Trait config::ConfigurationProvider

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pub trait ConfigurationProvider {
    fn get(&self, key: &str) -> Option<&str>;
    fn child_keys(
        &self,
        earlier_keys: &mut Vec<String>,
        parent_path: Option<&str>
    );

    fn name(&self) -> &str { ... }
    fn reload_token(&self) -> Option<Box<dyn ChangeToken>> { ... }
    fn load(&mut self) { ... }
}

Expand description

Defines the behavior of an object that provides configuration key/values for an application.

Required Methods

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fn get(&self, key: &str) -> Option<&str>

Attempts to get a configuration value with the specified key.

Arguments

key - The key of the value to retrieve

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fn child_keys(&self, earlier_keys: &mut Vec<String>, parent_path: Option<&str>)

Gets the immediate descendent configuration keys for a given parent path based on this provider and the set of keys returned by all of the preceding providers.