Run background processes with the IHostedService and how to inject your services with dependency injection
Many services need background processing. The ASP.NET Core 2.X IHostedService interface gives you an easy implementation skeleton to implement background processes. The Hosted Services are registered in the dependency injection at startup and started automatically. You do not have to do the pluming to get them started at startup. On shutdown you can implement a graceful shutdown. When running background processes there a few pitfalls to avoid. In this blog I’ll introduce the IHostedService and how to avoid common memory leaks when implementing the hosted service.
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Find the root cause of what really happened to you disposable object.
Working with ASP.NET core I have seen this error multiple times and can be hard to debug. The error can have multiple root causes. It can be a real pain to find the cause and it is sometimes fixed by only taking care of the symptoms. By finding the root cause, you can take the appropriate action in your code.
Continue reading “Cannot access a disposed object in ASP.NET Core when injecting DbContext”
Lately we had a discussion on when to use ConfigureAwait(true) or ConfigureAwait(false) in ASP.NET Core 2. In the end most of the team, including me, had a faulty assumption on how to do this in ASP.NET Core. In this case ASP.NET Core is different from ASP.NET. Good to know if you have to decide on what to use in ASP.NET core.
Continue reading “ASP.NET Core correct usage of ConfigureAwait with async/await”
Use Multi-Role Application Map to monitor cross process dependencies
When using Application Insights to monitor your Microservices environment, it would be nice to track calls over process boundaries. Application Insights has a preview for Multi-Role Application Maps. This enables you to visualize the dependencies over multiple processes and name the different processes. In this blog posts I will explain how to use Multi Role Application Maps, give you different process names and add dependency tracking into your application. Continue reading “Cross process Application Insights with Multi-Role Application Map”
Learn how to gracefully handle Application Shutdown in ASP.NET Core by looking at the handling of flushing the application insights messages when asp.net core exits
When running an ASP.NET Core web application, there are cases when you need to do some logic when the application stops. An example: you are logging and have to flush the last message to the log (Application Insights). In that case you need can add an event in the
Configure method. In this post I show a short example of how doing this.
Continue reading “Application Shutdown in ASP.NET Core with IApplicationLifetime”