Book Image

Rapid Application Development with OutSystems

By : Ricardo Pereira
Book Image

Rapid Application Development with OutSystems

By: Ricardo Pereira

Overview of this book

OutSystems is a software development platform that speeds up the build phase by abstracting code and making almost everything visual. This means replacing textual language with visual artifacts that avoid lexical errors and speed up code composition using accelerators and predefined templates. The book begins by walking you through the fundamentals of the technology, along with a general overview of end-to-end web and mobile software development. You'll learn how to configure your personal area in the cloud and use the OutSystems IDE to connect with it. The book then shows you how to build a web application based on the best architectural and developmental practices in the market, and takes the same approach for the mobile paradigm. As you advance, you'll find out how to develop the same application, and the great potential of reusing code from one paradigm in another and the symbiosis between them is showcased.The only application that'll differ from the application in the exercise is the one used in business process technology (BPT), with a focus on a common market use case. By the end of this OutSystems book, you'll be able to develop enterprise-level applications on the web and mobile, integrating them with third parties and other systems on the market. You'll also understand the concepts of performance, security, and software construction and be able to apply them effectively.
Table of Contents (21 chapters)
1
Section 1: OutSystems 101
5
Section 2: The Magical Path of the Backend
10
Section 3: Create Value and Innovate with the Frontend
16
Section 4: Extensibility and Complexity of the OutSystems Platform

Global Exception handler

A global Exception is intended to log all events arising from Exceptions not handled during the operation of applications.

In cases where there is no specific Exception handler to handle something that occurs at a certain level, it will bubble up through the functionality's call stack until it finds the handler it needs. If you don't find it until you reach the last level (usually the frontend module of the application), the global Exception of that module does the job.

These handlers are defined in a frontend flow and are then associated with the module in the Global Exception Handler attribute, as shown in Figure 7.4:

Figure 7.7 – Use and definition of a global Exception in the frontend module

With this, we realize that the global Exception handler is our last resort as it allows us to handle errors and unexpected events, and it prevents our application from being in limbo in case of a crash or accident. This...