Gaurav Dubey, Author at Knoldus Blogs

Health endpoint for the Micronaut application

December 28, 2022January 4, 2023Java, java11Micronaut

Reading Time: 3 minutes 1. About Micronaut is an open-source JVM-based software framework for building lightweight, modular applications and microservices. It helps to create microservices with small memory footprints and quick startup time. We will create a Micronaut application using Java. You will learn how to use the Micronaut Management feature to enable your application’s “health” endpoint. 2. Pre-requisite 3. Development To create a Micronaut project just navigate to https://micronaut.io/launch/ and create Continue Reading

Groovy CRUD Web App Using Micronaut

November 25, 2022November 30, 2022Javajava, Micronaut

Reading Time: 3 minutes 1. About 1.1 Introduction Micronaut is an open-source JVM-based software framework for building lightweight, modular applications and microservices. It helps to create microservices with small memory footprints and quick startup time. 2. Use Case Let’s take a use case. We are going to create a web app with the help of Groovy and Micronaut to perform CRUD operations. For that, we have to implement the CRUD Continue Reading

Visualizing data - abstract purple background with motion blur, digital data analysis concept

Distributed tracing with Micronaut framework

October 21, 2022October 25, 2022Javadistributed tracing with micronaut, Micronaut

Reading Time: 7 minutes 1. About 1.1 Micronaut Micronaut is an open-source JVM-based software framework for building lightweight, modular applications and microservices. It helps to create microservices with small memory footprints and quick startup time. 1.1 Distributed tracing Troubleshooting interactions between microservices in a distributed architecture can be challenging when operating microservices in production. There are variously distributed tracing solutions, the most popular of which are Zipkin and Jaeger, Continue Reading

Developing programming and coding technologies working in a software engineers.

Apache Camel Exception Re-try Policy

September 29, 2022October 19, 2022Javaapache-camel, apache-camel-redelivery-policy, apache-camel-retry, re-try policy

Reading Time: 4 minutes Apache Camel is a rules-based routing and arbitration engine that provides a Java object-based implementation of the Enterprise Integration Pattern, using an API (or Declarative Java Domain Specific Language) to configure routing and arbitration rules. We can implement exception handling in two ways Using Do Try block and OnException block . A re-try policy defines rules when Camel Error Handler perform re-try attempts. e.g you can setup Continue Reading

Introduction to EventStoreDB

September 29, 2022October 19, 2022Javaintroduction to eventStoreDB, what is eventStoreDB

Reading Time: 4 minutes EventStoreDB is an event sourcing database that stores your critical data in streams of immutable events. It was built from the ground up for Event Sourcing and offers an unprecedented solution for building event-sourced systems. It offers a low-level protocol in the form of an asynchronous TCP protocol that exchanges protobuf objects. Protobuf is a binary data-interchange format developed by Google, while JSON is the Continue Reading

EventStoreDB vs Kafka

September 29, 2022October 19, 2022Javaeventstoredb, eventStoredb vs kafka

Reading Time: 5 minutes There is a lot of confusion in the community regarding EventStoreDB and Kafka – especially when it comes to event sourcing. Developers are confused to deciding which technology they should use. How they compare and what are the balance factor that they will have to make. This article helps you to understand, what the two solutions offer, how to use them effectively. First we need Continue Reading

Event Sourcing with SpringBoot

September 29, 2022October 19, 2022Javaeventsourcing, eventsourcing with springboot

Reading Time: 5 minutes The name directly comes from the fact that event sourcing events are the source of truth. So all of the other data and other data structures are just derived from the events. So we can erase in theory all of those other storages as long as we keep event lock then we can always regenerate them. Event sourcing contains a ordered of our operation so Continue Reading

Exception Handling in Apache Camel using Spring

April 12, 2022April 12, 2022Apache Camel, Javaexception handling in apache camel, exception handling using DSL in apache camel

Reading Time: 3 minutes Apache Camel is a rule-based routing and mediation engine that provides a Java object-based implementation of the Enterprise Integration Patterns using an API (or declarative Java Domain Specific Language) to configure routing and mediation rules. In this post we will implement Exception Handling in Apache Camel using Spring. Features of Apache Camel Apache camel is a lightweight framework. It provides us with a number of components. Continue Reading

Spring Cloud Gateway Pre and Post Filters

March 24, 2022March 24, 2022Javapre-and-post-filter-in-spring-c;loud-gateway, spring-cloud-gateway-filters

Reading Time: 4 minutes Spring Cloud Gateway Spring Cloud Gateway provides a flexible way of routing requests based on a number of criteria, as well as focuses on cross-cutting concerns such as security, resiliency, and monitoring. An API gateway allows you to implement the complexity separately from the client, moving that responsibility from user side to server side. All the client needs to know is how to talk to the gateway. It Continue Reading

Spring Cloud Gateway Custom Filter

February 23, 2022February 23, 2022Java, Spring Cloud Gatewayspring-cloud-gateway, spring-cloud-gateway-custom-filter, spring-cloud-gateway-filter

Reading Time: 4 minutes Spring Cloud Gateway Spring Cloud Gateway provides a library for building API gateways on top of Spring and Java. It provides a flexible way of routing requests based on a number of criteria, as well as focuses on cross-cutting concerns such as security, resiliency, and monitoring. An API gateway allows you to implement the complexity separately from the client, moving that responsibility from user side Continue Reading

Object creation in Spring

December 29, 2021December 29, 2021Javadependency injection in sping, object creation in spring

Reading Time: 3 minutes In spring IOC container deals with Object creation, Dependency satisfaction, and Life-cycle Management. It states that application programmers should only be concerned with the use of objects. Object creation and their management should be handled by an IOC container. The delegation of responsibility from the programmer to the IOC container is known as Inversion Of Control. IOC container can create bean in two ways Directly, Continue Reading

Introduction to Spring MVC

November 30, 2021November 30, 2021Javaintroduction to spring mvc, Spring, spring mvc

Reading Time: 3 minutes Spring is the most commonly used framework in Java. It is a general purpose framework i.e it can be used in console applications, desktop applications, web applications, or web services. It is a modular framework i.e it contains different module. Core module : Provides basic IOC implementation web-mvc : Provides an mvc based framework for developing dynamic web-application. ORM-module : Facilitate integration to the framework Continue Reading

Introduction to Resilience4j

November 15, 2021November 15, 2021Java, Microservicesresilience4j, resilience4j-intro, technology

Reading Time: 3 minutes Resilience4j is a fault tolerance library designed for Java 8 and functional programming. It is lightweight, modular and really fast. We will talk about its modules and functionality later, but first, let’s discuss it briefly. Fault Tolerance The ability of some components of a system to function properly in the event of a failure. It sounds simple, but it is not that easy to achieve, Continue Reading