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Programmer DD
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Programmer DD

A tinkering programmer and author of "Spring Cloud Microservices in Action"

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Recent Articles

Latest from Programmer DD

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Programmer DD
Programmer DD
Oct 23, 2025 · Backend Development

Why Jackson Serialization Can Drain Your CPU and How to Fix It

The article reveals how default Jackson JSON serialization can become a hidden CPU bottleneck in high‑traffic Spring Boot services, explains why full entity objects inflate serialization time, and presents practical optimizations such as @JsonView, custom ObjectMapper settings, hand‑written serializers, and alternative data formats to dramatically cut latency and cloud costs.

JavaPerformance optimizationSpring Boot
0 likes · 13 min read
Why Jackson Serialization Can Drain Your CPU and How to Fix It
Programmer DD
Programmer DD
Oct 19, 2025 · Backend Development

Can Shorter Variable Names Speed Up Java? Surprising Benchmark Results

A recent study shows that deliberately shortening or misspelling Java variable names can reduce latency and increase throughput by up to 49%, revealing hidden performance costs in the JVM's string handling and prompting a data‑driven, selective naming strategy for high‑throughput systems.

JVMJavamicrobenchmark
0 likes · 8 min read
Can Shorter Variable Names Speed Up Java? Surprising Benchmark Results
Programmer DD
Programmer DD
Oct 19, 2025 · Backend Development

How to Add Free Edge TTS to Your Spring Boot Application in Minutes

This tutorial shows how to integrate UnifiedTTS's free Edge TTS service into a Spring Boot project, covering project setup, API key registration, configuration, request/response models, service implementation, unit testing, and runtime verification with sample code and images.

API integrationEdge TTSJava
0 likes · 9 min read
How to Add Free Edge TTS to Your Spring Boot Application in Minutes
Programmer DD
Programmer DD
Oct 13, 2025 · Artificial Intelligence

Running ONNX AI Inference Natively in Java Without Python

This article explains how enterprise architects can integrate ONNX‑based machine‑learning inference directly into Java applications, covering tokenizer integration, GPU acceleration, deployment patterns, and lifecycle management to achieve secure, scalable, and observable AI services without relying on Python runtimes.

AI inferenceEnterprise ArchitectureGPU
0 likes · 16 min read
Running ONNX AI Inference Natively in Java Without Python
Programmer DD
Programmer DD
Oct 12, 2025 · Backend Development

Boost Java Performance: Integrate CUDA GPU Acceleration via JNI

This guide explains why Java struggles with high‑performance or data‑intensive workloads, introduces GPU acceleration with CUDA, compares integration options such as JCuda, JNI, and JNA, walks through a practical encryption use case with performance benchmarks, and provides production‑grade best practices for memory, threading, testing, security, and deployment.

CUDAGPUJava
0 likes · 23 min read
Boost Java Performance: Integrate CUDA GPU Acceleration via JNI
Programmer DD
Programmer DD
Oct 10, 2025 · Artificial Intelligence

How to Build a Resilient Multi‑LLM Chatbot with Spring AI

This tutorial demonstrates how to integrate multiple large language models from different providers into a Spring Boot application using Spring AI, configure primary, secondary, and tertiary models, and implement a fallback mechanism with Spring Retry to ensure high availability of the chatbot.

JavaLLMResilience
0 likes · 12 min read
How to Build a Resilient Multi‑LLM Chatbot with Spring AI
Programmer DD
Programmer DD
Oct 3, 2025 · Operations

How Netflix Turned Incident Management into a Scalable Engineer‑Owned Process

This article explains how Netflix’s engineering teams shifted incident handling from a centralized SRE function to a company‑wide, engineer‑driven practice by selecting the right tooling, standardizing processes, and reshaping culture, enabling rapid, reliable responses for hundreds of millions of viewers.

NetflixSREcultural transformation
0 likes · 10 min read
How Netflix Turned Incident Management into a Scalable Engineer‑Owned Process
Programmer DD
Programmer DD
Sep 28, 2025 · Backend Development

How to Ensure Spring Boot Scheduled Tasks Run Only Once with ShedLock

Learn how to prevent duplicate execution of Spring Boot @Scheduled tasks in multi-instance deployments by integrating ShedLock, including Maven dependencies, H2 database setup, LockProvider configuration, and annotation usage to ensure each job runs only once across all nodes.

Distributed LockJavaShedLock
0 likes · 6 min read
How to Ensure Spring Boot Scheduled Tasks Run Only Once with ShedLock
Programmer DD
Programmer DD
Sep 26, 2025 · Backend Development

Spring Boot 4 & Spring Framework 7: Key Features, Code Samples, and Upgrade Guide

This article reviews the major enhancements in Spring Boot 4 and Spring Framework 7, covering baseline requirements, performance boosts, native image support, modularization, new annotations, API versioning, declarative HTTP clients, resilient method support, multiple TaskDecorators, and null‑safety improvements, with practical code examples to help developers plan their migration.

API versioningGraalVMJava 17
0 likes · 19 min read
Spring Boot 4 & Spring Framework 7: Key Features, Code Samples, and Upgrade Guide