Chekkan's Blog

Using Domain Types with NHibernate

Primitive obsession is a code smell. The proposal is to replace strings, and other primitive data types with domain types. For example, user's id in system can be represented by an integer or Guid (UUID), or string (username). However, there are benefits that come along with creating a type called

dotnet

MiniProfiler for dotnet with NHibernate MSSQL Driver

NHibernate integration with MiniProfiler for dotnet doesn't have first class support. But, profiling sql queries from NHibernate ORM is easy.

software engineering

Improving one's technical skills

I had a colleague recently asked me "how do I improve and work on my technical skills?". I am in no disillusion that I was asked because of my incredible technical knowledge. I think they were told to ask others in the team and I was included as part. But,

testing

Thoughts on TDD

I am mainly a C# developer and have some experience with JavaScript. Recently, I’ve been playing around with Ruby on Rails. I was impressed by the way tests are set up for you automatically with a new project. From system, integration, to unit tests. It prompted me to think

rails

Ruby on Rails GitHub Action Workflow

Setting up a pipeline for continuous integration to the main git branch for a ruby on rails version 6 project using GitHub workflow actions.

kubernetes

Update blog to ghost version 4 running in Kubernetes

With ghost version 4.2.0 out recently, it was time for me to try and update my blog which is currently running on kubernetes

testing

Faking .NET Framework ConfigurationSection for Unit Tests

Many are now familiar with using typed configuration that's available in .net core and .net 5 with the help from Options pattern. However, if you are working on a projects targeting .NET Framework, you will know ConfigurationSection from System.Configuration assembly. ConfigurationSection allows you to group related configurations together in

kubernetes

Deploying GitHub packages docker image to Kubernetes

GitHub had announced a major feature on their platform which is GitHub packages. As well as hosting private npm or NuGet registries, GitHub packages also includes private docker registries. If you use GitHub for hosting your private project, it might make sense to use the private docker registry from GitHub.

haskell

GitHub Workflow for Haskell Yesod Docker image with Stack

In a previous post, I went over creating a Dockerfile for Haskell Yesod application. In this post, I will reuse part of the Dockerfile we ended up with and modify it so that we can build the docker image with GitHub Workflows. GitHub Workflow And ActionsIn order to create a

haskell

Haskell Yesod Web Application in Docker

Yesod is one of the web frameworks available for Haskell. It seems to be the easiest one out of the multiple choices available to get started with. PrerequisitesDockerHaskell Stack version 2.3.1You can find all yesod stack templates available from the github repository. At the time of writing, the

mongodb

Streaming MongoDB collection to S3 with dotnet core Pipelines

In this article, we will be looking into a memory-efficient way of streaming data from MongoDB collection into AWS S3 File Storage using the System.IO.Pipelines introduced in .Net Standard 2.1. I will be using MongoDB version 3.6 and going to be assuming that the appropriate indexes

entity-framework

Entity Framework Core Elegant Database Migrations on ECS

This article is insipired by the blog post Elegant Database Migrations on ECS from Adam Stepinski. The original article guides you through setting up an application thats setup with Django Framework. I am going to presribe a method with the following technologies: ASPNET Core 3.1 Web APIEntity Framework Core

aws

IAM policy permissions for a public load balanced ecs fargate service on AWS CDK

Using AWS CDK with an admin user is all fine and straight forward. But, when it comes to creating a deployment pipeline with an IAM user specifically created with the actual permission needed, it can take a long time of trialing and failing to get to the final list of

javascript

Defensive coding with guard assertions in Javascript

Let’s take a look at a function that took a score between 1 and 100 and returned a rating out of 5. function rating(score) { return Math.ceil(score / 20); }At first glance, this function looks simple, it has made a lot of assumption about its input argument. The

haskell

Install haskell platform on mac with homebrew

The recommended way to install the components of the mac platform is using ghcup to install ghc and cabal-install. haskell.orgghcup is an installer for the general purpose language Haskell Open a terminal and execute the following command to install ghcup curl https://get-ghcup.haskell.org -sSf | shPress ENTER -&

react

Azure DevOps Create React App Pipeline

The following azure pipeline yaml file works for create-react-app version 3.0.1. Install the package jest-junit for unit test code coverage results to be published. In the root of the repository, create a file called azure-pipelines.yml with the following content. trigger: - master pool: vmImage: "Ubuntu-16.04" steps:

wcf

Migrating from SOAP to REST using Apigee

Apigee is another option for converting your SOAP services to a RESTful API. I covered Azure API management in another blog post. I will use the same calculator SOAP service to create a SOAP to REST API proxy in Apigee. From the Apigee edge homepage, select the API Proxies tile.

wcf

Migrating from SOAP to REST using Azure API Management

If you’ve got legacy applications written in WSDL or SOAP, and you are planning to expose it as a rest endpoint, Azure API Management seems to be good option at the moment. Another option is apigee; Although, it seems to miss some of the features thats available through Azure

dotnet

dotnet aspnet core https certifcate not found error

I came across this particular issue when my Mac’s account was changed from a domain associated account to a local user account. Among many other things, my dotnet aspnet core web api was failing to run at the start with the error that said “Unable to configure HTTPS endpoint.

elasticsearch

Setting Up Elasticsearch Cluster on Kubernetes - Part 3 - Configuration File

Part 1 - Setting up Single Node ElasticsearchPart 2 - Setting up Kibana ServicePart 3 - Kubernetes Configuration FilesNow that we have a single node elasticsearch service and kibana to monitor the cluster, lets try to capture the work so far into kubernetes configuration file. Kubernetes Configuration FileOur current elasticsearch

elasticsearch

Setting up Elasticsearch Cluster on Kubernetes - Part 2 - Kibana

This is part 2 out of 3 in this series of blog posts. Part 1 - Setting up Single Node ElasticsearchPart 2 - Setting up Kibana ServicePart 3 - Kubernetes Configuration FilesSetup KibanaLet’s try to setup kibana pointing to our elasticsearch single node cluster. kubectl run kibana --image=docker.

elasticsearch

Setting up Elasticsearch cluster on Kubernetes - Part 1 - Single Node Cluster

This is the begining of a multiple part series of blog posts going through setting up Elasticsearch cluster in kubernetes. Part 1 - Setting up Single Node ElasticsearchPart 2 - Setting up Kibana ServicePart 3 - Kubernetes Configuration FilesThe main aim of this series of blog posts will be make

aws

Access response headers in HTTP Fetch API with Serverless Framework and AWS Lambda

In order to access response headers such as Location in HTTP Fetch api whilst using Serverless Framework and AWS Lambda Functions with CORS enabled, you need to do the following. Make sure cors is set to true on serverless.yml postUsers: handler: handler.postUsers events: - http: path: users method:

elasticsearch

Ingesting data from Oracle DB into Elasticsearch with Logstash

Alternative to Logstash was the Elasticsearch JDBC tool. Which at the time of writing was using port 9300 for transfering data. There were talks of not exposing this port externally in future releases of elaticsearch and hence we went with logstash. SetupThe way we have setup logstash and elasticsearch cluster

vsts

Release Management Service and VSTS Team Build

I’ve started working on a new project at my company and it is a massive project compared to anything I have done previously. We are not short on technologies in this project starting with an angular web site all the way to using elastic search. One of the challenges