Endpoint Resolution Upgrade Guidance

[rcoh]

Endpoint resolution has been overhauled to support virtual addressing, dynamic endpoint resolver generation, and parameterized endpoints.

Changes

Remove deprecated ResolveAwsEndpoint interfaces.

In general, the path forward is to either:

1. Replace usages with either endpoint_url either on SdkConfig, ConfigLoader or <service>::config::Builder::endpoint_url.
2. Replace usages with a service-specific resolver override.

The following APIs have been removed:

1. SdkConfig::endpoint_resolver(): This getter referred a field that has been removed.
2. sdk_config::Builder::set_endpoint_resolver(resolver): This setter has been removed.
3. ConfigLoader::endpoint_resolver(resolver): This previously deprecated setter has been removed.
4. Three types have been removed from the aws-endpoint crate: AwsEndpoint, CredentialScope, and ResolveAwsEndpoint.
5. The re-export of Endpoint has been removed from generated services. Use endpoint_url which accepts a string directly instead. Alternatively, &'static str provides an automatic implementation of ResolveEndpoint.

Endpoint in aws-smithy-http has been deprecated

Endpoint will be removed at a later date. Instead of using Endpoint, you can:

• pass a string to SdkConfig::endpoint_url or <service>::Config::endpoint_url
• pass a static string directly
• Use aws_smithy_types::Endpoint