Configuring Multiple Databases in a Single Spring Boot Application

source : innovationm.co

In many enterprise applications, there is often a need to connect to multiple databases. This can be due to a variety of reasons such as different data storage requirements, integrating legacy systems, or microservices architecture. Spring Boot, with its powerful abstraction and configuration capabilities, makes it relatively straightforward to connect to multiple databases. This article will guide you through the steps to configure multiple databases in a single Spring Boot application, with ample code examples to illustrate the implementation.

Prerequisites

• Basic knowledge of Spring Boot
• JDK 8 or later installed
• Maven or Gradle build tool

Project Setup

To start with, we need to create a Spring Boot project. You can create a new project using Spring Initializr.

Include the following dependencies:

<dependencies>
    <dependency>
        <groupId>org.springframework.boot</groupId>
        <artifactId>spring-boot-starter-data-jpa</artifactId>
    </dependency>
    <dependency>
        <groupId>com.h2database</groupId>
        <artifactId>h2</artifactId>
        <scope>runtime</scope>
    </dependency>
    <dependency>…