/// <summary>
/// Detach from the logging event source.
/// Implicitly take a snapshot.
/// </summary>
public void Detach()
{
if (_appender == null)
{
throw new InvalidOperationException("Not attached");
}
// RemoveAppender throws an exception if the appender
// to be removed is not in the list of appenders!
Interceptor.RemoveAppender(_appender);
TakeSnapshot();
_appender = null;
}
public void Attach()
{
// TODO Params to attach to specific repository/logger?
if (_appender != null)
{
throw new InvalidOperationException("Already attached");
}
// This should use the proper logger repository and
// it's a no-op if the appender is already attached:
Log4NetUtils.AddRootAppender(Interceptor);
var appender = new BufferAppender(Math.Max(1, Capacity), DateTime.Now);
var guid = Guid.NewGuid().ToString("N"); // hex digits only
appender.Name = $"Inspector_{guid}";
appender.Threshold = ConvertLevel(Threshold);
if (!string.IsNullOrEmpty(LoggerPrefix))
{
appender.AddFilter(new LoggerMatchFilter {
LoggerToMatch = LoggerPrefix
});
appender.AddFilter(new DenyAllFilter());
}
// An appender's Threshold and Filter chain interact as follows:
// 1. ignore e if e.Level < a.Threshold
// 2. walk filter chain until first Accept or Deny
// 3. PreAppendCheck() and exit if false
// 4. call Append(e)
Interceptor.AddAppender(appender);
// Just for the record:
// Adding the same instance again is a no-op. Adding another
// instance with the *same name* will be added to the list!
_appender = appender;
}
