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AWS Application Integration Services

The Application Integration category hosts a suite of services that would help you manage your application functions and provide you a means to decouple them.  It also contains services that can manage message handling, distribution and queueing.

Below are the list of current services under this category.

Step Functions      
       - AWS Step Functions makes it easy to coordinate the components of distributed applications as a series of steps in a visual workflow.  You can quickly build and run state machines to execute the steps of your application in a reliable and scalable fashion. 
       - It is a way of visualizing what is going on in your environment.

Amazon MQ
       - Amazon MQ is a managed message broker service for Apache ActiveMQ that makes it easy to migrate to a message broker in the cloud.  A message broker allows software applications and components to communicate using various programming languages, operating systems, and formal messaging protocols.

Simple Notification Service      
       -  Amazon Simple Notification Service (Amazon SNS) is a web service that coordinates and manages the delivery or sending of messages to subscribing endpoints or clients.  In Amazon SNS, there are two types of clients - publishers and subscribers 0 also referred to as producers and consumers.  Publishers communicate asynchronously with subscribers by producing and sending message to a topic, which is a logical access point and communication channel.  Subscribers (ex. web servers, email addresses, Amazon SQS, AWS Lambda functions) consume or receive the message or notification over one of the supported protocols (ex. Amazon SQS, HTTP or HTTPS, email, SMS Lambda) when they are subscribed to the topic.

Simple Queue Service      
       - Amazon Simple Queue Service (Amazon SQS) offers a secure, durable, and available hosted queue that lets you integrate and decouple distributed software systems and components.  AMazon SQS offers common constructs such as dead-letter queues and cost allocation tags.  It provides a generic web services API and it can be accessed by any programming language that the AWS SDK supports.
       - There are currently 2 types of SQS queues and these are:
          Standard
          FIFO

SWF
       - Amazon SWF (Simple Workflow Service) helps developers build, run, and scale background jobs that have parallel or sequential steps.  You can think of Amazon SWF as a fully-managed state tracker and task coordinator in the Cloud. This coordinates automated tasks and human tasks.
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