Book Image

Mastering Application Development with

By : Kevin J. Poorman
Book Image

Mastering Application Development with

By: Kevin J. Poorman

Overview of this book is an extremely powerful, scalable, and secure cloud platform, delivering a complete technology stack, ranging from databases and security to workflow and the user interface. With's cloud platform, you can build any business application and run it on your servers. The book will help you enhance your skillset and develop complex applications using It gets you started with a quick refresher of's development tools and methodologies, and moves to an in-depth discussion of triggers, bulkification, DML order of operations, and trigger frameworks. Next, you will learn to use batchable and schedulable interfaces to process massive amounts of information asynchronously. You will also be introduced to Salesforce Lightning and cover components—including backend (apex) controllers, frontend (JavaScript) controllers, events, and attributes—in detail. Moving on, the book will focus on testing various apex components: what to test, when to write the tests, and—most importantly—how to test. Next, you will develop a changeset and use it to migrate your code from one org to another, and learn what other tools are out there for deploying metadata. You will also use command-line tools to authenticate and access the Rest sObject API and the Bulk sObject API; additionally, you will write a custom Rest endpoint, and learn how to structure a project so that multiple developers can work independently of each other without causing metadata conflicts. Finally, you will take an in-depth look at the overarching best practices for architecture (structure) and engineering (code) applications on the platform.
Table of Contents (16 chapters)
Mastering Application Development with
About the Author
About the Reviewers

Queueable classes

With the recent Spring '15 release, Apex developers have a new asynchronous tool, queueable Apex classes. At first glance, queueable classes are very similar to @future annotated methods. A closer look, however, reveals their true power. There are three key differences between @future and queueable classes:

  • The method for enqueueing a job returns an ID, allowing you to monitor its progress much like a batch or scheduled job

  • Queueable jobs accept sObjects

  • Finally, and perhaps most importantly, queueable code can invoke queueable code—no more exceptions complaining about how you are trying to call the @future methods or batch methods from an @future context

Implementing the queueable interface is very similar to implementing the batchable or schedulable interfaces. Simply define your class as implementing the queueable interface and implement the execute() method. Likewise, your implementation of the execute() method must accept one argument of the QueueableContext type. This...