pambda-errorhandler

Error handler pambda.

Installation

npm i pambda-errorhandler

Usage

import { compose, createLambda } from 'pambda';
import { errorhandler } from 'pambda-errorhandler';

export const handler = createLambda(
  compose(
    // errorhandler not applied.
    pambda1(),

    errorhandler({}),

    // errorhandler applied.
    pambda2()
  )
);

API

errorhandler(options)

• options.renderError
  • The function with argument (err, event, context, callback), called when an error occurs in subsequent Pambdas.
  • Default value is defaultErrorResponse.
• options.errorNotificationArn
  • A topic ARN of SNS for publishing an error.
  • Default value is process.env.ERROR_NOTIFICATION_ARN.
• options.errorNotificationTopicName
  • A topic name of SNS for publishing an error.
  • If the options.errorNotificationArn is specified, this option is ignored.

If the options.errorNotificationArn is used, such as the following configuration is needed in your SAM template:

Resources:
  YourLambda:
    Type: AWS::Serverless::Function
    Properties:
      Policies:
        - SNSPublishMessagePolicy:
            TopicName: yourSnsTopicName
      Environment:
        Variables:
          ERROR_NOTIFICATION_ARN: !Sub "arn:aws:sns:${AWS::Region}:${AWS::AccountId}:yourSnsTopicName"

defaultErrorResponse(err, event, context, callback)

Default error handling function. Returns Internal Server Error response.

Also, log objects that have properties of event and err.

License

MIT