Hello Azure Spring Cloud!

This project shows how to deploy a Spring Boot app to Azure Spring Cloud, and how to bind it to a managed Azure Redis Cache instance using Spring Data Redis.

How to use it?

Compile this app using a JDK 11+:

$ ./mvnw clean package

As you can see, the app source code is only using Spring Boot and Spring Data Redis: there's no dependency on Azure.

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

@ConfigurationProperties("app")
@ConstructorBinding
@Getter
@RequiredArgsConstructor
class AppProperties {
   private final String message;
}

@RestController
@RequiredArgsConstructor
class HelloController {
   private final AppProperties props;

   @GetMapping(value = "/", produces = MediaType.TEXT_PLAIN_VALUE)
   String hello() {
       return props.getMessage();
   }
}

@RestController
@RequiredArgsConstructor
class CounterController {
   private final RedisAtomicInteger counter;

   @GetMapping("/inc")
   Map<String, Object> incrementCounter() {
       final var value = counter.incrementAndGet();
       return Map.of("counter", value);
   }
}

@Configuration
class RedisConfig {
   @Bean
   RedisAtomicInteger counter(RedisConnectionFactory rcf) {
       return new RedisAtomicInteger("counter", rcf);
   }
}

If you never used Azure Spring Cloud before, you need to create a cluster first. Create a new Azure Spring Cloud service using the Management console:

Enter cluster details:

Wait for the cluster to be created, then create a new app hello:

Make sure you select Java 11 as the Java environment.

Go the hello app page:

Let's bind this app to an Azure Redis Cache instance:

Almost done!

Make sure you have the Azure Spring Cloud CLI installed on your workstation.

Now it's time to deploy your app to Azure Spring Cloud. Use this command to push your JAR to the Cloud:

$ az spring-cloud app deploy -n hello --jar-path target/hello-azure-spring-cloud.jar

Go back to the hello app page: get the Test Endpoint URL.

Hit this URL:

Check that your app is bound to the Redis instance using the endpoint /inc to increment a Redis integer value:

And voilà!

Contribute

Contributions are always welcome!

Feel free to open issues & send PR.

License

Copyright © 2019 Pivotal Software, Inc.

This project is licensed under the Apache Software License version 2.0.