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("fatal log");
chainRoot.Handle("fatal log", 1);
Console.WriteLine();
Console.WriteLine("error log");
chainRoot.Handle("error log", 2);
Console.WriteLine();
Console.WriteLine("error log");
chainRoot.Handle("error log", 2);
Console.WriteLine();
Console.WriteLine("info log");
chainRoot.Handle("info log", 3);
}
public void SetNext(LogHandlerBase next)
{
this.next = next;
}