Struct aws_config::ConfigLoader

pub struct ConfigLoader { /* private fields */ }

Load a cross-service SdkConfig from the environment

This builder supports overriding individual components of the generated config. Overriding a component will skip the standard resolution chain from for that component. For example, if you override the region provider, even if that provider returns None, the default region provider chain will not be used.

Implementations

impl ConfigLoader

pub fn region(self, region: impl ProvideRegion + 'static) -> Self

Override the region used to build SdkConfig.

Examples

use aws_types::region::Region;
let config = aws_config::from_env()
    .region(Region::new("us-east-1"))
    .load().await;

pub fn retry_config(self, retry_config: RetryConfig) -> Self

Override the retry_config used to build SdkConfig.

Examples

    let config = aws_config::from_env()
        .retry_config(RetryConfig::standard().with_max_attempts(2))
        .load().await;

pub fn timeout_config(self, timeout_config: TimeoutConfig) -> Self

Override the timeout config used to build SdkConfig. Note: This only sets timeouts for calls to AWS services. Timeouts for the credentials provider chain are configured separately.

Examples

 use aws_smithy_types::timeout::TimeoutConfig;

 let config = aws_config::from_env()
    .timeout_config(
        TimeoutConfig::builder()
            .operation_timeout(Duration::from_secs(5))
            .build()
    )
    .load()
    .await;

pub fn sleep_impl(self, sleep: impl AsyncSleep + 'static) -> Self

Override the sleep implementation for this ConfigLoader. The sleep implementation is used to create timeout futures.

pub fn http_connector(self, http_connector: HttpConnector) -> Self

Override the HttpConnector used to build SdkConfig.

pub fn credentials_provider(
    self,
    credentials_provider: impl ProvideCredentials + 'static
) -> Self

Override the credentials provider used to build SdkConfig.

Examples

Override the credentials provider but load the default value for region:

let config = aws_config::from_env()
    .credentials_provider(create_my_credential_provider())
    .load()
    .await;

pub fn endpoint_resolver(
    self,
    endpoint_resolver: impl ResolveAwsEndpoint + 'static
) -> Self

Override the endpoint resolver used for all AWS Services

This method will override the endpoint resolver used for all AWS services. This mainly exists to set a static endpoint for tools like LocalStack. For live traffic, AWS services require the service-specific endpoint resolver they load by default.

Examples

Use a static endpoint for all services

use aws_smithy_http::endpoint::Endpoint;
let sdk_config = aws_config::from_env()
  .endpoint_resolver(Endpoint::immutable("http://localhost:1234".parse().expect("valid URI")))
  .load().await;

pub fn configure(self, provider_config: ProviderConfig) -> Self

Set configuration for all sub-loaders (credentials, region etc.)

Update the ProviderConfig used for all nested loaders. This can be used to override the HTTPs connector used or to stub in an in memory Env or Fs for testing.

Examples

use aws_config::provider_config::ProviderConfig;
let custom_https_connector = hyper_rustls::HttpsConnectorBuilder::new().
    with_webpki_roots()
    .https_only()
    .enable_http1()
    .build();
let provider_config = ProviderConfig::default().with_tcp_connector(custom_https_connector);
let shared_config = aws_config::from_env().configure(provider_config).load().await;

pub async fn load(self) -> SdkConfig

Load the default configuration chain

If fields have been overridden during builder construction, the override values will be used.

Otherwise, the default values for each field will be provided.

NOTE: When an override is provided, the default implementation is not used as a fallback. This means that if you provide a region provider that does not return a region, no region will be set in the resulting SdkConfig

Trait Implementations

impl Debug for ConfigLoader

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

Formats the value using the given formatter.

impl Default for ConfigLoader

fn default() -> ConfigLoader

Returns the “default value” for a type.