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"content": "# Summary of the issue\n\n\n\n## Environment\n\n```\n.NET Core SDK version: \nMicrosoft.EntityFrameworkCore version: \nEFSecondLevelCache.Core version: \n```\n\n## Example code/Steps to reproduce:\n\n```\npaste your core code\n```\n\n## Output:\n\n```\nException message:\nFull Stack trace:\n```\n\n"
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"path": "LICENSE.md",
"content": "Apache License\n Version 2.0, January 2004\n http://www.apache.org/licenses/\n\n TERMS AND CONDITIONS FOR USE, REPRODUCTION, AND DISTRIBUTION\n\n 1. Definitions.\n\n \"License\" shall mean the terms and conditions for use, reproduction,\n and distribution as defined by Sections 1 through 9 of this document.\n\n \"Licensor\" shall mean the copyright owner or entity authorized by\n the copyright owner that is granting the License.\n\n \"Legal Entity\" shall mean the union of the acting entity and all\n other entities that control, are controlled by, or are under common\n control with that entity. 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},
{
"path": "README.md",
"content": "# [Announcing a better Second Level Caching Library!](https://github.com/VahidN/EFSecondLevelCache.Core/issues/67)\r\n\r\n# EFSecondLevelCache.Core\r\n\r\n
\r\n\r\nEntity Framework Core Second Level Caching Library.\r\n\r\nSecond level caching is a query cache. The results of EF commands will be stored in the cache, so that the same EF commands will retrieve their data from the cache rather than executing them against the database again.\r\n\r\n## Install via NuGet\r\n\r\nTo install EFSecondLevelCache.Core, run the following command in the Package Manager Console:\r\n\r\n[](https://github.com/VahidN/EFSecondLevelCache.Core)\r\n\r\n```\r\nPM> Install-Package EFSecondLevelCache.Core\r\n```\r\n\r\nYou can also view the [package page](http://www.nuget.org/packages/EFSecondLevelCache.Core/) on NuGet.\r\n\r\nThis library also uses the [CacheManager.Core](https://github.com/MichaCo/CacheManager), as a highly configurable cache manager.\r\nTo use its in-memory caching mechanism, add these entries to the `.csproj` file:\r\n\r\n```xml\r\n \r\n \r\n \r\n \r\n \r\n \r\n```\r\n\r\nAnd to get the latest versions of these libraries you can run the following command in the Package Manager Console:\r\n\r\n```\r\nPM> Update-Package\r\n```\r\n\r\n## Usage\r\n\r\n1- [Register the required services](/src/Tests/EFSecondLevelCache.Core.AspNetCoreSample/Startup.cs) of `EFSecondLevelCache.Core` and also `CacheManager.Core`\r\n\r\n```csharp\r\nnamespace EFSecondLevelCache.Core.AspNetCoreSample\r\n{\r\n public class Startup\r\n {\r\n public void ConfigureServices(IServiceCollection services)\r\n {\r\n services.AddEFSecondLevelCache();\r\n\r\n // Add an in-memory cache service provider\r\n services.AddSingleton(typeof(ICacheManager<>), typeof(BaseCacheManager<>));\r\n services.AddSingleton(typeof(ICacheManagerConfiguration),\r\n new CacheManager.Core.ConfigurationBuilder()\r\n .WithJsonSerializer()\r\n .WithMicrosoftMemoryCacheHandle(instanceName: \"MemoryCache1\")\r\n .WithExpiration(ExpirationMode.Absolute, TimeSpan.FromMinutes(10))\r\n .Build());\r\n }\r\n }\r\n}\r\n```\r\n\r\nIf you want to use the Redis as the preferred cache provider, first install the `CacheManager.StackExchange.Redis` package and then register its required services:\r\n\r\n```csharp\r\n// Add Redis cache service provider\r\nvar jss = new JsonSerializerSettings\r\n{\r\n NullValueHandling = NullValueHandling.Ignore,\r\n ReferenceLoopHandling = ReferenceLoopHandling.Ignore\r\n};\r\n\r\nconst string redisConfigurationKey = \"redis\";\r\nservices.AddSingleton(typeof(ICacheManagerConfiguration),\r\n new CacheManager.Core.ConfigurationBuilder()\r\n .WithJsonSerializer(serializationSettings: jss, deserializationSettings: jss)\r\n .WithUpdateMode(CacheUpdateMode.Up)\r\n .WithRedisConfiguration(redisConfigurationKey, config =>\r\n {\r\n config.WithAllowAdmin()\r\n .WithDatabase(0)\r\n .WithEndpoint(\"localhost\", 6379)\r\n // Enables keyspace notifications to react on eviction/expiration of items.\r\n // Make sure that all servers are configured correctly and 'notify-keyspace-events' is at least set to 'Exe', otherwise CacheManager will not retrieve any events.\r\n // See https://redis.io/topics/notifications#configuration for configuration details.\r\n .EnableKeyspaceEvents();\r\n })\r\n .WithMaxRetries(100)\r\n .WithRetryTimeout(50)\r\n .WithRedisCacheHandle(redisConfigurationKey)\r\n .WithExpiration(ExpirationMode.Absolute, TimeSpan.FromMinutes(10))\r\n .Build());\r\nservices.AddSingleton(typeof(ICacheManager<>), typeof(BaseCacheManager<>));\r\n```\r\n\r\n2- [Setting up the cache invalidation](/src/Tests/EFSecondLevelCache.Core.AspNetCoreSample/DataLayer/SampleContext.cs) by overriding the SaveChanges method to prevent stale reads:\r\n\r\n```csharp\r\nnamespace EFSecondLevelCache.Core.AspNetCoreSample.DataLayer\r\n{\r\n public class SampleContext : DbContext\r\n {\r\n public SampleContext(DbContextOptions options) : base(options)\r\n { }\r\n\r\n public virtual DbSet Posts { get; set; }\r\n\r\n public override int SaveChanges()\r\n {\r\n var changedEntityNames = this.GetChangedEntityNames();\r\n\r\n this.ChangeTracker.AutoDetectChangesEnabled = false; // for performance reasons, to avoid calling DetectChanges() again.\r\n var result = base.SaveChanges();\r\n this.ChangeTracker.AutoDetectChangesEnabled = true;\r\n\r\n this.GetService().InvalidateCacheDependencies(changedEntityNames);\r\n\r\n return result;\r\n }\r\n }\r\n}\r\n```\r\n\r\n3- Then to cache the results of the normal queries like:\r\n\r\n```csharp\r\nvar products = context.Products.Include(x => x.Tags).FirstOrDefault();\r\n```\r\n\r\nWe can use the new `Cacheable()` extension method:\r\n\r\n```csharp\r\n// If you don't specify the `EFCachePolicy`, the global `new CacheManager.Core.ConfigurationBuilder().WithExpiration()` setting will be used automatically.\r\nvar products = context.Products.Include(x => x.Tags).Cacheable().FirstOrDefault(); // Async methods are supported too.\r\n\r\n// Or you can specify the `EFCachePolicy` explicitly to override the global settings.\r\nvar post1 = context.Posts\r\n .Where(x => x.Id > 0)\r\n .OrderBy(x => x.Id)\r\n .Cacheable(CacheExpirationMode.Sliding, TimeSpan.FromMinutes(5))\r\n .FirstOrDefault();\r\n\r\n// NOTE: It's better to add the `Cacheable()` method before the materialization methods such as `ToList()` or `FirstOrDefault()` to cover the whole expression tree.\r\n```\r\n\r\nAlso AutoMapper's `ProjectTo()` method is supported:\r\n\r\n```csharp\r\nvar posts = context.Posts\r\n .Where(x => x.Id > 0)\r\n .OrderBy(x => x.Id)\r\n .Cacheable()\r\n .ProjectTo(configuration: _mapper.ConfigurationProvider)\r\n .ToList();\r\n```\r\n\r\n## Guidance\r\n\r\n### When to use\r\n\r\nGood candidates for query caching are global site settings and public data, such as infrequently changing articles or comments. It can also be beneficial to cache data specific to a user so long as the cache expires frequently enough relative to the size of the user base that memory consumption remains acceptable. Small, per-user data that frequently exceeds the cache's lifetime, such as a user's photo path, is better held in user claims, which are stored in cookies, than in this cache.\r\n\r\n### Scope\r\n\r\nThis cache is scoped to the application, not the current user. It does not use session variables. Accordingly, when retriveing cached per-user data, be sure queries in include code such as `.Where(x => .... && x.UserId == id)`.\r\n\r\n### Invalidation\r\n\r\nThis cache is updated when an entity is changed (insert, update, or delete) via a DbContext that uses this library. If the database is updated through some other means, such as a stored procedure or trigger, the cache becomes stale.\r\n"
},
{
"path": "global.json",
"content": "{\n \"sdk\": {\n \"version\": \"3.1.101\"\n }\n}"
},
{
"path": "src/EFSecondLevelCache.Core/Contracts/EFCacheDebugInfo.cs",
"content": "namespace EFSecondLevelCache.Core.Contracts\n{\n /// \n /// Stores the debug information of the caching process.\n /// \n public class EFCacheDebugInfo\n {\n /// \n /// Stores information of the computed key of the input LINQ query.\n /// \n public EFCacheKey EFCacheKey { set; get; }\n\n /// \n /// Determines this query is using the 2nd level cache or not.\n /// \n public bool IsCacheHit { set; get; }\n }\n}"
},
{
"path": "src/EFSecondLevelCache.Core/Contracts/EFCacheKey.cs",
"content": "using System.Collections.Generic;\n\nnamespace EFSecondLevelCache.Core.Contracts\n{\n /// \n /// Stores information of the computed key of the input LINQ query.\n /// \n public class EFCacheKey\n {\n /// \n /// The computed key of the input LINQ query.\n /// \n public string Key { set; get; }\n\n /// \n /// Hash of the input LINQ query's computed key.\n /// \n public string KeyHash { set; get; }\n\n /// \n /// Determines which entities are used in this LINQ query.\n /// This array will be used to invalidate the related cache of all related queries automatically.\n /// \n public ISet CacheDependencies { set; get; }\n\n /// \n /// Stores information of the computed key of the input LINQ query.\n /// \n public EFCacheKey()\n {\n CacheDependencies = new HashSet();\n }\n\n /// \n /// Equals\n /// \n /// \n /// \n public override bool Equals(object obj)\n {\n var efCacheKey = obj as EFCacheKey;\n if (efCacheKey == null)\n return false;\n\n return this.KeyHash == efCacheKey.KeyHash;\n }\n\n /// \n /// GetHashCode\n /// \n /// \n public override int GetHashCode()\n {\n unchecked\n {\n var hash = 17;\n hash = hash * 23 + KeyHash.GetHashCode();\n return hash;\n }\n }\n }\n}"
},
{
"path": "src/EFSecondLevelCache.Core/Contracts/EFQueryDebugView.cs",
"content": "using System.Collections.Generic;\n\nnamespace EFSecondLevelCache.Core.Contracts\n{\n /// \n /// Expression and its Dependencies\n /// \n public class EFQueryDebugView\n {\n /// \n /// Dependency items.\n /// \n public ISet Types { set; get; }\n\n /// \n /// Expression to a readable string.\n /// \n public string DebugView { set; get; }\n }\n}"
},
{
"path": "src/EFSecondLevelCache.Core/Contracts/IEFCacheKeyHashProvider.cs",
"content": "namespace EFSecondLevelCache.Core.Contracts\n{\n /// \n /// The CacheKey Hash Provider Contract.\n /// \n public interface IEFCacheKeyHashProvider\n {\n /// \n /// Computes the unique hash of the input.\n /// \n /// the input data to hash\n /// Hashed data\n string ComputeHash(string data);\n }\n}"
},
{
"path": "src/EFSecondLevelCache.Core/Contracts/IEFCacheKeyProvider.cs",
"content": "using System.Linq;\nusing System.Linq.Expressions;\n\nnamespace EFSecondLevelCache.Core.Contracts\n{\n /// \n /// CacheKeyProvider Contract.\n /// \n public interface IEFCacheKeyProvider\n {\n /// \n /// Gets an EF query and returns its hash to store in the cache.\n /// \n /// The EF query.\n /// An expression tree that represents a LINQ query.\n /// If you think the computed hash of the query is not enough, set this value.\n /// Information of the computed key of the input LINQ query.\n EFCacheKey GetEFCacheKey(IQueryable query, Expression expression, string saltKey = \"\");\n }\n}"
},
{
"path": "src/EFSecondLevelCache.Core/Contracts/IEFCacheServiceProvider.cs",
"content": "using System.Collections.Generic;\n\nnamespace EFSecondLevelCache.Core.Contracts\n{\n /// \n /// Cache Service Provider Contract.\n /// \n public interface IEFCacheServiceProvider\n {\n /// \n /// Removes the cached entries added by this library.\n /// \n void ClearAllCachedEntries();\n\n /// \n /// Gets a cached entry by key.\n /// \n /// key to find\n /// cached value\n object GetValue(string cacheKey);\n\n /// \n /// Adds a new item to the cache.\n /// \n /// key\n /// value\n /// cache dependencies\n /// Defines the expiration mode of the cache item. If you set it to null, the global `new CacheManager.Core.ConfigurationBuilder().WithExpiration()` setting will be used automatically.\n void InsertValue(string cacheKey, object value, ISet rootCacheKeys, EFCachePolicy cachePolicy);\n\n /// \n /// Invalidates all of the cache entries which are dependent on any of the specified root keys.\n /// \n /// cache dependencies\n void InvalidateCacheDependencies(string[] rootCacheKeys);\n\n /// \n /// Some cache providers won't accept null values.\n /// So we need a custom Null object here. It should be defined `static readonly` in your code.\n /// \n object NullObject { get; }\n }\n}"
},
{
"path": "src/EFSecondLevelCache.Core/EFAsyncEnumerable.cs",
"content": "using System.Collections.Generic;\nusing System.Threading;\n\nnamespace EFSecondLevelCache.Core\n{\n /// \n /// Asynchronous version of the IEnumerable interface, allowing elements of the enumerable sequence to be retrieved asynchronously.\n /// \n public class EFAsyncEnumerable : IAsyncEnumerable\n {\n private readonly IEnumerator _inner;\n\n /// \n /// Asynchronous version of the IEnumerable interface\n /// \n public EFAsyncEnumerable(IEnumerator inner)\n {\n _inner = inner;\n }\n\n /// \n /// Gets an asynchronous enumerator over the sequence.\n /// \n public IAsyncEnumerator GetEnumerator()\n {\n return new EFAsyncEnumerator(_inner);\n }\n\n /// \n /// Gets an asynchronous enumerator over the sequence.\n /// \n public IAsyncEnumerator GetAsyncEnumerator(CancellationToken cancellationToken = new CancellationToken())\n {\n return new EFAsyncEnumerator(_inner);\n }\n }\n}"
},
{
"path": "src/EFSecondLevelCache.Core/EFAsyncEnumerator.cs",
"content": "using System.Collections.Generic;\nusing System.Threading;\nusing System.Threading.Tasks;\n\nnamespace EFSecondLevelCache.Core\n{\n /// \n /// Asynchronous version of the IEnumerator of T interface that allows elements to be retrieved asynchronously.\n /// \n /// \n public class EFAsyncEnumerator : IAsyncEnumerator\n {\n private readonly IEnumerator _inner;\n\n /// \n /// Asynchronous version of the IEnumerator of T interface that allows elements to be retrieved asynchronously.\n /// \n /// The inner IEnumerator\n public EFAsyncEnumerator(IEnumerator inner)\n {\n _inner = inner;\n }\n\n /// \n /// Gets the current element in the iteration.\n /// \n public T Current => _inner.Current;\n\n /// \n /// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.\n /// \n public void Dispose()\n {\n _inner.Dispose();\n }\n\n /// \n /// Advances the enumerator to the next element in the sequence, returning the result asynchronously.\n /// \n /// A System.Threading.CancellationToken to observe while waiting for the task to complete.\n /// A task that represents the asynchronous operation. The task result contains true if the enumerator was successfully advanced to the next element; false if the enumerator has passed the end of the sequence.\n public Task MoveNext(CancellationToken cancellationToken)\n {\n cancellationToken.ThrowIfCancellationRequested();\n return Task.FromResult(_inner.MoveNext());\n }\n\n /// \n /// Advances the enumerator to the next element in the sequence, returning the result asynchronously.\n /// \n /// A task that represents the asynchronous operation. The task result contains true if the enumerator was successfully advanced to the next element; false if the enumerator has passed the end of the sequence.\n public ValueTask MoveNextAsync()\n {\n return new ValueTask(_inner.MoveNext());\n }\n\n /// \n /// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.\n /// \n public ValueTask DisposeAsync()\n {\n _inner.Dispose();\n return default;\n }\n }\n}"
},
{
"path": "src/EFSecondLevelCache.Core/EFAsyncTaskEnumerable.cs",
"content": "using System.Collections.Generic;\nusing System.Threading;\nusing System.Threading.Tasks;\n\nnamespace EFSecondLevelCache.Core\n{\n /// \n /// Asynchronous version of the IEnumerable interface, allowing elements of the enumerable sequence to be retrieved asynchronously.\n /// \n public class EFAsyncTaskEnumerable : IAsyncEnumerable\n {\n private readonly Task _task;\n\n /// \n /// Asynchronous version of the IEnumerable interface.\n /// \n public EFAsyncTaskEnumerable(Task task)\n {\n _task = task;\n }\n\n /// \n /// Gets an asynchronous enumerator over the sequence.\n /// \n public IAsyncEnumerator GetEnumerator() => new EFAsyncTaskEnumerator(_task);\n\n /// \n /// Gets an asynchronous enumerator over the sequence.\n /// \n public IAsyncEnumerator GetAsyncEnumerator(CancellationToken cancellationToken = new CancellationToken())\n {\n return new EFAsyncTaskEnumerator(_task);\n }\n }\n}"
},
{
"path": "src/EFSecondLevelCache.Core/EFAsyncTaskEnumerator.cs",
"content": "using System;\nusing System.Collections.Generic;\nusing System.Threading;\nusing System.Threading.Tasks;\n\nnamespace EFSecondLevelCache.Core\n{\n /// \n /// Asynchronous version of the IEnumerator interface, allowing elements to be retrieved asynchronously.\n /// \n public sealed class EFAsyncTaskEnumerator : IAsyncEnumerator\n {\n private readonly Task _task;\n private bool _moved;\n\n /// \n /// Asynchronous version of the IEnumerator interface\n /// \n public EFAsyncTaskEnumerator(Task task)\n {\n _task = task;\n }\n\n /// \n /// Gets the current element in the iteration.\n /// \n public T Current => !_moved ? default(T) : _task.Result;\n\n /// \n /// Advances the enumerator to the next element in the sequence, returning the result asynchronously.\n /// \n public async Task MoveNext(CancellationToken cancellationToken)\n {\n cancellationToken.ThrowIfCancellationRequested();\n\n if (!_moved)\n {\n await _task.ConfigureAwait(false);\n\n _moved = true;\n\n return _moved;\n }\n\n return false;\n }\n\n /// \n /// Advances the enumerator to the next element in the sequence, returning the result asynchronously.\n /// \n public ValueTask MoveNextAsync()\n {\n return new ValueTask(MoveNext(new CancellationToken()));\n }\n\n /// \n /// Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.\n /// \n public ValueTask DisposeAsync()\n {\n return default;\n }\n }\n}"
},
{
"path": "src/EFSecondLevelCache.Core/EFCacheKeyHashProvider.cs",
"content": "using System;\nusing EFSecondLevelCache.Core.Contracts;\n\nnamespace EFSecondLevelCache.Core\n{\n /// \n /// Computes the unique hash of the input, using the xxHash algorithm.\n /// \n public class EFCacheKeyHashProvider : IEFCacheKeyHashProvider\n {\n /// \n /// Computes the unique hash of the input.\n /// \n /// the input data to hash\n /// Hashed data using the xxHash algorithm\n public string ComputeHash(string data)\n {\n if(string.IsNullOrWhiteSpace(data))\n throw new ArgumentNullException(nameof(data));\n\n return $\"{XxHashUnsafe.ComputeHash(data):X}\";\n }\n }\n}"
},
{
"path": "src/EFSecondLevelCache.Core/EFCacheKeyProvider3x.cs",
"content": "using System.Linq;\nusing System.Linq.Expressions;\nusing EFSecondLevelCache.Core.Contracts;\nusing System;\nusing CacheManager.Core;\nusing Microsoft.Extensions.DependencyInjection;\nusing System.Reflection;\nusing Microsoft.EntityFrameworkCore.Query;\nusing Microsoft.EntityFrameworkCore.Query.Internal;\nusing Microsoft.EntityFrameworkCore.Diagnostics;\nusing Microsoft.EntityFrameworkCore;\n\nnamespace EFSecondLevelCache.Core\n{\n /// \n /// A custom cache key provider for EF queries.\n /// \n public class EFCacheKeyProvider : IEFCacheKeyProvider\n {\n private static readonly TypeInfo _queryCompilerTypeInfo = typeof(QueryCompiler).GetTypeInfo();\n\n private static readonly FieldInfo _queryCompilerField =\n typeof(EntityQueryProvider).GetTypeInfo().DeclaredFields.First(x => x.Name == \"_queryCompiler\");\n\n private static readonly FieldInfo _queryContextFactoryField =\n _queryCompilerTypeInfo.DeclaredFields.First(x => x.Name == \"_queryContextFactory\");\n\n private static readonly FieldInfo _loggerField =\n _queryCompilerTypeInfo.DeclaredFields.First(x => x.Name == \"_logger\");\n\n private static readonly TimeSpan _slidingExpirationTimeSpan = TimeSpan.FromMinutes(7);\n\n private static readonly ICacheManager _keysCacheManager =\n EFStaticServiceProvider.Instance.GetRequiredService>();\n\n private readonly IEFCacheKeyHashProvider _cacheKeyHashProvider;\n\n /// \n /// A custom cache key provider for EF queries.\n /// \n /// Provides the custom hashing algorithm.\n public EFCacheKeyProvider(IEFCacheKeyHashProvider cacheKeyHashProvider)\n {\n _cacheKeyHashProvider = cacheKeyHashProvider;\n }\n\n /// \n /// Gets an EF query and returns its hashed key to store in the cache.\n /// \n /// The EF query.\n /// An expression tree that represents a LINQ query.\n /// If you think the computed hash of the query is not enough, set this value.\n /// Information of the computed key of the input LINQ query.\n public EFCacheKey GetEFCacheKey(IQueryable query, Expression expression, string saltKey = \"\")\n {\n var queryCompiler = (QueryCompiler)_queryCompilerField.GetValue(query.Provider);\n var (expressionKeyHash, modifiedExpression) = getExpressionKeyHash(queryCompiler, _cacheKeyHashProvider, expression);\n var cachedKey = _keysCacheManager.Get(expressionKeyHash);\n if (cachedKey != null)\n {\n return cachedKey;\n }\n\n var expressionPrinter = new ExpressionPrinter();\n var sql = expressionPrinter.PrintDebug(modifiedExpression);\n\n var expressionVisitorResult = EFQueryExpressionVisitor.GetDebugView(expression);\n var key = $\"{sql};{expressionVisitorResult.DebugView};{saltKey}\";\n var keyHash = _cacheKeyHashProvider.ComputeHash(key);\n\n var cacheKey = new EFCacheKey\n {\n Key = key,\n KeyHash = keyHash,\n CacheDependencies = expressionVisitorResult.Types\n };\n setCache(expressionKeyHash, cacheKey);\n return cacheKey;\n }\n\n private static void setCache(string expressionKeyHash, EFCacheKey value)\n {\n _keysCacheManager.Add(\n new CacheItem(expressionKeyHash, value, ExpirationMode.Sliding, _slidingExpirationTimeSpan));\n }\n\n private static (string ExpressionKeyHash, Expression ModifiedExpression) getExpressionKeyHash(\n QueryCompiler queryCompiler,\n IEFCacheKeyHashProvider cacheKeyHashProvider,\n Expression expression)\n {\n var queryContextFactory = (IQueryContextFactory)_queryContextFactoryField.GetValue(queryCompiler);\n var queryContext = queryContextFactory.Create();\n var logger = (IDiagnosticsLogger)_loggerField.GetValue(queryCompiler);\n expression = queryCompiler.ExtractParameters(expression, queryContext, logger, parameterize: false);\n\n var expressionKey = $\"{ExpressionEqualityComparer.Instance.GetHashCode(expression)};\";\n var parameterValues = queryContext.ParameterValues;\n if (parameterValues.Any())\n {\n expressionKey = parameterValues.Aggregate(expressionKey,\n (current, item) => current + $\"{item.Key}={item.Value?.GetHashCode()};\");\n }\n\n return (cacheKeyHashProvider.ComputeHash(expressionKey), expression);\n }\n }\n}"
},
{
"path": "src/EFSecondLevelCache.Core/EFCachePolicy.cs",
"content": "using System;\n\nnamespace EFSecondLevelCache.Core\n{\n /// \n /// Defines the supported expiration modes for cache items.\n /// \n public enum CacheExpirationMode\n {\n /// \n /// Defines absolute expiration. The item will expire after the expiration timeout.\n /// \n Absolute,\n\n /// \n /// Defines sliding expiration. The expiration timeout will be refreshed on every access.\n /// \n Sliding\n }\n\n /// \n /// EFCachePolicy determines the Expiration time of the cache.\n /// If you don't define it, the global `new CacheManager.Core.ConfigurationBuilder().WithExpiration()` setting will be used automatically.\n /// \n public class EFCachePolicy\n {\n /// \n /// Defines the expiration mode of the cache item.\n /// Its default value is Absolute.\n /// \n public CacheExpirationMode ExpirationMode { set; get; }\n\n /// \n /// The expiration timeout.\n /// Its default value is 20 minutes later.\n /// \n /// \n public TimeSpan Timeout { set; get; } = TimeSpan.FromMinutes(20);\n\n /// \n /// If you think the computed hash of the query to calculate the cache-key is not enough, set this value.\n /// Its default value is string.Empty.\n /// \n public string SaltKey { set; get; } = string.Empty;\n\n /// \n /// EFCachePolicy determines the Expiration time of the cache.\n /// \n public EFCachePolicy() { }\n\n /// \n /// EFCachePolicy determines the Expiration time of the cache.\n /// \n /// Defines the expiration mode of the cache item.\n /// The expiration timeout.\n public EFCachePolicy(CacheExpirationMode expirationMode, TimeSpan timeout)\n {\n ExpirationMode = expirationMode;\n Timeout = timeout;\n }\n\n /// \n /// EFCachePolicy determines the Expiration time of the cache.\n /// \n /// Defines the expiration mode of the cache item.\n /// The expiration timeout.\n /// If you think the computed hash of the query to calculate the cache-key is not enough, set this value.\n public EFCachePolicy(CacheExpirationMode expirationMode, TimeSpan timeout, string saltKey)\n {\n ExpirationMode = expirationMode;\n Timeout = timeout;\n SaltKey = saltKey;\n }\n }\n}"
},
{
"path": "src/EFSecondLevelCache.Core/EFCacheServiceProvider.cs",
"content": "using System.Collections.Generic;\nusing System.Threading;\nusing Microsoft.Extensions.DependencyInjection;\nusing CacheManager.Core;\nusing EFSecondLevelCache.Core.Contracts;\n\nnamespace EFSecondLevelCache.Core\n{\n /// \n /// Using ICacheManager as a cache service.\n /// \n public class EFCacheServiceProvider : IEFCacheServiceProvider\n {\n private static readonly EFCacheKey _nullObject = new EFCacheKey();\n\n private static readonly ICacheManager> _dependenciesCacheManager =\n EFStaticServiceProvider.Instance.GetRequiredService>>();\n\n private static readonly ICacheManager
![\"GitHub](\"https://github.com/VahidN/EFSecondLevelCache.Core/workflows/.NET%20Core%20Build/badge.svg\"){kind=icon}
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