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Photo by Pawel Czerwinski on Unsplash

Harsha's books

12 Rules for Life: An Antidote to Chaos

it was amazing

12 Rules for Life: An Antidote to Chaos

by Jordan B. Peterson

System Design Interview – An insider's guide

really liked it

System Design Interview – An insider's guide

by Alex Xu

The Unfair Advantage: BUSINESS BOOK OF THE YEAR AWARD-WINNER: How You Already Have What It Takes to Succeed

The Unfair Advantage: BUSINESS BOOK OF THE YEAR AWARD-WINNER: How You Already Have What It Takes to Succeed

by Ash Ali

97 Things Every Java Programmer Should Know: Collective Wisdom from the Experts

it was amazing

97 Things Every Java Programmer Should Know: Collective Wisdom from the Experts

by Kevlin Henney

Show Your Work!: 10 Ways to Share Your Creativity and Get Discovered

it was amazing

Show Your Work!: 10 Ways to Share Your Creativity and Get Discovered

by Austin Kleon

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Harsha Jayamanna: A Software Engineer who likes to Code, Solve Problems and Build Things.

Popular Posts

Use Spring Resource Server with AWS Cognito

What is the resource server? The resource server is the OAuth 2.0 term for your API server. For example, In your company, you might have servers such as user details server, invoices server, and order server. These servers implement the use cases of your business. These resource servers can be secured using AWS Cognito. First, the application obtains the access token from Cognito Then, the token will be included in the request header. Finally, you can call the resource server Access server-side resources How to implement it? You can use Spring boot to develop resource servers. Dependencies Spring boot: 2.4.0-M1 OpenJDK 11 Step 1 Add spring-security-oauth2-resource-server as a dependency and set jwk-set-uri and issuer-uri to your properties file. Get jwk-set-uri and issuer-uri values from AWS Cognito Console. Get the user pool id from the user pool and construct the URLs using that values and the region. User pool Step 2 Configure Spring security. "/statu

AWS Cognito + Spring Complete Example

Amazon Cognito lets you add user sign-up, sign-in, and access control to your web and mobile apps quickly and easily. With Cognito, you don't have to worry about user registration and login. In this example, we will integrate Spring boot with AWS Cognito. 1. Configure AWS Cognito. Login to aws console and navigate to Cognito. https://aws.amazon.com/cognito/ . Create a user pool and configure it. Here I will mention some of the important points which are needed to run the example I have given. Once the pool is created, create an app client. After that, configure the app client. Note that I have run this app at localhost:8089. Call back and sign out URLs are from the same host and port. Create a domain that will be used to configure the Spring application later. 2. Creating the Spring boot application. I used the spring boot initializer to create the application. Make sure to add below dependencies when creating the application. 3. Cognito

Secure APIs and Access AWS Resources with Angular and Cognito

In this post, I will explain how to securely connect your Angular application to the API and AWS resources. API is secured using AWS Cognito and we are going to access AWS Resources with the help of Cognito. The Design In this post, we are going to do two things, Access Your Server-side Resources with a User Pool (Access your secure API build with Java and Spring Boot) Access AWS Services with a User Pool and an Identity Pool (Access your records in AWS DynamoDB ) Angular, Cognito and Java API integration Setting up the Angular Application Create an Angular Application using Angular CLI(ng new my-first-project) then add AWS Amplify to it (npm install aws-amplify @aws-amplify/ui-angular). Next, configure the project by creating a file with the name aws-exports.js in the angular_app_root/src/app folder. The location of this file can be changed, this is the location I used for my project. aws-exports.js contains all the details needed to connect with AWS Cognito. const awsmobile = {

OpenLiberty, JakartaEE8 and Hibernate Integration example

Openliberty provides JakartaEE8 support and all you have to do is enable <feature>jakartaee-8.0</feature> . It also enables jpa-2.2 + EclipseLink. If you need to Hibernate with JakartaEE8 instead of EclipseLink, you have to manually include all the features of JakartaEE8 without jpa-2.2 and enable bells-1.0 . See the list below. <feature>appClientSupport-1.0</feature> <feature>appSecurity-2.0</feature> <feature>appSecurity-3.0</feature> <feature>batch-1.0</feature> <feature>beanValidation-2.0</feature> <feature>cdi-2.0</feature> <feature>concurrent-1.0</feature> <feature>distributedMap-1.0</feature> <feature>ejb-3.2</feature> <feature>ejbHome-3.2</feature> <feature>ejbLite-3.2</feature> <feature>ejbPersistentTimer-3.2</fea

AWS ACM PCA for AWS IoT and SSL Pinning

Photo by Micah Williams on Unsplash AWS ACM PCA ACM Private CA enables the creation of private certificate authority (CA) hierarchies, including root and subordinate CAs[2]. What is a certificate authority (CA)? A certificate authority (CA), also sometimes referred to as a certification authority, is a company or organization that acts to validate the identities of entities[1]. There are many companies in the world that are CAs. You can buy services from them and use them to enable HTTPS in your websites among other things. In your Browser's address bar, there is a padlock icon and by clicking on it you can see the CA for the certificate that is being used by the website you are in. Figure 1: CA The above diagram shows the root CA(Google Trust Services - GlobalSign Root CA-R2) for the blogger.com platform. These certificates were provided by a company called GlobalSign . You will also see that there are three certificates in the image in a hierarchical structure. More about th

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