Building a Serverless AWS lambda API on AWS in java

Name: Building a Serverless AWS lambda API on AWS in java
Rating: 3.9 (216 reviews)

Build a productive serverless AWS Lambda API on the Amazon Web Services platform in hours for Java developers.

Created byDries Horions

Last updated 12/2017

English

What you'll learn

Grasp how aws lambda works and its fundamental concepts.
Create a real world API using aws lambda functions and Amazon API Gateway.
Avoid common pitfalls and mistakes.
Understand the security concept around AWS services.
Understand and use triggers for lambda aws functions.
Learn how to call lambda functions directly from java code.

Course content

4 sections • 24 lectures • 1h 26m total length

Introduction to AWS Lambda0:44
Learn to write, deploy, and expose a serverless API using AWS Lambda and API Gateway in Java, culminating in a production-ready service that resizes images on the fly.
Tools and accounts needed to develop aws lambda functions in Java1:07
Set up with an IDE and AWS account. Install NetBeans IDE (Java SE or Java EE) or use Eclipse, and start creating a serverless function within the free tier.
AWS lambda Course Overview0:39
Create and deploy a Lambda function on AWS, call it from Java, set up identity and access management and API gateway REST API, then trigger with Cloudwatch events every minute.

Setting up the AWS Lambda Project in the IDE6:28
Set up a maven java project in the NetBeans IDE, add aws lambda core and maven assembly plugin, and build a fat jar ready for aws lambda deployment.
Implementing the AWS Lambda Function6:05
Implement a simple AWS Lambda function in Java using input and output pojos and a handler. Log to CloudWatch and use the context to expose function name and memory limit.
Java concepts for AWS lambda functions
Deploying the AWS Lambda Function on AWS10:12
Deploy a java AWS lambda function from scratch, configure memory and timeout, set the handler, and upload the jar. Then test with events and monitor logs and metrics in CloudWatch.
Creating a AWS Lambda serverless function

Set up AWS IAM permissions4:53
Create a dedicated IAM user and helloLambda group, attach an inline policy for Lambda invoke, and configure a HelloLambda credentials profile for Java access.
Direct Java Call to an AWS Lambda function9:18
Create a Java project to call an AWS lambda function from your local machine using the hellolambda credentials profile in NetBeans, printing the JSON payload result.
API gateway Call to an AWS Lambda function5:33
Build and deploy a serverless API with AWS API gateway that invokes a Lambda function via a get request with a name parameter and an invoke URL.
Calling an AWS Lambda function from other AWS Services2:56
Configure AWS Lambda triggers from services like S3, SNS, and DynamoDB, and schedule recurring executions with CloudWatch events using a rate expression to run every minute.

A dynamic image resizer using Amazon Web Services0:38
Build a dynamic image resizer in AWS Lambda that fetches an image URL, resizes it, stores it in S3, and returns the URL of the resized image.
Creating an Amazon Web Services S3 bucket to store resized images1:06
Create an s3 bucket to store resized images, understand the arn format arn:aws:s3:::bucket-name, and grant the lambda function write access via a role.
Setting up the project and creating the input class2:28
Set up a java serverless lambda project with dependencies, handler and input class, include image scaler by Riyad Kalla and AWS S3 SDK, and configure a fat jar in pom.xml.
The Resizer Class Design1:30
Design and implement a resizer class for a serverless AWS lambda API in Java, featuring createUrl, readImage, resizeImage, storeImage, alreadyExists, getS3Key and getS3Client methods, plus bucketname and publicurl configs.
The Resizer Class0:48
Explore the resizer class within the context of building a serverless AWS Lambda API in Java.
The createUrl Method3:28
Explore the createUrl method within a serverless AWS Lambda API built in Java, and learn how it handles URL generation for efficient, scalable cloud functions.
The readImage method1:35
Explore the readImage method for image handling in a serverless AWS Lambda API built with Java.
The resizeImage method3:15
Discover how the resizeImage method powers a serverless AWS Lambda API built in Java, enabling image resizing within a scalable cloud function.
The storeImageInS3 Method6:15
Implement the storeImageInS3 method in a serverless aws lambda API using java, enabling image upload to s3 and handling integration with lambda.
The alreadyExists Method1:54
Examine how the alreadyExists method functions within a serverless AWS lambda API built on AWS in Java.
Tying it all together3:14
Implement a handleRequest method to tie together the previously created methods into the final AWS Lambda function.
Deploying the AWS Lambda Function on Amazon Web Services4:32
Deploy a java 8 aws lambda with a fat jar by attaching an iam role for s3 write access, then configure bucketname and publicurl environment variables and test resize flow.
Creating the API on Amazon API Gateway6:11
Create an api gateway to invoke a lambda function, using width and height as path parameters and a url as a query parameter, then redirect to the resized image.
Testing the API on AWS API Gateway1:25
Demonstrates testing a serverless aws lambda api via api gateway by resizing an image to three sizes with height and width parameters, illustrating a http 302 redirect in html.

Requirements

You should have some experience with java
You should have internet access, and be able to install software on your pc
Having some familiarity with Amazon AWS is a plus, but not absolutely necessary.

Description

Building a Serverless AWS lambda API on AWS in java is a great way to get started to develop applications on the AWS lambda platform that scale without the hassle of managing servers.

This course is intended for every Java developer that wants to be able to build a productive serverless API within a few hours, using aws lambda and Amazon API Gateway.

The Amazon aws cloud platform offers a lot of amazing services.

However, each one of those services has a learning curve, and it can cost a lot of time become productive with any of these services just by reading the developer guides and taking the Trial and Error approach.

In this course you’ll learn how to write and deploy a aws lambda functions and how to create an AWS API Gateway endpoint to use that AWS lambda function.

At the end of the course you’ll learn to create a production ready webservice on the Amazon Web Services platform that can be used to resize any image on the fly.

We discuss all of the aws-lambda configuration options, how to configure the IAM (AWS Identity and access Management) to give your aws lambda function access to Amazon Web Services such as AWS s3, AWS Cloudwatch, ... and we'll configure AWS API Gateway to create a REST api endpoint for our serverless aws lambda function.

Overview of the Course

Introduction to AWS Lambda
Tools and accounts needed to develop aws lambda functions in Java
AWS lambda Course Overview
Setting up the AWS Lambda Project in the IDE
Implementing the AWS Lambda Function
Quiz : Java concepts for AWS lambda functions
Deploying the AWS Lambda Function on AWS
Quiz : Creating a AWS Lambda serverless function
Set up AWS Identity and Access Management IAM permissions
Direct Java Call to an AWS Lambda function
API gateway Call to an AWS Lambda function
Calling an AWS Lambda function from other AWS Services
A dynamic image resizer using Amazon Web Services
Creating an Amazon Web Services S3 bucket to store resized images
Setting up the project and creating the input class
The Resizer Class Design
The Resizer Class
The createUrl Method
The readImage method
Tying it all together
Deploying the AWS Lambda Function on Amazon Web Services
Creating the API on Amazon API Gateway
Testing the API on AWS API Gateway

Who this course is for:

Java developers that want to write serverless code

Building a Serverless AWS lambda API on AWS in java

What you'll learn

Explore related topics

Course content

Introduction to Amazon Web Services Lambda3 lectures • 3min

Creating A Serverless Function on AWS Lambda3 lectures • 23min

Calling the serverless function4 lectures • 23min

A more advanced AWS lambda function14 lectures • 38min

Requirements

Description

Who this course is for: