protected override void SubmitMessageQueue(LoggerEventArgs[] messages)
{
// Just in case if there are many mesages...
foreach (LoggerEventArgs e in messages)
{
String message = e.Message;
// If message fits in one line then print it as it is
if (message.Length < _splitPoint)
WriteMessageLine(e.TimeStamp, e.Tag, e.Message);
else
{
// Message too long, split it into multiple lines
Boolean firstLine = true;
while (message.Length != 0)
{
Int32 split = message.Substring(0, message.Length > _splitPoint ? _splitPoint : message.Length).LastIndexOf(' ');
if (split < 0) split = message.Length > _splitPoint ? _splitPoint : message.Length;
String msgLine = message.Substring(0, split);
message = message.Substring(message.Length > split + 1 ? split + 1 : message.Length);
if (firstLine)
{
WriteMessageLine(e.TimeStamp, e.Tag, msgLine);
firstLine = false;
}
else
WriteMessageLine(null, null, msgLine);
}
}
}
}
/// <summary>
/// Sends a log message to all attached loggers
/// </summary>
/// <param name="tag">Tag associated with the message</param>
/// <param name="format">Format string of the message</param>
/// <param name="args">Message format arguments</param>
public static void SendLogMessage(String tag, String format, params Object[] args)
{
if (_onLogMessage != null)
{
LoggerEventArgs e = new LoggerEventArgs(tag, format, args);
_onLogMessage(null, e);
}
}
protected override void SubmitMessageQueue(LoggerEventArgs[] messages)
{
foreach (LoggerEventArgs e in messages)
{
DateTime dt = new DateTime(e.TimeStamp * 10000);
String time = String.Format("{0}:{1}:{2}.{3}", dt.Hour, dt.Minute, dt.Second, dt.Millisecond);
_writer.WriteLine("{0,-20}{1,-20}{2}", time, e.Tag, e.Message);
}
_writer.Flush();
}
/// <summary>
/// Event handler for OnLogMessage event
/// </summary>
/// <param name="sender">Event origin</param>
/// <param name="e">Event data</param>
public void HandleMessage(Object sender, LoggerEventArgs e)
{
EnqueueMessage(e);
}
/// <summary>
/// Enqueues a message for processing
/// </summary>
/// <param name="arg"></param>
public virtual void EnqueueMessage(LoggerEventArgs arg)
{
_messages.Enqueue(arg);
}
// Logger thread method, must remain private!
private void IterateLogger()
{
while (true)
{
if (!_terminateRequest)
{
// Do nothing if there is no need to flush messages
if (_messages.Count < _submissionBatch)
continue;
else
{
// Submit messages if needed
/* A faster way of doing this might be to copy entire _messages into an array via ToArray() and clearing the queue,
* but considering that there can be new messages arriving between these two instructions, copying one by one
* seems more reliable. More investigation needed.
*/
LoggerEventArgs[] messages = new LoggerEventArgs[_submissionBatch];
for (int i = 0; i < _submissionBatch; i++)
{
if (!_messages.TryDequeue(out messages[i]))
throw new Exception("Logger.RunLogger(): Failed to dequeue the next log message!");
}
SubmitMessageQueue(messages);
}
}
else
{
// If termination is requested, submit remaining messages and quit the thread
SubmitMessageQueue(_messages.ToArray());
ReleaseResources();
break;
}
}
}
/// <summary> /// When implemented, writes a collection of log messages to underlying physical storage /// </summary> /// <param name="messages">Collection of messages to write</param> protected abstract void SubmitMessageQueue(LoggerEventArgs[] messages);