Push/publish events on Step Functions state transition
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I'd like to notify an external observer (a client web app in my current case, but interested in other use cases too) of status updates when a Step Functions-orchestrated workflow progresses - in an event-driven way rather than by polling the execution history API.
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I tested out approach using CloudWatch and it works. I enabled CloudWatch logging, it logs event TaskStateEntered on start and TaskStateExited on exit. You can create filter on log like { $.type="TaskStateExited"}
Sample CloudWatch log entry
{
"id": "6",
"type": "TaskStateExited",
"details": {
"name": "State1",
"output": "{\"who\":\"amit\",\"taskresult\":{\"statusCode\":200,\"body\":\"\\\"hello from amit\\\"\"}}"
},
"previous_event_id": "5",
"event_timestamp": "1593780767604",
"execution_arn": "arn:aws:states:us-east-1:xxx:execution:MyStateMachine:fa8cfe8f-492d-7e27-7492-6aa20f12fe18"
}
답변함 4년 전
