How to make DynamoDB Table calls to different location than lambda endpoint? - amazon-dynamodb

Question

I am trying to access a table in DynamoDB which is hosted in Europe (Ireland) eu-west-1, from a lambda endpoint which is hosted in US East (N. Virginia) us-east-1 - however, I am always getting the error:
{
"message": "Requested resource not found",
"code": "ResourceNotFoundException",
"time": "2020-07-05T22:13:17.145Z",
"requestId": "6SGPGDFVN6AE4QMC5A8LG2RJ0JVV4KQNSO5AEMVJF66Q9ASUAAJG",
"statusCode": 400,
"retryable": false,
"retryDelay": 27.110475966612935
}
this is my code my code to call the DB:
class DynamoDB {
constructor() {
this.region = 'eu-west-1';
this.endpoint = 'https://dynamodb.eu-west-1.amazonaws.com';
this.tableName = 'MyTableName';
this.docClient = new AWS.DynamoDB.DocumentClient();
}
getUser(userId) {
return new Promise((resolve, reject) => {
const params = {
TableName: this.tableName,
Key: {
"id": userId,
}
}
this.docClient.get(params, function(err, data) {
if (err || !data.Item) {
console.error("Unable to read item. Error JSON:", JSON.stringify(err, null, 2));
return reject(JSON.stringify(err, null, 2))
} else {
console.log("GetItem data succeeded:", JSON.stringify(data, null, 2));
resolve(data.Item);
}
});
});
}
}
const DynamoDB = require("../Libraries/DynamoDB");
const $ = new DynamoDB;
const Interceptor = {
async process(session) {
return $.getUser(session.id).then(data => {
console.log(`User gotten! ${JSON.stringify(data, null, 2)}`);
}).catch(err => {
console.log(`Failure getting user... ${err}`);
};
}).finally(async () => {
await InitGameSettings();
});
}
When I attempt this using an endpoint that is hosted in the same region as the DynamoDB table - it works fine! Only when I try this using different regions does it break. Why is this?

Answer 1

Looks like the SDK is not using the DDB region and endpoint that you configured. Could you try replacing the constructor() with the following code snippet?
constructor() {
this.region = 'eu-west-1';
this.endpoint = 'https://dynamodb.eu-west-1.amazonaws.com';
this.tableName = 'MyTableName';
this.ddbService = new AWS.DynamoDB({
apiVersion: '2012-08-10',
endpoint: this.endpoint,
region: this.region
});
this.docClient = new AWS.DynamoDB.DocumentClient({
service: this.ddbService
});
}