AngularJS Services by Jim Lavin

By Jim Lavin

Layout, construct, and try out providers to create a starting place on your AngularJS applications

About This Book

Understand how providers are an important element of the AngularJS framework and the way leveraging prone can gain your applicationDesign and constitution your AngularJS prone and examine the simplest practices utilized in designing AngularJS servicesEffectively write, try out, and at last set up your application

Who This e-book Is For

If you're an intermediate JavaScript developer who's trying to improve your knowing of single-page net software improvement with a spotlight on AngularJS companies, then this ebook is for you.

What you are going to Learn

Write Jasmine situations to check your AngularJS services
Implement universal performance that may be leveraged through the controllers, directives, and different providers on your application
Build prone that create, retrieve, replace, and delete your application's info on exterior servers
Incorporate third-party JavaScript libraries into your AngularJS application
Move company common sense to the customer aspect to construct a brand new classification of serverless applications
Optimize your AngularJS software for optimum performance

In Detail

This e-book provide you with the abilities and most sensible practices had to create AngularJS companies. It starts off with the basics of what providers are and their position in a regular AngularJS program. you'll stroll in the course of the improvement of a real-world software utilizing providers around the a variety of program layers after which flow directly to create prone that offer cross-cutting issues reminiscent of messaging, logging, and authentication.

Next, the publication covers providers that offer info entry displaying you the way to have interaction with exterior cloud-based facts providers and the way to cache information at the consumer to minimize community latency. The ebook then exhibits you the way to write down prone that leverage different cloud-based providers to create mashups and contain performance on your software with no writing loads of code.

You also will the right way to create company common sense gadgets, principles engines, and finite country machines, that are used to supply company good judgment to your software.

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Extra info for AngularJS Services

Example text

As you build a recipe and add ingredients to the recipe, a rules engine gets invoked to match the current recipe with beer styles that best match the recipe's style parameters. If you were to have the rules engine return a promise from each call, the other views displayed on the page would not get notified when the rules engine finished and they would have to invoke the rules engine themselves in order to get the same data. However, if you use an eventing system, each of the views can subscribe to the rules engine's calculations complete event and be notified whenever the rules engine is run.

It then defines the onLogin method that is used as an ng-click handler to log the user in by publishing the message _AUTHENTICATE_USER_ with username and password as arguments for the topic subscribers. When the ng-click handler is executed, it publishes the message and then the controller waits for the service, which handles the message, to respond with _AUTHENTICATE_USER_COMPLETE_ message, which then takes the user object passed into the callback and assigns it the scope value currentUser. The handling of errors is done outside of the controller by other services and controllers.

It then defines the onLogin method that is used as an ng-click handler to log the user in by publishing the message _AUTHENTICATE_USER_ with username and password as arguments for the topic subscribers. When the ng-click handler is executed, it publishes the message and then the controller waits for the service, which handles the message, to respond with _AUTHENTICATE_USER_COMPLETE_ message, which then takes the user object passed into the callback and assigns it the scope value currentUser. The handling of errors is done outside of the controller by other services and controllers.

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