Trait ConfigSource

Source

pub trait ConfigSource:
    Send
    + Sync
    + 'static {
    // Required methods
    fn name(&self) -> &str;
    fn load(&self) -> BoxFuture<Result<HashMap<String, String>, String>>;
}

Expand description

Where configuration comes from: environment, a file, a database, a vault, a license server.

Keys are lower case and dotted, such as db.url.

struct VaultSource { client: MyVaultClient }
impl ConfigSource for VaultSource {
    fn name(&self) -> &str { "vault" }
    fn load(&self) -> BoxFuture<std::result::Result<HashMap<String, String>, String>> {
        let client = self.client.clone();
        Box::pin(async move { client.read("secret/app").await.map_err(|e| e.to_string()) })
    }
}