Book Image

Angular Services

By : Sohail Salehi
Book Image

Angular Services

By: Sohail Salehi

Overview of this book

A primary concern with modern day applications is that they need to be dynamic, and for that, data access from the server side, data authentication, and security are very important. Angular leverages its services to create such state-of-the-art dynamic applications. This book will help you create and design customized services, integrate them into your applications, import third-party plugins, and make your apps perform better and faster. This book starts with a basic rundown on how you can create your own Angular development environment compatible with v2 and v4. You will then use Bootstrap and Angular UI components to create pages. You will also understand how to use controllers to collect data and populate them into NG UIs. Later, you will then create a rating service to evaluate entries and assign a score to them. Next, you will create "cron jobs" in NG. We will then create a crawler service to find all relevant resources regarding a selected headline and generate reports on it. Finally, you will create a service to manage accuracy and provide feedback about troubled areas in the app created. This book is up to date for the 2.4 release and is compatible with the 4.0 release as well, and it does not have any code based on the beta or release candidates.
Table of Contents (15 chapters)
Angular Services
About the Author
About the Reviewer
Customer Feedback

The notifier wire-frame

The Notifier is a little bit more sophisticated. It will use the Collector service to collect and the rating service to rate the collected items, and it does this job automatically in specific hours. It is like implementing a Linux cron job inside Angular.


Please note we don't need the Collector and the Rating components for this wire-frame. Rather we need the mechanism that does the collecting and rating tasks. This situation should explain the difference between directives and components and the importance of each concept better. In Chapter 5, The Notifier Service- Creating Cron Jobs in Angular where we implement the service for this business logic - we will deal with the details of this requirement. There we will also discuss the dependency injection and child injectors in more details.

Let's say we want to be informed twice a day about all news which has a minimum rank of 8/10. Moreover, let's assume we want to be notified via e-mail and also we want to see...