When I first started to look at Kafka as a event publishing system, my first question was ‘How to create pub/sub and queue type of events?’. Unfortunately, there was no quick answers for that, because the way Kafka works. My previous article was about Kafka basics, which you can, of course, read and get more information about this cool commit...
Preface Today, we live in a world, which defines no ip addresses and is dynamically changing minute by minute. As amount of services increase every day, we receive new problems. Story Just imagine, that you have a monolithic application, which you want to rewrite into microservices architecture. You start with a single service, which, let’s say, maintains profile functionality. You...
Few days ago I faced an issue with using Java InputStream in parallel. Imagine following situation: you have InputStream, which you need to use in parallel. First thing - you can’t use it in parallel, because InputStream keeps some pointer, which store information about where stream position is. More realistic scenario is to make first call asynchronous, and leave second...
Problem As a part of my investigation of what docker is, I want to do a simple and useful thing - deploy my application in a completely convenient manner. Let’s say, I’m using Digital Ocean as a cloud provider. Because my application is too little to think about complex deployment infrastructure, I’d like to be able to deploy everything from...
Integration tests…they are perfect for testing your data flows. You send some request to your application and can control how data is being processed throughout your application. You see how request is received by your controller, then it’s sent to service, dao or other layers, that you have in your application. Sometimes you don’t want some layer to do real...
