Programming AWS Lambda: Build and Deploy Serverless Applications with Java

Copyright
Table of Contents
Foreword
Preface
	About This Book
	Why We Wrote This Book
	Who This Book Is For
	Why You Need This Book
	Using the End-of-Chapter Exercises
	Conventions Used in This Book
	Using Code Examples
	O’Reilly Online Learning
	How to Contact Us
	Acknowledgments
Chapter 1. Introduction to Serverless, Amazon Web Services, and AWS Lambda
	A Quick History Lesson
	The Cloud Grows
	Enter Serverless
		Backend as a Service
		Functions as a Service
		Differentiating Serverless
	What Is AWS?
		Types of Service
		Capacity
		Who Uses AWS?
		How Do You Use AWS?
	What Is AWS Lambda?
		Functions as a Service
		FaaS as Implemented by Lambda
		Why Lambda?
		What Does a Lambda Application Look Like?
		AWS Lambda in the Java World
	Summary
	Exercises
Chapter 2. Getting Started with AWS Lambda
	Quick Guide to the AWS Console
		Regions
		Identity and Access Management
	Lambda Hello World (as Quickly as Possible)
	Setting Up Your Development Environment
		AWS Command Line Interface
		Java Setup
		AWS SAM CLI Installation
	Lambda Hello World (the Proper Way)
		Creating Your First Java Lambda Project
		Building Hello World
		Creating the Lambda Function
	Summary
	Exercises
Chapter 3. Programming AWS Lambda Functions
	Core Concepts: Runtime Model, Invocation
		The Lambda Execution Environment
		Invocation Types
		Introduction to Logging
	Input, Output
		Lambda Function Method Signatures
		Configuring the Handler Function in the SAM Template
		Basic Types
		Lists and Maps
		POJOs and Ecosystem Types
		Streams
		Context
	Timeout
	Memory and CPU
	Environment Variables
	Summary
	Exercises
Chapter 4. Operating AWS Lambda Functions
	Build and Package
	Uberjars
	Assembling a ZIP File
	Reproducible Builds
	Deploy
	Infrastructure as Code
	CloudFormation and the Serverless Application Model
	Security
		The Principle of Least Privilege
		Identity and Access Management
	Summary
	Exercises
Chapter 5. Building Serverless Applications
	Lambda Event Sources
		Writing Code to Work with Input and Output for Event Sources
		Configuring a Lambda Event Source
		Understanding Different Event Source Semantics
	Example: Building a Serverless API
		Behavior
		Architecture
		Lambda Code
		Build and Package Using the AWS SDK BOM
		Infrastructure
		Deployment
	Example: Building a Serverless Data Pipeline
		Behavior
		Architecture
		Lambda Code
		Build and Package Using Multiple Modules and Isolated Artifacts
		Infrastructure
		Deployment
	Summary
	Exercises
Chapter 6. Testing
	The Test Pyramid
		Unit Tests
		Functional Tests
		End-to-End Tests
	Refactoring for Testing
	Revisiting BulkEventsLambda
	Refactoring BulkEventsLambda
		Add Constructors
		Isolate Side Effects
		Split Methods
	Testing BulkEventsLambda
		Unit Testing
		Functional Testing
	End-to-End Testing
	Local Cloud Testing
	Cloud Test Environments
	Summary
	Exercise
Chapter 7. Logging, Metrics, and Tracing
	Logging
		CloudWatch Logs
		LambdaLogger
		Java Logging Frameworks
		Structured Logging
		Structured Logging in Java
		CloudWatch Logs Insights
	Metrics
		CloudWatch Metrics
		Lambda Platform Metrics
		Business Metrics
		Alarms
		Distributed Tracing
		Finding Errors
	Summary
	Exercises
Chapter 8. Advanced AWS Lambda
	Error Handling
		Classes of Error
		The Various Behaviors of Lambda Error Processing
		Deep Dive into Asynchronous Event Source Errors
		Handling Kinesis and DynamoDB Stream Errors
		Tracing Errors with X-Ray
		Error Handling Strategies
	Scaling
		Observing Lambda Scaling
		Scaling Limits and Throttling
		Thread Safety
		Vertical Scaling
	Versions and Aliases, Traffic Shifting
		Lambda Versions
		Lambda Aliases
		Traffic Shifting
		When (Not) to Use Versions and Aliases
	Cold Starts
		What Is a Cold Start?
		When Does a Cold Start Occur?
		Identifying Cold Starts
		Impact of Cold Starts
		Mitigating Cold Starts
		Provisioned Concurrency
		Cold Start Summary
	State
		Persistent Application State
		Caching
	Lambda and Java Application Frameworks
	Virtual Private Clouds
		Architectural Concerns of Using Lambda with a VPCs
		Configuring Lambda to Use a VPC
		Alternatives
	Layers and Runtimes
		What Are Layers?
		When to Use, and Not Use, Layers
		Custom Runtimes
	Summary
	Exercises
Chapter 9. Advanced Serverless Architecture
	Serverless Architecture “Gotchas”
		At-Least-Once Delivery
		Impacts of Lambda Scaling on Downstream Systems
		The “Fine Print” of Lambda Event Sources
	New Patterns of Architecture Enabled by Serverless Thinking
		Published Components with the Serverless Application Repository
		Globally Distributed Applications
	Summary
	Exercises
Chapter 10. Conclusion
Index
About the Authors
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