Tag Archives: java

Running Spring Boot application with springdoc-openapi behind NGINX

Posted on April 25, 2025 by Siddharth Jain

Suppose you want all requests prefixed with /api to be forwarded by NGINX to spring boot. There are 2 common options: So when a request like GET /api/foo is made when it reaches spring boot, spring boot sees a request … Continue reading →

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Not able to play audio in Java

Posted on April 11, 2025 by Siddharth Jain
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Introducing Honeybadger.bot: Java Class Registry

Posted on June 10, 2024 by Siddharth Jain

What is the biggest pain point you encounter with Java development? For me, its debugging those ClassNotFound exceptions and not knowing what dependency I need to add to my pom.xml in order to use a class [1,2]. Fortunately there is … Continue reading →

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Spring Boot controller not working

Posted on April 30, 2024 by Siddharth Jain

Some tips to help you debug Spring controller not working. There can be many reasons why this can happen. Here is a checklist: In separate terminal window type: Now you want to set a breakpoint at org.springframework.context.annotation.ClassPathBeanDefinitionScanner.doScan: Then run the … Continue reading →

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Generics vs Interfaces in Java

Posted on February 4, 2024 by Siddharth Jain

There is an important lesson I realized w.r.t. using Generics vs. Interfaces in Java today. It has to do with this: Another benefit of using generics is that you don’t need to typecast all the time when using fields or … Continue reading →

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Persistent key-value store in Java

Posted on January 14, 2024 by Siddharth Jain

Sometimes you need to store key-value data (i.e., a dictionary, associative array or HashMap) in your application. Using a full blown RDMS can do it but is perhaps overkill. What you are looking for is instead a library that can … Continue reading →

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Understanding Internals of Project Loom: 10 Things You Should Know About Java Virtual Threads

Posted on December 17, 2023 by Siddharth Jain

TL;DR: Where to go from here:

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How to read/write HDF5 files in Java

Posted on November 6, 2023 by Siddharth Jain

there are 2 things you need for this: WARNING: You will need JDK 20 because the Java wrapper has been compiled with JDK 20 (when I wrote this blog post). If you have earlier version of JDK you will get … Continue reading →

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Java vs. Node.js: Performance comparison of blocking vs. non-blocking I/O

Posted on December 5, 2022 by Siddharth Jain

There are many online articles touting the advantages of non-blocking I/O over blocking I/O. But I wanted to see the difference for myself. So to do that, I developed an application two ways: one using Spring WebMVC + JPA which … Continue reading →

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Step by step guide to profiling Java applications with VisualVM

Posted on November 20, 2022 by Siddharth Jain

VisualVM is a great tool to profile your Java applications. Here I describe the steps I followed to get it working. The steps are wrt Visual VM 2.1.4. I installed VisualVM by downloading the dmg file from their website. Then … Continue reading →

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