Struct TokenProviderChain

pub struct TokenProviderChain { /* private fields */ }

Access token provider that checks a series of inner providers.

Each provider will be evaluated in order:

• If a provider returns valid Token they will be returned immediately. No other token providers will be used.
• Otherwise, if a provider returns TokenError::TokenNotLoaded, the next provider will be checked.
• Finally, if a provider returns any other error condition, an error will be returned immediately.

Examples

use aws_config::meta::token::TokenProviderChain;
use aws_config::profile::ProfileFileTokenProvider;
use aws_credential_types::Token;

let provider = TokenProviderChain::first_try("Profile", ProfileFileTokenProvider::builder().build())
    .or_else("Static", Token::new("example", None));

Implementations

impl TokenProviderChain

pub fn first_try( name: impl Into<Cow<'static, str>>, provider: impl ProvideToken + 'static, ) -> Self

Create a TokenProviderChain that begins by evaluating this provider

pub fn or_else( self, name: impl Into<Cow<'static, str>>, provider: impl ProvideToken + 'static, ) -> Self

Add a fallback provider to the token provider chain

pub async fn or_default_provider(self) -> Self

Add a fallback to the default provider chain

pub async fn default_provider() -> Self

Creates a token provider chain that starts with the default provider

Trait Implementations

impl Debug for TokenProviderChain

fn fmt(&self, f: &mut Formatter<'_>) -> Result

Formats the value using the given formatter.

impl ProvideToken for TokenProviderChain

fn provide_token<'a>(&'a self) -> ProvideToken<'a>

where Self: 'a,

Returns a future that provides an access token.