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poc-custom-configuration-builders's Introduction

poc-custom-configuration-builders

Project created for testing custom Configuration Builders for .Net Framework 4.7.X.

The use case is to migrate settings and secrets in a huge legacy codebase fully coded with .Net Framework's ConfigurationManager as a dependency. Using custom configuration builders would allow me to keep settings and secrets away from external files without the need to refactor a lot of code.

It consists of three projects:

MyCustomConfigurationBuilders

This is a class library where I created two custom configuration builders:

  • StaticDataConfigurationBuilder as the name suggests, injects configuration based on its static data. It does not access any external files or services.

  • ConfigurationBuilderUsingSecretsManager is a custom configuration builder that instantiates AWS Secrets Manager Client. It doesn't have any other logic so far.

SimpleCustomConfigurationBuilder

This is a sample web project with its AppSettings configured to inject data from the StaticDataConfigurationBuilder.

Upon running this application, you should see a json output with data coming from the custom configuration builder.

AttemptToUseConfigurationBuilderWithAwsSdk

This other web project will try to inject settings from the ConfigurationBuilderUsingSecretsManager.

When trying to run it, we get a StackOverflowException. I've added log to the debug output to let me know when the class was being instantiated and upon getting the Exception we can see the logged output below.

Something in AWS Secrets Manager Client seems to trigger reinitialization of the class.

Output of the Debug log below:

ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
ConfigurationBuilderUsingSecretsManager has been instantiated
An unhandled exception of type 'System.StackOverflowException' occurred in mscorlib.dll

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