05. Application Integration

AWS Step Functions

AWS Step Functions lets you coordinate multiple AWS services into serverless workflows so you can build and update apps quickly.
Using Step Functions, you can design and run workflows that stitch together services such as AWS Lambda and Amazon ECS into feature-rich applications.

Amazon MQ is a managed message broker service for Apache ActiveMQ that makes it easy to set up and operate message brokers in the cloud.
Message brokers allow different software systems–often using different programming languages, and on different platforms–to communicate and exchange information.

SQS is a way to de-couple your infrastructure.
SQS is apull based service.
Messages are kept in queue from 1 minute to 14 days, defult retention period is 4 days.
Amazon Simple Queue Service (Amazon SQS) is a fully managed message queuing service that enables you to decouple and scale microservices, distributed systems, and serverless applications.
Using SQS, you can send, store, and receive messages between software components at any volume, without losing messages or requiring other services to be available.
SQS offers two types of message queues.

Standard queues offer maximum throughput, best-effort ordering, and at-least-once delivery.
SQS FIFO queues are designed to guarantee that messages are processed exactly once, in the exact order that they are sent.

Amazon Simple Notification Service (Amazon SNS) is a highly available, durable, secure, fully managed pub/sub messaging service that enables you to decouple microservices, distributed systems, and serverless applications.
Amazon SNS provides topics for high-throughput, push-based, many-to-many messaging.
Using Amazon SNS topics, your publisher systems can fan out messages to a large number of subscriber endpoints for parallel processing,

Amazon Simple Workflow (Amazon SWF) helps developers build, run, and scale background jobs that have parallel or sequential steps