// save
private void store(bool force = false)
{
// thresholds
const long save_interval_ms = 60 * 1000; // every minute
const int save_threshold = 200 * 1000; // 200k messages
// lock
m_file_mutex.WaitOne();
// do nothing if not allowed
if (!m_data_save_allowed)
{
m_file_mutex.ReleaseMutex();
return;
}
// do
if (storage_msg_list.Count > 0)
{
// now
DateTimeOffset now = DateTimeOffset.Now;
long now_ts = now.ToUnixTimeMilliseconds();
if (storage_ts == 0)
{
storage_ts = now_ts + save_interval_ms;
}
// check the conditions
if (storage_msg_list.Count >= save_threshold || now_ts >= storage_ts || force)
{
bool file_just_created = false;
if (string.IsNullOrEmpty(storage_file_path))
{
storage_file_path = string.Format("{0}\\trace\\",
System.IO.Path.GetDirectoryName(Application.ExecutablePath));
}
if (string.IsNullOrEmpty(storage_file_name))
{
storage_file_name = string.Format("trace_{0:yyyy_MM_dd_HH_mm_ss}.ctd", now);
file_just_created = true;
}
// make sure the dir exists
if (!Directory.Exists(storage_file_path))
{
Directory.CreateDirectory(storage_file_path);
}
// one more time
if (Directory.Exists(storage_file_path))
{
// compress
byte[] comp = Compression.CanMessagesCompress(storage_msg_list);
if (comp != null)
{
// store
using (var stream = new FileStream(storage_file_path + storage_file_name, FileMode.Append))
{
// append the title string
if (file_just_created)
{
string title = string.Format(
"User: {0}\nCAN Speed: {1}\n",
Environment.UserName, can_speed);
var buff = Encoding.ASCII.GetBytes(title + Environment.NewLine);
stream.Write(buff, 0, buff.Length);
}
// data
stream.Write(comp, 0, comp.Length);
}
}
}
// clean
storage_msg_list.Clear();
storage_ts = now_ts + save_interval_ms;
}
}
// unlock
m_file_mutex.ReleaseMutex();
}