How To Send Ethereum Transactions With Java
After I’ve expressed my concerns about the blockchain technology, let’s get a bit more practical with the blockchain. In particular, with Ethereum. I needed to send a transaction with Java,Continue reading
Basic API Rate-Limiting
It is likely that you are developing some form of (web/RESTful) API, and in case it is publicly-facing (or even when it’s internal), you normally want to rate-limit it somehow.Continue reading
Simple Spring Boot Admin Setup
Spring Boot Admin is a cool dashboard for monitoring your spring boot applications. However, setting it up is not that trivial. The documentation outlines two options: Including a client libraryContinue reading
Electronic Signature Using The WebCrypto API
Sometimes we need to let users sign something electronically. Often people understand that as placing your handwritten signature on the screen somehow. Depending on the jurisdiction, that may be fine,Continue reading
Event Logs
Most system have some sort of event logs – i.e. what has happened in the system and who did it. And sometimes it has a dual existence – once asContinue reading
Spring Boot, @EnableWebMvc And Common Use-Cases
It turns out that Spring Boot doesn’t mix well with the standard Spring MVC @EnableWebMvc. What happens when you add the annotation is that spring boot autoconfiguration is disabled. TheContinue reading
Distributed Cache – Overview
What’s a distributed cache? A solution that is “deployed” in an application (typically a web application) and that makes sure data is loaded from memory, rather than from disk (whichContinue reading
Distributing Election Volunteers In Polling Stations
There’s an upcoming election in my country, and I’m a member of the governing body of one of the new parties. As we have a lot of focus on technologyContinue reading
“Infinity” is a Bad Default Timeout
Many libraries wrap some external communication. Be it a REST-like API, a message queue, a database, a mail server or something else. And therefore you have to have some timeoutContinue reading
Protecting Sensitive Data
If you are building a service that stores sensitive data, your number one concern should be how to protect it. What IS sensitive data? There are some obvious examples, likeContinue reading