New Serverless Pattern - Add Lambda Durable Functions - Human Approval Pattern #2874
+782
−0
Conversation
This file contains hidden or bidirectional Unicode text that may be interpreted or compiled differently than what appears below. To review, open the file in an editor that reveals hidden Unicode characters.
Learn more about bidirectional Unicode characters
agawanea
changed the title
bfreiberg
requested changes
Dec 8, 2025
Contributor
bfreiberg
left a comment
bfreiberg
left a comment
There was a problem hiding this comment.
Please double check the correct feature name
| @@ -0,0 +1,267 @@ | |||
| # Human-in-the-Loop Approval Workflow with Lambda Durable Functions | |||
Contributor
There was a problem hiding this comment.
Suggested change
| # Human-in-the-Loop Approval Workflow with Lambda Durable Functions | |
| # Human-in-the-Loop Approval Workflow with AWS Lambda durable functions |
| @@ -0,0 +1,267 @@ | |||
| # Human-in-the-Loop Approval Workflow with Lambda Durable Functions | |||
|
|
|||
| This pattern demonstrates a human-in-the-loop approval workflow using AWS Lambda Durable Functions. The workflow pauses execution for up to 24 hours while waiting for human approval via email, automatically handling timeouts and resuming when decisions are received. | |||
Contributor
There was a problem hiding this comment.
Suggested change
| This pattern demonstrates a human-in-the-loop approval workflow using AWS Lambda Durable Functions. The workflow pauses execution for up to 24 hours while waiting for human approval via email, automatically handling timeouts and resuming when decisions are received. | |
| This pattern demonstrates a human-in-the-loop approval workflow using AWS Lambda durable functions. The workflow pauses execution for up to 24 hours while waiting for human approval via email, automatically handling timeouts and resuming when decisions are received. |
|
|
||
| This pattern demonstrates a human-in-the-loop approval workflow using AWS Lambda Durable Functions. The workflow pauses execution for up to 24 hours while waiting for human approval via email, automatically handling timeouts and resuming when decisions are received. | ||
|
|
||
| **Important:** Lambda Durable Functions are currently available in the **us-east-2 (Ohio)** region only. |
Contributor
There was a problem hiding this comment.
This will change in the near future, reword to something like "check regional availability". Also please note the name is Lambda durable functions (lowercase)
|
|
||
|  | ||
|
|
||
| The pattern uses Lambda Durable Functions to implement a cost-effective approval workflow that can wait up to 24 hours without incurring compute charges during the wait period. |
Contributor
There was a problem hiding this comment.
Suggested change
| The pattern uses Lambda Durable Functions to implement a cost-effective approval workflow that can wait up to 24 hours without incurring compute charges during the wait period. | |
| The pattern uses Lambda durable functions to implement a cost-effective approval workflow that can wait up to 24 hours without incurring compute charges during the wait period. |
Contributor
There was a problem hiding this comment.
Please correct the name throughout
|
|
||
| ### Workflow Steps | ||
|
|
||
| 1. **User submits approval request** via API Gateway |
Contributor
There was a problem hiding this comment.
Suggested change
| 1. **User submits approval request** via API Gateway | |
| 1. **User submits approval request** via Amazon API Gateway |
| --follow | ||
| ``` | ||
|
|
||
| ### DynamoDB Table |
| @@ -0,0 +1,62 @@ | |||
| { | |||
| "title": "Human-in-the-Loop Approval Workflow with Lambda Durable Functions", | |||
Contributor
There was a problem hiding this comment.
Suggested change
| "title": "Human-in-the-Loop Approval Workflow with Lambda Durable Functions", | |
| "title": "Human-in-the-Loop Approval Workflow with Lambda durable functions", |
Contributor
There was a problem hiding this comment.
correct additional mentions below
| "name": "Abhishek Agawane", | ||
| "image": "https://drive.google.com/file/d/1E-5koDaKEaMUtOctX32I9TLwfh3kgpAq/view?usp=drivesdk", | ||
| "bio": "Abhishek Agawane is a Security Consultant at Amazon Web Services with more than 8 years of industry experience. He helps organizations architect resilient, secure, and efficient cloud environments, guiding them through complex challenges and large-scale infrastructure transformations. He has helped numerous organizations enhance their cloud operations through targeted optimizations, robust architectures, and best-practice implementations.", | ||
| "linkedin": "https://www.linkedin.com/in/agawabhi/" |
Contributor
There was a problem hiding this comment.
Suggested change
| "linkedin": "https://www.linkedin.com/in/agawabhi/" | |
| "linkedin": "agawabhi" |
|
|
||
| ### Click Approve or Reject | ||
|
|
||
| Click one of the links in the email. You'll see a confirmation page with: |
Contributor
There was a problem hiding this comment.
Reword this to full sentences instead of a bullet pointed list
Comment on lines
+195
to
+203
| ```yaml | ||
| DurableConfig: | ||
| ExecutionTimeout: 86400 # 24 hours in seconds | ||
| ``` | ||
|
|
||
| And in `src/lambda_function.py`: | ||
|
|
||
| ```python | ||
| config=CallbackConfig(timeout=Duration.from_hours(24)) |
Contributor
There was a problem hiding this comment.
Can you add a short explanation why it needs to be changed in two places
Sign up for free
to join this conversation on GitHub.
Already have an account?
Sign in to comment
4 participants
Add this suggestion to a batch that can be applied as a single commit.
This suggestion is invalid because no changes were made to the code.
Suggestions cannot be applied while the pull request is closed.
Suggestions cannot be applied while viewing a subset of changes.
Only one suggestion per line can be applied in a batch.
Add this suggestion to a batch that can be applied as a single commit.
Applying suggestions on deleted lines is not supported.
You must change the existing code in this line in order to create a valid suggestion.
Outdated suggestions cannot be applied.
This suggestion has been applied or marked resolved.
Suggestions cannot be applied from pending reviews.
Suggestions cannot be applied on multi-line comments.
Suggestions cannot be applied while the pull request is queued to merge.
Suggestion cannot be applied right now. Please check back later.
Issue #, if available:
#2875
Description of changes:
This PR adds a new serverless pattern: Lambda Durable Functions - Human-in-the-Loop Approval Pattern
This pattern demonstrates a cost-effective human approval workflow using AWS Lambda Durable Functions. The workflow pauses execution for up to 24 hours while waiting for human approval via email, without incurring compute charges during the wait period.
Testing:
Pattern has been fully tested and deployed in us-east-2 region with successful validation of:
send_durable_execution_callback_successAPIBy submitting this pull request, I confirm that you can use, modify, copy, and redistribute this contribution, under the terms of your choice.