Module observability

Expand description

What the SDK tells an application about the calls it makes: which operation is running, which HTTP requests it takes, and what each one answered.

Structs§

ChainHooks: Several Hooks as one. Gates, starts and retries run in order; ends run in reverse, so a hook that wraps the ones after it closes last, the way nested spans do.
NoopHooks: Hooks that do nothing. What a client runs with until it is given others, and what a chain of nothing comes to.
OperationInfo: The semantic identity of a call: the service and operation as the model names them, the kind of record they touch, and whether they change anything.
RequestInfo: One HTTP request the SDK is about to make, or has just made. attempt counts from 1 across the whole operation, the resend after a credential refresh included.
RequestResult: How one HTTP request turned out.

Hooks: The callbacks the SDK makes as it works. Every one does nothing by default, so an implementation says only what it cares about.

OperationState: Whatever Hooks::on_operation_start hands the matching Hooks::on_operation_end.