Book Image

Clojure Reactive Programming

Book Image

Clojure Reactive Programming

Overview of this book

Table of Contents (19 chapters)
Clojure Reactive Programming
Credits
About the Author
Acknowledgments
About the Reviewers
www.PacktPub.com
Preface
Bibliography
Index

CloudFormation


The first service we will look at is CloudFormation. This makes sense as the APIs found in here will give us a starting point for finding information about the resources in a given stack.

The describeStacks endpoint

This endpoint is responsible for listing all stacks associated with a particular AWS account. For a given stack, its response looks like the following:

{"Stacks"
   [{"StackId"
     "arn:aws:cloudformation:ap-southeast-2:337944750480:stack/DevStack-62031/1",
     "StackStatus" "CREATE_IN_PROGRESS",
     "StackName" "DevStack-62031",
     "Parameters" [{"ParameterKey" "DevDB", "ParameterValue" nil}]}]}

Unfortunately, it doesn't say anything about which resources belong to this stack. It does, however, give us the stack name, which we can use to look up resources in the next service.

The describeStackResources endpoint

This endpoint receives many arguments, but the one we're interested in is the stack name, which, once provided, returns the following:

{"StackResources"...