Tag Archives: Kotlin

In a previous blog post I went over the basics of Json Patch and Json Merge Patch and how a code that performs these operations looks like. In this post I will go over the details of how to expose a Spring based endpoint to accept a Json Patch or Json Merge Patch body and patch and save an entity. ...

 Json Patch and Json Merge Patch both do one job well – a way to represent a change to a source json structure.   Json Patch does it as a series of operations which transforms a source document and Json Merge Patch represents the change as a lite version of the source document. It is easier to show these as an ...

I have worked with Spring Framework for ages and it still manages to surprise me with how cutting edge it continues to be but at the same time enabling a developer to put together a fairly sane app. The most recent surprise was with how it enables programming a web application with Kotlin coroutines. Coroutines is a fairly complicated concept ...

AWS DynamoDB is described as a NoSQL key-value and a document database. In my work I mostly use the key-value behavior of the database but rarely use the document database features, however  the document database part is growing on me and this post highlights some ways of using the document database feature of DynamoDB along with introducing a small utility ...

I needed to display the contents of a Android content provider in a recyclerview with pagination. I also wanted to try out version 3 of the Android Paging Library (which is currently in 3.0.0.alpha2 release), but most of the sources of documentation and tutorials are targeted at accessing either a network (e.g. Retrofit) or a database. So I wrote a ...

It is useful to have a version attribute on any entity saved to anAWS DynamoDB database which is simply a numeric indication of the number of times the entity has been modified. When the entity is first created it can be set to 1 and then incremented on every update.  The benefit is immediate – an indicator of the number ...

In this intellij plugin development tutorial, we’ll be taking a look at how to build a simple plugin for IntelliJ. And since Android Studio is also built on IntelliJ, it can be used in Android Studio as well. Wait, why do I need a plugin? Automate the boring stuff: That’s the sole reason why I use intellij plugins. I’ve used ...

This is a follow up to my blog post about processing SQS messages efficiently using Spring Boot and Project Reactor There are a few gaps in the approach that I have listed in the first part. 1. Handling failures in SQS Client calls2. The approach would process only 1 message from SQS at a time, how can it be parallelized3. ...

I recently worked on a project where I had to efficiently process a large number of messages streaming in through an AWS SQS Queue. In this post (and potentially one more), I will go over the approach that I took to process the messages using the excellent Project Reactor The following is the kind of set-up that I am aiming ...