The Scalable Webhook
Interactive Reference Architecture
Click on the components or numbered steps below to explore how this architecture works.
If you're building a webhook, the traffic can often be unpredictable. This is fine for Lambda, but if you're using a "less-scalable" backend like RDS, you might just run into some bottlenecks. There are ways to manage this, but because Lambda supports SQS triggers, we can throttle our workloads by queuing the requests and then using a throttled (low concurrency) Lambda function to work through our queue. Under most circumstances, your throughput should be near real-time. If there is some heavy load for a period of time, you might experience some small delays as the throttled Lambda chews through the messages.
You'll also want to handle failed messages using a Dead Letter Queues (DLQ). The SQS Poller will adjust its polling frequency based on your Lambda function's concurrency. You'll need to configure your redrive policies to appropriately handle failed messages.
Deploy this Pattern
Below are the basic configurations for deploying this pattern using different frameworks and platforms. Additional configuration for your environment will be necessary. The source files and additional examples are available in the GitHub repo.
# Code sample coming soon
Are you a CDK Guru? Would you like to contribute patterns to the community? Check out the Github repo!