Added a one hour debounce of reporting the same errors to sentry

src/NzbDrone.Common/Instrumentation/Sentry/SentryDebounce.cs

@@ -0,0 +1,32 @@
+using System;
+using System.Collections.Generic;
+
+namespace NzbDrone.Common.Instrumentation.Sentry
+{
+    public class SentryDebounce
+    {
+        private readonly Dictionary<string, DateTime> _dictionary;
+        private static readonly TimeSpan TTL = TimeSpan.FromHours(1);
+
+        public SentryDebounce()
+        {
+            _dictionary = new Dictionary<string, DateTime>();
+        }
+
+        public bool Allowed(IEnumerable<string> fingerPrint)
+        {
+            var key = string.Join("|", fingerPrint);
+
+            DateTime expiry;
+            _dictionary.TryGetValue(key, out expiry);
+
+            if (expiry >= DateTime.Now)
+            {
+                return false;
+            }
+
+            _dictionary[key] = DateTime.Now + TTL;
+            return true;
+        }
+    }
+}

src/NzbDrone.Common/Instrumentation/Sentry/SentryTarget.cs

@@ -1,6 +1,5 @@
 using System;
 using System.Collections.Generic;
-using System.Diagnostics;
 using System.Linq;
 using System.Threading;
 using NLog;
@@ -12,7 +11,6 @@ using SharpRaven.Data;
 
 namespace NzbDrone.Common.Instrumentation.Sentry
 {
-
     public class SentryUserFactory : ISentryUserFactory
     {
         public SentryUser Create()
@@ -21,6 +19,7 @@ namespace NzbDrone.Common.Instrumentation.Sentry
         }
     }
 
+
     [Target("Sentry")]
     public class SentryTarget : TargetWithLayout
     {
@@ -39,6 +38,8 @@ namespace NzbDrone.Common.Instrumentation.Sentry
             {LogLevel.Warn, ErrorLevel.Warning},
         };
 
+        private readonly SentryDebounce _debounce;
+
         public SentryTarget(string dsn)
         {
             _client = new RavenClient(new Dsn(dsn), new JsonPacketFactory(), new SentryRequestFactory(), new SentryUserFactory())
@@ -53,6 +54,8 @@ namespace NzbDrone.Common.Instrumentation.Sentry
             _client.Tags.Add("culture", Thread.CurrentThread.CurrentCulture.Name);
             _client.Tags.Add("branch", BuildInfo.Branch);
             _client.Tags.Add("version", BuildInfo.Version.ToString());
+
+            _debounce = new SentryDebounce();
         }
 
 
@@ -94,6 +97,12 @@ namespace NzbDrone.Common.Instrumentation.Sentry
                     return;
                 }
 
+                var fingerPrint = GetFingerPrint(logEvent);
+                if (!_debounce.Allowed(fingerPrint))
+                {
+                    return;
+                }
+
                 var extras = logEvent.Properties.ToDictionary(x => x.Key.ToString(), x => x.Value.ToString());
                 _client.Logger = logEvent.LoggerName;
 
@@ -105,7 +114,7 @@ namespace NzbDrone.Common.Instrumentation.Sentry
                     Extra = extras
                 };
 
-                var fingerPrint = GetFingerPrint(logEvent);
+
                 fingerPrint.ForEach(c => sentryEvent.Fingerprint.Add(c));
 
                 sentryEvent.Tags.Add("os_name", Environment.GetEnvironmentVariable("OS_NAME"));

src/NzbDrone.Common/NzbDrone.Common.csproj

@@ -183,6 +183,7 @@
     <Compile Include="Instrumentation\NzbDroneFileTarget.cs" />
     <Compile Include="Instrumentation\NzbDroneLogger.cs" />
     <Compile Include="Instrumentation\Sentry\PopulateStackTraceRenderer.cs" />
+    <Compile Include="Instrumentation\Sentry\SentryDebounce.cs" />
     <Compile Include="Instrumentation\Sentry\SentryTarget.cs" />
     <Compile Include="Instrumentation\VersionLayoutRenderer.cs" />
     <Compile Include="Extensions\LevenstheinExtensions.cs" />