public LogMessage(object source, LogEventCategory category, string message)
{
EventSource = source;
Category = category;
Message = message;
Date = DateTime.Now;
}
public LogMessage(LogEventCategory category, string message, Exception exception)
{
Category = category;
Message = message;
Date = DateTime.Now;
Exception = exception;
}
public void Write(LogEventCategory category, string message, Exception exception = null)
{
lock (_mutex)
{
var msg = new LogMessage(category, message, exception);
Trace(msg);
foreach (var h in _handlers)
{
if ((h.Value & category) > 0)
{
h.Key(msg);
}
}
}
}
public void Subscribe(LogMessageHandler handler, LogEventCategory categories)
{
lock (_mutex)
{
if (handler == null)
{
throw new ArgumentNullException(nameof(handler));
}
if (_handlers.ContainsKey(handler))
{
_handlers[handler] |= categories;
}
else
{
_handlers.Add(handler, categories);
}
}
}
public void UnSubscribe(LogMessageHandler handler, LogEventCategory categories)
{
lock (_mutex)
{
if (handler == null)
{
throw new ArgumentNullException(nameof(handler));
}
if (!_handlers.ContainsKey(handler))
{
return;
}
_handlers[handler] ^= categories;
if (_handlers[handler] == 0)
{
_handlers.Remove(handler);
}
}
}
public void Subscribe(object logSource, LogEventCategory categories, LogMessageHandler handler)
{
lock (_mutex)
{
if (handler == null)
throw new ArgumentNullException("handler");
if (logSource == null)
throw new ArgumentNullException("logSource");
if (!_handlers.ContainsKey(logSource))
_handlers.Add(logSource, new List<HandlerCategoryPair>());
var handlerCategoryPair = _handlers[logSource].Where(i => i.Handler == handler).FirstOrDefault();
if (handlerCategoryPair != null)
handlerCategoryPair.Categories |= categories;
else
{
handlerCategoryPair = new HandlerCategoryPair() {Categories = categories, Handler = handler};
_handlers[logSource].Add(handlerCategoryPair);
}
}
}
public void UnSubscribe(object logSource, LogEventCategory categories, LogMessageHandler handler)
{
lock (_mutex)
{
if (handler == null)
throw new ArgumentNullException("handler");
if (logSource == null)
throw new ArgumentNullException("logSource");
if (!_handlers.ContainsKey(logSource))
return;
var handlerCategoryPair = _handlers[logSource].Where(i => i.Handler == handler).FirstOrDefault();
if (handlerCategoryPair == null)
return;
var newCategories = handlerCategoryPair.Categories ^ categories;
if (newCategories == 0)
{
_handlers[logSource].Remove(handlerCategoryPair);
if (_handlers[logSource].Count == 0)
_handlers.Remove(logSource);
}
else
{
handlerCategoryPair.Categories = newCategories;
}
}
}
public void Trace(LogEventCategory category, string message)
{
lock (_mutex)
{
var now = DateTime.Now;
var formatted = string.Format("[{0:D2}:{1:D2}:{2:D2}.{3:D3}] [{4}] {5}",
now.Hour, now.Minute, now.Second, now.Millisecond,
category, message);
Console.WriteLine(formatted);
_streamWriter.WriteLine(formatted);
_streamWriter.Flush();
}
}
