Articles

Developing Event-Driven Microservices

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This is the second in a series of blogs on data-driven microservices design mechanisms and transaction patterns with the Oracle converged database. The first blog illustrated how to connect to an Oracle database in Java, JavaScript, Python, .NET, and Go as succinctly as possible. The goal of this second blog is to use that connection to receive and send messages with Oracle AQ (Advanced Queueing) queues and topics and conduct an update and read from the database using all of these same languages.

Advanced Queuing (AQ) is a messaging system that is part of every Oracle database edition and was first released in 2002. AQ sharded queues introduced partitioning in release 12c and is now called Transaction Event Queues (TEQ).

Source de l’article sur DZONE

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Distributed Tracing in ASP.NET Core With Jaeger and Tye, Part 2: Project Tye

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In This Series:

  1. Distributed Tracing With Jaeger
  2. Simplifying the Setup With Tye (this article)

Tye is an experimental dotnet tool from Microsoft that aims to make developing, testing, and deploying microservices easier. Tye’s opinionated nature greatly simplifies the lifecycle of development and deployment of .NET Core microservices.

To understand the benefits of Tye, let’s enumerate the steps involved in the development and deployment of the DCalculator application to Kubernetes:

Source de l’article sur DZONE

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Salvaging .Net’s HttpClient

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If you read my previous article, it’s easy to become frustrated. HttpClient is at the core of everything we as software developers normally do when we integrate our stuff with other people’s stuff. Somebody sounding the alarm, telling you that it’s fundamentally broken, might result in everything ranging from a general concern about ones own code, to flat out panic attacks. Hence, I figured I’d be an asshole unless I also showed you an alternative.

Paradoxically, fixing HttpClient is very easy, it’s just to cut away everything in it that’s dangerous, and encapsulate everything that’s beautiful about it into a much safer API, making it impossible for developers to retrieve the instance to the HttpClient you’re using internally. Basically, treat most of HttpClient’s API as if it was cancer, and salvage the rest. Here’s a much safer version in case you care. For the record, to understand this class, you have to read my previous article here at DZone.

Source de l’article sur DZONE

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8 Reasons Why PHP and .NET Rule the World of Web Development

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If any company wants to succeed in the market, it needs to strengthen its digital presence. Though social media provides a place to gain some attention, it is impossible to create a brand without an official web page. This is why businesses hire firms offering web development services to get their website designed, which would enable them to get as much traction as possible. 

Web development covers actions such as web design, programming, content creation, network security tasks, and server-side & client-side scripting. Among the technologies available for web development, most web development companies make their programming choice between PHP and.NET.

Source de l’article sur DZONE

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Create CRUD endpoints using Hyperlambda

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Hyper implies web, and lambda implies function – Hence, Hyperlambda translates into "web functions", and this is a fairly accurate description. However, hyper also implies "super fast", and by super fast here, I mean super fast! 1 minute and 45 seconds was what I needed to create CRUD endpoints wrapping my database table, manually creating my endpoints in the following video, while explaining how I did it simultaneously.

According to modern studies in the subject, the number of lines of code your project consists of, is directly proportional to the amount of energy and resources you’ll need to spend maintaining it. Hence, the fewer lines of code, the fewer resources are required to maintain it. In the video above, I copy and paste 50 lines of code, and I end up with 4 HTTP REST CRUD endpoints. Comparing this to C# is arguably unfair. Simply the boiler plate code for my Controller, would probably end up exceeding this number. You can find my code for all endpoints below.

Source de l’article sur DZONE

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Event Sourcing in .NET Core: A Gentle Introduction

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Event sourcing, aka "the great myth". I’ve been thinking about writing a series of articles about this for a while, and now it’s time to put my hands back on the keyboard. 

I thought that with this long period of confinement at least I could have had more time to write some nice articles, but it turns out the reality has been slightly different so far.

Source de l’article sur DZONE

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How to Implement Producer/Consumer With System.Threading.Channels

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What’s this “Producer/Consumer” thing? It’s around us, everywhere. Every time you see some kind of workflow with multiple serial steps, that’s an example. A production line in a car factory, a fast-food kitchen, even the postal service.

So why do we care about it? Well, that’s easy: in almost every piece of software we write, there’s a pipeline to fulfill. And as every pipeline, once a step is completed the output is redirected to the next one in line, freeing up space for another execution.

Source de l’article sur DZONE

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