Category : Web Applications (7)

Test Driven Development

30.06.2022

TDD Cycle

TDD tells that a test case should be written first, then the code should be written.

TDD is a cyclical process and includes three stages: RED, GREEN, REAFTOR. In the RED stage, a test case is written and executed. The test case fails. In the GREEN stage, first code is written for the test case to pass. The code doesn't need to be clean. The main goal is to write the simplest code for the test case to pass. The test case is run again. If the test is successful, the REFACTOR stage is started. At this stage, if the code can be refactored, it is done. The test case is run again. If the test case fails, the code is refactored. This cycle is continued until the code becomes desired.

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What is Modular Monolith?

29.03.2022

Traditional Monolith

Firstly, let's talk about Traditional Monolith approach. This approach focuses on layers. It includes three layers, UI, Business and Data. All features in a project are vertically separated into these layers. Among those three layers, the business layer is the one that contains business logics of all features. Each feature knows business logic of other features, which is a fact we call tightly coupled.

Traditional Monolith
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ASP.NET Core Feature Management

26.03.2022

Feature Management provides feature management in .NET Core applications. It allows the management and querying of the active / passive status of the features of the application. For example, you can ensure that a feature you have just developed is active in a certain date range. To give another example, you can ensure that a feature you have developed is active with a certain percentage. Like A/B testing.

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Event Sourcing with ASP.NET Core - 02 Messaging

26.03.2022

1. Introduction

Since this article is second part of the article below, I recommend you to read the following article before starting. We will continue with the sample project in the article below.

Event Sourcing with ASP.NET Core - 01 Store
1. Introduction I recommend you to read the article below before applying this example tutorial. In the article I have mentioned above, I had formed…

In the previous article, we made the example of Kanban Board. By creating a RESTful API, we wrote the create, assign, move and complete endpoints. We recorded the requests coming to these endpoints as an event in the Event Store. So we focused on the store part of the Event Store. In this article, we will focus on with the messaging part.

We will include the following endpoint in our RESTful API endpoints.

[GET] api/tasks/{id}

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Event Sourcing with ASP.NET Core - 01 Store

26.03.2022

1. Introduction

I recommend you to read the article below before applying this example tutorial.

What is Event Sourcing?
Previously, our services would be as follows. This service consisted of hundreds of lines of code. To get rid of this confusion, we split our…

In the article I have mentioned above, I had formed a sentence as follows.

In this article, we will deal with the store section of the Event Store. In other words, we will deal with the database feature where we can save events. In the next article, we will deal with the messaging part.

As an sample application, I chose the classic Kanban Board sample.

Our RESTful API endpoints will be as follows.

[POST] api/tasks/{id}/create
[PATCH] api/tasks/{id}/assign
[PATCH] api/tasks/{id}/move
[PATCH] api/tasks/{id}/complete

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Couchbase GeoSearch with ASP.NET Core

26.03.2022

The subject of this article will be about how to do "GeoSearch" by using Couchbase.

1. Installing the Couchbase

For this purpose, we create Couchbase cluster with the docker by running the command below.

    docker run -d --name couchbase -p 8091-8094:8091-8094 -p 11210:11210 couchbase

When Couchbase is up, it will start broadcasting at the address below.

http://localhost:8091/

We create the cluster by clicking the "Setup New Cluster" button. We define the password as "123456".

Create New Cluster
Create New Cluster

You can make adjustment according to your current memory status. You can turn off "Analytics". We complete the cluster installation by clicking the "Save & Finish" button.

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What is Event Sourcing?

26.03.2022

Previously, our services would be as follows.

Application Services 01
Application Services 01

This service consisted of hundreds of lines of code. To get rid of this confusion, we split our services into two parts as "Command" and "Query" with CQRS. We performed our CRUD operations with "Command" services and our query operations with "Query" services. Two separate services appeared as follows.

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