> For the complete documentation index, see [llms.txt](https://rajadilipkolli.gitbook.io/my-spring-boot-experiments/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://rajadilipkolli.gitbook.io/my-spring-boot-experiments/readme.md). # README [![License: MIT](https://img.shields.io/badge/License-MIT-yellow.svg)](https://opensource.org/licenses/MIT) ## Spring Boot Integration Experiments This repository contains a collection of sample projects and experiments showcasing various Spring Boot integrations and features. The goal is to help you explore new possibilities, demonstrate best practices, and provide ready-to-use examples. *** ### Table of Contents * [Overview](#overview) * [Projects](#projects) * [Tech Stack](#tech-stack) * [Useful Docker Commands](#useful-docker-commands) * [Useful git Commands](#useful-git-commands) *** ### Overview Each subdirectory in this repository demonstrates a focused aspect of Spring Boot development ranging from database integrations, caching, messaging, and multi-tenancy to advanced topics like Chaos Engineering and observability. **Key Features**: 1. **Wide Range of Integrations**: Explore different databases (MySQL, PostgreSQL, MongoDB, Oracle), caching with Redis, and advanced topics like multi-tenancy. 2. **Observability & Monitoring**: Many samples include Prometheus, Grafana, or Kibana. They demonstrate setting up and analyzing application performance in real-time. 3. **Scalability & Resilience Patterns**: Investigate Chaos Monkey for injecting controlled failures, or look at multi-database solutions for horizontal scaling. *** ### Projects Below is a quick lookup table summarizing each sub-project. For more details, check their individual README.md files. | Name | Description | | -------------------------------------------------------------------------------------------------------------------------------------------------- | ----------------------------------------------------------------------------------------------------------- | | [Spring Batch Implementation](/my-spring-boot-experiments/batch-boot-jpa-sample.md) | Demonstrates how to use Spring Batch 5 with a straightforward configuration. | | [Archunit Implementation](/my-spring-boot-experiments/boot-api-archunit-sample.md) | Shows how to enforce architectural constraints in a Spring Boot project using ArchUnit. | | [Chaos Engineering Principles](/my-spring-boot-experiments/boot-chaos-monkey.md) | Covers applying Chaos Engineering with Spring Boot, along with performance tests. | | [Grafana LGTM](https://github.com/rajadilipkolli/my-spring-boot-experiments/blob/main/boot-grafana-lgtm/README.md) | Demonstrates an observability stack with Loki, Grafana, Tempo, and Mimir. | | [HTTP Proxy Implementation](/my-spring-boot-experiments/httpclients/boot-http-proxy.md) | Implements HTTP proxy functionality for routing and managing HTTP requests. | | [JMH Benchmark](/my-spring-boot-experiments/jmh-benchmark.md) | Provides microbenchmarking capabilities using JMH for measuring code performance. | | [Mongodb and Elasticsearch Reactive integration](/my-spring-boot-experiments/boot-mongodb-elasticsearch.md) | Illustrates storing data in MongoDB, then retrieving it using reactive Elasticsearch. | | [OpenAPI Implementation](/my-spring-boot-experiments/open-api-spring-boot.md) | Demonstrates OpenAPI specification generation and documentation using Swagger. | | [Opensearch Integration](/my-spring-boot-experiments/boot-opensearch-sample.md) | Showcases saving data and performing swift geospatial searches in OpenSearch. | | [Rabbit Mq Implementation](/my-spring-boot-experiments/boot-rabbitmq-thymeleaf.md) | Demonstrates RabbitMQ producer acknowledgments, a Dead Letter Queue setup, and more. | | [Rest API Documentation with examples](/my-spring-boot-experiments/boot-rest-docs-sample.md) | Highlights generating PDF documentation of RESTful APIs using Spring REST Docs. | | [RestClient Implementation](/my-spring-boot-experiments/httpclients/boot-restclient.md) | Introduces Spring 6's RestClient as a modern alternative to WebClient/RestTemplate. | | [RestTemplate Implementation](/my-spring-boot-experiments/httpclients/boot-rest-template.md) | Shows how to use Spring's RestTemplate for making HTTP requests to RESTful services. | | [Implementation of Strategy Design Pattern](https://github.com/rajadilipkolli/my-spring-boot-experiments/blob/main/boot-strategy-plugin/README.md) | Uses the Strategy Pattern within a Spring application, builds a native image. | | [Feature Toggles](/my-spring-boot-experiments/boot-togglz-sample.md) | Demonstrates toggling specific features on or off at runtime in a Spring Boot application. | | [Ultimate Redis Implementation](/my-spring-boot-experiments/boot-ultimate-redis.md) | Explores multiple Redis usage patterns with varying time-to-live (TTL) settings. | | [WebClient MVC Implementation](/my-spring-boot-experiments/httpclients/boot-web-client-mvc.md) | Demonstrates using WebClient with Spring MVC for HTTP operations. | | [WebClient WebFlux Implementation](/my-spring-boot-experiments/httpclients/boot-web-client-webflux.md) | Shows WebClient usage with WebFlux for reactive HTTP operations. | | [Graph QL implementation using QueryDSL](/my-spring-boot-experiments/graphql/boot-graphql-querydsl.md) | Illustrates integrating GraphQL with QueryDSL to interact with a database. | | [Graph QL implementation using webflux](/my-spring-boot-experiments/graphql/boot-graphql-webflux.md) | Showcases using GraphQL alongside the reactive WebFlux stack for asynchronous processing. | | [Graph QL implementation using webmvc](/my-spring-boot-experiments/graphql/boot-graphql-webmvc.md) | Demonstrates applying GraphQL concepts with the traditional Spring MVC for synchronous processing. | | [Custom SequenceNumber and LazyConnectionDataSourceProxy](/my-spring-boot-experiments/jpa/boot-data-customsequence.md) | Highlights creating custom sequence generators and optimizing database connections. | | [Hibernate Envers Implementation using spring data JPA](/my-spring-boot-experiments/jpa/boot-data-envers.md) | Shows how to track entity revisions with Hibernate Envers and monitor system changes. | | [Connecting to multiple data sources](/my-spring-boot-experiments/jpa/boot-data-multipledatasources.md) | Demonstrates configuring multiple SQL databases in a single Spring Boot application. | | [Hibernate 2nd Level Cache Using Redis](/my-spring-boot-experiments/jpa/boot-hibernate2ndlevelcache-sample.md) | Explains configuring Hibernate's second-level caching via Redis and testing it. | | [JNDI Sample](/my-spring-boot-experiments/jpa/boot-jndi-sample.md) | Demonstrates JNDI usage with embedded Tomcat and Hikari DataSource. | | [JPA with JOOQ](/my-spring-boot-experiments/jpa/boot-jpa-jooq-sample.md) | Shows how to use both JPA and JOOQ in the same application for database operations. | | [JPA Locks](/my-spring-boot-experiments/jpa/boot-jpa-locks.md) | Demonstrates database locking mechanisms and transaction isolation levels. | | [Read Replica Postgres with connection optimization](/my-spring-boot-experiments/jpa/boot-read-replica-postgresql.md) | Illustrates writing data to a primary Postgres database, then reading from a replica. | | [KeySet pagination and dynamic search with Blaze](/my-spring-boot-experiments/jpa/blaze-persistence.md) | Implements keyset pagination using Blaze Persistence, adding dynamic query features. | | [KeySet pagination and dynamic search with spring data jpa](/my-spring-boot-experiments/jpa/boot-data-window-pagination.md) | Implements keyset pagination using Spring Data JPA, enabling dynamic queries. | | [MultiTenancy with multipledatsources](/my-spring-boot-experiments/jpa/multitenancy/multidatasource-multitenancy.md) | Provides examples of running multi-tenant applications under different strategies. | | [MultiTenancy DB Based](/my-spring-boot-experiments/jpa/multitenancy/multitenancy-db.md) | Demonstrates having each tenant use a separate database (while sharing the same codebase). | | [MultiTenancy Partition Based](/my-spring-boot-experiments/jpa/multitenancy/partition.md) | Shows how to share a single database and table across tenants using a partitioning strategy. | | [MultiTenancy Schema Based](/my-spring-boot-experiments/jpa/multitenancy/schema.md) | Demonstrates isolating tenants by allocating a separate schema for each tenant. | | [Reactive SQL With JOOQ](/my-spring-boot-experiments/r2dbc/boot-jooq-r2dbc-sample.md) | Explains performing reactive CRUD operations in Spring Boot using jOOQ. | | [PostgreSQL JSON and ENUM column support using reactive](/my-spring-boot-experiments/r2dbc/boot-r2dbc-json-column.md) | Demonstrates PostgreSQL JSON and ENUM column support in a reactive application. | | [PostgreSQL Notify/Listen](/my-spring-boot-experiments/r2dbc/boot-r2dbc-notify-listen.md) | Shows how to implement PostgreSQL's NOTIFY/LISTEN feature using R2DBC. | | [Reactive Cache with Redis](/my-spring-boot-experiments/r2dbc/boot-r2dbc-reactive-cache.md) | Demonstrates caching reactive database operations in Redis to boost performance. | | [Reactive Application](/my-spring-boot-experiments/r2dbc/boot-r2dbc-sample.md) | Illustrates an end-to-end reactive CRUD workflow in Spring Boot using R2DBC. | | [BackgroundJobs and Scheduling using Jobrunr](/my-spring-boot-experiments/scheduler/boot-scheduler-jobrunr.md) | Sets up background job scheduling with [Jobrunr](https://www.jobrunr.io/en/). | | [Scheduling using Quartz](/my-spring-boot-experiments/scheduler/boot-scheduler-quartz.md) | Showcases the [Quartz Scheduler](https://www.quartz-scheduler.org/), providing job scheduling capabilities. | | [Scheduling using Database Distributed Locks with ShedLock](/my-spring-boot-experiments/scheduler/boot-scheduler-shedlock.md) | Demonstrates scheduling while ensuring only one active job running at a time using ShedLock. | *** ### Tech Stack This repository leverages a broad stack of technologies, including: * **Java** / **JavaScript** / **SQL** for core logic & data. * **Spring Framework** (Boot, Data, Security, etc.) as the key application framework. * **Project Reactor** for reactive data flows and concurrency. * **QueryDSL**, **Liquibase**, **Flyway**, **JOOQ** for advanced database interactions and migrations. * **Docker**, **Docker Compose** for containerization and multi-service orchestration. * **RabbitMQ**, **Redis**, **Elasticsearch**, **OpenSearch**, **MongoDB** for messaging, caching, and search. * **Gradle** / **Maven** for builds and dependency management. * **GitHub Actions**, **CircleCI**, **Jenkins** for CI/CD pipelines. For in-depth version references, visit [techstack.md](https://github.com/rajadilipkolli/my-spring-boot-experiments/blob/main/techstack.md) or see individual project READMEs. *** ### Useful Docker Commands Start Postgres and pgAdmin ```shell docker compose up postgres pgadmin4 ``` Clean up everything using ```shell docker system prune -a -f --volumes ``` Claim unused volumes ```shell docker volume prune ``` Running container ```shell docker container ls ``` *** ### Useful git Commands How to overwrite local changes with git pull Stash local changes: ```shell git stash ``` Pull changes from remote: ```shell git pull ``` How to revert the changes that are pushed to remove ```shell git revert $hash ```