Book Image

Learning Apache Apex

By : Thomas Weise, Ananth Gundabattula, Munagala V. Ramanath, David Yan, Kenneth Knowles
Book Image

Learning Apache Apex

By: Thomas Weise, Ananth Gundabattula, Munagala V. Ramanath, David Yan, Kenneth Knowles

Overview of this book

Apache Apex is a next-generation stream processing framework designed to operate on data at large scale, with minimum latency, maximum reliability, and strict correctness guarantees. Half of the book consists of Apex applications, showing you key aspects of data processing pipelines such as connectors for sources and sinks, and common data transformations. The other half of the book is evenly split into explaining the Apex framework, and tuning, testing, and scaling Apex applications. Much of our economic world depends on growing streams of data, such as social media feeds, financial records, data from mobile devices, sensors and machines (the Internet of Things - IoT). The projects in the book show how to process such streams to gain valuable, timely, and actionable insights. Traditional use cases, such as ETL, that currently consume a significant chunk of data engineering resources are also covered. The final chapter shows you future possibilities emerging in the streaming space, and how Apache Apex can contribute to it.
Table of Contents (17 chapters)
Title Page
Credits
About the Authors
About the Reviewer
www.PacktPub.com
Customer Feedback
Preface

Summary


In previous chapters, we explored what Apex is and how applications are built using it. The examples were simple, Hello World style. In this chapter, we introduced the Apex library, which is of central importance to developing real-world applications. The library contains the functional building blocks that are required to integrate with existing data infrastructure and operators that implement the transformations that are frequently needed for the stream processing.

The chapter also provided links to documentation and example applications for the operators that were covered, which will be helpful as the starting point when building your own application (after all, it is much easier to start from something that works and build on top of it, as opposed to starting from scratch). Beyond functionality, we also saw how various operators support aspects such as low latency, performance, scalability, fault-tolerance, and processing guarantees that are required for production-quality applications...