Introduction

Amazon Simple Queue Service (SQS) is a fully managed message queuing service that enables you to decouple and scale microservices, distributed systems, and serverless applications. SQS eliminates the complexity and overhead associated with managing and operating message-oriented middleware, and empowers developers to focus on differentiating work.

In this lesson, we will learn how to use SQS Message Attributes with AWS CLI. We will cover the basics of SQS Message Attributes, how to create and manage them using the AWS CLI, and how to use them in your applications.

What are SQS Message Attributes?

SQS Message Attributes are key-value pairs that can be attached to an SQS message. They provide additional context and information about the message, and can be used to filter and route messages.

Message Attributes are optional and can be used to store metadata about the message, such as the sender, the message type, or the message priority. They can also be used to store application-specific data, such as a customer ID or a product ID.

Creating and Managing SQS Message Attributes with AWS CLI

The AWS CLI provides a set of commands for creating and managing SQS Message Attributes. In this section, we will look at how to use the AWS CLI to create and manage SQS Message Attributes.

Creating an SQS Message Attribute

To create an SQS Message Attribute, you can use the aws sqs create-message-attribute command. This command takes a message attribute name and value as parameters.

For example, to create a message attribute called sender with the value John Doe, you can use the following command:

aws sqs create-message-attribute --queue-url <queue-url> --message-attribute Name=sender,Value=John Doe

Updating an SQS Message Attribute

To update an existing SQS Message Attribute, you can use the aws sqs set-message-attribute command. This command takes a message attribute name and value as parameters.

For example, to update the sender message attribute to Jane Doe, you can use the following command:

aws sqs set-message-attribute --queue-url <queue-url> --message-attribute Name=sender,Value=Jane Doe

Deleting an SQS Message Attribute

To delete an existing SQS Message Attribute, you can use the aws sqs delete-message-attribute command. This command takes a message attribute name as a parameter.

For example, to delete the sender message attribute, you can use the following command:

aws sqs delete-message-attribute --queue-url <queue-url> --message-attribute Name=sender

Using SQS Message Attributes in Applications

Now that we have seen how to create and manage SQS Message Attributes using the AWS CLI, let’s look at how to use them in applications.

SQS Message Attributes can be used to filter and route messages. For example, you can use the sender message attribute to route messages from a specific sender to a specific queue.

You can also use SQS Message Attributes to store application-specific data. For example, you can use the customer_id message attribute to store the customer ID associated with a message.

Conclusion

In this lesson, we have learned how to use SQS Message Attributes with AWS CLI. We have seen how to create and manage SQS Message Attributes using the AWS CLI, and how to use them in applications. We have also seen how SQS Message Attributes can be used to filter and route messages, and to store application-specific data.