use [LoggerMessage] for logging

Author: mgravell

src/Caching/StackExchangeRedis/src/RedisOutputCacheStore.cs

@@ -114,17 +114,23 @@ private async Task RunGarbageCollectionLoopAsync()
                 catch (Exception ex)
                 {
                     // this sweep failed; log it
-                    _logger.LogWarning(ex, "Transient error occurred executing redis output-cache GC loop");
+                    RedisOutputCacheGCTransientFault(_logger, ex);
                 }
             }
         }
         catch (Exception ex)
         {
             // the entire loop is dead
-            _logger.LogError(ex, "Fatal error occurred executing redis output-cache GC loop");
+            RedisOutputCacheGCFatalError(_logger, ex);
         }
     }
 
+    [LoggerMessage(1, LogLevel.Warning, "Transient error occurred executing redis output-cache GC loop.", EventName = "RedisOutputCacheGCTransientError")]
+    internal static partial void RedisOutputCacheGCTransientFault(ILogger logger, Exception exception);
+
+    [LoggerMessage(2, LogLevel.Error, "Fatal error occurred executing redis output-cache GC loop.", EventName = "RedisOutputCacheGCFatalError")]
+    internal static partial void RedisOutputCacheGCFatalError(ILogger logger, Exception exception);
+
     internal async ValueTask<long?> ExecuteGarbageCollectionAsync(long keepValuesGreaterThan, CancellationToken cancellationToken = default)
     {
         var cache = await ConnectAsync(CancellationToken.None).ConfigureAwait(false);