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java 17 currently too big to unzip as a layer
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‎.gitignore

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# virtual machine crash logs, see http://www.java.com/en/download/help/error_hotspot.xml
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hs_err_pid*
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/jdk-17/
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/.idea/
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/example/software/ExampleFunction/target/
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*.iml

‎bootstrap

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#!/bin/sh
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#export _JAVA_OPTIONS="-XX:+TieredCompilation -XX:TieredStopAtLevel=1"
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/opt/jdk-17/bin/java -cp aws-lambda-java-runtime-interface-client-1.1.0.jar com.amazonaws.services.lambda.runtime.api.client.AWSLambda "$_HANDLER"

‎example/infrastructure/.gitignore

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.classpath.txt
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target
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.classpath
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.project
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.idea
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.settings
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.vscode
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*.iml
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# CDK asset staging directory
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.cdk.staging
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cdk.out
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outputs.json
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‎example/infrastructure/cdk.json

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{
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"app": "mvn -e -q compile exec:java",
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"context": {
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"@aws-cdk/core:enableStackNameDuplicates": "true",
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"aws-cdk:enableDiffNoFail": "true",
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"@aws-cdk/core:stackRelativeExports": "true",
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"@aws-cdk/aws-ecr-assets:dockerIgnoreSupport": true,
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"@aws-cdk/aws-secretsmanager:parseOwnedSecretName": true,
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"@aws-cdk/aws-kms:defaultKeyPolicies": true,
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"@aws-cdk/aws-s3:grantWriteWithoutAcl": true
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}
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}

‎example/infrastructure/loadtest.yml

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config:
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phases:
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- duration: 300
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arrivalRate: 120
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scenarios:
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- flow:
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- get:
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url: "{{ url }}"

‎example/infrastructure/pom.xml

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<?xml version="1.0" encoding="UTF-8"?>
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<project xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd"
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xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance">
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<modelVersion>4.0.0</modelVersion>
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<groupId>example</groupId>
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<artifactId>infrastructure</artifactId>
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<version>0.1</version>
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<properties>
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<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
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<cdk.version>1.87.1</cdk.version>
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<junit.version>5.7.0</junit.version>
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</properties>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.8.1</version>
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<configuration>
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<source>9</source>
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<target>9</target>
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</configuration>
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</plugin>
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<plugin>
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<groupId>org.codehaus.mojo</groupId>
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<artifactId>exec-maven-plugin</artifactId>
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<version>3.0.0</version>
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<configuration>
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<mainClass>example.InfrastructureApp</mainClass>
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</configuration>
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</plugin>
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</plugins>
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</build>
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<dependencies>
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<!-- AWS Cloud Development Kit -->
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<dependency>
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<groupId>software.amazon.awscdk</groupId>
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<artifactId>core</artifactId>
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<version>${cdk.version}</version>
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</dependency>
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<dependency>
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<groupId>software.amazon.awscdk</groupId>
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<artifactId>lambda</artifactId>
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<version>${cdk.version}</version>
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</dependency>
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<dependency>
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<groupId>software.amazon.awscdk</groupId>
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<artifactId>apigatewayv2</artifactId>
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<version>${cdk.version}</version>
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</dependency>
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<dependency>
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<groupId>software.amazon.awscdk</groupId>
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<artifactId>apigatewayv2-integrations</artifactId>
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<version>${cdk.version}</version>
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</dependency>
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<dependency>
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<groupId>software.amazon.awscdk</groupId>
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<artifactId>dynamodb</artifactId>
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<version>${cdk.version}</version>
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</dependency>
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</dependencies>
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</project>

‎example/infrastructure/src/main/java/example/InfrastructureApp.java

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package example;
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import software.amazon.awscdk.core.App;
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public class InfrastructureApp {
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public static void main(final String[] args) {
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App app = new App();
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new InfrastructureStack(app, "InfrastructureStack");
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app.synth();
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}
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}

‎example/infrastructure/src/main/java/example/InfrastructureStack.java

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package example;
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import software.amazon.awscdk.core.CfnOutput;
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import software.amazon.awscdk.core.CfnOutputProps;
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import software.amazon.awscdk.core.Construct;
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import software.amazon.awscdk.core.Duration;
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import software.amazon.awscdk.core.Stack;
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import software.amazon.awscdk.core.StackProps;
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import software.amazon.awscdk.services.apigatewayv2.AddRoutesOptions;
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import software.amazon.awscdk.services.apigatewayv2.HttpApi;
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import software.amazon.awscdk.services.apigatewayv2.HttpApiProps;
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import software.amazon.awscdk.services.apigatewayv2.HttpMethod;
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import software.amazon.awscdk.services.apigatewayv2.PayloadFormatVersion;
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import software.amazon.awscdk.services.apigatewayv2.integrations.LambdaProxyIntegration;
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import software.amazon.awscdk.services.apigatewayv2.integrations.LambdaProxyIntegrationProps;
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import software.amazon.awscdk.services.dynamodb.Attribute;
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import software.amazon.awscdk.services.dynamodb.AttributeType;
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import software.amazon.awscdk.services.dynamodb.BillingMode;
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import software.amazon.awscdk.services.dynamodb.Table;
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import software.amazon.awscdk.services.dynamodb.TableProps;
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import software.amazon.awscdk.services.lambda.Code;
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import software.amazon.awscdk.services.lambda.Function;
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import software.amazon.awscdk.services.lambda.FunctionProps;
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import software.amazon.awscdk.services.lambda.LayerVersion;
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import software.amazon.awscdk.services.lambda.LayerVersionProps;
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import software.amazon.awscdk.services.lambda.Runtime;
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import software.amazon.awscdk.services.logs.RetentionDays;
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import java.util.Arrays;
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import java.util.HashMap;
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import java.util.Map;
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import static java.util.Collections.singletonList;
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public class InfrastructureStack extends Stack {
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public InfrastructureStack(final Construct scope, final String id) {
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this(scope, id, null);
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}
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public InfrastructureStack(final Construct scope, final String id, final StackProps props) {
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super(scope, id, props);
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Table exampleTable = new Table(this, "ExampleTable", TableProps.builder()
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.partitionKey(Attribute.builder()
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.type(AttributeType.STRING)
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.name("id").build())
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.billingMode(BillingMode.PAY_PER_REQUEST)
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.build());
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LayerVersion java17layer = new LayerVersion(this, "Java17Layer", LayerVersionProps.builder()
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.layerVersionName("Java17Layer")
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.description("Java 17")
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.compatibleRuntimes(Arrays.asList(Runtime.PROVIDED_AL2))
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.code(Code.fromAsset("../../java17layer.zip"))
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.build());
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Function exampleWithLayer = new Function(this, "ExampleWithLayer", FunctionProps.builder()
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.functionName("example-with-layer")
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.description("example-with-layer")
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.handler("example.ExampleDynamoDbHandler::handleRequest")
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.runtime(Runtime.PROVIDED_AL2)
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.code(Code.fromAsset("../software/ExampleFunction/target/example.jar"))
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.memorySize(512)
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.environment(mapOf("TABLE_NAME", exampleTable.getTableName()))
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.timeout(Duration.seconds(20))
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.logRetention(RetentionDays.ONE_WEEK)
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.layers(singletonList(java17layer))
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.build());
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exampleTable.grantWriteData(exampleWithLayer);
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HttpApi httpApi = new HttpApi(this, "ExampleApi", HttpApiProps.builder()
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.apiName("ExampleApi")
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.build());
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httpApi.addRoutes(AddRoutesOptions.builder()
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.path("/with")
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.methods(singletonList(HttpMethod.GET))
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.integration(new LambdaProxyIntegration(LambdaProxyIntegrationProps.builder()
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.handler(exampleWithLayer)
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.payloadFormatVersion(PayloadFormatVersion.VERSION_2_0)
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.build()))
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.build());
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new CfnOutput(this, "api-endpoint", CfnOutputProps.builder()
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.value(httpApi.getApiEndpoint())
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.build());
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}
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private Map<String, String> mapOf(String... keyValues) {
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Map<String, String> map = new HashMap<>(keyValues.length/2);
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for (int i = 0; i < keyValues.length; i++) {
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if(i % 2 == 0) {
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map.put(keyValues[i], keyValues[i + 1]);
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}
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}
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return map;
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}
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}

‎example/software/ExampleFunction/pom.xml

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<project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
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xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/maven-v4_0_0.xsd">
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<modelVersion>4.0.0</modelVersion>
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<groupId>example</groupId>
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<artifactId>example</artifactId>
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<version>1.0</version>
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<packaging>jar</packaging>
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<name>A sample Lambda function created for SAM CLI.</name>
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<properties>
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<aws.java.sdk.version>2.16.1</aws.java.sdk.version>
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</properties>
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<dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>software.amazon.awssdk</groupId>
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<artifactId>bom</artifactId>
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<version>${aws.java.sdk.version}</version>
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<type>pom</type>
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<scope>import</scope>
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</dependency>
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</dependencies>
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</dependencyManagement>
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<dependencies>
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<dependency>
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<groupId>com.amazonaws</groupId>
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<artifactId>aws-lambda-java-core</artifactId>
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<version>1.2.1</version>
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</dependency>
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<dependency>
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<groupId>com.amazonaws</groupId>
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<artifactId>aws-lambda-java-events</artifactId>
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<version>3.6.0</version>
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</dependency>
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<dependency>
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<groupId>software.amazon.awssdk</groupId>
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<artifactId>dynamodb</artifactId>
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<exclusions>
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<exclusion>
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<groupId>software.amazon.awssdk</groupId>
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<artifactId>netty-nio-client</artifactId>
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</exclusion>
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<exclusion>
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<groupId>software.amazon.awssdk</groupId>
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<artifactId>apache-client</artifactId>
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</exclusion>
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</exclusions>
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</dependency>
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<dependency>
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<groupId>software.amazon.awssdk</groupId>
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<artifactId>url-connection-client</artifactId>
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</dependency>
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</dependencies>
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<build>
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<plugins>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-shade-plugin</artifactId>
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<version>3.2.4</version>
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<configuration>
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<finalName>example</finalName>
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</configuration>
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<executions>
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<execution>
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<phase>package</phase>
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<goals>
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<goal>shade</goal>
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</goals>
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</execution>
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</executions>
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</plugin>
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<plugin>
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<groupId>org.apache.maven.plugins</groupId>
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<artifactId>maven-compiler-plugin</artifactId>
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<version>3.8.1</version>
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<configuration>
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<source>1.8</source>
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<target>1.8</target>
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</configuration>
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</plugin>
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</plugins>
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</build>
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</project>

‎example/software/ExampleFunction/src/main/java/example/ExampleDynamoDbHandler.java

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package example;
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import com.amazonaws.services.lambda.runtime.Context;
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import com.amazonaws.services.lambda.runtime.RequestHandler;
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import com.amazonaws.services.lambda.runtime.events.APIGatewayProxyRequestEvent;
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import com.amazonaws.services.lambda.runtime.events.APIGatewayProxyResponseEvent;
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import software.amazon.awssdk.auth.credentials.EnvironmentVariableCredentialsProvider;
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import software.amazon.awssdk.core.SdkSystemSetting;
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import software.amazon.awssdk.http.urlconnection.UrlConnectionHttpClient;
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import software.amazon.awssdk.regions.Region;
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import software.amazon.awssdk.services.dynamodb.DynamoDbClient;
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import software.amazon.awssdk.services.dynamodb.model.AttributeValue;
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import software.amazon.awssdk.services.dynamodb.model.DynamoDbException;
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import software.amazon.awssdk.services.dynamodb.model.PutItemRequest;
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import java.util.HashMap;
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import java.util.Map;
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import java.util.UUID;
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import java.util.stream.Collectors;
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public class ExampleDynamoDbHandler implements RequestHandler<APIGatewayProxyRequestEvent, APIGatewayProxyResponseEvent> {
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private static final String TABLE_NAME = System.getenv("TABLE_NAME");
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private final DynamoDbClient dynamoDbClient = DynamoDbClient.builder()
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.credentialsProvider(EnvironmentVariableCredentialsProvider.create())
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.region(Region.of(System.getenv(SdkSystemSetting.AWS_REGION.environmentVariable())))
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.httpClientBuilder(UrlConnectionHttpClient.builder())
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.build();
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public APIGatewayProxyResponseEvent handleRequest(final APIGatewayProxyRequestEvent input, final Context context) {
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APIGatewayProxyResponseEvent response = new APIGatewayProxyResponseEvent();
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context.getLogger().log(input.toString());
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try {
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Map<String, AttributeValue> itemAttributes = new HashMap<>();
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itemAttributes.put("id", AttributeValue.builder().s(context.getAwsRequestId()).build());
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itemAttributes.put("value",
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AttributeValue.builder().s(
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input.getHeaders().entrySet()
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.stream()
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.map(a -> a.getKey()+"="+a.getValue())
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.collect(Collectors.joining())
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).build()
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);
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dynamoDbClient.putItem(PutItemRequest.builder()
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.tableName(TABLE_NAME)
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.item(itemAttributes)
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.build());
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return response.withBody("successful").withStatusCode(200);
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} catch (DynamoDbException e) {
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context.getLogger().log(e.getMessage());
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return response.withBody("error").withStatusCode(500);
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}
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}
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}

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