In the previous posts we build few micro services (Order Service, Product Service, Customer Service) for an order management system using Docker and Spring Boot. We used Netflix libraries to manage, discover and load balance the micro services. Managing these micro services and their multiple containers could get a bit tricky; especially in terms of Scalability, Observability, Security, Monitoring and ...

In the previous post we created our first micro service “ProductService” using SpringBoot and Docker. In this part we will go into details of how to manage multiple microservices using Spring Cloud, netflix libraries, API gateways . For our order management system, let’s say,  a minimal relationship could be something like this : So, let’s build 2 more services called “orderService” ...

In this series of workshop we will build few micro services using spring boot, docker and then deploy them into kubernetes. So, Lets get started. First we need to define a problem statement to begin with. Lets say we want to build a order management system. Identifying domains First step would be to understand what domains are required, for simplicity ...

One of the most important features of Kafka is to do load balancing of messages and guarantee ordering in a distributed cluster, which otherwise would not be possible in a traditional queue. Lets first try and understand the problem statement Let us assume we have a topic where messages are sent and there is a consumer who is consuming these ...

In this blog, we are going to see how to deploy a Spring boot application on Amazon ElasticBeanstalk. Amazon ElasticBeanstalk has a preconfigured Java environment, which could be used to deploy a Spring Boot JAR which has the servlet container inside it. For our example, we will use maven as the build tool here. Step 1 : The first step ...

In the previous blogs we built the landing page using Thymeleaf, Bower and Bootstrap and deployed it to Heroku. In this blog we will introduce some functionality with AngularJS for front end and Spring Boot Webservices at backend. We will begin with Login/Logout section. Lets begin with installing AngularJS in our application using bower. Introducing AngularJS $ bower install angular --save ...

In this series of blogs we are building a complete web app using Springboot,Angular, etc. In the last blog, we made a basic landing page with Thymeleaf. In this blog we will introduce bower, which is used to manage front end dependencies like CSS,JS. 1.) Bower Install bower using this link. After bower is installed, we need to configure it to use ...

In this series of blog posts we will be building a complete responsive web application using the following tech stack : 1) Spring boot – Spring MVC web – Spring Data JPA – Spring Security 2) Thymeleaf for server side templating 3) Angular JS for client side MVC ( including JS dependency management with bower) 4) Deploy the app on ...

Today we will try to understand Strategy Pattern with the help of an example. The example we will consider is The Game of Chess. The intention here is to explain strategy pattern and not to build a comprehensive Chess Game solution. Strategy Pattern : The Strategy pattern is known as a behavioural pattern – it’s used to manage algorithms, relationships ...