static void Main(string[] args)
{
LogHandlerBase infoHandler = new InfoHandler();
LogHandlerBase errorHandler = new ErrorHandler();
LogHandlerBase fatalHandler = new FatalHandler();
LogHandlerBase chainRoot = infoHandler;
infoHandler.SetNext(errorHandler);
errorHandler.SetNext(fatalHandler);
Console.WriteLine("error msg error log", 2);
chainRoot.Handle("error msg error log", 2);
Console.WriteLine();
Console.WriteLine("Info msg Info log", 3);
chainRoot.Handle("Info msg Info log", 3);
Console.WriteLine();
Console.WriteLine("fatal msg fatal log", 1);
chainRoot.Handle("fatal msg fatal log", 1);
Console.WriteLine();
}
public void SetNext(LogHandlerBase nextHandelr)
{
this.nextHandelr = nextHandelr;
}