Cloud Function #WIP#

https://github.com/spring-boot-tutorials/cloud-function

TODO integrate with AWS: https://www.baeldung.com/spring-cloud-function#spring_cloud_function_on_aws

Create Initial Code Base

Go to https://start.spring.io/
Add the following dependencies:
- spring-boot-starter-web
- spring-cloud-function-web
Click Generate

Dependencies

Dependencies used in pom.xml:

<dependency>
    <groupId>org.springframework.boot</groupId>
    <artifactId>spring-boot-starter-web</artifactId>
</dependency>
<dependency>
    <groupId>org.springframework.cloud</groupId>
    <artifactId>spring-cloud-function-web</artifactId>
</dependency>

Properties

Add the following properties into src/main/resources/application.yaml:

spring.cloud.function.scan.packages=com.example.cloud_function.functions

Configuration

Modify src/main/java/com/example/cloud_function/DefaultConfiguration.java:

@Configuration
public class DefaultConfiguration {

    // curl localhost:8080/reverseString -H "Content-Type: text/plain" -d "Hello, World"
    @Bean
    public Function<String, String> reverseString() {
        return value -> new StringBuilder(value).reverse().toString();
    }
}

Run Spring Application

Open terminal at project root and execute the following:

mvn spring-boot:run

Verify

Execute in terminal

curl localhost:8080/reverseString -H "Content-Type: text/plain" -d "Hello, World"