Apache Kafka is a popular distributed message broker designed to handle large volumes of real-time data. A Kafka cluster is highly scalable and fault-tolerant. It also has a much higher throughput compared to other message brokers like ActiveMQ and RabbitMQ. Though it is generally used as a publish/subscribe messaging system, many organizations also use it for log aggregation because it…
Being able to install Node.js on Ubuntu or another OS is a boon for JavaScript users worldwide. Learning one language that would serve all your development needs is a goldmine in the tech world. Before Node.js, the JavaScript folks were compelled to learn a second language that helped them perform all their backend activities, a…
how to fixed react native whats wrong issues sdk.dir=/home/kali/Android/Sdk React Native is a great framework for building native mobile apps, but it can be a bit tricky to troubleshoot when things go wrong. Here are a few tips on how to fix React Native “what’s wrong” issues: how to fixed react native whats wrong issues…
Dockerizing a Spring Boot application is a great way to make it portable and easy to deploy. Here are the steps involved: Dockerizing a Spring Boot Application Create a Dockerfile. The Dockerfile is a text file that tells Docker how to build your image. Build the image. Once you have a Dockerfile, you can build…
The error “Could not find or load main class” can occur when you’re trying to build a REST Spring app with Gradle. There are a few things you can check to try to fix this error: Gradle building rest spring app can’t find main class Make sure that the main class for your application is…
Installing Jenkins The version of Jenkins included with the default Ubuntu packages is often behind the latest available version from the project itself. how to install Jenkins on Linux Debian/Ubuntu curl -fsSL https://pkg.jenkins.io/debian-stable/jenkins.io.key | sudo tee \ /usr/share/keyrings/jenkins-keyring.asc > /dev/null echo deb [signed-by=/usr/share/keyrings/jenkins-keyring.asc] \ https://pkg.jenkins.io/debian-stable binary/ | sudo tee \ /etc/apt/sources.list.d/jenkins.list > /dev/null …
Feign is a declarative REST client developed by Netflix. It makes writing REST clients easier by providing a simple API that allows you to define the endpoints you want to call and the parameters you want to pass. Feign automatically generates the HTTP requests and responses, so you don’t have to worry about the low-level…
A relationship is a connection between two types of entities. In the case of a many-to-many relationship, both sides can relate to multiple instances of the other side. Many-To-Many Relationship in JPA Note that it’s possible for entity types to be in a relationship with themselves. Think about the example of modeling family trees: Every…
MySQL supports foreign keys, which permit cross-referencing related data across tables, and foreign key constraints, which help keep the related data consistent. A foreign key relationship involves a parent table that holds the initial column values, and a child table with column values that reference the parent column values. A foreign key constraint is defined…
In this tutorial, we will learn how to implement step-by-step one-to-many bidirectional entity mapping using JPA and Hibernate, and the MySQL database. JPA Hibernate One to Many Bidirectional Mapping Example The @OneToMany and @ManyToOne JPA annotations are used to link one-to-many bidirectional entity mapping. There are two types of one-to-many associations – Unidirectional → In this type of association, only the…
