In this tutorial, we are going to see how to handle exceptions from a Lambda function in the API Gateway. For Lambda exceptions, we have to map the error status returned by the Lamba functions to the HTTP Status of the methods in API Gateway. If not, the API Gateway returns a 200 OK status…Read More Handling Exceptions from AWS Lambda written in JAVA
This tutorial is about creating Lambda functions from Spring Cloud Functions. Spring Cloud Functions provide a way to implement the business logic via functions and decouple code development from the runtime target. Hence, the developer can focus solely on the implementation of logic. The developer need not worry about the target endpoint type, connectivity, integration,…Read More Create AWS Lambda Functions from Spring Cloud Functions
In this tutorial, we are going to see how we can use the AWS API Gateway as a trigger to an AWS Lambda function. This tutorial requires you to be familiar with building and deploying Serverless Applications with AWS Lambda. Prerequisite: Build and Deploy a Serverless Spring Boot Web Application with AWS Lambda Firstly, add…Read More Trigger a Lambda Function Using AWS API Gateway
Build and deploy a Serverless Spring Boot Web Application with AWS Lambda This is a tutorial about creating a basic AWS Lambda function in Java using the Spring framework and requires you to have an active AWS account. If you don’t, go ahead and create one. Lambda is the serverless compute service provided by the…Read More Build and deploy a Serverless Spring Boot Web Application with AWS Lambda
In this post, we will cover the concepts of using AWS Lambda variables and discuss why there is a need to have environment variables in lambda functions. Use case of Environment Variables in AWS Lambda Function You can use environment variables to customize function behavior in your test environment and production environment. For example, you…Read More AWS Lambda Environment Variables – Encryption & Decryption
In this blog post, I am going to share with you a way you can assign to your EC2 instance an AWS SES(Simple Email Service) Role. Assigning a new AWS SES Role to an EC2 instance will enable that EC2 instance to execute applications that programmatically consume the AWS SES resources. 1. Create a New…Read More Assign IAM SES Role to EC2 Instance
I recently had to work on with one AWS service and to follow it’s getting started tutorial they invited me to use the CLI command-line interface which would configure a service for me. The CLI tool failed to configure the service itself and it did actually clear the existing ~/.aws/credentials file for me 🙁 which…Read More Create .aws/config and .aws/credentials Files Manually
The RestTemplate class in Spring Framework is a very easy to use HTTP Client which allows your code to send HTTP Request and also handle the HTTP Response. In this tutorial you will learn how to use RestTemplate to send different types of HTTP Requests. Create Spring Boot App RestTemplate is part of Spring Framework…Read More Spring RestTemplate Tutorial
If your mobile or web app allows the user to register and have an account with your project then you also need to let users recover their lost or forgotten password. And in this video tutorial, I am going to share with you a few videos that will help you implement Password Reset functionality in your…Read More Password Reset in REST API. Video tutorial.
Recently I have published a video course that teaches how to use Java JAX-RS to create a RESTful Web Service for your mobile application and how implement features like user Sign up, Sing in and how to communicate with protected Web Service Endpoints. I would love it if you check it out and hopefully like it, find…Read More Deploy Web Application Archive(WAR) to Amazon AWS EC2 Linux Instance
In this Java programming tutorial I would like to share with you a sample Java code that uses Amazon AWS SES(Simple Email Service) Java SDK to send an email message. I used this code implement Email Verification feature for my mobile app. The code below would send an email message containing an email verification link…Read More Send Email Message Using AWS SES Java SDK
When you start building a mobile app most likely you will need to build pages like user Sign up and once user has successfully registered, you will need to create a Sign in page. I have created many video tutorial how to implement these pages in Swift and if you follow those you will no doubt…Read More REST API with Java JAX-RS. Create and Deploy to Amazon Cloud.
In this short blog post I am going to share with you how to create a new Amazon AWS S3 bucket in Java and how to set permissions on it so that any user can read files from it but only you, the owner will have write access. You can use the code below with…Read More Create Amazon AWS S3 Bucket in Java
In this blog post I am going to share with you how to upload an image to Amazon AWS S3 Bucket. I have split information into smaller videos and it…Read More Upload Image to AWS S3 Bucket. In Swift.