Cfnresponse
NOTE: This library has been replaced by tongueroo/cfn_response. It's interface is much improved.
Cfnresponse helps with writing Custom CloudFormation resources. The main method is send_response, which builds the response that is sent back to CloudFormation service from the Lambda function.
Installation
Add this line to your application's Gemfile:
gem 'cfnresponse'And then execute:
$ bundle
Or install it yourself as:
$ gem install cfnresponse
Example Usage
require "cfnresponse"
include Cfnresponse
def lambda_handler(event:, context:)
puts("Received event: " + json_pretty(event))
case event['RequestType']
when "Create"
# create logic
send_response(event, context, "SUCCESS")
when "Update"
# update logic
send_response(event, context, "SUCCESS")
when "Delete"
# delete logic
send_response(event, context, "SUCCESS")
end
sleep 10 # a little time for logs to be sent to CloudWatch
# We rescue all exceptions and send a message to CloudFormation so we don't have to
# wait for over an hour for the stack operation to timeout and rollback.
rescue Exception => e
puts e.message
puts e.backtrace
sleep 10 # a little time for logs to be sent to CloudWatch
send_response(event, context, "FAILED")
end