aws_smithy_runtime/client/identity/cache.rs
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/*
* Copyright Amazon.com, Inc. or its affiliates. All Rights Reserved.
* SPDX-License-Identifier: Apache-2.0
*/
use aws_smithy_runtime_api::client::identity::{
IdentityFuture, ResolveCachedIdentity, ResolveIdentity, SharedIdentityCache,
SharedIdentityResolver,
};
use aws_smithy_runtime_api::shared::IntoShared;
use aws_smithy_types::config_bag::ConfigBag;
mod lazy;
use aws_smithy_runtime_api::client::runtime_components::RuntimeComponents;
pub use lazy::LazyCacheBuilder;
/// Identity cache configuration.
///
/// # Examples
///
/// Disabling identity caching:
/// ```no_run
/// use aws_smithy_runtime::client::identity::IdentityCache;
///
/// # /*
/// let config = some_service::Config::builder()
/// .identity_cache(
/// # */
/// # drop(
/// IdentityCache::no_cache()
/// # );
/// # /*
/// )
/// // ...
/// .build();
/// let client = some_service::Client::new(config);
/// # */
/// ```
///
/// Customizing lazy caching:
/// ```no_run
/// use aws_smithy_runtime::client::identity::IdentityCache;
/// use std::time::Duration;
///
/// # /*
/// let config = some_service::Config::builder()
/// .identity_cache(
/// # */
/// # drop(
/// IdentityCache::lazy()
/// // change the load timeout to 10 seconds
/// .load_timeout(Duration::from_secs(10))
/// .build()
/// # );
/// # /*
/// )
/// // ...
/// .build();
/// let client = some_service::Client::new(config);
/// # */
/// ```
#[non_exhaustive]
pub struct IdentityCache;
impl IdentityCache {
/// Create an identity cache that does not cache any resolved identities.
pub fn no_cache() -> SharedIdentityCache {
NoCache.into_shared()
}
/// Configure a lazy identity cache.
///
/// Identities are lazy loaded and then cached when a request is made.
pub fn lazy() -> LazyCacheBuilder {
LazyCacheBuilder::new()
}
}
#[derive(Clone, Debug)]
struct NoCache;
impl ResolveCachedIdentity for NoCache {
fn resolve_cached_identity<'a>(
&'a self,
resolver: SharedIdentityResolver,
runtime_components: &'a RuntimeComponents,
config_bag: &'a ConfigBag,
) -> IdentityFuture<'a> {
IdentityFuture::new(async move {
resolver
.resolve_identity(runtime_components, config_bag)
.await
})
}
}