Send every time new UUID to AWS step function through AWS CloudWatch event rule

Question

How to send a unique value(UUID4) to the step function is the json format, when it was triggered every time from the cloudwatch event rules? Can any one help on this. Thanks in advance.

Answer 1

AWS Step Functions now provides an intrinsic function to generate a UUIDv4 string in the ASL definition: https://docs.aws.amazon.com/step-functions/latest/dg/amazon-states-language-intrinsic-functions.html#asl-intrsc-func-uuid-generate

Example:

"uuid.$": "States.UUID()"

// output
{ "uuid": "ca4c1140-dcc1-40cd-ad05-7b4aa23df4a8" }