Knoldus Blogs

Apache Camel overview and Integration Apache Camel with Spring Boot

May 27, 2022May 27, 2022Apache CamelApache Camel, springboot

Reading Time: 3 minutes Introduction Camel is an open-source integration framework designed to make integrating systems simple and easy. It uses URIs to enable easier integration with all types of transport or messaging model including HTTP, ActiveMQ, JMS, JBI, SCA, MINA, or CXF together with working with plug-gable Data Format options. Camel is a undersized library that has minimal dependencies for painless embedding in any Java application. Apache Camel Continue Reading

Spring Boot: Launch your application in Google Cloud Platform (GCP)

May 25, 2022May 25, 2022GCP, spring boot, Spring CloudGcp, springboot

Reading Time: 4 minutes Google Cloud Platform provides a cloud computing services that run the Spring Boot application in the cloud environment in much simpler and seamlessly manner. In this blog we will talk about Google Cloud Platform and Spring boot and how users can deploy spring boot application in App Engine Google Cloud Platform. Google Cloud Platform (GCP): Google Cloud Platform is offered by Google, is a suite Continue Reading

Intro to Spring AOP

March 31, 2022March 31, 2022Java, Spring, spring bootjava, springboot

Reading Time: 2 minutes The world is a stage where all of us are artists and Constant learning is the foundation of success.In order to continue your learning with something new, here were are going to learn about working with Spring AOP.Here we will look at what AOP is, and what features we have with AOP. Let’s start with the intro first. Spring AOP AOP stands for Aspect-Oriented ProgrammingSpring Continue Reading

Intro to Spring Reactor: Part 1

March 29, 2022March 29, 2022Java, Microservices, reactive programing, Reactive Programming, Spring, spring bootJava8, Microservices, Reactive Programming, Spring Reactor, springboot

Reading Time: 2 minutes The world is a stage where all of us are artists and Constant learning is the foundation of success.In order to continue your learning with something new, here were are going to learn about Spring Reactor. Let’s start with the basics about what is Reactive Programming first. Reactive Programming It’s important to understand the difference between reactive programming and reactive systems. We use both these Continue Reading

Build your first web application in Spring-boot

December 22, 2021December 22, 2021spring bootjava, springboot

Reading Time: 2 minutes Spring and Spring Boot:Spring Framework could be a Java platform that has comprehensive infrastructure supportfor developing Java applications. Spring Boot makes it easy to create stand-alone, production-grade Spring based Applications that you can “just run”. If you use Gradle, add the following dependency to your build.gradle file: If you use Maven, add the following dependency to your pom.xml file:https://mvnrepository.com/artifact/org.springframework.boot/spring-boot Now run the service with curl (in a separate terminal Continue Reading

Springboot all possible ways to read props from Configuration file.

October 15, 2021May 23, 2022Java, Spring, spring bootConfiguration, springboot

Reading Time: 2 minutes Springboot YML/ Properties file Various properties can be specified inside your application.properties file or inside your application.yml file, the following ways to reading properties from YML or Properties file. Reading a single property Read bunch of properties then use can use @ConfigurationProperties. Read entire YML/Property file Visit following URL and here you can find more properties:https://docs.spring.io/spring-boot/docs/1.1.6.RELEASE/reference/html/common-application-properties.htmlhttps://docs.spring.io/spring-boot/docs/current/reference/html/application-properties.html In my case i’m using YML file Reading a Continue Reading

Spring Security – A Starter Guide

October 5, 2021October 5, 2021spring boot, Studio-Scalaapplication, application level security, level, Security, Spring, spring security, spring security application, springboot, Web Application

Reading Time: 5 minutes spring security – authentication and authorization in detail Topics covered Basics of spring security What is spring security? What spring security can do? 5 core concepts of spring security and their detailed breakdown. Definition of Spring Security : The proper definition of spring security is: spring security is an application level security framework that provides ways to to apply application level security to the application. Continue Reading

Axon Part 2 : Structure, Spring Boot Integration and Server Setup

July 28, 2021July 28, 2021CQRS, MicroservicesAxon, Axon Framework, server, springboot

Reading Time: 4 minutes This is Part 2 of an ongoing series of blogs explaining Axon Framework. This blog is going to take you a step ahead and help you know more about the application directory structure to be followed. Also we’ll understand the spring boot integration for Axon. Additionally, this blog will have a quick Axon Server Setup Guide. Prerequisites: Go through the Axon Part 1 – An Continue Reading

Circuit Breaker in microservices : Istio

June 30, 2021June 30, 2021Java, Kubernetes, Microservices, Studio-DevOps, Tech BlogsCircuit Breaker, Devops, istio, kubernetes, Microservices, springboot

Reading Time: 4 minutes Hey guys,Today we’ll find out what circuit breakers are, why you should be using them in any distributed system or microservices architecture along with Istio. Why Circuit Breaker? We’ve got a series of microservices here that don’t have to be microservices ( in Kubernetes these will be pods, services, etc ). They’re going to be connected together in some way, a cascading failure is where Continue Reading

Getting Started – Spring Boot with MongoDB

June 30, 2021June 30, 2021spring bootapplication, Database, MongoDB, mongoDB crud, Spring, spring boot application, springboot

Reading Time: 6 minutes Spring Boot with MongoDB Topics to cover in Spring Boot and MongoDB In this blog we are going to see the beginning basics of what Spring Boot is? Ways to create Spring Boot Application? What is MongoDB? How to install MongoDB in Ubuntu? How to connect Spring Boot with MongoDB in Ubuntu? Let’s dive right in… What is Spring Boot? Spring Boot is a module Continue Reading

Resilience4j at a Glance

June 28, 2021July 1, 2021Microservicesbulkhead, Circuit Breaker, Microservices, Ratelimiter, resilience4j, springboot

Reading Time: 4 minutes Resilience4j at a Glance Scope of this article is applications based on microservice architecture. Let me begin with a question, what is most important non-functional requirement from any application? Undoubtedly the answer of this question will be ‘Robustness’. This means applications must behave reasonable with respect to adverse scenarios. Against all adverse scenarios application needs to take either corrective action or redirect to reasonable action Continue Reading

Querying Array of String using JPA Specification

December 22, 2020December 28, 2020Javajava, JPA, springboot

Reading Time: 2 minutes Writing dynamic queries using JPA Specification could be a hard to understand and implement but lets make it simple and easy to understand! To query array of string in postgreSQL , we might use a query like this : select * from employee where ARRAY_TO_STRING(keywords, ‘,’) LIKE ‘%lunch%’; To use specification for querying array string datatype ,we will have to Define a custom dialect to Continue Reading

Unit testing void methods with Mockito and JUnit

November 19, 2020Studio-ScalaJava8, Mocking, Mockito, springboot, test driven development, Testing, Unit Testing

Reading Time: 3 minutes Writing functionality is the main focus whenever we are writing a software program, but it is equally important that we make sure our code works the way we intended it to. And how do we do that? By writing unit test cases. They are used to test the smallest functionality of code. Unit test cases are an essential part of software development. In this blog, Continue Reading