https://Zirheyn.comRSS feed du bloghttps://Zirheyn.com/blog/host-your-own-api-accessible-llm-with-ollamahttps://Zirheyn.com/blog/host-your-own-api-accessible-llm-with-ollamaA practical guide to self-host an LLM with Ollama, expose it through an API, secure access, and integrate it with Spring Boot.Mon, 09 Jun 2025 00:00:00 GMThttps://Zirheyn.com/blog/clamav-wrapper-antivirus-scanning-apihttps://Zirheyn.com/blog/clamav-wrapper-antivirus-scanning-apiBuild a Spring Boot API that scans uploaded files with ClamAV (clamd) before storage, with size validation, streaming scan, scheduled signature updates, and Docker deployment guidance.Mon, 28 Apr 2025 00:00:00 GMThttps://Zirheyn.com/blog/understanding-restful-apis-a-guide-with-spring-boothttps://Zirheyn.com/blog/understanding-restful-apis-a-guide-with-spring-bootRESTful APIs (Representational State Transfer) are a cornerstone of modern software development. They enable communication between applications over HTTP, offering a scalable and stateless architecture. Whether you're buiThu, 13 Mar 2025 00:00:00 GMThttps://Zirheyn.com/blog/how-to-implement-key-authentication-in-a-spring-boot-apihttps://Zirheyn.com/blog/how-to-implement-key-authentication-in-a-spring-boot-apiIn modern API design, securing endpoints is a fundamental aspect of development. Using an API key in the header, such as "X-API-KEY," is a common practice for lightweight authentication. Here's how you can implement it inThu, 06 Mar 2025 00:00:00 GMThttps://Zirheyn.com/blog/jpa-specifications-in-spring-boot-pagination-and-dynamic-searchhttps://Zirheyn.com/blog/jpa-specifications-in-spring-boot-pagination-and-dynamic-searchSpring Boot simplifies application development by providing powerful integrations with Java frameworks, such as JPA (Java Persistence API). Among JPA’s many capabilities, the Specification API stands out as a robust toolSat, 22 Feb 2025 00:00:00 GMThttps://Zirheyn.com/blog/how-to-implement-caching-in-spring-boot-with-caffeinehttps://Zirheyn.com/blog/how-to-implement-caching-in-spring-boot-with-caffeineCaching is an essential optimization technique for improving the performance and responsiveness of an application. Spring Boot provides a simple way to integrate caching into your project, and by using Caffeine, you can lThu, 20 Feb 2025 00:00:00 GMThttps://Zirheyn.com/blog/introduction-to-h2-database-in-spring-boothttps://Zirheyn.com/blog/introduction-to-h2-database-in-spring-bootH2 is a fast, open-source, and lightweight database management system written in Java. It is particularly popular in development and testing environments due to its simplicity, small footprint, and the ability to run bothThu, 30 Jan 2025 00:00:00 GMThttps://Zirheyn.com/blog/understanding-jpa-projections-in-spring-boothttps://Zirheyn.com/blog/understanding-jpa-projections-in-spring-bootIn Spring Boot applications that use JPA (Java Persistence API), projections provide a powerful mechanism for retrieving only specific parts of an entity’s data. Instead of fetching the entire entity with all its fields,Wed, 29 Jan 2025 00:00:00 GMThttps://Zirheyn.com/blog/best-practices-for-restful-api-designhttps://Zirheyn.com/blog/best-practices-for-restful-api-designLearn best practices for designing RESTful APIs with Java Spring Boot, including correct use of HTTP methods, status codes, HATEOAS, pagination, and error handling.Mon, 27 Jan 2025 00:00:00 GMThttps://Zirheyn.com/blog/setting-up-postgresql-in-a-spring-boot-project-with-spring-data-jpahttps://Zirheyn.com/blog/setting-up-postgresql-in-a-spring-boot-project-with-spring-data-jpaPostgreSQL is a powerful, open-source relational database that pairs well with Spring Boot applications. This tutorial guides you through configuring PostgreSQL in a Spring Boot project using Spring Data JPA for seamlessMon, 20 Jan 2025 00:00:00 GMThttps://Zirheyn.com/blog/typosquatting-attacks-what-you-need-to-knowhttps://Zirheyn.com/blog/typosquatting-attacks-what-you-need-to-knowIn the digital age, where online platforms are integral to daily life, cybersecurity threats are evolving at an alarming pace. One such threat is **typosquatting**, a cybercrime tactic that exploits human error to deceiveWed, 15 Jan 2025 00:00:00 GMThttps://Zirheyn.com/blog/understanding-the-transactional-annotation-in-spring-boothttps://Zirheyn.com/blog/understanding-the-transactional-annotation-in-spring-bootThe `@Transactional` annotation is a cornerstone of Spring’s declarative transaction management. It allows developers to manage transactions efficiently without having to write verbose code. By simply annotating a methodTue, 14 Jan 2025 00:00:00 GMThttps://Zirheyn.com/blog/understanding-dtos-in-java-spring-boothttps://Zirheyn.com/blog/understanding-dtos-in-java-spring-bootIn Java Spring Boot development, **DTO** (Data Transfer Object) is a common design pattern used to transfer data between different layers of an application. This pattern is especially useful in complex systems where entitMon, 13 Jan 2025 00:00:00 GMThttps://Zirheyn.com/blog/guide-to-lombok-in-spring-boot-with-mavenhttps://Zirheyn.com/blog/guide-to-lombok-in-spring-boot-with-mavenWhen working with Java, you often encounter boilerplate code such as getters, setters, constructors, and equals/hashCode methods. Lombok is a powerful Java library that helps reduce this boilerplate code, making your codeFri, 10 Jan 2025 00:00:00 GMThttps://Zirheyn.com/blog/introduction-to-maven-in-a-java-spring-boot-projecthttps://Zirheyn.com/blog/introduction-to-maven-in-a-java-spring-boot-project[Apache Maven](https://maven.apache.org/) is a powerful build automation and dependency management tool widely used in Java development. When working on a Spring Boot project, Maven simplifies project setup, dependency maWed, 08 Jan 2025 00:00:00 GMThttps://Zirheyn.com/blog/swagger-simplifying-api-documentationhttps://Zirheyn.com/blog/swagger-simplifying-api-documentationSwagger, is an essential tool for documenting, describing, and interacting with RESTful APIs. It provides a graphical user interface that simplifies the understanding of endpoints, parameters, responses, and schemas usedMon, 06 Jan 2025 00:00:00 GMThttps://Zirheyn.com/blog/understanding-cors-and-how-to-handle-it-in-spring-boothttps://Zirheyn.com/blog/understanding-cors-and-how-to-handle-it-in-spring-bootCross-Origin Resource Sharing (CORS) is a security feature implemented by web browsers to control how resources on a web page can be requested from another domain. While it is essential for protecting users from maliciousMon, 30 Dec 2024 00:00:00 GMThttps://Zirheyn.com/blog/exploring-crt-sh-an-essential-resource-for-cybersecurityhttps://Zirheyn.com/blog/exploring-crt-sh-an-essential-resource-for-cybersecurityCybersecurity is constantly evolving, along with the tools that allow professionals to mitigate risks and protect their systems. Among these tools, crt.sh stands out as a powerful and free resource for exploring SSL/TLS cSat, 28 Dec 2024 00:00:00 GMThttps://Zirheyn.com/blog/securing-restful-apis-comprehensive-guidehttps://Zirheyn.com/blog/securing-restful-apis-comprehensive-guideIn an increasingly interconnected digital world, RESTful APIs serve as the backbone of communication between systems. However, their openness also makes them a prime target for malicious actors. Securing a RESTful API isThu, 26 Dec 2024 00:00:00 GMThttps://Zirheyn.com/blog/understanding-common-weakness-enumeration-cwehttps://Zirheyn.com/blog/understanding-common-weakness-enumeration-cweCommon Weakness Enumeration (CWE) is a comprehensive repository of software weaknesses that provides a standardized taxonomy for developers, security analysts, and organizations. Developed and maintained by the [MITRE CorThu, 26 Dec 2024 00:00:00 GMThttps://Zirheyn.com/blog/uptime-kuma-the-open-source-monitoring-solution-you-needhttps://Zirheyn.com/blog/uptime-kuma-the-open-source-monitoring-solution-you-needIn today's digital age, uptime monitoring has become essential for businesses and developers to ensure their websites, services, and applications remain available and reliable. Among the various tools available, **UptimeThu, 26 Dec 2024 00:00:00 GMThttps://Zirheyn.com/blog/what-is-credential-stuffinghttps://Zirheyn.com/blog/what-is-credential-stuffingIn today’s interconnected digital landscape, credential stuffing has emerged as a prevalent cybersecurity threat. This form of cyberattack exploits the growing issue of password reuse, targeting both individuals and organThu, 26 Dec 2024 00:00:00 GMThttps://Zirheyn.com/blog/coolify-the-open-source-self-hostable-alternative-to-heroku-netlify-and-vercelhttps://Zirheyn.com/blog/coolify-the-open-source-self-hostable-alternative-to-heroku-netlify-and-vercelIn the realm of modern application deployment, developers often turn to platforms like Heroku, Netlify, and Vercel for their simplicity and efficiency. However, these services can become expensive or lack the control someMon, 23 Dec 2024 00:00:00 GMThttps://Zirheyn.com/blog/introduction-to-ci-cd-in-software-developmenthttps://Zirheyn.com/blog/introduction-to-ci-cd-in-software-developmentCI/CD practices streamline software development by automating integration, testing, and deployment, leading to faster cycles, improved code quality, reduced risks, and enhanced collaboration, ultimately delivering value to customers more efficiently.Mon, 23 Dec 2024 00:00:00 GMThttps://Zirheyn.com/blog/primitive-types-and-wrapper-classes-in-javahttps://Zirheyn.com/blog/primitive-types-and-wrapper-classes-in-javaJava is a statically typed programming language that supports both primitive data types and objects. While primitive types are fundamental to the language, their object equivalents—known as wrapper classes—are critical foThu, 19 Dec 2024 00:00:00 GMThttps://Zirheyn.com/blog/understanding-cve-and-cvss-scores-essential-tools-in-cybersecurityhttps://Zirheyn.com/blog/understanding-cve-and-cvss-scores-essential-tools-in-cybersecurityIn today’s digital age, cybersecurity is paramount. As organizations increasingly rely on technology, identifying, quantifying, and mitigating vulnerabilities is crucial. Two critical tools in this effort are CVE (CommonThu, 19 Dec 2024 00:00:00 GMThttps://Zirheyn.com/blog/flyway-for-database-migrations-in-spring-boot-applicationshttps://Zirheyn.com/blog/flyway-for-database-migrations-in-spring-boot-applicationsDatabase migrations are a critical aspect of managing evolving software applications. As the application grows, database schemas often need adjustments such as adding tables, modifying columns, or introducing indexes. **FWed, 11 Dec 2024 00:00:00 GMThttps://Zirheyn.com/blog/overview-of-data-types-in-postgresqlhttps://Zirheyn.com/blog/overview-of-data-types-in-postgresqlPostgreSQL is a powerful and extensible relational database management system (RDBMS). It supports a wide range of data types that allow precise modeling of diverse information. Below is a detailed overview of PostgreSQLWed, 04 Dec 2024 00:00:00 GMThttps://Zirheyn.com/blog/glowroot-a-lightweight-and-powerful-open-source-apm-toolhttps://Zirheyn.com/blog/glowroot-a-lightweight-and-powerful-open-source-apm-toolGlowroot is an open-source Application Performance Monitoring (APM) tool designed to monitor and analyze the performance of Java applications. Known for its simplicity, lightweight nature, and non-intrusive design, GlowroSun, 01 Dec 2024 00:00:00 GMThttps://Zirheyn.com/blog/sending-emails-with-spring-boot-starter-mailhttps://Zirheyn.com/blog/sending-emails-with-spring-boot-starter-mailSpring Boot simplifies email sending by integrating JavaMail support through the **spring-boot-starter-mail** module.Fri, 29 Nov 2024 00:00:00 GMThttps://Zirheyn.com/blog/querying-json-in-postgresqlhttps://Zirheyn.com/blog/querying-json-in-postgresqlPostgreSQL is a powerful open-source relational database system that supports advanced data types, including **JSON** and **JSONB**. These types allow you to store and query semi-structured data efficiently, combining theMon, 25 Nov 2024 00:00:00 GMThttps://Zirheyn.com/blog/web-scraping-with-jsoup-in-a-spring-boot-projecthttps://Zirheyn.com/blog/web-scraping-with-jsoup-in-a-spring-boot-projectPractical guide to configure and use Jsoup in a Spring Boot project to fetch and manipulate HTML data.Sat, 23 Nov 2024 00:00:00 GMThttps://Zirheyn.com/blog/encryption-with-pgcrypto-in-postgresqlhttps://Zirheyn.com/blog/encryption-with-pgcrypto-in-postgresqlThe `pgcrypto` module in PostgreSQL provides cryptographic functions for encrypting and decrypting data. It supports both symmetric encryption (using a single key) and public-key encryption (using a pair of keys). It's paThu, 21 Nov 2024 00:00:00 GMT