What is the use of design patterns?
Design patterns provide general solutions, documented in a format that doesn’t require specifics tied to a particular problem. In addition, patterns allow developers to communicate using well-known, well understood names for software interactions.
What is interceptor code?
A request interceptor is a piece of code that gets activated for every single HTTP request received by your application. Interceptors are very useful when you need to perform some common processing for every HTTP request.
What are the benefits of having design pattern?
Design patterns help promote easier program changes and object reusability. Loosely coupled objects are easier to reuse and change. Keeping objects small and specialized promotes loose coupling. Design patterns are built with many small specialized objects.
Why do we need interceptors?
Interceptors are a unique type of Angular Service that we can implement. Interceptors allow us to intercept incoming or outgoing HTTP requests using the HttpClient . By intercepting the HTTP request, we can modify or change the value of the request.
How do you use interceptor?
To implement an interceptor, you’ll want to create a class that’s injectable and that implements HttpInterceptor. The intercept method takes two arguments, req and next, and returns an observable of type HttpEvent. req is the request object itself and is of type HTTP Request.
How design patterns help in the software development process?
Practice. Design patterns can speed up the development process by providing tested, proven development paradigms. Effective software design requires considering issues that may not become visible until later in the implementation. By definition, a pattern must be programmed anew into each application that uses it.
Why are interceptors used?
An interceptor aircraft, or simply interceptor, is a type of fighter aircraft designed specifically for the defensive interception role against an attacking enemy aircraft, particularly bombers and reconnaissance aircraft.
What is difference between filter and interceptor?
The difference between filter and Interceptor: 2 filter is specified by servlet specification and can only be used in web program. 3 filter can intercept almost all requests (including requests for static resources), while interceptor only intercepts action requests (not static resource requests).
https://www.youtube.com/watch?v=WXxxJhX1FrE