheTagHelperMemoryCacheFactory(cache), new HtmlTestEncoder()) { ViewContext = GetViewContext(), Enabled = true }; var cacheTagHelper2 = new CacheTagHelper(new CacheTagHelperMemoryCacheFactory(cache), new HtmlTestEncoder()) { ViewContext = GetViewContext(), Enabled = true }; // Act var task1 = Task.Run(async() => { await event1.Task.TimeoutAfter(TimeSpan.FromSeconds(5)); await Assert.ThrowsAsync <Exception>(() => cacheTagHelper1.ProcessAsync(tagHelperContext1, tagHelperOutput1)); event3.SetResult(0); }); var task2 = Task.Run(async() => { await event2.Task.TimeoutAfter(TimeSpan.FromSeconds(5)); await cacheTagHelper2.ProcessAsync(tagHelperContext2, tagHelperOutput2); }); event1.SetResult(0); await Task.WhenAll(task1, task2); // Assert Assert.Empty(tagHelperOutput1.PreContent.GetContent()); Assert.Empty(tagHelperOutput1.PostContent.GetContent()); Assert.False(tagHelperOutput1.IsContentModified); Assert.Empty(tagHelperOutput1.Content.GetContent()); Assert.Empty(tagHelperOutput2.PreContent.GetContent()); Assert.Empty(tagHelperOutput2.PostContent.GetContent()); Assert.True(tagHelperOutput2.IsContentModified); Assert.Equal(childContent, tagHelperOutput2.Content.GetContent()); Assert.Equal(2, calls); }
public async Task ProcessAsync_ExceptionInProcessing_DoNotThrowInSubsequentRequests() { // Arrange var id = "unique-id"; var childContent = "some-content"; var cache = new MemoryCache(new MemoryCacheOptions()); var counter = 0; Task <TagHelperContent> GetChildContentAsync(bool useCachedResult, HtmlEncoder encoder) { counter++; if (counter < 3) { // throw on first two calls throw new Exception(); } else { // produce content on third call var tagHelperContent = new DefaultTagHelperContent(); tagHelperContent.SetHtmlContent(childContent); return(Task.FromResult <TagHelperContent>(tagHelperContent)); } } var tagHelperContext1 = GetTagHelperContext(id); var tagHelperContext2 = GetTagHelperContext(id); var tagHelperContext3 = GetTagHelperContext(id); var tagHelperContext4 = GetTagHelperContext(id); var tagHelperOutput1 = new TagHelperOutput("cache", new TagHelperAttributeList(), GetChildContentAsync); var tagHelperOutput2 = new TagHelperOutput("cache", new TagHelperAttributeList(), GetChildContentAsync); var tagHelperOutput3 = new TagHelperOutput("cache", new TagHelperAttributeList(), GetChildContentAsync); var tagHelperOutput4 = new TagHelperOutput("cache", new TagHelperAttributeList(), GetChildContentAsync); var cacheTagHelper = new CacheTagHelper(new CacheTagHelperMemoryCacheFactory(cache), new HtmlTestEncoder()) { ViewContext = GetViewContext(), Enabled = true, ExpiresAfter = TimeSpan.FromHours(1.0) }; // Act - 1 await Assert.ThrowsAsync <Exception>(() => cacheTagHelper.ProcessAsync(tagHelperContext1, tagHelperOutput1)); // Assert - 1 Assert.Equal(1, counter); Assert.Empty(tagHelperOutput1.PreContent.GetContent()); Assert.Empty(tagHelperOutput1.PostContent.GetContent()); Assert.False(tagHelperOutput1.IsContentModified); Assert.Empty(tagHelperOutput1.Content.GetContent()); // Act - 2 await Assert.ThrowsAsync <Exception>(() => cacheTagHelper.ProcessAsync(tagHelperContext2, tagHelperOutput2)); // Assert - 2 Assert.Equal(2, counter); Assert.Empty(tagHelperOutput2.PreContent.GetContent()); Assert.Empty(tagHelperOutput2.PostContent.GetContent()); Assert.False(tagHelperOutput2.IsContentModified); Assert.Empty(tagHelperOutput2.Content.GetContent()); // Act - 3 await cacheTagHelper.ProcessAsync(tagHelperContext3, tagHelperOutput3); // Assert - 3 Assert.Equal(3, counter); Assert.Empty(tagHelperOutput3.PreContent.GetContent()); Assert.Empty(tagHelperOutput3.PostContent.GetContent()); Assert.True(tagHelperOutput3.IsContentModified); Assert.Equal(childContent, tagHelperOutput3.Content.GetContent()); // Act - 4 await cacheTagHelper.ProcessAsync(tagHelperContext4, tagHelperOutput4); // Assert - 4 Assert.Equal(3, counter); Assert.Empty(tagHelperOutput4.PreContent.GetContent()); Assert.Empty(tagHelperOutput4.PostContent.GetContent()); Assert.True(tagHelperOutput4.IsContentModified); Assert.Equal(childContent, tagHelperOutput4.Content.GetContent()); }
public async Task ProcessAsync_FlowsEntryLinkThatAllowsAddingTriggersToAddedEntry() { // Arrange var id = "some-id"; var expectedContent = new DefaultTagHelperContent(); expectedContent.SetContent("some-content"); var tokenSource = new CancellationTokenSource(); var cache = new MemoryCache(new MemoryCacheOptions() { TrackLinkedCacheEntries = true }); var cacheEntryOptions = new MemoryCacheEntryOptions() .AddExpirationToken(new CancellationChangeToken(tokenSource.Token)); var tagHelperContext = new TagHelperContext( tagName: "cache", allAttributes: new TagHelperAttributeList(), items: new Dictionary <object, object>(), uniqueId: id); var tagHelperOutput = new TagHelperOutput( "cache", new TagHelperAttributeList { { "attr", "value" } }, getChildContentAsync: (useCachedResult, encoder) => { if (!cache.TryGetValue("key1", out TagHelperContent tagHelperContent)) { tagHelperContent = expectedContent; cache.Set("key1", tagHelperContent, cacheEntryOptions); } return(Task.FromResult(tagHelperContent)); }); tagHelperOutput.PreContent.SetContent("<cache>"); tagHelperOutput.PostContent.SetContent("</cache>"); var cacheTagHelper = new CacheTagHelper(new CacheTagHelperMemoryCacheFactory(cache), new HtmlTestEncoder()) { ViewContext = GetViewContext(), }; var cacheTagKey = new CacheTagKey(cacheTagHelper, tagHelperContext); var key = cacheTagKey.GenerateKey(); // Act - 1 await cacheTagHelper.ProcessAsync(tagHelperContext, tagHelperOutput); var result = cache.TryGetValue(cacheTagKey, out Task <IHtmlContent> cachedValue); // Assert - 1 Assert.Equal("HtmlEncode[[some-content]]", tagHelperOutput.Content.GetContent()); Assert.True(result); // Act - 2 tokenSource.Cancel(); result = cache.TryGetValue(cacheTagKey, out cachedValue); // Assert - 2 Assert.False(result); Assert.Null(cachedValue); }