Book Image

Mastering ServiceNow - Second Edition

Book Image

Mastering ServiceNow - Second Edition

Overview of this book

ServiceNow is a SaaS application that provides workflow form-based applications. It is an ideal platform for creating enterprise-level applications giving requesters and fulfillers improved visibility and access to a process. ServiceNow-based applications often replace email by providing a better way to get work done. The book steps through the main aspects of the ServiceNow platform, from the ground up. It starts by exploring the core architecture of ServiceNow, including building the right data structure. To add business logic and control data, and interactivity to user interaction, you will be shown how to code on both server and the client. You will then learn more about the power of tasks, events and notifications. The book will then focus on using web services and other mechanisms to integrate ServiceNow with other systems. Furthermore, you will learn how to secure applications and data, and understand how ServiceNow performs logging and error reporting. You will then be shown how to package your applications and changes, so they can be installed elsewhere and ways to maintain them easily. If you wish to create an alternative simple interface, then explore ways to make ServiceNow beautiful using Service Portal. By the end of the book, you will know the fundamentals of the ServiceNow platform, helping you be a better ServiceNow System Administrator or developer.
Table of Contents (18 chapters)
Mastering ServiceNow Second Edition
Credits
Notice
About the Author
About the Reviewer
www.PacktPub.com
Preface

Efficiently transferring data to the client


Moving information from the instance to the browser is one of the most time consuming operations that you will need to do. The information you want could be many thousands of miles away, or it may take some time for the instance to process it. The users will not be impressed if their browser freezes while they wait.

We've already seen how the getReference function of GlideForm allows you to pull data from the instance through a reference field. This retrieves all the fields of a single record. But, it doesn't give very much control over what is sent and received.

GlideAjax is a technique that allows you to craft specific communication between the server and client, ensuring that only relevant data is transferred. Let's create a reusable way of grabbing the value of a single field of a record.

Tip

Since GlideRecord is not available to scoped apps, GlideAjax is the only way to get data from the client. However, it is also recommended to use it in non...