Using Dynamo DB client in my custom ask-sdk webhook - amazon-dynamodb

Question

I have used my own custom webhook using ask-sdk and is deployed in my ec2 instance. Now I want to use DynamoDB as DynamoDbPersistenceAdapter
but I am not getting any reference how to do that.
DynamoDbPersistenceAdapter will need AWS Keys and table name and some details for dynamo db but where to initialize? I found some code, but this dont have anything :
persistenceAdapter = new DynamoDbPersistenceAdapter({
tableName: 'global_attr_table',
createTable: true,
partitionKeyGenerator: keyGenerator
});

Answer 1

This can probably be solved by adding environmental variables and by setting up an AWS CLI profile:
Heres how you setup an AWS CLI Profile:
https://docs.aws.amazon.com/cli/latest/userguide/cli-chap-configure.html
Once you have a profile setup with your AWS access information you can export Environmental Variables in your command line or in a shell script
$> export AWS_PROFILE=YourNewAWSCLIProfileName
$> export AWS_REGION=us-east-1
$> export AWS_DEFAULT_REGION=us-east-1
and you can check that these variables are set by typing
$> echo $AWS_PROFILE
$> echo $AWS_REGION
$> echo $AWS_DEFAULT_REGION
This is what I use. If for some reason that doesnt work here is some research into how you might add a DynamoDB Client:
Trying to solve a different problem so let me solve yours as I walk through mine:
In: node_modules/ask-sdk/dist/skill/factory/StandardSkillFactory.js
there is reference to something similar to what you have above
new ask_sdk_dynamodb_persistence_adapter_1.DynamoDbPersistenceAdapter({
tableName: thisTableName,
createTable: thisAutoCreateTable,
partitionKeyGenerator: thisPartitionKeyGenerator,
dynamoDBClient: thisDynamoDbClient,
})
I believe you need to create a DynamoDbClient instance which I found referenced here in the AWS SDK Docs.
https://docs.aws.amazon.com/sdk-for-javascript/v2/developer-guide/dynamodb-example-document-client.html
You'd have to set your own service:
In: node_modules/aws-sdk/lib/dynamodb/document_client.js
/**
* Creates a DynamoDB document client with a set of configuration options.
*
* #option options params [map] An optional map of parameters to bind to every
* request sent by this service object.
* #option options service [AWS.DynamoDB] An optional pre-configured instance
* of the AWS.DynamoDB service object to use for requests. The object may
* bound parameters used by the document client.
* #option options convertEmptyValues [Boolean] set to true if you would like
* the document client to convert empty values (0-length strings, binary
* buffers, and sets) to be converted to NULL types when persisting to
* DynamoDB.
* #see AWS.DynamoDB.constructor
*
*/
constructor: function DocumentClient(options) {
var self = this;
self.options = options || {};
self.configure(self.options);
},
/**
* #api private
*/
configure: function configure(options) {
var self = this;
self.service = options.service;
self.bindServiceObject(options);
self.attrValue = options.attrValue =
self.service.api.operations.putItem.input.members.Item.value.shape;
},
/**
* #api private
*/
bindServiceObject: function bindServiceObject(options) {
var self = this;
options = options || {};
if (!self.service) {
self.service = new AWS.DynamoDB(options);
} else {
var config = AWS.util.copy(self.service.config);
self.service = new self.service.constructor.__super__(config);
self.service.config.params =
AWS.util.merge(self.service.config.params || {}, options.params);
}
},
I'm not sure what those options might look like.