a developer's notebook
C# 7.0 adds a number of new features and brings the focus on data consumption, code simplification and performance. Perhaps the most interesting feature is tuples, a finite ordered list of values, of possibly different types, which is used to bundle related values together without having to create a specific type to hold them. Tuples are very good for performance reasons, as you don’t…
Azure Service Fabric is a distributed systems platform that makes it easy to package, deploy and manage scalable and reliable microservices. Service Fabric also addresses the significant challenges in developing and managing cloud applications. In this post, we will explore how to host an ASP.NET Core web application, alongside a stateless and a stateful service on an Azure Service Fabric cluster,…
Build 2017 is over. A three-day conference, where a lot of great stuff was announced. Apart from the keynotes of every day, there are many technical sessions to watch and learn from. The whole list of sessions is available at Channel 9. Here you may find my picks from the categories I am interested in. Azure Related Visual Studio &…
Azure Service Fabric is a distributed systems platform that makes it easy to package, deploy, and manage scalable and reliable microservices. It enables you to build and manage scalable and reliable applications, composed of microservices that run at a very high density on a shared pool of machines, which is referred to as a cluster. In addition, it provides a…
When starting playing with Service Fabric in Visual Studio, you may come to the following error when trying to debug your application:
1 2 3 4 | System.Fabric.FabricConnectionDeniedException: 'Not authorized to connect' Inner Exception COMException: Exception from HRESULT: 0x80071C43 |
The error although may look tricky, is very easy to fix and happens when you have created a Service Fabric application and accidentally Set as Startup Project the Fabric Service, as showing in the following picture: So, Set as Startup Project the Service Fabric…
A great tool, when starting learning Elixir, is Elixir’s Interactive Shell (IEx), which allows you to type any Elixir expression and get its result. To start using IEx, open a terminal of your choice and type iex (or iex.bat if you are on Windows), which stands for Interactive Elixir. By default, colors are not enabled and iex looks like what you see below: It turns out…
One thing you should always keep in mind is backing up your precious work. Bad things may happen sooner or later, so better be prepared for the “unexpected”, than sorry. In a recent talk with a friend, I found out that he wasn’t aware of how easy it is to backup a web app hosted in Azure App Service; so why not write a…
Visual Studio 2017 is now available to download, and one interesting feature thereof is connected services, which enable connections between your app and any service on-premises or in the cloud. In this post we are going to demonstrate how easy it is to connect your asp.net core web app to Application Insights. “Connected Services” is the new “Add Connected Service” or “Add Service Reference” feature…
To keep things tidy, in case you have multiple subscriptions associated with your Azure account, it’s a good practice to name them in a way that makes sense to you. For example, if you have an msdn subscription, the default name in Azure Portal is “Visual Studio Enterprise“, or if you have applied for a Visual Studio Dev Essentials program, the default name is “Developer Program…
Azure App service provides an easy way to track your web app’s availability / health and to get details on when and why your app wasn’t available. This kind of info is available through the web app’s blade, when selecting Diagnose and solve problems A new page appears with details on: app’s availability; requests per 5 minutes; and when and why your app…
