AWS SDK for Java, version 2.0 - Albany NY - January 18 2018

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Sean Sullivan January 18, 2018 AWS User Group Albany NY AWS SDK for Java version 2.0

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Thank you CommerceHub

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software engineer 21 years on the JVM Portland Oregon back ofﬁce systems Hudson’s Bay Company About me

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Agenda Hudson’s Bay Company SDK for Java • version 1.x • version 2.x Scala and AWS

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https://en.wikipedia.org/wiki/Hudson%27s_Bay_Company

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Toronto NYC Albany

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saksﬁfthavenue.com saksoff5th.com lordandtaylor.com gilt.com thebay.com

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gilt.com

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gilt.com

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Web Checkout Android Checkout iPhone Checkout Checkout service

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AWS SDK for Java

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SDK v2 announced June 2017 @awsforjava

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“Under the hood, we use an HTTP client built on top of Netty to make the non- blocking HTTP call” “ﬁrst class support for non-blocking I/O in our async clients” source: AWS Developer Blog

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import java.util.concurrent.CompletableFuture; DynamoDBAsyncClient client = DynamoDBAsyncClient.builder() .region(Region.US_WEST_2) .build(); CompletableFuture response = client.listTables(ListTablesRequest.builder().build()); CompletableFuture> tableNames = response.thenApply(ListTablesResponse::tableNames); tableNames.whenComplete((tables, err) -> { if (tables != null) { tables.forEach(System.out::println); } else { err.printStackTrace(); } }); SDK v2

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Github projects aws-sdk-java aws-sdk-java-v2

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SDK v2 Developer Preview

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Pull Request

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SDK v2 Maven artifacts

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https://search.maven.org/

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com.amazonaws aws-java-sdk-dynamodb 1.11.267 Maven dependencies SDK v1 software.amazon.awssdk dynamodb 2.0.0-preview7 SDK v2

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import com.amazonaws.services.cloudwatch.AmazonCloudWatchClient; import com.amazonaws.services.cloudwatch.AmazonCloudWatchClientBuilder; import com.amazonaws.services.cloudwatch.model.MetricDatum; import com.amazonaws.services.cloudwatch.model.PutMetricDataRequest; Java packages SDK v1 import software.amazon.awssdk.services.cloudwatch.CloudWatchAsyncClient; import software.amazon.awssdk.services.cloudwatch.model.MetricDatum; import software.amazon.awssdk.services.cloudwatch.model.PutMetricDataRequest; SDK v2

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distinct Maven artifact names distinct Java package names SDK v2 and SDK v1 can co-exist in a Java application SDK v1 jar SDK v2 jar

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SDK v2 programming API • Immutable clients and models • Enhanced pagination • Smart conﬁguration merging • Forward-compatible enums • Streaming operations as ﬁrst-class concepts

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AWS SDK v2 in a Scala application?

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val awsSdkVersion = "2.0.0-preview-7" "org.scala-lang.modules" %% "scala-java8-compat" % "0.8.0", "software.amazon.awssdk" % "cloudwatch" % awsSdkVersion, "software.amazon.awssdk" % "dynamodb" % awsSdkVersion build.sbt

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import scala.compat.java8.FutureConverters._ import scala.collection.JavaConverters._ Foo.scala

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FutureConverters?

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java.util.concurrent.CompletableFuture scala.concurrent.Future

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FutureConverters.scala

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Gilt’s AWS CloudWatch Scala library

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“A tiny Scala wrapper around AWS CloudWatch Java client”

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https://github.com/gilt/gfc-aws-cloudwatch

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how to migrate gfc-aws-cloudwatch from SDK v1 to SDK v2 ?

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https://github.com/ gilt/gfc-aws- cloudwatch/pull/8/ ﬁles

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Conclusion SDK v1 — production ready SDK v2 — coming soon github.com/aws twitter.com/awsforjava

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The end

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Bonus material

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“Developing Applications on AWS in the JVM” AWS re:Invent 2017

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https://www.slideshare.net/AmazonWebServices/ dev205developing-applications-on-aws-in-the-jvm