Demonstrates the function chaining pattern using Lambda durable functions with automatic checkpointing and fault-tolerant sequential execution
This pattern demonstrates the function chaining pattern using Lambda durable functions.
A durable orchestrator function chains three Lambda functions sequentially using context.invoke().
Each invocation creates an automatic checkpoint, enabling the workflow to resume from the last successful step after failures.
Step 1 (Add) initializes data and adds 10 to the input value.
Step 2 (Transform) doubles the value and transforms the name to uppercase.
Step 3 (Finalize) adds 5 to the value and sets the completion status.
The pattern showcases fault-tolerant workflow orchestration without managing state infrastructure.
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Clone repo
git clone https://github.com/aws-samples/serverless-patterns/cd serverless-patterns/lambda-durable-function-chaining-samDeploy
sam buildsam deploy --guidedTesting
Get the orchestrator alias ARN from stack outputs:
DURABLE_FUNCTION_ARN=$(aws cloudformation describe-stacks --stack-name durable-function-chaining --query 'Stacks[0].Outputs[?OutputKey==`OrchestratorAliasArn`].OutputValue' --output text)Invoke the workflow:
aws lambda invoke --function-name "$DURABLE_FUNCTION_ARN" --payload '{"id": "test-123", "name": "demo", "value": 5}' --cli-binary-format raw-in-base64-out response.jsoncat response.jsonExpected output shows value transformation: 5 → +10 (step1) → ×2 (step2) → +5 (step3) = 35
Cleanup
Delete the stack:
sam deleteCreated by:
