Royce  Reinger

Royce Reinger

1619684055

Triggering AWS Lambda Events with DynamoDB Integration

This is a basic introduction to Lambda triggers that uses DynamoDB as an event source example.

We talk a lot about the more advanced level of Lambda triggers in our popular two-part series: Complete Guide to Lambda Triggers.

We’re going back to the basics this time because skipping some steps when learning something new might get you confused. It tends to get annoying, or it can even make you frustrated. Why?

To understand how something works appropriately and later on to know how to apply your knowledge practically without stress, you must master the particular subject in a particular order.

Let me put it this way: you can’t calculate how fast is a subatomic particle moving in space if it’s 300 lightyears away from the closest planet if you don’t know the basic math, like 3.14 times 42, right?

So, back to our topic here, what are AWS Lambda triggers?

Lambda Triggers Explained with DynamoDB Integration

DynamoDB is an AWS product just like Lambda, and therefore you’re able to create triggers with ease. Triggers are pieces of code that will automatically respond to any events in DynamoDB Streams.

Triggers allow you to build applications that will then react to any data modification made in DynamoDB tables. By enabling DynamoDB Streams on a table, you will be able to associate an ARN with your Lambda function. Instantly after an item in the table is modified, a new record will appear in the table’s stream. When AWS Lambda detects a new stream record, it will invoke your Lambda function synchronously.

Lambda functions can perform any actions you specify, like sending notifications or a workflow initiation.

An example: suppose you have a mobile gaming app that’s writing on a GameScores table. Each time the TopScore attribute of the GameScores table is updated, a corresponding stream record will be written to the table’s stream. You can then set a Lambda function to post a message on social media sites once the event is triggered.

#aws-lambda #aws #aws-services #dynamodb #serverless

What is GEEK

Buddha Community

Triggering AWS Lambda Events with DynamoDB Integration
Royce  Reinger

Royce Reinger

1619684055

Triggering AWS Lambda Events with DynamoDB Integration

This is a basic introduction to Lambda triggers that uses DynamoDB as an event source example.

We talk a lot about the more advanced level of Lambda triggers in our popular two-part series: Complete Guide to Lambda Triggers.

We’re going back to the basics this time because skipping some steps when learning something new might get you confused. It tends to get annoying, or it can even make you frustrated. Why?

To understand how something works appropriately and later on to know how to apply your knowledge practically without stress, you must master the particular subject in a particular order.

Let me put it this way: you can’t calculate how fast is a subatomic particle moving in space if it’s 300 lightyears away from the closest planet if you don’t know the basic math, like 3.14 times 42, right?

So, back to our topic here, what are AWS Lambda triggers?

Lambda Triggers Explained with DynamoDB Integration

DynamoDB is an AWS product just like Lambda, and therefore you’re able to create triggers with ease. Triggers are pieces of code that will automatically respond to any events in DynamoDB Streams.

Triggers allow you to build applications that will then react to any data modification made in DynamoDB tables. By enabling DynamoDB Streams on a table, you will be able to associate an ARN with your Lambda function. Instantly after an item in the table is modified, a new record will appear in the table’s stream. When AWS Lambda detects a new stream record, it will invoke your Lambda function synchronously.

Lambda functions can perform any actions you specify, like sending notifications or a workflow initiation.

An example: suppose you have a mobile gaming app that’s writing on a GameScores table. Each time the TopScore attribute of the GameScores table is updated, a corresponding stream record will be written to the table’s stream. You can then set a Lambda function to post a message on social media sites once the event is triggered.

#aws-lambda #aws #aws-services #dynamodb #serverless

Luis  Rodrigues

Luis Rodrigues

1604373408

Write S3 Event Message Into DynamoDB Using Lambda Function

Objective

The objective of this article is to create a lambda function that will parse the event time and object key from an S3 event message when a new object is created/uploaded into the S3 bucket. The lambda function will also put these datas into the DynamoDB table.

Now, let’s discuss about the services and tools that we’ll use in this project.

AWS Lambda

AWS lambda lets the user to run code without provisioning or managing servers and the user needs to pay for how much they use. The user can also scale it up and down according to their needs.

AWS S3

Amazon S3 has a simple web services interface that you can use to store and retrieve any amount of data, at any time, from anywhere on the web.

#amazon-dynamodb #aws-s3 #aws-lambda #aws-sam #aws-cloud9

Cross-account access to invoke AWS lambda using AWS CDK

If you are here, you may have a pretty good knowledge of how to use AWS CDK for defining cloud infrastructure in code and provisioning it through AWS. So let’s get started on how to grant permission to your lambda function to access the resources in another AWS account.

Let’s say you have two accounts called Account A and Account B, and you need to give permission to lambda function in Account A (ex: 11111111)to access the resources in Account B(22222222). You can easily do this by assuming an IAM Role in Account B and then uses the returned credentials to invoke AWS resources in Account B.

#acces #account #aws #lambda #aws lambda #aws cdk

藤本  結衣

藤本 結衣

1591878120

[AWS CDK超入門] DynamoDB + Lambda + API GatewayでAPIを作ってみた | Developers.IO

AWS CDK とは AWS Cloud Development Kit (AWS CDK)は AWS のリソースを Typescript や Python 等のコードで定義するフレームワークです。コードで定義したリソー […]

#aws #aws cdk #dynamodb #lambda #api

Cache secrets using AWS Lambda extensions

What is the AWS Lambda extension?

A month back AWS announced a preview of Lambda Extensions, a new way to easily integrate Lambda with your favorite monitoring, observability, security, and governance tools. Extensions can be published as Lambda layers, there are two types are extension:

  • Internal extensions → Run as part of the runtime process, in-process with your code. Internal extensions enable use cases such as automatically instrumenting code.
  • External extensions → Allow you to run separate processes from the runtime but still within the same execution environment as the Lambda function. External extensions can start before the runtime process and can continue after the runtime shuts down. These extensions run as companion processes to Lambda functions.

#aws #aws-secrets-manager #lambda #aws lambda