My state machine starts with a MAP state. Inside the Map state, there are 2 tasks, one after one (task#1 invokes lambda A, task#2 invokes lambda B). The lambda A will process the files conversion, upload those files into S3, and return a S3 object key. The lambda B will grab the S3 object key from task#1, get the object from S3, and then interact with the third party API.
My question is that before the lambda B is invoked, is there a way to notify the state machine that the files have been saved in S3 and ready to be read? Could we implement the S3-EventBridge in the asynchronous express workflows?
AWS 공식업데이트됨 일 년 전
My bad, forget to mention that I am using python boto3 SDK for the lambda. When the uploading through upload_file() is finished, it returns nothing. So I am not sure that it means the files uploading are done or just S3 accepts the API call without an exception.
Should be done when it returns.