The document discusses the AWS Java ecosystem. It covers Amazon Corretto, an open source distribution of OpenJDK supported by Amazon; the AWS SDK for Java 2.0 which provides asynchronous and non-blocking APIs; the AWS Toolkit for IntelliJ and PyCharm which make it easier to develop AWS Lambda functions locally; and the AWS Cloud Development Kit (CDK) which allows defining AWS infrastructure as code using familiar programming languages like Java. It also provides examples of using these tools and frameworks to build and deploy a sample Spring Boot application on AWS.

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SYDNEY

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AWS for Java developers in 2019
James Ousby
Solutions Architect
Amazon Web Services

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AWS Java ecosystem
Execution
environments

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AWS Java ecosystem

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AWS Java ecosystem

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AWS Java ecosystem

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AWS Java ecosystem

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AWS Java ecosystem

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AWS Java ecosystem

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AWS Java ecosystem

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AWS Java ecosystem

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AWS Java ecosystem

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AWS Java ecosystem
Execution
environments

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AWS Java ecosystem
Execution environments

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AWS Java ecosystem
Execution
environments

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AWS Java ecosystem

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AWS Java ecosystem
Execution
environments

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AWS Java ecosystem

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AWS Java ecosystem
Execution
environments

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AWS Java ecosystem

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AWS Java ecosystem
Execution
environments

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AWS Java ecosystem

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Amazon Corretto
Execution
environments

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Amazon Corretto
Execution environments

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“Amazon has a long and deep history
with Java. I’m thrilled to see the work
of our internal mission-critical Java
team being made available to the rest
of the world.”
James Gosling
Distinguished Engineer, Amazon Web Services

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Amazon Corretto
Amazon supported distribution
of OpenJDK
Run internally on thousand of
production services
Multiplatform
Amazon Linux 2, Windows, MacOS,
Ubuntu, RHEL, CentOS, SUSE, Docker
No cost
Distributed under open source license
Long term support
Corretto 8 until Jun 2023
Corretto 11 until (at least) Aug 2024
All patches and enhancements
up streamed to OpenJDK
Open source
https://github.com/corretto
https://aws.amazon.com/corretto

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AWS Toolkit for IntelliJ and AWS Toolkit for PyCharm
Execution
environments

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AWS Toolkit for IntelliJ and AWS Toolkit for PyCharm

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AWS Toolkit for IntelliJ and AWS Toolkit for PyCharm
Make it easier to develop on AWS
Open source
https://aws.amazon.com/intellij
Initial focus
AWS Lambda
AWS SAM CLI integration
Local debugging
Serverless application support
Basic resource / credentials
management

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AWS SDK for Java 2.0

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SnsAsyncClient.builder()
.region(Region.US_WEST_2)
.credentialsProvider(ProfileCredentialsProvider.create())
.build();
SnsAsyncClient.builder()
.region(Region.US_WEST_2)
.overideConfiguration(
ClientOverrideConfiguration.builder()
.apiCallTimeout(Duration.ofSeconds(5)
.build())
.build();
SnsAsyncClient.builder()
.region(Region.US_WEST_2)
.overideConfiguration(o -> o.apiCallTimeout(Duration.ofSeconds(5)))
.build();
AWS SDK for Java 2.0
Core tenets
Non-blocking asynchronous service clients
Immutability through builder pattern
Pluggable HTTP clients
Consumer builder pattern
SnsAsyncClient.create()SnsAsyncClient.builder()
.region(Region.US_WEST_2)
.httpClient(UrlConnectionHttpClient.create())
.build();

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AWS SDK for Java 2.0
Other callout features
Modularised (as in Java 9 Modules – Project Jigsaw)
Endpoint discovery
DynamoDBClient.builder()
.region(Region.US_WEST_2)
.enableEndpointDiscovery()
.build();
<service>.<region>.amazonaws.comdynamodb.ap-southeast-2.amazonaws.commyid2.dynamodb.ap-southeast-2.amazonaws.com
myid1.dynamodb.ap-southeast-2.amazonaws.com
myid3.dynamodb.ap-southeast-2.amazonaws.com

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AWS SDK for Java 2.0
Other callout features
Modularised (as in Java 9 Modules – Project Jigsaw)
Endpoint discovery
HTTP/2 event streaming
Fully non blocking HTTP/2 clients
Bi-directional real-time streaming responses
Reactive streams support
Asynchronous stream processing with non-blocking back pressure

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AWS CDK
Execution
environments

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AWS CDK

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The journey to AWS CDK
“CloudFormation JSON / YAML as an intermediary
format like bytecode on the JVM?”
2006 – Provision via API
2010 – Provision via AWS SDK for Java
2010 – Provision via CloudFormation
2018 – Provision via AWS CDK generated CloudFormation

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AWS CDK example
Amazon Simple
Notification Service
Stack
Amazon Simple
Queue Service

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AWS CDK example
Queue queue = new Queue(this, "Queue", QueueProps.builder()
.withVisibilityTimeoutSec(300)
.build());
Topic topic = new Topic(this, "Topic", TopicProps.builder()
.withDisplayName("Some Amazing Topic")
.build());
topic.subscribeQueue(queue);

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AWS CDK example
{
"Resources": {
"Queue4A7E3555": {
"Type": "AWS::SQS::Queue",
"Properties": { "VisibilityTimeout": 300 }
},
"QueuePolicy25439813": {
"Type": "AWS::SQS::QueuePolicy",
"Properties": {
"PolicyDocument": {
"Statement": [
{
"Action": "sqs:SendMessage",
"Condition": {
"ArnEquals": {
"aws:SourceArn": { "Ref": "TopicBFC7AF6E" }
}
},
"Effect": "Allow",
"Principal": { "Service": "sns.amazonaws.com" },
"Resource": {
"Fn::GetAtt": [ "Queue4A7E3555", "Arn" ]
}
}
],
"Version": "2012-10-17"
},
"Queues": [{ "Ref": "Queue4A7E3555" }]
}
},
"TopicBFC7AF6E": {
"Type": "AWS::SNS::Topic",
"Properties": {
"DisplayName": "Some Amazing Topic"
}
},
"TopicQueueSubscription2D098ED4": {
"Type": "AWS::SNS::Subscription",
"Properties": {
"Endpoint": {
"Fn::GetAtt": [ "Queue4A7E3555", "Arn" ]
},
"Protocol": "sqs",
"TopicArn": { "Ref": "TopicBFC7AF6E" }
}
}
}
}

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AWS CDK example
Queue queue = new Queue(this, "Queue", QueueProps.builder()
.withVisibilityTimeoutSec(300)
.build());
Topic topic = new Topic(this, "Topic", TopicProps.builder()
.withDisplayName("Some Amazing Topic")
.build());
topic.subscribeQueue(queue);

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AWS CDK example
{
"Resources": {
"Queue4A7E3555": {
"Type": "AWS::SQS::Queue",
"Properties": { "VisibilityTimeout": 300 }
},
"QueuePolicy25439813": {
"Type": "AWS::SQS::QueuePolicy",
"Properties": {
"PolicyDocument": {
"Statement": [
{
"Action": "sqs:SendMessage",
"Condition": {
"ArnEquals": {
"aws:SourceArn": { "Ref": "TopicBFC7AF6E" }
}
},
"Effect": "Allow",
"Principal": { "Service": "sns.amazonaws.com" },
"Resource": {
"Fn::GetAtt": [ "Queue4A7E3555", "Arn" ]
}
}
],
"Version": "2012-10-17"
},
"Queues": [{ "Ref": "Queue4A7E3555" }]
}
},
"TopicBFC7AF6E": {
"Type": "AWS::SNS::Topic",
"Properties": {
"DisplayName": "Some Amazing Topic"
}
},
"TopicQueueSubscription2D098ED4": {
"Type": "AWS::SNS::Subscription",
"Properties": {
"Endpoint": {
"Fn::GetAtt": [ "Queue4A7E3555", "Arn" ]
},
"Protocol": "sqs",
"TopicArn": { "Ref": "TopicBFC7AF6E" }
}
}
}
}

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AWS Cloud Development Kit (AWS CDK)
Higher level abstractions
Object oriented & extensible
Native IDE support (it’s just code)
Java, Javascript, Typescript, .NET
Open Source
https://github.com/awslabs/aws-cdk
Currently in Developer Preview

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AWS Java ecosystem
Execution
environments

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AWS Java ecosystem

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Performance

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Dependency caching

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Summary

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A project wish list (devops)
Pipeline as code
Infrastructure as code
Isolation
Everything in the same
language as my application
Pipelines are highly available
and performant

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A project wish list (application build)
(Serverless) Performance on
par with a more long lived
JVM workload
All underpinned by a JVM that
is dependable with free long
term support
Functional programming
friendly SDK’s
(Serverless) Great local
development experience
(debugging and IDE support)

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Pet Clinic – Spring Boot example app

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Environment Architecture
This is the simplistic view of what
we would like
A load balancer, some web servers
and a database
AWS Cloud

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Environment Architecture
Things are not quite so simple
when it comes to deployment.
AWS gives you a lot of control
over the wider environment
Can AWS CDK help keep things
simple?
AWS Cloud
VPC
Availability Zone 1 Availability Zone 2 Availability Zone 3
Auto Scaling group

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Pipeline Architecture
Source Stage
Retrieve source from Github
Build Stage
Maven build (mvn package)
Create petclinic.jar
Run CDK to provision or
update environment

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Pipeline Architecture
What do I mean by isolation? Devops Account Prod Account
Non Prod Account
PetClinic Pipeline
PetClinic Staging
PetClinic Prod

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Content links
Amazon Corretto
https://aws.amazon.com/corretto/
AWS Toolkit for IntelliJ
https://aws.amazon.com/intellij
AWS Cloud Development Kit (AWS CDK)
https://github.com/awslabs/aws-cdk
AWS CDK demo + lab
https://github.com/jousby/aws-java-appdev-lab
https://github.com/jousby/aws-buildbox

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Related breakouts
Enhancing your Developer eXperience on AWS
Derek Bingham
Pro tips for builders on AWS
Gabe Hollombe

65. Thank you!
S U M M I T © 2019, Amazon Web Services, Inc. or its affiliates. All rights reserved.
James Ousby
joousby@amazon.com