Pattern: Chain

Description

Chain of responsibility pattern allows an object to send a command without knowing what object will receive and handle it. Chain the receiving objects and pass the request along the chain until an object handles it

Example in .NET :

Chain

namespace Chain;

public static class ChainDemo
{
    public static int SecondException()
    {
        try
        {
            FirstException();
            return 5;
        }
        catch (Exception ex)
        {
            throw new Exception($"from {nameof(SecondException)}",ex);
        }
    }
    static int FirstException()
    {
        throw new ArgumentException("argument");
    }
}

  

Learn More

Wikipedia

Homework

Implement a middleware in ASP.NET Core that intercepts the exception and logs it to the database. The middleware should be able to pass the exception to the next middleware in the chain.