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Vostok.Configuration in a nutshell

Vostok.Configuration is a set of libraries offering configuration tools to .NET applications. It handles fetching configuration data from files or APIs, parsing and converting it to user-defined model classes.

Guiding design principles

• Configuration data sources should be composable regardless of storage formats.

  • It should be easy to combine settings from JSON files, environment variables and custom APIs. This is achieved with configuration source concept and universal settings nodes abstraction.

• "Hot" configuration updates should be easy to leverage.

  • Hot configuration implies handling changes in settings without application restart. This is enabled by explicitly reactive source design and settings provider methods.

• Rich object models should be supported for user convenience.

  • Binding process supports a wide range of primitives, collections, classes, interfaces and employs a number of conventions for arbitrary types (anything with a TryParse method works).

• It should be possible to extend the library with arbitrary data sources and object models.

  • Two major extensions points are custom configuration sources and binders.

Features

• On-demand and subscription-based methods to obtain settings;

• Support for required and secret settings;

• Support for custom settings validation;

• Wide selection of built-in sources;

• Composable binders;

• Sources can be combined, navigated and transformed;

• Integration with Microsoft configuration system;

Guarantees

See obtain / observe settings scenarios, caching and error handling sections for details.

Good starting points

Quickstart

Concepts and basics

Basic scenarios

Modules