From 3d8154ca2d31ac543f2df8bd0604e5240b9e13a9 Mon Sep 17 00:00:00 2001
From: =?UTF-8?q?=D0=A4=D1=80=D0=BE=D0=BB=D0=BE=D0=B2?=
 <nikita.grigorevich@gmail.com>
Date: Tue, 23 Nov 2021 16:12:41 +0500
Subject: [PATCH] Fix TelemetryTracker dbContext disposing.

---
 .../Services/TelemetryTracker.cs                   | 14 ++++++++------
 1 file changed, 8 insertions(+), 6 deletions(-)

diff --git a/AsbCloudInfrastructure/Services/TelemetryTracker.cs b/AsbCloudInfrastructure/Services/TelemetryTracker.cs
index fdab89e8..349a0667 100644
--- a/AsbCloudInfrastructure/Services/TelemetryTracker.cs
+++ b/AsbCloudInfrastructure/Services/TelemetryTracker.cs
@@ -44,7 +44,7 @@ namespace AsbCloudInfrastructure.Services
             var options = new DbContextOptionsBuilder<AsbCloudDbContext>()
                 .UseNpgsql(configuration.GetConnectionString("DefaultConnection"))
                 .Options;
-            using var db = new AsbCloudDbContext(options);
+            var db = new AsbCloudDbContext(options);
 
             var cacheTelemetry = cacheDb.GetCachedTable<Telemetry>(db);
             var keyValuePairs = new Dictionary<string, TrackerStat>(cacheTelemetry.Count());
@@ -65,7 +65,7 @@ namespace AsbCloudInfrastructure.Services
 
             Task.Run(async () =>
             {
-                db.Database.SetCommandTimeout(2 * 60);                
+                db.Database.SetCommandTimeout(2 * 60);
                 var dates = await db.TelemetryDataSaub
                     .GroupBy(d => d.IdTelemetry)
                     .Select(g => new
@@ -77,9 +77,7 @@ namespace AsbCloudInfrastructure.Services
                     .AsNoTracking()
                     .ToListAsync()
                     .ConfigureAwait(false);
-                
-                db.Dispose();
-                
+
                 var oldReqs = dates.Select(t => new
                 {
                     Uid = cacheTelemetry.FirstOrDefault(c => c.Id == t.IdTelemetry)?.RemoteUid,
@@ -91,9 +89,13 @@ namespace AsbCloudInfrastructure.Services
                 {
                     var telemetryStat = telemetriesStats.GetOrAdd(oldReq.Uid, (uid) => new TrackerStat { RemoteUid = uid });
                     telemetryStat.TelemetryDateMin = oldReq.DateMin;
-                    telemetryStat.TelemetryDateMax = oldReq.DateMax;                        
+                    telemetryStat.TelemetryDateMax = oldReq.DateMax;
                     telemetryStat.LastTimeServer = oldReq.DateMax;
                 }
+            }).ContinueWith((t) =>
+            {
+                db.Dispose();
+                return t;
             });
         }