/// <summary>
/// *POI
/// Microsoft's implementation of IApplicationBuilder injects the RequestDelegate object. So
/// that parameter is required and it needs to be the first parameter in the constructor of
/// all middleware classes. The other parameters are objects we inject in Step 2.
/// </summary>
/// <param name="next">Represents the next module in the http pipeline.</param>
/// <param name="loggerFactory">The LoggerFactory object from the Startup.Configure() method.</param>
/// <param name="responseTimer">An instantiated ResponseTimer object.</param>
public ResponseTimeLogger(RequestDelegate next, ILoggerFactory loggerFactory, ResponseTimer responseTimer)
{
this.next = next;
this.loggerFactory = loggerFactory;
this.responseTimer = responseTimer;
}
/// <summary>
/// *POI Step 2
/// This extension method does two things.
/// 1. Gives us a way to add our custom middleware class to the Http Pipeline.
/// 2. Injects our dependencies into the ApplicationBuilder class.
/// </summary>
/// <param name="builder">Required to extend the ApplicationBuilder class.</param>
/// <param name="loggerFactory">The LoggerFactory object from the Startup.Configure() method.</param>
/// <param name="responseTimer">An instantiated ResponseTimer object.</param>
/// <returns></returns>
public static IApplicationBuilder UseResponseTimer(this IApplicationBuilder builder, ILoggerFactory loggerFactory, ResponseTimer responseTimer)
{
//This method will accept a parameter array but I always explicitly define parameter arrays.
return(builder.UseMiddleware <ResponseTimeLogger>(new object[] { loggerFactory, responseTimer }));
}