Added logging for number of database connections

inabox.database.sqlite/SQLiteProvider.cs

@@ -15,10 +15,12 @@ namespace InABox.Database.SQLite
     {
         public SQLiteConnection Connection { get; private set; }
 
+        protected static int nConnections = 0;
+
         public void Dispose()
         {
-            if (Connection != null)
-                Connection.Close();
+            Connection?.Close();
+            --nConnections;
         }
 
         public SQLiteCommand CreateCommand()
@@ -33,12 +35,14 @@ namespace InABox.Database.SQLite
             sb.Version = 3;
             sb.DateTimeFormat = SQLiteDateFormats.Ticks;
             sb.JournalMode = SQLiteJournalModeEnum.Wal;
+            
             var conn = sb.ToString();
 
             Connection = new SQLiteConnection(conn);
             Connection.BusyTimeout = Convert.ToInt32(TimeSpan.FromMinutes(2).TotalMilliseconds);
             Connection.Open();
             Connection.SetLimitOption(SQLiteLimitOpsEnum.SQLITE_LIMIT_VARIABLE_NUMBER, 10000);
+            ++nConnections;
         }
     }
 
@@ -61,13 +65,17 @@ namespace InABox.Database.SQLite
                 {
                     Setup(url);
                 }
+                catch(Exception e)
+                {
+                    throw new Exception($"Exception while acquiring write lock! {nConnections} connections open.", e);
+                }
                 finally
                 {
                     Monitor.Exit(writelock);
                 }
 
             if (Connection == null)
-                throw new Exception("Timeout while aqcuiring write lock!");
+                throw new Exception($"Timeout while aqcuiring write lock! {nConnections} connections open.");
         }
 
         public SQLiteTransaction BeginTransaction()