Blogs

🔹 What is Spring Data Redis? Spring Data Redis provides easy integration with Redis, an in-memory key-value store. It abstracts the low-level Redis API and gives you repositories, templates, pub/sub messaging, and caching support. 🔹 Maven Dependency Add this to your pom.xml: <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-data-redis</artifactId> </dependency> <dependency> <groupId>io.lettuce</groupId> <artifactId>lettuce-core</artifactId> <!-- Lettuce is the default…

Feign is a declarative REST client in Spring Cloud that makes writing web service clients easier. Instead of writing boilerplate RestTemplate or WebClient code, you define an interface and annotate it — Spring generates the implementation for you at runtime. Here’s a step-by-step example of using Feign Client in Spring Boot: 1. Add dependencies…

1. Add Dependencies If you’re using Maven, add the following to your pom.xml: <dependencies> <!-- Spring Boot Starter Web --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- GraphQL Starter --> <dependency> <groupId>com.graphql-java</groupId> <artifactId>graphql-spring-boot-starter</artifactId> <version>5.0.2</version> </dependency> <!-- GraphQL Tools (schema parsing) --> <dependency> <groupId>com.graphql-java-kickstart</groupId> <artifactId>graphql-java-tools</artifactId> <version>11.0.0</version> </dependency> <!-- Optional: GraphiQL UI --> <dependency> <groupId>com.graphql-java-kickstart</groupId> <artifactId>graphiql-spring-boot-starter</artifactId> <version>11.1.0</version> </dependency>…

1. Setup your Spring Boot project You can generate a Spring Boot project via Spring Initializr with the following dependencies: Spring Web (optional for testing REST endpoints) gRPC (we’ll add via Maven) Protobuf (for compiling .proto files) Lombok (optional, for boilerplate reduction) Your pom.xml should include: <dependencies> <!-- Spring Boot Starter --> <dependency> <groupId>org.springframework.boot</groupId>…

In Spring Boot, RestTemplate is used to make synchronous HTTP requests to other services (GET, POST, PUT, DELETE). Although Spring recommends using WebClient for reactive applications, RestTemplate is still widely used in many projects. Here's a clear example: 1. Add Dependencies If you are using Maven, make sure you have Spring Web dependency: <dependency>…

WebSocket STOMP refers to using the STOMP protocol (Simple/Streaming Text Oriented Messaging Protocol) over a WebSocket connection. Here’s the breakdown: 1. WebSocket A communication protocol that provides full-duplex, bidirectional communication between client and server over a single TCP connection. Unlike HTTP (request-response), WebSockets let the server push messages to the client in real time.…

1. What are Spring Boot Profiles? Spring Boot profiles allow you to group configuration settings for different environments and activate the one you need at runtime. This helps manage multiple environments without changing code. For example: dev → development environment settings test → testing environment settings prod → production environment settings 2. How to…

1. Add Dependencies In your pom.xml (for Maven), include Spring Boot and Springdoc OpenAPI: <dependencies> <!-- Spring Boot Web --> <dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-web</artifactId> </dependency> <!-- Springdoc OpenAPI --> <dependency> <groupId>org.springdoc</groupId> <artifactId>springdoc-openapi-starter-webmvc-ui</artifactId> <version>2.2.0</version> </dependency> <!-- Optional: Lombok for cleaner code --> <dependency> <groupId>org.projectlombok</groupId> <artifactId>lombok</artifactId> <optional>true</optional> </dependency> </dependencies> <dependencies> <!-- Spring Boot Web --> <dependency> <groupId>org.springframework.boot</groupId>…

📌 What is SOAP Web Service? SOAP (Simple Object Access Protocol) is a protocol for exchanging structured information in web services. In Spring Boot, you can create SOAP web services using Spring Web Services (Spring-WS). 🚀 Example: Spring Boot SOAP Web Service 1. Add Dependencies (pom.xml) For a Maven project, add: <dependencies> <!-- Spring…

1. Bean Creation Life Cycle in Spring A Spring Bean is an object managed by the Spring IoC container. Its lifecycle goes through several stages: Lifecycle Steps: Instantiation – Spring creates the bean (via constructor or factory method). Populate Properties – Dependencies are injected (setter/field/constructor injection). BeanNameAware / BeanFactoryAware – If implemented, Spring calls…