Java on AWS 2020-12-15 - Speaker Deck

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Sean Sullivan Portland Java User Group December 15, 2020 Java on AWS

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This presentation reﬂects my personal opinion. It does not represent the views of my employer.

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Java is fine 2020

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which JDK should I use?

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Oracle JDK Amazon Corretto

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https://aws.amazon.com/corretto/

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Corretto provided at no-cost multi-platform long-term support from Amazon released quarterly

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Amazon runs Corretto internally on thousands of production services

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Corretto is released under the same open source license as OpenJDK

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https://github.com/corretto/corretto-jdk/

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Corretto is covered on the same basis as all other supported AWS Services and software. Already have an AWS Support Plan?

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JDK 8 JDK 11 JDK 15

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Corretto is multi-platform Linux Windows MacOS

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Corretto on Linux x86 ARM

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https://twitter.com/errcraft/status/1177385675340959744 September 2019 Corretto on ARM64

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Corretto Docker images

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docker pull amazoncorretto:8 docker pull amazoncorretto:15 docker pull amazoncorretto:11

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docker manifest inspect amazoncorretto:11

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{ "mediaType": "application/vnd.docker.distribution.manifest.v2+json", "size": 742, "digest": “sha256:9e612069601762761f296c13ecb8bca198f1821ab931fa6ca7e7db6fc644ef30 ", "platform": { "architecture": "amd64", "os": "linux" } } x86

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{ "mediaType": "application/vnd.docker.distribution.manifest.v2+json", "size": 742, "digest": “sha256:e71b5f2be284dfaa3a19cad2370600d1205fb0a41bbbe53dc530505c3ffc b1cb", "platform": { "architecture": "arm64", "os": "linux", "variant": "v8" } } ARM

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docker run amazoncorretto:11 java -version openjdk version "11.0.9.1" 2020-11-04 LTS OpenJDK Runtime Environment Corretto-11.0.9.12.1 (build 11.0.9.1+12-LTS) OpenJDK 64-Bit Server VM Corretto-11.0.9.12.1 (build 11.0.9.1+12-LTS, mixed mode)

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docker run amazoncorretto:11 uname -s -m Linux x86_64 x86

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docker run arm64v8/amazoncorretto:11 java -version openjdk version "11.0.9.1" 2020-11-04 LTS OpenJDK Runtime Environment Corretto-11.0.9.12.1 (build 11.0.9.1+12-LTS) OpenJDK 64-Bit Server VM Corretto-11.0.9.12.1 (build 11.0.9.1+12-LTS, mixed mode)

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docker run arm64v8/amazoncorretto:11 uname -s -m Linux aarch64 ARM 64

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https://aws.amazon.com/ec2/graviton/

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AWS re:Invent December 1, 2020

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AWS Graviton

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faster Java crypto?

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https://github.com/corretto/amazon-corretto-crypto-provider

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“algorithms are primarily backed by OpenSSL's implementations”

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Maven pom.xml

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com.amazon.corretto.crypto.provider.AmazonCorrettoCryptoProvider.install()

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Infrastructure as Code?

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Infrastructure as YAML Infrastructure as JSON Infrastructure as HCL

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AWS CDK https://aws.amazon.com/cdk/

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deﬁne your infrastructure in a familiar programming language

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TypeScript Java C# Python CDK languages

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writing YAML by hand AWS CDK

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CDK is open source

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npm install -g aws-cdk

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cdk synth cdk deploy mkdir my-project cd my-project cdk init app --language java

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Maven pom.xml

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import software.amazon.awscdk.core.Construct; import software.amazon.awscdk.core.Duration; import software.amazon.awscdk.core.Stack; import software.amazon.awscdk.core.StackProps; CDK core classes

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import software.amazon.awscdk.services.sns.Topic; import software.amazon.awscdk.services.sqs.Queue; import software.amazon.awscdk.services.lambda.Function; CDK Java imports

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AWS SDK for Java

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AWS SDK != AWS CDK

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AWS SDK v1 AWS SDK v2

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software.amazon.awssdk dynamodb 2.15.45 Maven pom.xml

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import software.amazon.awssdk.regions.Region; import software.amazon.awssdk.services.dynamodb.DynamoDbClient; import software.amazon.awssdk.services.dynamodb.model.ListTablesResponse; import software.amazon.awssdk.services.dynamodb.model.ListTablesRequest; Import statements

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Serverless Java?

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AWS Lambda

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AWS Lambda

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Maven pom.xml

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public class Handler implements RequestHandler public String handleRequest(S3Event s3event, Context context) { // handle S3 event }

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Lambda Powertools

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Integration Tests

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LocalStack

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https://github.com/localstack/localstack

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docker pull localstack/localstack

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LocalStack + TestContainers

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a Java library for embedding Docker containers

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Maven pom.xml

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TestContainers import org.testcontainers.utility.DockerImageName; import org.testcontainers.containers.localstack.LocalStackContainer; import static org.testcontainers.containers.localstack.LocalStackContainer.Service.S3; import static org.testcontainers.containers.localstack.LocalStackContainer.Service.SQS;

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TestContainers DockerImageName IMAGE_NAME = DockerImageName.parse(“localstack/localstack:0.12.3") public static LocalStackContainer CONTAINER = new LocalStackContainer(IMAGE_NAME) .withServices(S3, SQS);