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Learning Apache Apex

You're reading from   Learning Apache Apex Real-time streaming applications with Apex

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Product type Paperback
Published in Nov 2017
Publisher
ISBN-13 9781788296403
Length 290 pages
Edition 1st Edition
Languages
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Authors (5):
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Munagala V. Ramanath Munagala V. Ramanath
Author Profile Icon Munagala V. Ramanath
Munagala V. Ramanath
David Yan David Yan
Author Profile Icon David Yan
David Yan
Ananth Gundabattula Ananth Gundabattula
Author Profile Icon Ananth Gundabattula
Ananth Gundabattula
Thomas Weise Thomas Weise
Author Profile Icon Thomas Weise
Thomas Weise
Kenneth Knowles Kenneth Knowles
Author Profile Icon Kenneth Knowles
Kenneth Knowles
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Toc

Table of Contents (11) Chapters Close

Preface 1. Introduction to Apex FREE CHAPTER 2. Getting Started with Application Development 3. The Apex Library 4. Scalability, Low Latency, and Performance 5. Fault Tolerance and Reliability 6. Example Project – Real-Time Aggregation and Visualization 7. Example Project – Real-Time Ride Service Data Processing 8. Example Project – ETL Using SQL 9. Introduction to Apache Beam 10. The Future of Stream Processing

Summary


In this chapter, we examined a powerful tool in Apex library—the SQL API (Calcite integration)—and how it enables us to build classical ETL applications using SQL to automatically create many operators and link them into the DAG. We also covered how to build the application to produce the application archive (.apa) file which can be deployed in a cluster.

We also saw how to run the integration test locally, on our development machine, to enable detection of bugs, configuration errors, and other defects early in the development process, without the need to install Hadoop, ZooKeeper, or Kafka. We then took a detailed look at the application log messages and saw how to interpret them.

We rounded out the chapter by summarizing the classes involved in the Calcite integration.

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