invoke aws lambda from another lambda asynchronously

Question

I need to invoke aws lambda from another lambda asynchronously. i have a working code for synchronous calls.

exports.handler = (event, context, callback) =&g         


        

Answer 1

I wanted a similar solution as above. Though step functions are now recommended when using multiple lambda functions over lambda.invoke , I used the following code snippet to asynchronously call two other lambda functions from my base lambda function.

var AWS = require('aws-sdk');
AWS.config.region = 'ap-southeast-1';
var lambda = new AWS.Lambda();

exports.handler = async(event) => {
   await invokeLambda(event);
   
   const response = {
        statusCode: 200,
        body: JSON.stringify('success'),
   };
   
   return response;
};

//Invoke Multiple Lambda functions
  async function invokeLambda(event) {
    const function1 = {
        FunctionName: 'dev-test-async-lambda-1',
        InvocationType: 'Event',
        Payload: JSON.stringify(event)
    };

    const function2 = {
        FunctionName: 'dev-test-async-lambda-2',
        InvocationType: 'Event',
        Payload: JSON.stringify(event)
    };
    
    await lambda.invoke(function1).promise();
    await lambda.invoke(function2).promise();

}

        

Let me know if I can improve this.