Book Image

AWS Certified Developer - Associate Guide

By : Vipul Tankariya, Bhavin Parmar
Book Image

AWS Certified Developer - Associate Guide

By: Vipul Tankariya, Bhavin Parmar

Overview of this book

AWS Certified Developer - Associate Guide starts with a quick introduction to AWS and the prerequisites to get you started. Then, this book gives you a fair understanding of core AWS services and basic architecture. Next, this book will describe about getting familiar with Identity and Access Management (IAM) along with Virtual private cloud (VPC). Moving ahead you will learn about Elastic Compute cloud (EC2) and handling application traffic with Elastic Load Balancing (ELB). Going ahead you we will talk about Monitoring with CloudWatch, Simple storage service (S3) and Glacier and CloudFront along with other AWS storage options. Next we will take you through AWS DynamoDB – A NoSQL Database Service, Amazon Simple Queue Service (SQS) and CloudFormation Overview. Finally, this book covers understanding Elastic Beanstalk and overview of AWS lambda. At the end of this book, we will cover enough topics, tips and tricks along with mock tests for you to be able to pass the AWS Certified Developer - Associate exam and develop as well as manage your applications on the AWS platform.
Table of Contents (29 chapters)
Title Page
Credits
About the Author
Acknowledgments
About the Author
About the Reviewer
www.PacktPub.com
Customer Feedback
Dedication
Preface
Index

Event source mapping for AWS stream-based services


Figure 17.3 explains the way a custom application writes a record to a Kinesis stream and the way Lambda polls the stream:

Figure 17.3: Event source mapping for AWS stream-based services

Reference URL: https://docs.aws.amazon.com/lambda/latest/dg/images/kinesis-pull-10.png

The steps for the preceding figure are as follows:

  1. The custom application writes records to an Amazon Kinesis stream.
  2. At the same time, AWS Lambda continuously keeps polling the stream. As soon as it detects a new record on the stream, it invokes the AWS Lambda function. Based on the event configuration, it decides which Lambda function is to execute against which event source.
  3. It verifies that the attached IAM permission policy to the Lambda function allows it to poll the stream. If it is not true, then the AWS Lambda function is not invoked.