Spring Boot With PostgreSQL On Heroku

In modern cloud-native applications, deploying backend services on platforms like Heroku and connecting them to managed databases such as PostgreSQL…

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The Classloading Graph: Why Your Spring Boot App’s Startup Time Is a Classloading Problem and Not a Bean Problem

Startup time is nearly always blamed on bean initialisation. The actual bottleneck is usually classloading — a graph traversal problem…

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Fixing Spring Boot Error “The Elements Were Left Unbound”

Spring Boot provides a flexible way to manage application configuration using external property files. However, when these properties are bound…

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JMS Messaging in Spring Boot Using JmsClient

Messaging plays an important role in building scalable, loosely coupled distributed systems. Instead of tightly coupling services via synchronous HTTP…

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Implementing API Versioning in Spring

APIs must evolve as business requirements change, but breaking existing consumers is rarely acceptable. A clear versioning strategy enables services…

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Java Commit with JdbcTemplate vs DataSource

In Spring-based Java applications, database access is commonly performed using JdbcTemplate or higher-level abstractions such as JPA. A frequent source…

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Apache POI HSSFWorkbook: Read, Write, and Stream Excel

Working with Excel files is a common requirement in enterprise Java applications, whether for reporting, data exchange, or bulk uploads.…

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Temporal Workflow Engine with Spring Boot

Temporal is a durable workflow engine designed for building reliable, fault-tolerant, and scalable distributed systems. Instead of managing complex business…

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Spring Boot vs Quarkus vs Micronaut: The Ultimate 2026 Showdown

The landscape of Java application development has evolved dramatically over the past few years. As cloud-native architectures, containerization, and serverless…

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