Book Image

Learning Apache Flink

By : Tanmay Deshpande
Book Image

Learning Apache Flink

By: Tanmay Deshpande

Overview of this book

<p>With the advent of massive computer systems, organizations in different domains generate large amounts of data on a real-time basis. The latest entrant to big data processing, Apache Flink, is designed to process continuous streams of data at a lightning fast pace.</p> <p>This book will be your definitive guide to batch and stream data processing with Apache Flink. The book begins with introducing the Apache Flink ecosystem, setting it up and using the DataSet and DataStream API for processing batch and streaming datasets. Bringing the power of SQL to Flink, this book will then explore the Table API for querying and manipulating data. In the latter half of the book, readers will get to learn the remaining ecosystem of Apache Flink to achieve complex tasks such as event processing, machine learning, and graph processing. The final part of the book would consist of topics such as scaling Flink solutions, performance optimization and integrating Flink with other tools such as ElasticSearch.</p> <p>Whether you want to dive deeper into Apache Flink, or want to investigate how to get more out of this powerful technology, you’ll find everything you need inside.</p>
Table of Contents (17 chapters)
Learning Apache Flink
About the Author
About the Reviewers
Customer Feedback

Chapter 2.  Data Processing Using the DataStream API

Real-time analytics is currently an important issue. Many different domains need to process data in real time. So far there have been multiple technologies trying to provide this capability. Technologies such as Storm and Spark have been on the market for a long time now. Applications derived from the Internet of Things (IoT) need data to be stored, processed, and analyzed in real or near real time. In order to cater for such needs, Flink provides a streaming data processing API called DataStream API.

In this chapter, we are going to look at the details relating to DataStream API, covering the following topics:

  • Execution environment

  • Data sources

  • Transformations

  • Data sinks

  • Connectors

  •  Use case - sensor data analytics

Any Flink program works on a certain defined anatomy as follows:

We will be looking at each step and how we can use DataStream API with this anatomy.