How can I call another Lambda function from current Lambda function?

Question

I have 2 Lambda function. First fetch data from database and put it in DynamoDB. And Second fetch data from the DynamoDB. I want to execute both lambda function sequentially (i.e.first then second). How could I invoke 2nd Lambda function inside 1st Lambda function? How to pass data to that Lambda function? And how to get response from the 2nd Lambda function? Does anyone know possible way? Please help.... Thank u....

Possible duplicate of [Can an AWS Lambda function call another](https://stackoverflow.com/questions/31714788/can-an-aws-lambda-function-call-another) — Mark, May 16 '18 at 13:53

score 5 · Accepted Answer · edited Sep 04 '20 at 14:20

5

For nodejs you can use lambda.invoke function to execute another lambda

var aws = require("aws-sdk");
var lambda = new aws.Lambda({
  region: "us-west-1",
});

var params = {
  FunctionName: "MyFunction",
  InvocationType: "RequestResponse",
  LogType: "Tail",
  Payload: "<Stringified oject to pass parameters as event>",
};


lambda.invoke(params, function (err, data) {
  if (err) console.log(err, err.stack);
  // an error occurred
  else console.log(data); // successful response
});

for info visit this link: https://docs.aws.amazon.com/AWSJavaScriptSDK/latest/AWS/Lambda.html#invoke-property

edited Sep 04 '20 at 14:20

Dimitar Tsonev

3,711
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answered May 16 '18 at 13:54

siraj pathan

1,455
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If in some case I dont want to pass any data to 2nd function but want to receive data from it, is it possible? – ABCD May 16 '18 at 13:56
Is there any changes required in 2nd function? – ABCD May 16 '18 at 13:57
No changes required in the second function. – siraj pathan May 16 '18 at 13:58
1

in Payload just pass an empty string and you will get data returned by second function in data object – siraj pathan May 16 '18 at 13:59
That worked.... Thank u.... Now 1 last question I am getting desired output in log every time but null in response.. callback(null,cde); // not working & console.log(cde); //working..... – ABCD May 17 '18 at 07:01
Share jsfiddle link if possible – siraj pathan May 17 '18 at 12:05

How can I call another Lambda function from current Lambda function?

1 Answers1