/dropwizard-lambda-gateway

Primary LanguageJava

Dropwizard Lambda gateway

This is a simple dropwizard container for local development execution of labmdas.

Configure your Lambdas

Create a file <your project>/src/main/resources/settings.yml that specifies details about your labmda and API Gateway configuration. This configuration is borrowed from Gordon which can then be used for deployment into AWS.

Below is an example of a settings.yml file or see https://github.com/kmonkeyjam/dropwizard-lambda-gateway/blob/master/example/src/main/resources/settings.yml.

lambdas:
    test:
        runtime: java8
        handler: ExampleLambda::handlePost

    test2:
        runtime: java8
        handler: ExampleLambda
    
apigateway:
    api:
        description: my apis
        resources:
            /test:
                methods: POST
                integration:
                    lambda: test
            /test2:
                methods: GET
                integration:
                    lambda: test2
            /redirect:
                methods: GET
                responses:
                  - code: "302"
                    parameters:
                        method.response.header.Location: True
                integration:
                    lambda: redirect
                    responses:
                      - pattern: ""
                        code: "302"
                        parameters:
                            method.response.header.Location:
                                integration.response.body.location

Building and running lambda-wrapper locally

From within the lambda-wrapper directory:

Build: mvn install

Run as prod or dev: java -jar target/lambda-wrapper-0.0.1-SNAPSHOT.jar server dev.yml

Embedding lambdas for development and easier debugging

The example project shows a simple maven project configured to load the lambdas locally as a maven dependency. Notice in the config you can leave out the jarLoc to load the class from the main jar.

If you use Paw (https://luckymarmot.com/paw) for easy testing, you can use the test.paw file as a convenience.