Does the SDK include Lambda trigger shapes?

[chrylis]

Describe the issue

I am trying to write support for consuming the Cognito PreSignup Lambda trigger, and the documentation (scattered across multiple pages) shows the top-level members but not any internal structure. I have looked through the source and binary of cognitoidentityprovider, and though the LambdaConfigType references the PreSignup trigger, there appears to be no further reference to it.

I had hoped that the SDK would include a Java class that modeled the incoming data structore for the Lambda triggers applicable to the product in question; is it present somewhere that I haven't yet found?

Links

• https://docs.aws.amazon.com/cognito/latest/developerguide/user-pool-lambda-pre-sign-up.html#cognito-user-pools-lambda-trigger-syntax-pre-signup
• https://docs.aws.amazon.com/cognito/latest/developerguide/cognito-user-identity-pools-working-with-aws-lambda-triggers.html#cognito-user-pools-lambda-trigger-syntax-shared
• https://github.com/aws/aws-sdk-java-v2/blob/b0d5c74/services/cognitoidentityprovider/src/main/resources/codegen-resources/service-2.json#L5583-L5586

[debora-ito]

Going through the Cognito Lambda triggers documentation, I understand you need to configure a Lambda trigger in the user pool, providing a trigger type (like Pre Signup) and the Lambda function you want to be invoked.

Is this the example you are looking for? How to configure the Lambda trigger in the user pool using Java SDK?

[debora-ito]

Here's a sample of how to associate a lambda function to a user pool in the preSignUp trigger:

    UpdateUserPoolRequest request = UpdateUserPoolRequest.builder()
        .userPoolId(USER_POOL_ID)
        .lambdaConfig(l -> l.preSignUp("arn:aws:lambda:us-west-2:<xxx>:function:<myLambdaFunction>"))
        .build();

    UpdateUserPoolResponse response = client.updateUserPool(request);

The LambdaConfigType docs are not super clear, but each trigger method takes a Lambda ARN as an argument.