book

Programming AWS Lambda

by John Chapin, Mike Roberts

March 2020

Intermediate to advanced

275 pages

6h 59m

English

O'Reilly Media, Inc.

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About This BookWhy We Wrote This BookWho This Book Is ForWhy You Need This BookUsing the End-of-Chapter ExercisesConventions Used in This BookUsing Code ExamplesO’Reilly Online LearningHow to Contact UsAcknowledgments
A Quick History LessonThe Cloud GrowsEnter ServerlessBackend as a ServiceFunctions as a ServiceDifferentiating ServerlessWhat Is AWS?Types of ServiceCapacityWho Uses AWS?How Do You Use AWS?What Is AWS Lambda?Functions as a ServiceFaaS as Implemented by LambdaWhy Lambda?What Does a Lambda Application Look Like?AWS Lambda in the Java WorldSummaryExercises
Quick Guide to the AWS ConsoleRegionsIdentity and Access ManagementLambda Hello World (as Quickly as Possible)Setting Up Your Development EnvironmentAWS Command Line InterfaceJava SetupAWS SAM CLI InstallationLambda Hello World (the Proper Way)Creating Your First Java Lambda ProjectBuilding Hello WorldCreating the Lambda FunctionSummaryExercises
Core Concepts: Runtime Model, InvocationThe Lambda Execution EnvironmentInvocation TypesIntroduction to LoggingInput, OutputLambda Function Method SignaturesConfiguring the Handler Function in the SAM TemplateBasic TypesLists and MapsPOJOs and Ecosystem TypesStreamsContextTimeoutMemory and CPUEnvironment VariablesSummaryExercises
Build and PackageUberjarsAssembling a ZIP FileReproducible BuildsDeployInfrastructure as CodeCloudFormation and the Serverless Application ModelSecurityThe Principle of Least PrivilegeIdentity and Access ManagementSummaryExercises
Lambda Event SourcesWriting Code to Work with Input and Output for Event SourcesConfiguring a Lambda Event SourceUnderstanding Different Event Source SemanticsExample: Building a Serverless APIBehaviorArchitectureLambda CodeBuild and Package Using the AWS SDK BOMInfrastructureDeploymentExample: Building a Serverless Data PipelineBehaviorArchitectureLambda CodeBuild and Package Using Multiple Modules and Isolated ArtifactsInfrastructureDeploymentSummaryExercises
The Test PyramidUnit TestsFunctional TestsEnd-to-End TestsRefactoring for TestingRevisiting BulkEventsLambdaRefactoring BulkEventsLambdaAdd ConstructorsIsolate Side EffectsSplit MethodsTesting BulkEventsLambdaUnit TestingFunctional TestingEnd-to-End TestingLocal Cloud TestingCloud Test EnvironmentsSummaryExercise
LoggingCloudWatch LogsLambdaLoggerJava Logging FrameworksStructured LoggingStructured Logging in JavaCloudWatch Logs InsightsMetricsCloudWatch MetricsLambda Platform MetricsBusiness MetricsAlarmsDistributed TracingFinding ErrorsSummaryExercises
Error HandlingClasses of ErrorThe Various Behaviors of Lambda Error ProcessingDeep Dive into Asynchronous Event Source ErrorsHandling Kinesis and DynamoDB Stream ErrorsTracing Errors with X-RayError Handling StrategiesScalingObserving Lambda ScalingScaling Limits and ThrottlingThread SafetyVertical ScalingVersions and Aliases, Traffic ShiftingLambda VersionsLambda AliasesTraffic ShiftingWhen (Not) to Use Versions and AliasesCold StartsWhat Is a Cold Start?When Does a Cold Start Occur?Identifying Cold StartsImpact of Cold StartsMitigating Cold StartsProvisioned ConcurrencyCold Start SummaryStatePersistent Application StateCachingLambda and Java Application FrameworksVirtual Private CloudsArchitectural Concerns of Using Lambda with a VPCsConfiguring Lambda to Use a VPCAlternativesLayers and RuntimesWhat Are Layers?When to Use, and Not Use, LayersCustom RuntimesSummaryExercises

Serverless Architecture “Gotchas”At-Least-Once DeliveryImpacts of Lambda Scaling on Downstream SystemsThe “Fine Print” of Lambda Event SourcesNew Patterns of Architecture Enabled by Serverless ThinkingPublished Components with the Serverless Application RepositoryGlobally Distributed ApplicationsSummaryExercises

Overview

Serverless revolutionizes the way organizations build and deploy software. With this hands-on guide, Java engineers will learn how to use their experience in the new world of serverless computing. You’ll discover how this cloud computing execution model can drastically decrease the complexity in developing and operating applications while reducing costs and time to market.

Engineering leaders John Chapin and Mike Roberts guide you through the process of developing these applications using AWS Lambda, Amazon’s event-driven, serverless computing platform. You’ll learn how to prepare the development environment, program Lambda functions, and deploy and operate your serverless software. The chapters include exercises to help you through each aspect of the process.

Get an introduction to serverless, functions as a service, and AWS Lambda
Learn how to deploy working Lambda functions to the cloud
Program Lambda functions and learn how the Lambda platform integrates with other AWS services
Build and package Java-based Lambda code and dependencies
Create serverless applications by building a serverless API and data pipeline
Test your serverless applications using automated techniques
Apply advanced techniques to build production-ready applications
Understand both the gotchas and new opportunities of serverless architecture