public void AbsoluteExpirationExpiresInBackground()
{
var clock = new TestClock();
var cache = CreateCache(clock);
var key = "myKey";
var value = new object();
var callbackInvoked = new ManualResetEvent(false);
var options = new MemoryCacheEntryOptions()
.SetAbsoluteExpiration(clock.UtcNow + TimeSpan.FromMinutes(1))
.RegisterPostEvictionCallback((subkey, subValue, reason, state) =>
{
// TODO: Verify params
var localCallbackInvoked = (ManualResetEvent)state;
localCallbackInvoked.Set();
}, callbackInvoked);
var result = cache.Set(key, value, options);
Assert.Same(value, result);
var found = cache.TryGetValue(key, out result);
Assert.True(found);
Assert.Same(value, result);
clock.Add(TimeSpan.FromMinutes(2));
var ignored = cache.Get("otherKey"); // Background expiration checks are triggered by misc cache activity.
Assert.True(callbackInvoked.WaitOne(TimeSpan.FromSeconds(30)), "Callback");
found = cache.TryGetValue(key, out result);
Assert.False(found);
Assert.Null(result);
}
public MetadataReference GetMetadataReference(string path)
{
var cacheKey = _cacheKeyPrefix + path.ToLowerInvariant();
var metadata = _cache.Get<AssemblyMetadata>(cacheKey);
if (metadata == null)
{
_logger.LogDebug(string.Format("Cache miss {0}", path));
using (var stream = File.OpenRead(path))
{
var moduleMetadata = ModuleMetadata.CreateFromStream(stream, PEStreamOptions.PrefetchMetadata);
metadata = AssemblyMetadata.Create(moduleMetadata);
var options = new MemoryCacheEntryOptions();
options.ExpirationTokens.Add(new FileWriteTimeTrigger(path));
_cache.Set(cacheKey, metadata, options);
}
}
var documentationFile = Path.ChangeExtension(path, ".xml");
if (File.Exists(documentationFile))
{
return metadata.GetReference(new XmlDocumentationProvider(documentationFile));
}
return metadata.GetReference();
}
/// <summary>Static constructor.</summary>
static QueryCacheManager()
{
Cache = new MemoryCache(new MemoryCacheOptions());
DefaultMemoryCacheEntryOptions = new MemoryCacheEntryOptions();
CachePrefix = "Z.EntityFramework.Plus.QueryCacheManager;";
CacheTags = new ConcurrentDictionary<string, List<string>>();
}
public static void Main(string[] args)
{
// Runs several concurrent threads that access an item that periodically expires and is re-created.
MemoryCache cache = new MemoryCache(new MemoryCacheOptions());
string key = "MyKey";
var options = new MemoryCacheEntryOptions().SetAbsoluteExpiration(TimeSpan.FromMilliseconds(50));
var tasks = new List<Task>();
for (int threads = 0; threads < 100; threads++)
{
var task = Task.Run(() =>
{
for (int i = 0; i < 110000; i++)
{
object value;
if(!cache.TryGetValue(key, out value))
{
// Fake expensive object creation.
for (int j = 0; j < 1000000; j++)
{
}
cache.Set(key, new object(), options);
}
}
});
tasks.Add(task);
}
Console.WriteLine("Running");
Task.WaitAll(tasks.ToArray());
Console.WriteLine("Done");
}
/// <inheritdoc />
public ChunkTree GetOrAdd(
string pagePath,
Func<IFileInfo, ChunkTree> getChunkTree)
{
if (pagePath == null)
{
throw new ArgumentNullException(nameof(pagePath));
}
if (getChunkTree == null)
{
throw new ArgumentNullException(nameof(getChunkTree));
}
ChunkTree chunkTree;
if (!_chunkTreeCache.TryGetValue(pagePath, out chunkTree))
{
// GetOrAdd is invoked for each _ViewImport that might potentially exist in the path.
// We can avoid performing file system lookups for files that do not exist by caching
// negative results and adding a Watch for that file.
var options = new MemoryCacheEntryOptions()
.AddExpirationToken(_fileProvider.Watch(pagePath))
.SetSlidingExpiration(SlidingExpirationDuration);
var file = _fileProvider.GetFileInfo(pagePath);
chunkTree = file.Exists ? getChunkTree(file) : null;
_chunkTreeCache.Set(pagePath, chunkTree, options);
}
return chunkTree;
}
public void TestDefaultOptions()
{
var options = EntryOptions.Default;
Assert.Equal(options.Behaviors, EntryBehaviors.Default);
Assert.Null(options.AbsoluteExpiration);
Assert.Null(options.AbsoluteExpirationRelativeToNow);
Assert.Equal(options.SlidingExpiration, TimeSpan.FromMinutes(30));
Assert.True((options.Behaviors & EntryBehaviors.LookupCache) == EntryBehaviors.LookupCache);
Assert.True((options.Behaviors & EntryBehaviors.SaveToCache) == EntryBehaviors.SaveToCache);
Assert.True((options.Behaviors & EntryBehaviors.ReQueryWhenErrorCached) == EntryBehaviors.ReQueryWhenErrorCached);
var cacheOptions = new MemoryCacheEntryOptions
{
AbsoluteExpiration = options.AbsoluteExpiration,
AbsoluteExpirationRelativeToNow = options.AbsoluteExpirationRelativeToNow,
SlidingExpiration = options.SlidingExpiration
};
Assert.Equal(cacheOptions.SlidingExpiration, TimeSpan.FromMinutes(30));
Assert.Null(cacheOptions.AbsoluteExpiration);
Assert.Null(cacheOptions.AbsoluteExpirationRelativeToNow);
}
public CqrsMemoryCache()
{
_cache = new MemoryCache(new MemoryCacheOptions() { ExpirationScanFrequency = new TimeSpan(0, 0, 15, 0) });
_memoryCacheEntryOptions = new MemoryCacheEntryOptions()
{
SlidingExpiration = new TimeSpan(0, 0, 15, 0)
};
}
/// <summary>
/// Adds version query parameter to the specified file path.
/// </summary>
/// <param name="path">The path of the file to which version should be added.</param>
/// <returns>Path containing the version query string.</returns>
/// <remarks>
/// The version query string is appended with the key "v".
/// </remarks>
public string AddFileVersionToPath(string path)
{
if (path == null)
{
throw new ArgumentNullException(nameof(path));
}
var resolvedPath = path;
var queryStringOrFragmentStartIndex = path.IndexOfAny(QueryStringAndFragmentTokens);
if (queryStringOrFragmentStartIndex != -1)
{
resolvedPath = path.Substring(0, queryStringOrFragmentStartIndex);
}
Uri uri;
if (Uri.TryCreate(resolvedPath, UriKind.Absolute, out uri) && !uri.IsFile)
{
// Don't append version if the path is absolute.
return path;
}
string value;
if (!_cache.TryGetValue(path, out value))
{
var cacheEntryOptions = new MemoryCacheEntryOptions();
cacheEntryOptions.AddExpirationToken(_fileProvider.Watch(resolvedPath));
var fileInfo = _fileProvider.GetFileInfo(resolvedPath);
if (!fileInfo.Exists &&
_requestPathBase.HasValue &&
resolvedPath.StartsWith(_requestPathBase.Value, StringComparison.OrdinalIgnoreCase))
{
var requestPathBaseRelativePath = resolvedPath.Substring(_requestPathBase.Value.Length);
cacheEntryOptions.AddExpirationToken(_fileProvider.Watch(requestPathBaseRelativePath));
fileInfo = _fileProvider.GetFileInfo(requestPathBaseRelativePath);
}
if (fileInfo.Exists)
{
value = QueryHelpers.AddQueryString(path, VersionKey, GetHashForFile(fileInfo));
}
else
{
// if the file is not in the current server.
value = path;
}
value = _cache.Set<string>(path, value, cacheEntryOptions);
}
return value;
}
public void Set <T>(string key, T cachedValue, MemoryCacheEntryOptions options = null) where T : class
{
var entryOptions = new ms.MemoryCacheEntryOptions();
if (options != null)
{
entryOptions.SlidingExpiration = options.SlidingExpiration;
entryOptions.RegisterPostEvictionCallback((entryKey, value, reason, substate) => options.Callback?.Invoke(entryKey.ToString(), value, reason, substate));
}
_memoryCache.Set(key, cachedValue, entryOptions);
}
public Task RenewAsync(string key, AuthenticationTicket ticket) {
var options = new MemoryCacheEntryOptions();
var expiresUtc = ticket.Properties.ExpiresUtc;
if(expiresUtc.HasValue) {
options.SetAbsoluteExpiration(expiresUtc.Value);
}
options.SetSlidingExpiration(TimeSpan.FromHours(1)); // TODO: configurable.
_cache.Set(key, ticket, options);
return Task.FromResult(0);
}
public async void SetCoreAsync_And_GetCoreAsync()
{
var cache = new ServiceCollection().AddMemoryCache().BuildServiceProvider().GetRequiredService <Microsoft.Extensions.Caching.Memory.IMemoryCache>();
var options = new Microsoft.Extensions.Caching.Memory.MemoryCacheEntryOptions
{
AbsoluteExpirationRelativeToNow = TimeSpan.FromSeconds(2)
};
var memoryCache = new Memory.MemoryCache("foobar", cache, options);
await memoryCache.SetCoreAsync("key1", 123);
Assert.Equal(123, cache.TryGetValue("key1", out object value) ? value : null);
Assert.Equal(123, (await memoryCache.GetCoreAsync("key1", null)).Value);
}
public void Set(string key, byte[] value, DistributedCacheEntryOptions options)
{
if (key == null)
{
throw new ArgumentNullException(nameof(key));
}
var memoryCacheEntryOptions = new MemoryCacheEntryOptions();
memoryCacheEntryOptions.AbsoluteExpiration = options.AbsoluteExpiration;
memoryCacheEntryOptions.AbsoluteExpirationRelativeToNow = options.AbsoluteExpirationRelativeToNow;
memoryCacheEntryOptions.SlidingExpiration = options.SlidingExpiration;
_memCache.Set(key, value, memoryCacheEntryOptions);
}
internal CacheEntry(
object key,
object value,
DateTimeOffset utcNow,
DateTimeOffset? absoluteExpiration,
MemoryCacheEntryOptions options,
Action<CacheEntry> notifyCacheOfExpiration)
{
Key = key;
Value = value;
LastAccessed = utcNow;
Options = options;
_notifyCacheOfExpiration = notifyCacheOfExpiration;
_absoluteExpiration = absoluteExpiration;
PostEvictionCallbacks = options.PostEvictionCallbacks;
}
public async Task<int> GetFeatureHashAsync(string featureId)
{
var cacheKey = FeatureHashCacheKey + ":" + featureId;
bool enabled;
if (!_memoryCache.TryGetValue(cacheKey, out enabled))
{
enabled =
(await _featureManager.GetEnabledFeaturesAsync())
.Any(x => x.Name.Equals(featureId));
var options = new MemoryCacheEntryOptions()
.AddExpirationToken(_signal.GetToken(FeatureManager.FeatureManagerCacheKey));
_memoryCache.Set(cacheKey, enabled, options);
}
return enabled ? 1 : 0;
}
public async Task<int> GetFeatureHashAsync()
{
int serial;
if (_memoryCache.TryGetValue(FeatureHashCacheKey, out serial))
{
return serial;
}
// Calculate a hash of all enabled features' name
serial = (await _featureManager.GetEnabledFeaturesAsync())
.OrderBy(x => x.Name)
.Aggregate(0, (a, f) => a * 7 + f.Name.GetHashCode());
var options = new MemoryCacheEntryOptions()
.AddExpirationToken(_signal.GetToken(FeatureManager.FeatureManagerCacheKey));
_memoryCache.Set(FeatureHashCacheKey, serial, options);
return serial;
}
// This method gets called by the runtime. Use this method to configure the HTTP request pipeline.
public void Configure(IApplicationBuilder app, IWebHostEnvironment env, IMemoryCache cache)
{
var entryOptions = new Microsoft.Extensions.Caching.Memory.MemoryCacheEntryOptions().
SetPriority(CacheItemPriority.NeverRemove);
cache.Set("kenobi", new CacheValue {
Distance = "", message = new string[] { }
}, entryOptions);
cache.Set("skywalker", new CacheValue {
Distance = "", message = new string[] { }
}, entryOptions);
cache.Set("sato", new CacheValue {
Distance = "", message = new string[] { }
}, entryOptions);
if (env.IsDevelopment())
{
app.UseDeveloperExceptionPage();
}
app.UseRouting();
app.UseSwagger();
app.UseSwaggerUI(c =>
{
c.SwaggerEndpoint("/swagger/v1/swagger.json", "MELI Challenge API V1");
});
app.UseAuthorization();
app.UseEndpoints(endpoints =>
{
endpoints.MapControllers();
});
}
public static TItem Set <TItem>(this FileCache cache, object key, TItem value, MemoryCacheEntryOptions options)
{
using (var entry = cache.CreateEntry(key))
{
if (options != null)
{
entry.SetOptions(options);
}
entry.Value = value;
if (cache.Get(key) != null)
{
cache.Persist <TItem>(entry);
}
}
return(value);
}
public static TItem Set <TItem>(this IMemoryCache cache, object key, TItem value, MemoryCacheEntryOptions options, IDropOutToken dropOutToken = null)
{
using (var entry = cache.CreateEntry(key))
{
if (options != null)
{
entry.SetOptions(options);
}
entry.Value = value;
entry.DropOutToken = dropOutToken;
}
return(value);
}
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());
var cacheEntryOptions = new MemoryCacheEntryOptions()
.AddExpirationToken(new CancellationChangeToken(tokenSource.Token));
var tagHelperContext = new TagHelperContext(
allAttributes: new TagHelperAttributeList(),
items: new Dictionary<object, object>(),
uniqueId: id);
var tagHelperOutput = new TagHelperOutput(
"cache",
new TagHelperAttributeList { { "attr", "value" } },
getChildContentAsync: useCachedResult =>
{
TagHelperContent tagHelperContent;
if (!cache.TryGetValue("key1", out tagHelperContent))
{
tagHelperContent = expectedContent;
cache.Set("key1", tagHelperContent, cacheEntryOptions);
}
return Task.FromResult(tagHelperContent);
});
tagHelperOutput.PreContent.SetContent("<cache>");
tagHelperOutput.PostContent.SetContent("</cache>");
var cacheTagHelper = new CacheTagHelper(cache, new HtmlTestEncoder())
{
ViewContext = GetViewContext(),
};
var key = cacheTagHelper.GenerateKey(tagHelperContext);
// Act - 1
await cacheTagHelper.ProcessAsync(tagHelperContext, tagHelperOutput);
IHtmlContent cachedValue;
var result = cache.TryGetValue(key, out cachedValue);
// Assert - 1
Assert.Equal("HtmlEncode[[some-content]]", tagHelperOutput.Content.GetContent());
Assert.True(result);
// Act - 2
tokenSource.Cancel();
result = cache.TryGetValue(key, out cachedValue);
// Assert - 2
Assert.False(result);
Assert.Null(cachedValue);
}
/// <summary> /// Forces the absolute expiration. /// </summary> /// <param name="options">The options.</param> /// <param name="delay">The delay.</param> /// <returns>MemoryCacheEntryOptions.</returns> public static MemoryCacheEntryOptions ForceAbsoluteExpiration(this MemoryCacheEntryOptions options, TimeSpan delay) => options.AddExpirationToken(new CancellationChangeToken(new CancellationTokenSource(delay).Token));
// Internal for unit testing
internal MemoryCacheEntryOptions GetMemoryCacheEntryOptions()
{
var options = new MemoryCacheEntryOptions();
if (ExpiresOn != null)
{
options.SetAbsoluteExpiration(ExpiresOn.Value);
}
if (ExpiresAfter != null)
{
options.SetAbsoluteExpiration(ExpiresAfter.Value);
}
if (ExpiresSliding != null)
{
options.SetSlidingExpiration(ExpiresSliding.Value);
}
if (Priority != null)
{
options.SetPriority(Priority.Value);
}
return options;
}
internal static void AddIdentityToCache(Guid userId, ErpIdentity identity)
{
var options = new MemoryCacheEntryOptions();
options.SetAbsoluteExpiration(TimeSpan.FromMinutes(5));
cache.Set(userId.ToString(), identity, options);
}
/// <summary>
/// Initializes a new instance of the <see cref="MemoryCacheRegistration"/> class.
/// </summary>
/// <param name="name">The name.</param>
/// <param name="entryOptions">The entry options.</param>
/// <param name="builder">The builder.</param>
/// <param name="cacheTags">The cache tags.</param>
public MemoryCacheRegistration(string name, MemoryCacheEntryOptions entryOptions, CacheItemBuilder builder, params string[] cacheTags)
: this(new StackTrace(), name, entryOptions, builder, null, cacheTags != null && cacheTags.Length > 0 ? (a, b) => cacheTags : (Func <object, object[], string[]>)null)
{
}
/// <summary>
/// Sets the cache entry change expiration.
/// </summary>
/// <param name="options">The options.</param>
/// <param name="cache">The cache.</param>
/// <param name="key">The key.</param>
/// <returns>MemoryCacheEntryOptions.</returns>
public static MemoryCacheEntryOptions SetCacheEntryChangeExpiration(this MemoryCacheEntryOptions options, IMemoryCache cache, string key)
{
options.AddExpirationToken(MakeCacheEntryChangeToken(cache, new[] { key }));
return(options);
}
public void RemoveAndReAddFromCallbackWorks()
{
var cache = CreateCache();
var value = new object();
var obj2 = new object();
string key = "myKey";
var callbackInvoked = new ManualResetEvent(false);
var options = new MemoryCacheEntryOptions();
options.PostEvictionCallbacks.Add(new PostEvictionCallbackRegistration()
{
EvictionCallback = (subkey, subValue, reason, state) =>
{
Assert.Equal(key, subkey);
Assert.Same(subValue, value);
Assert.Equal(EvictionReason.Removed, reason);
var localCallbackInvoked = (ManualResetEvent)state;
cache.Set(key, obj2);
localCallbackInvoked.Set();
},
State = callbackInvoked
});
var result = cache.Set(key, value, options);
Assert.Same(value, result);
cache.Remove(key);
Assert.True(callbackInvoked.WaitOne(TimeSpan.FromSeconds(30)), "Callback");
result = cache.Get(key);
Assert.Same(obj2, result);
}
/// <summary>
/// Add a new state to the cache and set a custom cache item policy
/// </summary>
/// <param name="key"></param>
/// <param name="state"></param>
/// <param name="policy"></param>
public void Add(string key, HandshakeState state, MemoryCacheEntryOptions options)
{
this.Cache.Set(key, state, options);
}
public static TItem Set <TItem>(this IMemoryCache cache, object key, TItem value, MemoryCacheEntryOptions options)
{
using ICacheEntry entry = cache.CreateEntry(key);
if (options != null)
{
entry.SetOptions(options);
}
entry.Value = value;
return(value);
}
/// <param name="cache">Must be thread safe.</param>
public static async Task <TItem> AtomicGetOrCreateAsync <TItem>(this IMemoryCache cache, object key, MemoryCacheEntryOptions options, Func <Task <TItem> > factory)
{
if (cache.TryGetValue(key, out TItem value))
{
return(value);
}
AsyncLock asyncLock;
lock (AsyncLocksLock)
{
// If we have no dic for the cache yet then create one.
if (!AsyncLocks.TryGetValue(cache, out Dictionary <object, AsyncLock> cacheDic))
{
cacheDic = new Dictionary <object, AsyncLock>();
AsyncLocks.Add(cache, cacheDic);
}
if (!cacheDic.TryGetValue(key, out asyncLock))
{
asyncLock = new AsyncLock();
cacheDic.Add(key, asyncLock);
}
}
using (await asyncLock.LockAsync().ConfigureAwait(false))
{
if (!cache.TryGetValue(key, out value))
{
value = await factory.Invoke().ConfigureAwait(false);
cache.Set(key, value, options);
lock (AsyncLocksLock)
{
var cacheDic = AsyncLocks[cache];
// Note that if a cache is disposed, then the cleanup will never happen. This should not cause normally issues, but keep in mind.
// Cleanup the evicted asynclocks.
foreach (var toRemove in cacheDic.Keys.Where(x => !cache.TryGetValue(x, out _)).ToList())
{
cacheDic.Remove(toRemove);
}
}
}
return(value);
}
}
private Task<CompilerCacheResult> CreateCacheEntry(
string normalizedPath,
Func<RelativeFileInfo, CompilationResult> compile)
{
TaskCompletionSource<CompilerCacheResult> compilationTaskSource = null;
MemoryCacheEntryOptions cacheEntryOptions = null;
IFileInfo fileInfo = null;
Task<CompilerCacheResult> cacheEntry;
// Safe races cannot be allowed when compiling Razor pages. To ensure only one compilation request succeeds
// per file, we'll lock the creation of a cache entry. Creating the cache entry should be very quick. The
// actual work for compiling files happens outside the critical section.
lock (_cacheLock)
{
if (_cache.TryGetValue(normalizedPath, out cacheEntry))
{
return cacheEntry;
}
fileInfo = _fileProvider.GetFileInfo(normalizedPath);
if (!fileInfo.Exists)
{
var expirationToken = _fileProvider.Watch(normalizedPath);
cacheEntry = Task.FromResult(new CompilerCacheResult(new[] { expirationToken }));
cacheEntryOptions = new MemoryCacheEntryOptions();
cacheEntryOptions.AddExpirationToken(expirationToken);
}
else
{
cacheEntryOptions = GetMemoryCacheEntryOptions(normalizedPath);
// A file exists and needs to be compiled.
compilationTaskSource = new TaskCompletionSource<CompilerCacheResult>();
cacheEntry = compilationTaskSource.Task;
}
cacheEntry = _cache.Set<Task<CompilerCacheResult>>(normalizedPath, cacheEntry, cacheEntryOptions);
}
if (compilationTaskSource != null)
{
// Indicates that the file was found and needs to be compiled.
Debug.Assert(fileInfo != null && fileInfo.Exists);
Debug.Assert(cacheEntryOptions != null);
var relativeFileInfo = new RelativeFileInfo(fileInfo, normalizedPath);
try
{
var compilationResult = compile(relativeFileInfo);
compilationResult.EnsureSuccessful();
compilationTaskSource.SetResult(
new CompilerCacheResult(compilationResult, cacheEntryOptions.ExpirationTokens));
}
catch (Exception ex)
{
compilationTaskSource.SetException(ex);
}
}
return cacheEntry;
}
/// <summary>
/// Expire the cache entry if the given <see cref="IChangeToken"/> expires.
/// </summary>
/// <param name="options">The <see cref="MemoryCacheEntryOptions"/>.</param>
/// <param name="expirationToken">The <see cref="IChangeToken"/> that causes the cache entry to expire.</param>
/// <returns>The <see cref="MemoryCacheEntryOptions"/> so that additional calls can be chained.</returns>
public static MemoryCacheEntryOptions AddExpirationToken(
this MemoryCacheEntryOptions options,
IChangeToken expirationToken !!)
{
/// <summary>
/// Initializes a new instance of the <see cref="MemoryCacheRegistration"/> class.
/// </summary>
/// <param name="name">The name.</param>
/// <param name="entryOptions">The entry options.</param>
/// <param name="builder">The builder.</param>
/// <param name="cacheTags">The cache tags.</param>
public MemoryCacheRegistration(string name, MemoryCacheEntryOptions entryOptions, CacheItemBuilder builder, Func <object, object[], string[]> cacheTags)
: this(new StackTrace(), name, entryOptions, builder, null, cacheTags)
{
}
public object Set(object key, object value, MemoryCacheEntryOptions options)
{
return new object();
}
public object Set(object key, object value, MemoryCacheEntryOptions cacheEntryOptions)
{
throw new NotImplementedException();
}
private CompilerCacheResult CreateCacheEntry(
string normalizedPath,
Func<RelativeFileInfo, CompilationResult> compile)
{
CompilerCacheResult cacheResult;
var fileInfo = _fileProvider.GetFileInfo(normalizedPath);
MemoryCacheEntryOptions cacheEntryOptions;
CompilerCacheResult cacheResultToCache;
if (!fileInfo.Exists)
{
cacheResultToCache = CompilerCacheResult.FileNotFound;
cacheResult = CompilerCacheResult.FileNotFound;
cacheEntryOptions = new MemoryCacheEntryOptions();
cacheEntryOptions.AddExpirationToken(_fileProvider.Watch(normalizedPath));
}
else
{
var relativeFileInfo = new RelativeFileInfo(fileInfo, normalizedPath);
var compilationResult = compile(relativeFileInfo).EnsureSuccessful();
cacheEntryOptions = GetMemoryCacheEntryOptions(normalizedPath);
// By default the CompilationResult returned by IRoslynCompiler is an instance of
// UncachedCompilationResult. This type has the generated code as a string property and do not want
// to cache it. We'll instead cache the unwrapped result.
cacheResultToCache = new CompilerCacheResult(
CompilationResult.Successful(compilationResult.CompiledType));
cacheResult = new CompilerCacheResult(compilationResult);
}
_cache.Set(normalizedPath, cacheResultToCache, cacheEntryOptions);
return cacheResult;
}
public object Set(object key, object value, MemoryCacheEntryOptions cacheEntryOptions)
{
if (key == null)
{
throw new ArgumentNullException(nameof(key));
}
CheckDisposed();
CacheEntry priorEntry = null;
var utcNow = _clock.UtcNow;
DateTimeOffset?absoluteExpiration = null;
if (cacheEntryOptions.AbsoluteExpirationRelativeToNow.HasValue)
{
absoluteExpiration = utcNow + cacheEntryOptions.AbsoluteExpirationRelativeToNow;
}
else if (cacheEntryOptions.AbsoluteExpiration.HasValue)
{
if (cacheEntryOptions.AbsoluteExpiration <= utcNow)
{
throw new ArgumentOutOfRangeException(
nameof(MemoryCacheEntryOptions.AbsoluteExpiration),
cacheEntryOptions.AbsoluteExpiration.Value,
"The absolute expiration value must be in the future.");
}
absoluteExpiration = cacheEntryOptions.AbsoluteExpiration;
}
var entry = new CacheEntry(
key,
value,
utcNow,
absoluteExpiration,
cacheEntryOptions,
_entryExpirationNotification);
var link = EntryLinkHelpers.ContextLink;
if (link != null)
{
// Copy expiration tokens and AbsoluteExpiration to the link.
// We do this regardless of it gets cached because the tokens are associated with the value we'll return.
if (entry.Options.ExpirationTokens != null)
{
link.AddExpirationTokens(entry.Options.ExpirationTokens);
}
if (absoluteExpiration.HasValue)
{
link.SetAbsoluteExpiration(absoluteExpiration.Value);
}
}
bool added = false;
_entryLock.EnterWriteLock();
try
{
if (_entries.TryGetValue(key, out priorEntry))
{
_entries.Remove(key);
priorEntry.SetExpired(EvictionReason.Replaced);
}
if (!entry.CheckExpired(utcNow))
{
_entries[key] = entry;
entry.AttachTokens();
added = true;
}
}
finally
{
_entryLock.ExitWriteLock();
}
if (priorEntry != null)
{
priorEntry.InvokeEvictionCallbacks();
}
if (!added)
{
entry.InvokeEvictionCallbacks();
}
StartScanForExpiredItems();
return(value);
}
/// <inheritdoc />
public IAndMemoryCacheBuilder WithEntry(object key, object value, MemoryCacheEntryOptions options)
{
this.MemoryCache.Set(key, value, options);
return this;
}
/// <summary>
/// Gets a cache item policy.
/// </summary>
/// <param name="minutes">Absolute expiration time in x minutes</param>
/// <returns></returns>
private static MemoryCacheEntryOptions GetCacheEntryOptions(int minutes)
{
var cacheEntryOptions = new MemoryCacheEntryOptions()
{
Priority = CacheItemPriority.Normal,
AbsoluteExpiration = DateTimeOffset.Now.AddMinutes(minutes)
//RemovedCallback = (item) =>
//{
// // dispose cached item at removal
// var asDisposable = item.CacheItem as IDisposable;
// if (asDisposable != null)
// asDisposable.Dispose();
//}
};
return cacheEntryOptions;
}
private MemoryCacheEntryOptions GetMemoryCacheEntryOptions(string relativePath)
{
var options = new MemoryCacheEntryOptions();
options.AddExpirationToken(_fileProvider.Watch(relativePath));
var viewImportsPaths = ViewHierarchyUtility.GetViewImportsLocations(relativePath);
foreach (var location in viewImportsPaths)
{
options.AddExpirationToken(_fileProvider.Watch(location));
}
return options;
}
public void SetOverwritesAndInvokesCallbacks()
{
var cache = CreateCache();
var value1 = new object();
string key = "myKey";
var callback1Invoked = new ManualResetEvent(false);
var callback2Invoked = new ManualResetEvent(false);
var options1 = new MemoryCacheEntryOptions();
options1.PostEvictionCallbacks.Add(new PostEvictionCallbackRegistration()
{
EvictionCallback = (subkey, subValue, reason, state) =>
{
Assert.Equal(key, subkey);
Assert.Same(subValue, value1);
Assert.Equal(EvictionReason.Replaced, reason);
var localCallbackInvoked = (ManualResetEvent)state;
localCallbackInvoked.Set();
},
State = callback1Invoked
});
var result = cache.Set(key, value1, options1);
Assert.Same(value1, result);
var value2 = new object();
var options2 = new MemoryCacheEntryOptions();
options2.PostEvictionCallbacks.Add(new PostEvictionCallbackRegistration()
{
EvictionCallback = (subkey, subValue, reason, state) =>
{
// Shouldn't be invoked.
var localCallbackInvoked = (ManualResetEvent)state;
localCallbackInvoked.Set();
},
State = callback2Invoked
});
result = cache.Set(key, value2, options2);
Assert.Same(value2, result);
Assert.True(callback1Invoked.WaitOne(TimeSpan.FromSeconds(30)), "Callback1");
Assert.False(callback2Invoked.WaitOne(TimeSpan.FromSeconds(30)), "Callback2");
result = cache.Get(key);
Assert.Same(value2, result);
Assert.False(callback2Invoked.WaitOne(TimeSpan.FromSeconds(30)), "Callback2");
}
public Task<int> GetTypesHashAsync()
{
// The serial number is store in local cache in order to prevent
// loading the record if it's not necessary
int serial;
if (!_memoryCache.TryGetValue(TypeHashCacheKey, out serial))
{
var options = new MemoryCacheEntryOptions()
.AddExpirationToken(_signal.GetToken(TypeHashCacheKey));
serial = GetContentDefinitionRecord().Serial;
_memoryCache.Set(TypeHashCacheKey, serial, options);
}
return Task.FromResult(serial);
}
private ViewLocationCacheResult OnCacheMiss(
ViewLocationExpanderContext expanderContext,
ViewLocationCacheKey cacheKey)
{
// Only use the area view location formats if we have an area token.
IEnumerable<string> viewLocations = !string.IsNullOrEmpty(expanderContext.AreaName) ?
_options.AreaViewLocationFormats :
_options.ViewLocationFormats;
for (var i = 0; i < _options.ViewLocationExpanders.Count; i++)
{
viewLocations = _options.ViewLocationExpanders[i].ExpandViewLocations(expanderContext, viewLocations);
}
ViewLocationCacheResult cacheResult = null;
var searchedLocations = new List<string>();
var expirationTokens = new HashSet<IChangeToken>();
foreach (var location in viewLocations)
{
var path = string.Format(
CultureInfo.InvariantCulture,
location,
expanderContext.ViewName,
expanderContext.ControllerName,
expanderContext.AreaName);
cacheResult = CreateCacheResult(expirationTokens, path, expanderContext.IsMainPage);
if (cacheResult != null)
{
break;
}
searchedLocations.Add(path);
}
// No views were found at the specified location. Create a not found result.
if (cacheResult == null)
{
cacheResult = new ViewLocationCacheResult(searchedLocations);
}
var cacheEntryOptions = new MemoryCacheEntryOptions();
cacheEntryOptions.SetSlidingExpiration(_cacheExpirationDuration);
foreach (var expirationToken in expirationTokens)
{
cacheEntryOptions.AddExpirationToken(expirationToken);
}
return ViewLookupCache.Set<ViewLocationCacheResult>(cacheKey, cacheResult, cacheEntryOptions);
}
private ViewLocationCacheResult LocatePageFromPath(string executingFilePath, string pagePath, bool isMainPage)
{
var applicationRelativePath = GetAbsolutePath(executingFilePath, pagePath);
var cacheKey = new ViewLocationCacheKey(applicationRelativePath, isMainPage);
ViewLocationCacheResult cacheResult;
if (!ViewLookupCache.TryGetValue(cacheKey, out cacheResult))
{
var expirationTokens = new HashSet<IChangeToken>();
cacheResult = CreateCacheResult(expirationTokens, applicationRelativePath, isMainPage);
var cacheEntryOptions = new MemoryCacheEntryOptions();
cacheEntryOptions.SetSlidingExpiration(_cacheExpirationDuration);
foreach (var expirationToken in expirationTokens)
{
cacheEntryOptions.AddExpirationToken(expirationToken);
}
// No views were found at the specified location. Create a not found result.
if (cacheResult == null)
{
cacheResult = new ViewLocationCacheResult(new[] { applicationRelativePath });
}
cacheResult = ViewLookupCache.Set<ViewLocationCacheResult>(
cacheKey,
cacheResult,
cacheEntryOptions);
}
return cacheResult;
}
public static TItem Set <TItem>(this IMemoryCache cache, object key, TItem value, MemoryCacheEntryOptions options, CacheTags tags)
{
UpdateTagsDictionaryWithLock(key, tags);
options.PostEvictionCallbacks.Add(PostEvictionCallbackRegistration);
return(cache.Set(key, value, options));
}
public void Main()
{
_cacheEntryOptions = GetCacheEntryOptions();
IMemoryCache cache = new MemoryCache(new MemoryCacheOptions());
SetKey(cache, "0");
PriodicallyReadKey(cache, TimeSpan.FromSeconds(1));
PeriodciallyRemoveKey(cache, TimeSpan.FromSeconds(11));
PeriodciallySetKey(cache, TimeSpan.FromSeconds(13));
Console.ReadLine();
Console.WriteLine("Shutting down");
}
