Enterprise Java
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Getting Started with WebDriverManager
Selenium WebDriver is a widely used framework for browser automation, but managing browser drivers manually can be time-consuming and error-prone…
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Spring AI 2.0 + MCP: Building a Tool-Calling Agent in 50 Lines
Spring AI 2.0-M6, shipped May 8, 2026, is the milestone where building an MCP tool-calling agent in Java stops feeling…
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Why Your Integration Tests Are Slower Than They Should Be: The Spring Context Cache You Don’t Know You’re Misusing
Every JCG article recommends @SpringBootTest for integration testing. Almost none explain the context cache model underneath it — how a single misplaced @DirtiesContext,…
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Database Indexing Mistakes That Senior Java Developers Still Make in 2026: A Deep Dive With PostgreSQL and Hibernate
You’ve shipped dozens of services. You know what a B-tree is. Yet your PostgreSQL queries are still crawling at 3…
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String Deduplication Is On By Default in G1 — And Most Developers Don’t Know What It Does
A granular look at what the JVM is quietly doing with your strings at the native level, when that work…
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The Database Migration Risk That Hibernate Silently Creates
Why hbm2ddl.auto=update is still in production codebases — and what to do about it Somewhere in a production codebase right now, Hibernate…
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Understanding OAuth 2.0 Token Exchange
In modern software architectures, especially microservices-based systems, authentication is no longer a simple “login once, use everywhere” problem. A single…
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A Complete Guide to MFA in Spring Security 7
Multi-Factor Authentication (MFA) is a security mechanism that requires users to verify their identity using multiple authentication methods before gaining…
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Understanding Spring Data AOT Repositories
Spring Boot 3 introduced several enhancements for cloud-native and native-image applications. One of the most important optimizations is AOT (Ahead-of-Time)…
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