AWS Lambda

@SpringBootApplication
public class FunctionConfiguration {

	public static void main(String[] args) {
		SpringApplication.run(FunctionConfiguration.class, args);
	}

	@Bean
	public Function<String, String> uppercase() {
		return value -> value.toUpperCase();
	}

    @Bean
	public Function<String, String> lowercase() {
		return value -> value.toLowerCase();
	}
}

AWSTemplateFormatVersion: '2010-09-09'
Transform: AWS::Serverless-2016-10-31

Resources:
  MyUpperCaseLambda:
    Type: AWS::Serverless::Function
    Properties:
      Handler: org.springframework.cloud.function.adapter.aws.FunctionInvoker
      Runtime: java21
      MemorySize: 512
      CodeUri: target/function-sample-aws-0.0.1-SNAPSHOT-aws.jar
      Environment:
        Variables:
          spring_cloud_function_definition: uppercase

  MyLowerCaseLambda:
    Type: AWS::Serverless::Function
    Properties:
      Handler: org.springframework.cloud.function.adapter.aws.FunctionInvoker
      Runtime: java21
      MemorySize: 512
      CodeUri: target/function-sample-aws-0.0.1-SNAPSHOT-aws.jar
      Environment:
        Variables:
          spring_cloud_function_definition: lowercase

<dependencies>
	<dependency>
		<groupId>org.springframework.cloud</groupId>
		<artifactId>spring-cloud-function-adapter-aws</artifactId>
	</dependency>
</dependencies>

<plugin>
	<groupId>org.springframework.boot</groupId>
	<artifactId>spring-boot-maven-plugin</artifactId>
	<dependencies>
		<dependency>
			<groupId>org.springframework.boot.experimental</groupId>
			<artifactId>spring-boot-thin-layout</artifactId>
			<version>${wrapper.version}</version>
		</dependency>
	</dependencies>
</plugin>

dependencies {
	compile("org.springframework.cloud:spring-cloud-function-adapter-aws:${version}")
}

plugins {
	id 'java'
	id 'org.springframework.boot' version '3.4.2'
	id 'io.spring.dependency-management' version '1.1.3'
	id 'com.github.johnrengelman.shadow' version '8.1.1'
	id 'maven-publish'
	id 'org.springframework.boot.experimental.thin-launcher' version "1.0.31.RELEASE"
}

group = 'com.example'
version = '0.0.1-SNAPSHOT'

java {
	sourceCompatibility = '17'
}

repositories {
	mavenCentral()
	mavenLocal()
	maven { url 'https://repo.spring.io/milestone' }
}

ext {
	set('springCloudVersion', "2024.0.0")
}

assemble.dependsOn = [thinJar, shadowJar]

publishing {
	publications {
		maven(MavenPublication) {
			from components.java
			versionMapping {
				usage('java-api') {
					fromResolutionOf('runtimeClasspath')
				}
				usage('java-runtime') {
					fromResolutionResult()
				}
			}
		}
	}
}

shadowJar.mustRunAfter thinJar


import com.github.jengelman.gradle.plugins.shadow.transformers.*

shadowJar {
	archiveClassifier = 'aws'
	manifest {
    	inheritFrom(project.tasks.thinJar.manifest)
  	}
  	// Required for Spring
	mergeServiceFiles()
	append 'META-INF/spring.handlers'
	append 'META-INF/spring.schemas'
	append 'META-INF/spring.tooling'
	append 'META-INF/spring/org.springframework.boot.autoconfigure.AutoConfiguration.imports'
	append 'META-INF/spring/org.springframework.boot.actuate.autoconfigure.web.ManagementContextConfiguration.imports'
	transform(PropertiesFileTransformer) {
		paths = ['META-INF/spring.factories']
		mergeStrategy = "append"
	}
}

dependencies {
	implementation 'org.springframework.boot:spring-boot-starter'
	implementation 'org.springframework.cloud:spring-cloud-function-adapter-aws'
	implementation 'org.springframework.cloud:spring-cloud-function-context'
	testImplementation 'org.springframework.boot:spring-boot-starter-test'
}

dependencyManagement {
	imports {
		mavenBom "org.springframework.cloud:spring-cloud-dependencies:${springCloudVersion}"
	}
}

tasks.named('test') {
	useJUnitPlatform()
}