Use a single configuration class

Oct 13, 2025 by pinkandtrash.com 5 views

Introduction

In this article, we will explore the process of setting up an SQS listener with multiple IAM users in a Spring Boot project. We will discuss the challenges and solutions involved in configuring multiple SQS queues, each in a separate AWS account with a separate IAM user. By the end of this article, you will have a clear understanding of how to implement an SQS listener with multiple IAM users in your Spring Boot project.

Problem Statement

You have a Spring Boot project with two separate SQS queues, each in a separate AWS account with a separate IAM user. You want to configure an SQS listener to listen to messages from both queues, but you are not sure how to handle the multiple IAM users and AWS accounts.

Solution Overview

To solve this problem, we will use the following approach:

Create two separate configuration classes, one for each SQS queue, to configure the SqsAsyncClient.
Use the @Configuration annotation to enable the configuration classes.
Use the @Bean annotation to create a bean for the SqsAsyncClient.
Use the @Autowired annotation to inject the SqsAsyncClient into the SQS listener.
Use the @EventListener annotation to listen to messages from both SQS queues.

Step 1: Create Separate Configuration Classes

First, we need to create two separate configuration classes, one for each SQS queue. We will use the @Configuration annotation to enable the configuration classes.

@Configuration
public class SqsConfig1 {
@Value(&quot;${aws.accessKey1}&quot;)
private String accessKey;

@Value(&quot;${aws.secretKey1}&quot;)
private String secretKey;

@Value(&quot;${aws.region1}&quot;)
private String region;

@Bean
public SqsAsyncClient sqsAsyncClient() {
    return SqsAsyncClient.builder()
            .credentialsProvider(new DefaultCredentialsProvider(accessKey, secretKey))
            .region(Region.of(region))
            .build();
}

}

@Configuration
public class SqsConfig2 {
    
    @Value("${aws.accessKey2}")
    private String accessKey;
    
    @Value("${aws.secretKey2}")
    private String secretKey;
    
    @Value("${aws.region2}")
    private String region;
    
    @Bean
    public SqsAsyncClient sqsAsyncClient() {
        return SqsAsyncClient.builder()
                .credentialsProvider(new DefaultCredentialsProvider(accessKey, secretKey))
                .region(Region.of(region))
                .build();
    }
}

Step 2: Enable Configuration Classes

Next, we need to enable the configuration classes using the @EnableConfigurationProperties annotation.

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

}

Step 3: Create SQS Listener

Now, we need to create an SQS listener to listen to messages from both SQS queues. We will use the @EventListener annotation to listen to messages from both queues.

@Component
public class SqsListener {
@Autowired
private SqsAsyncClient sqsAsyncClient1;

@Autowired
private SqsAsyncClient sqsAsyncClient2;

@EventListener
public void listenToQueue1(Message message) {
    // Process message from queue 1
}

@EventListener
public void listenToQueue2(Message message) {
    // Process message from queue 2
}

}

Step 4: Configure IAM Users

Finally, we need to configure the IAM users for both SQS queues. We will create two separate IAM users, one for each SQS queue, and assign the necessary permissions to each user.

Conclusion

In this article, we discussed the process of setting up an SQS listener with multiple IAM users in a Spring Boot project. We created two separate configuration classes, one for each SQS queue, to configure the SqsAsyncClient. We used the @Configuration annotation to enable the configuration classes and the @Bean annotation to create a bean for the SqsAsyncClient. We used the @Autowired annotation to inject the SqsAsyncClient into the SQS listener and the @EventListener annotation to listen to messages from both SQS queues. We also configured the IAM users for both SQS queues and assigned the necessary permissions to each user.

Best Practices

Here are some best practices to keep in mind when setting up an SQS listener with multiple IAM users:

Use separate configuration classes for each SQS queue to keep the configuration separate and organized.
Use the @Configuration annotation to enable the configuration classes and the @Bean annotation to create a bean for the SqsAsyncClient.
Use the @Autowired annotation to inject the SqsAsyncClient into the SQS listener and the @EventListener annotation to listen to messages from both SQS queues.
Configure the IAM users for both SQS queues and assign the necessary permissions to each user.
Use environment variables to store sensitive information such as access keys and secret keys.

Common Issues

Here are some common issues that you may encounter when setting up an SQS listener with multiple IAM users:

Invalid credentials: Make sure that the access keys and secret keys are correct and that the IAM users have the necessary permissions.
Missing dependencies: Make sure that the necessary dependencies are included in the project.
Configuration issues: Make sure that the configuration classes are enabled and that the beans are created correctly.
Listener issues: Make sure that the SQS listener is configured correctly and that the messages are being processed correctly.

Future Improvements

Here are some future improvements that you can make to the SQS listener with multiple IAM users:

Use a single configuration class: Instead of using separate configuration classes for each SQS queue, you can use a single configuration class to configure all the SQS queues.
Use a single SQS listener: Instead of using separate SQS listeners for each SQS queue, you can use a single SQS listener to listen to messages from all the SQS queues.
Use a message broker: Instead of using SQS directly, you can use a message broker such as Apache Kafka or RabbitMQ to handle the messages.
Use a cloud-native solution: Instead of using a traditional SQS listener, you can use a cloud-native solution such as AWS Lambda or AWS Fargate to handle the messages.
SQS Listener with Multiple IAM Users: Q&A =============================================

Q: What is the main challenge in setting up an SQS listener with multiple IAM users?

A: The main challenge in setting up an SQS listener with multiple IAM users is handling the multiple IAM users and AWS accounts. Each SQS queue is in a separate AWS account with a separate IAM user, which makes it difficult to configure the SQS listener to listen to messages from both queues.

Q: How do I configure the SQS listener to listen to messages from both SQS queues?

A: To configure the SQS listener to listen to messages from both SQS queues, you need to create two separate configuration classes, one for each SQS queue, to configure the SqsAsyncClient. You then use the @Autowired annotation to inject the SqsAsyncClient into the SQS listener and the @EventListener annotation to listen to messages from both SQS queues.

Q: What is the difference between the `@Configuration` annotation and the `@Bean` annotation?

A: The @Configuration annotation is used to enable the configuration classes, while the @Bean annotation is used to create a bean for the SqsAsyncClient. The @Bean annotation is used to create a bean that can be injected into other classes, while the @Configuration annotation is used to enable the configuration classes.

Q: How do I handle the multiple IAM users and AWS accounts?

A: To handle the multiple IAM users and AWS accounts, you need to create two separate IAM users, one for each SQS queue, and assign the necessary permissions to each user. You then use the @Value annotation to inject the access keys and secret keys into the configuration classes.

Q: What are the best practices for setting up an SQS listener with multiple IAM users?

A: The best practices for setting up an SQS listener with multiple IAM users include:

Using separate configuration classes for each SQS queue to keep the configuration separate and organized.
Using the @Configuration annotation to enable the configuration classes and the @Bean annotation to create a bean for the SqsAsyncClient.
Using the @Autowired annotation to inject the SqsAsyncClient into the SQS listener and the @EventListener annotation to listen to messages from both SQS queues.
Configuring the IAM users for both SQS queues and assigning the necessary permissions to each user.
Using environment variables to store sensitive information such as access keys and secret keys.

Q: What are the common issues that I may encounter when setting up an SQS listener with multiple IAM users?

A: The common issues that you may encounter when setting up an SQS listener with multiple IAM users include:

Invalid credentials: Make sure that the access keys and secret keys are correct and that the IAM users have the necessary permissions.
Missing dependencies: Make sure that the necessary dependencies are included in the project.
Configuration issues: Make sure that the configuration classes are enabled and that the beans are created correctly.
Listener issues: Make sure that the SQS listener is configured correctly and that the messages are being processed correctly.

Q: How do I troubleshoot issues with the SQS listener?

A: To troubleshoot issues with the SQS listener, you can use the following steps:

Check the logs for any errors or exceptions.
Verify that the configuration classes are enabled and that the beans are created correctly.
Verify that the IAM users have the necessary permissions and that the access keys and secret keys are correct.
Verify that the SQS listener is configured correctly and that the messages are being processed correctly.

Q: Can I use a single SQS listener to listen to messages from all the SQS queues?

A: Yes, you can use a single SQS listener to listen to messages from all the SQS queues. However, you need to configure the SQS listener to listen to messages from all the SQS queues and handle the messages correctly.

Q: Can I use a message broker to handle the messages?

A: Yes, you can use a message broker such as Apache Kafka or RabbitMQ to handle the messages. This can help to decouple the SQS listener from the SQS queues and make the system more scalable and fault-tolerant.

Q: Can I use a cloud-native solution to handle the messages?

A: Yes, you can use a cloud-native solution such as AWS Lambda or AWS Fargate to handle the messages. This can help to decouple the SQS listener from the SQS queues and make the system more scalable and fault-tolerant.