open source Notesnook API

Notesnook.API/Extensions/TransactionHelper.cs

@@ -0,0 +1,25 @@
+using System.Threading;
+using System;
+using System.Threading.Tasks;
+
+namespace MongoDB.Driver
+{
+    public static class TransactionHelper
+    {
+        public static async Task StartTransaction(this IMongoClient client, Action<CancellationToken> operate, CancellationToken ct)
+        {
+            using (var session = await client.StartSessionAsync())
+            {
+                var transactionOptions = new TransactionOptions(readPreference: ReadPreference.Nearest, readConcern: ReadConcern.Local, writeConcern: WriteConcern.WMajority);
+                await session.WithTransactionAsync((handle, token) =>
+                {
+                    return Task.Run(() =>
+                    {
+                        operate(token);
+                        return true;
+                    });
+                }, transactionOptions, ct);
+            }
+        }
+    }
+}