Is it possible to call an AWS lambda function from another lambda function

Question

Can someone help me on how to do this? I have looked for answers almost everywhere but didn't find a solution. Please help.

Answer 1

Here is what I found on Amazon docs using AWS SDK:

var aws = require('aws-sdk');
var lambda = new aws.Lambda({
  region: 'us-west-2' //change to your region
});

lambda.invoke({
  FunctionName: 'name_of_your_lambda_function',
  Payload: JSON.stringify(event, null, 2) // pass params
}, function(error, data) {
  if (error) {
    context.done('error', error);
  }
  if(data.Payload){
   context.succeed(data.Payload)
  }
});

You can find the doc here: http://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/Lambda.html

Comments

It is better to use the (Lambda) -> (SNS) -> (Lambda) pattern as this adds a level of retry logic (sns will retry three times) should the initial request fail.  It also allows you to connect functions together without having to hack the code thus keeping a clean separation between deployment and business solution.

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Yes, thats a good approach.