Alex KlausDeveloper  |  Architect  |  Leader
September 2021
Multi-tenant applications with NoSQL
Multi-tenancy is never simple and can be addressed at different levels. Arguably, the most interesting solution would be where the app and the database both support multiple tenants. Here I bring this solution to the YABT project.
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June 2021
In Input We Don't Trust... and in JavaScript, don't trust output either ;)
A brutal post with cool examples of JavaScript dynamic typing and implicit casting.
It's dedicated to the 25th anniversary of JavaScript and has all chances to stay relevant for another ¼ of a century.
Check input for NULL and correct type, read the documentation and let JavaScript be with you (as it's not going away any time soon)...
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March 2021
Hosting SPA + .NET API solution. Caching and environment variables
When a team produces an enterprise solution with Single-Page Application (SPA) front-end and .NET Web API back-end, what are the options to host the two beasts?
Ultimately, we want to preserve the front-end bundle unchanged between environments, inject environment variables and have custom caching policies.
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January 2021
Entity Relationships in NoSQL (one-to-many, many-to-many)
Designing 'one-to-many' and 'many-to-many' relationships to reduce read operations on querying the data.
Let's take Users, Backlog Items and Comments entities from the YABT and consider their relationships from various angles, taking into account performance, operational costs, time/costs of development and maintenance.
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December 2020
Power of Dynamic fields for indexing dictionaries and collections in RavenDB
Marrying the flexibility of NoSQL entities for storing various sets of fields with strongly-typed .NET languages and powerful RavenDB indexing tools. Store custom fields, manage their C# structures and filter/search on them in the queries.
This post is a part of the YABT series dedicated to building an enterprise application leveraging the .NET Core + RavenDB bundle.
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November 2020
Hidden side of document IDs in RavenDB
Strategies for document identifiers in RavenDB (and NoSQL in general). Pros and cons of GUIDs, auto-incremented numbers, use of prefixes, ID masking and more.
This post is a part of the YABT series dedicated to building an enterprise application leveraging the .NET Core + RavenDB bundle.
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October 2020
NoSQL Data Model through the DDD prism
Practical modelling of a NoSQL database using the DDD (Domain Driven Design) practices to define the problem area (Bounded context) of the project, its domain entities and aggregates. Comparison to designing a relational model for a traditional SQL.
This post is a part of the YABT series dedicated to building an enterprise application leveraging the .NET Core + RavenDB bundle.
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October 2020
Yet Another Bug Tracker (YABT). Start of a series
NoSQL is not hard, it’s different. And to show that, RavenDB and I kick off a new series of articles dedicated to building an enterprise application leveraging the .NET Core + RavenDB bundle.
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September 2020
5 steps to better NuGet package
Five simple but often overlooked steps to provide a better experience to the devs using your NuGet package. Consider PDBs for the Symbol Server, Source Link integration, XML documentation, strong-named assemblies, CLS compliance and version managing.
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July 2020
Why the IT job market is not a Free Market?
Watching the LinkedIn feed full of dramatic pleas for job during last 3 months made me wondering whether being highly qualified make you crisis-proof? Whether a job crisis like a virus leaves the strongest (most skilled) ones in the workforce and slaughters the weak ones? Is the IT job market better than others? In other words, is the IT job market a Free Market?
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April 2020
6+ ways to marry C# with TypeScript
A popular bundle of .NET + SPA framework (e.g. Angular, React, Vue) has a notorious problem of enforcing contracts between the back-end and the front-end. Among all solutions, code generation tools are particular tempting. And here is analysis of all the major players to get the job done: NSwag, Swagger Codegen, OpenAPI Generator, AutoRest, WebApiClientGen and TypeWriter (plus 2 extra tools with partial functionality).
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March 2020
RavenDB vs Cosmos DB
When it comes to choosing a platform for a new application there is a lot to consider at different levels. For the CTO or Architect the focus is on providing the required scale, resiliency, maintainability, elasticity. And all of it within a certain price range. For the developers, the preference goes to elegant solutions, well integrated with the preferred technology stack and with smooth (pain-free) development experience.
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January 2020
Is Mediator/MediatR still cool?
Arguably, the Mediator pattern has become cool among the .NET devs when Jimmy Bogard released MediatR library 4 years ago. That library made words "Mediator" and "MediatR" interchangeable in the devs' lexicon. And as usual, trendy tools get often misused and applied without a second thought. Here I'm playing devil's advocate and look closely at its pros and cons. Is it still useful for modern .NET projects? May it become an anti-pattern one day as Service Locator did?
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November 2019
Two reasons to NoSQL
Following up on my "7 reasons not to NoSQL", here are my two reasons to go with NoSQL in enterprise projects - Cheaper to scale and Convenience of development.
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September 2019
Seven reasons not to NoSQL
Have you seen people affiliated with NoSQL databases aggressively advertising them as a solution for everything? And early adopters swearing allegiance to the NoSQL and claiming of passing the point of no return to SQL? Unsurprisingly, one may think of NoSQL as the silver bullet, which solves all the problems. Should we always use NoSQL?
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August 2019
Wonderland of TypeScript enums
Coming from high-level programming languages to TypeScript, a mere mortal dev may naively use an enum for a predefined list of numeric or textual values. Because really, how could it possibly be different in TypeScript?.. Unfortunately, it can and here is a quick run down the Rabbit Hole of TypeScript enums.
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July 2019
RavenDB. Two years of pain and joy
Having actively used RavenDB for a couple of years, I constantly get asked by other devs about feedback on the database. They usually expect to hear something simple and straightforward, like "love it" or maybe even "hate it", but my experience doesn't fall into any of these extremes. After 2 years I'm torn apart by polarised feelings about the database, and my expected-to-be-simple response turns into a long story about all the pros and cons, love and hatred. So here is my story.
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June 2019
Preventing Cross-site scripting (XSS) attacks in Angular and React
Cross-site scripting (XSS) is one of the most common application-layer web attacks. Are Angular or React apps safe? And if not, how to protect them? Some methods are easy to implement, others (like Content Security Policy) require more attention. Anyway, applying right settings is not a smooth ride, and some potholes and gotchas are described here.
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May 2019
6 most common mistakes of Angular devs revealed on code reviews
For professional developers, code/peer review is an essential step of the internal QA. Over the years, among a wide variety of problems revealed on code reviews, I found that some appear more often than others. Here is a list of the most common ones. So, the code is working, meets acceptance criteria, passed dev's testing and here we go...
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April 2019
Make Angular Reactive Forms strongly typed
Strongly typed Reactive Forms is the elephant in the room the Angular team doesn't want to talk about. In the absence of the official solution, developers can use some tricks to enforce type checking in the Reactive Forms. Here are two plausible solutions.
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March 2019
.NET Core project without Autofac. Is it viable?
Perhaps, Autofac is the most popular DI/IoC container for ASP.NET projects. But, since .NET Core has a pretty decent DI/IoC container, why would one still need Autofac? This is a story of gains and losses from switching a mid-sized project from Autofac to the standard .NET Core container.
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March 2019
Gatsby. Blogging platform engine for developers
Nowadays, an urge to write can be easily satisfied. Simply jump to Medium and you can fire away typing your first blog post. Not happy with your posts getting lost among millions of similar looking pages from thousands of bloggers? Then start building you own website for a small fee on Squarespace, WordPress and the likes. But for software developers…
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