This project demonstrates the Lambda for Powertools Java module - including logging, tracing, and metrics.
It is made up of the following:
- App.java - Code for the application's Lambda function.
- events - Invocation events that you can use to invoke the function.
- AppTests.java - Unit tests for the application code.
- template.yaml - A template that defines the application's AWS resources.
This sample is based on Serverless Application Model (SAM). To deploy it, check out the instructions for getting started with SAM in the examples directory
Once the app is deployed, you can invoke the endpoint like this:
curl https://[REST-API-ID].execute-api.[REGION].amazonaws.com/Prod/hello/The response itself isn't particularly interesting - you will get back some information about your IP address. If you go to the Lambda Console and locate the lambda you have deployed, then click the "Monitoring" tab you will be able to find:
- View X-Ray traces - Display the traces captured by the traces module. These include subsegments for the different function calls within the example
- View Cloudwatch logs - Display the structured logging output of the example
Likewise, from the CloudWatch dashboard, under Metrics, all metrics, you will find the namespaces Another
and ServerlessAirline. The values in each of these are published by the code in
App.java.
You can also watch the trace information or log information using the SAM CLI:
# Tail the logs
sam logs --tail $MY_STACK
# Tail the traces
sam traces --tail