{"id":1069,"date":"2021-07-23T15:10:45","date_gmt":"2021-07-23T22:10:45","guid":{"rendered":"https:\/\/bullyrooks.com\/?p=1069"},"modified":"2021-07-25T06:53:26","modified_gmt":"2021-07-25T13:53:26","slug":"spring-boot-lambda-implementation","status":"publish","type":"post","link":"https:\/\/bullyrooks.com\/index.php\/2021\/07\/23\/spring-boot-lambda-implementation\/","title":{"rendered":"Spring Boot Lambda Implementation"},"content":{"rendered":"\n

Now we’re going to add some code. I’m going to follow my ports and adapters method of building a DTO and value object that I’ve used previously<\/a>. Yes, its a bit of overkill for this project (especially a hello world example), but if you’re using this course as a springboard to build another project, I think its a good habit to get into. Especially since lambda functional code supplied by spring introduces some code you may not want in your service layer.<\/p>\n\n\n\n

Build the Service Layer<\/h2>\n\n\n\n

create a class in a new service<\/code> package for the service:<\/p>\n\n\n\n

package com.bullyrooks.helloworldlambda.service;\n\nimport com.bullyrooks.helloworldlambda.service.vo.HelloWorld;\nimport org.springframework.stereotype.Component;\n\n@Component\npublic class HelloWorldService {\n\n    public HelloWorld helloWorld(String name) {\n        return HelloWorld.builder()\n                .response(\"Hello, \" + name)\n                .build();\n    }\n}\n<\/code><\/pre>\n\n\n\n
Create a new value object to handle the response in a new package service\/vo<\/code><\/p>\n\n\n\n
package com.bullyrooks.helloworldlambda.service.vo;\n\nimport lombok.AllArgsConstructor;\nimport lombok.Builder;\nimport lombok.Data;\nimport lombok.NoArgsConstructor;\n\n@Data\n@AllArgsConstructor\n@NoArgsConstructor\n@Builder\npublic class HelloWorld {\n    private String response;\n}\n<\/code><\/pre>\n\n\n\n
We’ll need to import some libraries to support the function features, so add these libraries to your pom.xml<\/code><\/p>\n\n\n\n
\t<parent>\r\n\t\t<groupId>org.springframework.boot<\/groupId>\r\n\t\t<artifactId>spring-boot-starter-parent<\/artifactId>\r\n\t\t<version>2.4.5<\/version><\/span>\r\n\t\t<relativePath\/> <!-- lookup parent from repository -->\r\n\t<\/parent>\n...\n\t<properties>\r\n\t\t<java.version>11<\/java.version>\r\n\t\t<aws-lambda-java-events.version>3.1.0<\/aws-lambda-java-events.version>\r\n\t\t<aws-lambda-java-core.version>1.2.0<\/aws-lambda-java-core.version>\r\n\t\t<spring-cloud.version>Hoxton.SR6<\/spring-cloud.version>\r\n\t\t<wrapper.version>1.0.11.RELEASE<\/wrapper.version><\/span>\r\n\t<\/properties>\n\n...\n\n\t<dependencyManagement>\r\n\t\t<dependencies>\r\n\t\t\t<dependency>\r\n\t\t\t\t<groupId>org.springframework.cloud<\/groupId>\r\n\t\t\t\t<artifactId>spring-cloud-dependencies<\/artifactId>\r\n\t\t\t\t<version>${spring-cloud.version}<\/version>\r\n\t\t\t\t<type>pom<\/type>\r\n\t\t\t\t<scope>import<\/scope>\r\n\t\t\t<\/dependency>\r\n\t\t<\/dependencies>\r\n\t<\/dependencyManagement><\/span>\r\n\n...\n\n\t\t<dependency>\r\n\t\t\t<groupId>org.springframework.cloud<\/groupId>\r\n\t\t\t<artifactId>spring-cloud-function-adapter-aws<\/artifactId>\r\n\t\t<\/dependency>\r\n\t\t<dependency>\r\n\t\t\t<groupId>com.amazonaws<\/groupId>\r\n\t\t\t<artifactId>aws-lambda-java-events<\/artifactId>\r\n\t\t\t<version>${aws-lambda-java-events.version}<\/version>\r\n\t\t<\/dependency>\r\n\t\t<dependency>\r\n\t\t\t<groupId>com.amazonaws<\/groupId>\r\n\t\t\t<artifactId>aws-lambda-java-core<\/artifactId>\r\n\t\t\t<version>${aws-lambda-java-core.version}<\/version>\r\n\t\t<\/dependency><\/span>\n\n\n...\n\n\n\t\t\t<plugin>\r\n\t\t\t\t<groupId>org.apache.maven.plugins<\/groupId>\r\n\t\t\t\t<artifactId>maven-jar-plugin<\/artifactId>\r\n\t\t\t\t<version>3.2.0<\/version>\r\n\r\n\t\t\t\t<configuration>\r\n\t\t\t\t\t<archive>\r\n\t\t\t\t\t\t<manifest>\r\n\t\t\t\t\t\t\t<mainClass>com.bullyrooks.helloworldlambda.HelloworldLambdaApplication<\/mainClass>\r\n\t\t\t\t\t\t<\/manifest>\r\n\t\t\t\t\t<\/archive>\r\n\t\t\t\t<\/configuration>\r\n\t\t\t<\/plugin>\r\n\t\t\t<plugin>\r\n\t\t\t\t<groupId>org.apache.maven.plugins<\/groupId>\r\n\t\t\t\t<artifactId>maven-deploy-plugin<\/artifactId>\r\n\t\t\t\t<configuration>\r\n\t\t\t\t\t<skip>true<\/skip>\r\n\t\t\t\t<\/configuration>\r\n\t\t\t<\/plugin>\r\n\t\t\t<plugin>\r\n\t\t\t\t<groupId>org.springframework.boot<\/groupId>\r\n\t\t\t\t<artifactId>spring-boot-maven-plugin<\/artifactId>\r\n\t\t\t\t<dependencies>\r\n\t\t\t\t\t<dependency>\r\n\t\t\t\t\t\t<groupId>org.springframework.boot.experimental<\/groupId>\r\n\t\t\t\t\t\t<artifactId>spring-boot-thin-layout<\/artifactId>\r\n\t\t\t\t\t\t<version>${wrapper.version}<\/version>\r\n\t\t\t\t\t<\/dependency>\r\n\t\t\t\t<\/dependencies>\r\n\t\t\t<\/plugin>\r\n\t\t\t<plugin>\r\n\t\t\t\t<groupId>org.apache.maven.plugins<\/groupId>\r\n\t\t\t\t<artifactId>maven-shade-plugin<\/artifactId>\r\n\t\t\t\t<version>3.2.4<\/version>\r\n\t\t\t\t<configuration>\r\n\t\t\t\t\t<createDependencyReducedPom>false<\/createDependencyReducedPom>\r\n\t\t\t\t\t<shadedArtifactAttached>true<\/shadedArtifactAttached>\r\n\t\t\t\t\t<shadedClassifierName>aws<\/shadedClassifierName>\r\n\t\t\t\t<\/configuration>\r\n\t\t\t\t<executions>\r\n\t\t\t\t\t<execution>\r\n\t\t\t\t\t\t<phase>package<\/phase>\r\n\t\t\t\t\t\t<goals>\r\n\t\t\t\t\t\t\t<goal>shade<\/goal>\r\n\t\t\t\t\t\t<\/goals>\r\n\t\t\t\t\t<\/execution>\r\n\t\t\t\t<\/executions>\r\n\t\t\t<\/plugin>\r\n\t\t<\/plugins>\r\n\t\t<finalName>${project.name}<\/finalName><\/span>\r\n\r\n<\/span><\/code><\/pre>\n\n\n\n
First off, I’m downgrading the version of spring boot parent.  I thought<\/em> I had some trouble with java 11, the spring boot parent and the version of the spring cloud that I was bringing in and this combination worked.  Second, I’m setting up the properties for the versions of the dependencies I’m bringing in.  Next, setting up spring cloud dependency management because I have one spring cloud dependency.  Also, adding a bunch of new dependencies.  <\/p>\n\n\n\n
The plugins need more explanation: <\/p>\n\n\n\n