Front end and middleware components must agree on an interface for authentication, authorization, exchanging data, etc., and engineers developing these components often work on the same team or closely together. These components, however, do not require tight coupling, and separately developing and running components can increase feature velocity and improve reliability. To separate concerns between an Angular application and its middleware, let’s set up an in-memory API that runs in the debugging environment, while automatically switching to the HTTP API when the application runs in production.
Angular CLI gets projects up and running quickly. If we’re building any substantial web application, soon we’ll need to add routing for displaying different views. To add routing, follow the steps below after generating an Angular CLI project.
A Cassandra data store is made up of a collection of Column Families often referred to as tables. Within each table is a collection of columns. These columns consist of a combination of metadata and data.
The resolve property of UI Router’s state definition delays changing state until data is loaded. This allows us to avoid entering states for which we don’t have necessary data, as well as prevents views from rendering in an unpredictable fashion when asynchronous requests finish at different times.
Requests made with the AngularJS $http service execute asynchronously. In certain situations, we may want to avoid executing the request’s success callback function and effectively cancel the request.
In the $http service docs, you’ll find a timeout configuration property. According to the docs, this property represents a “timeout in milliseconds, or promise that should abort the request when resolved.”