//////////////////////////////////////////////////////////////
/// <summary>
/// This method is used to set the global trace file name
/// for all objects.
/// </summary>
/// <param name="filename">the file name; if the name is "" or
/// null, the Console.Error stream will be used</param>
/// <param name="append">true to append to an existing
/// file</param>
//////////////////////////////////////////////////////////////
public static void SetTraceFile(string filename, bool append)
{
lock (_ts)
{
if (_ts != null)
{
_ts.Close();
}
if ("" == filename || filename == null)
{
_ts = SystemTraceWriter.GetInstance();
return;
}
try
{
// make sure we expand any environment variables
filename = Environment.ExpandEnvironmentVariables(filename);
_ts = new FileTraceWriter(filename, append);
_traceFileName = filename;
}
catch (Exception e)
{
_traceFileName = "";
Console.Error.WriteLine(e);
_ts = SystemTraceWriter.GetInstance();
}
}
}
//////////////////////////////////////////////////////////////
/// <summary>
/// This is the singleton's factory method for creating or
/// obtaining a reference.
/// </summary>
/// <returns>a reference to the shared trace writer
/// instance</returns>
//////////////////////////////////////////////////////////////
public static TraceWriter GetInstance()
{
if (_instance == null)
{
_instance = new SystemTraceWriter();
}
return(_instance);
}