Unable to connect to dynammo db from Lambda - node.js

Question

I have written a simple lambda function to list the tables on DynammoDb. But When i execute My code, I am unable to connect to the DB server . I am getting NetworkingError .
Below is the Code,
'use strict';
console.log('Loading function');
exports.handler = (event, context, callback) => {
console.log("$$$$$$$$$second test$$$$$$$$$$")
//var src_bkt = event.Records[0].s3.bucket.name;
//var src_key = event.Records[0].s3.object.key;
var AWS = require("aws-sdk");
//console.log(src_bkt)
console.log("##########################################")
console.log("$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$$")
var dynamodb = new AWS.DynamoDB({
region: 'us-east-1',
endpoint: "http://localhost:8000"
});
dynamodb.listTables({Limit: 10}, function(err, data) {
if (err) {
console.log("Error", err.code);
} else {
console.log("Table names are ", data.TableNames);
}
});
};
Any suggestion will be helpful

Answer 1

You need to create an instance of documentClient like below,
var docClient = new AWS.DynamoDB.DocumentClient();
And call 'listTables' with documentClient. Please find a sample code for PUT which shows how I am using documentClient,
var AWS = require("aws-sdk");
AWS.config.update({
region: "REGION"
});
var docClient = new AWS.DynamoDB.DocumentClient();
exports.handler = (event, context, callback) => {
var table = "EmployeeDetails";
var params = {
TableName: table,
Item: {
"Id" : event.Id,
"FirstName": event.FirstName,
"LastName": event.LastName,
"Age": event.Age,
"Gender": event.Gender
}
};
docClient.put(params, function (err, data) {
if (err) {
console.error("Unable to add item. Error JSON:", JSON.stringify(err, null, 2));
} else {
callback(null, "Added item:", JSON.stringify(data, null, 2))
}
});
};
If you are running in Lambda region is not mandatory but it will work with region as well.
The same code is in my GitHub as well - https://github.com/vnathv/DynamoDb-CRUD.git