/// <summary>
/// Gets the event by ID.
/// </summary>
public override Event GetEventByID(long eventID)
{
try
{
stopwatch.Restart();
conn.Open();
string sql = queryBuilder.SelectEventQuery +
"WHERE event_id = @eventID AND @startTime <= time_stamp AND time_stamp < @endTime";
DateTime eventTime = ScadaUtils.RetrieveTimeFromID(eventID); // accurate to seconds
NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
cmd.Parameters.AddWithValue("eventID", eventID);
cmd.Parameters.AddWithValue("startTime", eventTime);
cmd.Parameters.AddWithValue("endTime", eventTime.AddSeconds(1.0));
Event ev = null;
using (NpgsqlDataReader reader = cmd.ExecuteReader(CommandBehavior.SingleRow))
{
if (reader.Read())
{
ev = ReadEvent(reader);
}
}
stopwatch.Stop();
arcLog?.WriteAction(ServerPhrases.ReadingEventCompleted, stopwatch.ElapsedMilliseconds);
return(ev);
}
finally
{
conn.Close();
}
}
/// <summary>
/// Gets the event by ID.
/// </summary>
public override Event GetEventByID(long eventID)
{
stopwatch.Restart();
EventTable eventTable = GetEventTable(ScadaUtils.RetrieveTimeFromID(eventID));
Event ev = eventTable.GetEventByID(eventID);
stopwatch.Stop();
arcLog?.WriteAction(ServerPhrases.ReadingEventCompleted, stopwatch.ElapsedMilliseconds);
return(ev);
}
/// <summary>
/// Acknowledges the event.
/// </summary>
public override void AckEvent(long eventID, DateTime timestamp, int userID)
{
EventTable eventTable = GetEventTable(ScadaUtils.RetrieveTimeFromID(eventID));
Event ev = eventTable.GetEventByID(eventID);
if (ev != null)
{
stopwatch.Restart();
ev.Ack = true;
ev.AckTimestamp = timestamp;
ev.AckUserID = userID;
adapter.FileName = eventTable.FileName;
adapter.WriteEventAck(ev);
eventTable.FileAge = File.GetLastWriteTimeUtc(eventTable.FileName);
stopwatch.Stop();
arcLog?.WriteAction(ServerPhrases.AckEventCompleted, stopwatch.ElapsedMilliseconds);
}
}
/// <summary>
/// Acknowledges the event.
/// </summary>
public override void AckEvent(EventAck eventAck)
{
try
{
stopwatch.Restart();
conn.Open();
string sql = $"UPDATE {queryBuilder.EventTable} " +
"SET ack = true, ack_timestamp = @ackTimestamp, ack_user_id = @ackUserID " +
"WHERE event_id = @eventID AND @startTime <= time_stamp AND time_stamp < @endTime";
DateTime eventTime = ScadaUtils.RetrieveTimeFromID(eventAck.EventID);
NpgsqlCommand cmd = new NpgsqlCommand(sql, conn);
cmd.Parameters.AddWithValue("ackTimestamp", eventAck.Timestamp);
cmd.Parameters.AddWithValue("ackUserID", eventAck.UserID);
cmd.Parameters.AddWithValue("eventID", eventAck.EventID);
cmd.Parameters.AddWithValue("startTime", eventTime);
cmd.Parameters.AddWithValue("endTime", eventTime.AddSeconds(1.0));
int rowsAffected = cmd.ExecuteNonQuery();
stopwatch.Stop();
if (rowsAffected > 0)
{
arcLog?.WriteAction(ServerPhrases.AckEventCompleted, eventAck.EventID,
stopwatch.ElapsedMilliseconds);
}
else
{
arcLog?.WriteAction(ServerPhrases.AckEventNotFound, eventAck.EventID);
}
}
finally
{
conn.Close();
}
}
