Add sliding expiration support to EFCoreSecondLevelCacheInterceptor.StackExchange.Redis, Close #297

Author: VahidN

Directory.Build.props

@@ -1,6 +1,6 @@
 <Project>
     <PropertyGroup>
-        <VersionPrefix>5.2.3</VersionPrefix>
+        <VersionPrefix>5.2.4</VersionPrefix>
         <LangVersion>latest</LangVersion>
         <ManagePackageVersionsCentrally>true</ManagePackageVersionsCentrally>
         <AccelerateBuildsInVisualStudio>true</AccelerateBuildsInVisualStudio>

src/EFCoreSecondLevelCacheInterceptor.StackExchange.Redis/EFStackExchangeRedisCacheProvider.cs

@@ -1,5 +1,3 @@
-using System;
-using System.Collections.Generic;
 using Microsoft.Extensions.Options;
 using StackExchange.Redis;
 
@@ -80,7 +78,14 @@ public void ClearAllCachedEntries()
         var redisDb = RedisConnection.GetDatabase();
         var maybeValue = redisDb.StringGet(cacheKey.KeyHash);
 
-        return maybeValue.HasValue ? dataSerializer.Deserialize<EFCachedData>(maybeValue) : null;
+        if (!maybeValue.HasValue)
+        {
+            return null;
+        }
+
+        ManageSlidingExpiration(cacheKey, cachePolicy, redisDb);
+
+        return dataSerializer.Deserialize<EFCachedData>(maybeValue);
     }
 
     /// <inheritdoc />
@@ -116,6 +121,14 @@ public void InvalidateCacheDependencies(EFCacheKey cacheKey)
         }
     }
 
+    private static void ManageSlidingExpiration(EFCacheKey cacheKey, EFCachePolicy cachePolicy, IDatabase redisDb)
+    {
+        if (cachePolicy.CacheExpirationMode == CacheExpirationMode.Sliding && cachePolicy.CacheTimeout != TimeSpan.Zero)
+        {
+            redisDb.KeyExpire(cacheKey.KeyHash, cachePolicy.CacheTimeout, CommandFlags.FireAndForget);
+        }
+    }
+
     private ConnectionMultiplexer GetRedisConnection()
     {
         var options = cacheSettings.Value.AdditionalData as EFRedisCacheConfigurationOptions ??