Module apollo_router::layers::async_checkpoint

Asynchronous Checkpoint

Provides a general mechanism for controlling the flow of a request. Useful in any situation where the caller wishes to provide control flow for a request.

If the evaluated closure succeeds then the request is passed onto the next service in the chain of responsibilities. If it fails, then the control flow is broken and a response is passed back to the invoking service.

See [Layer] and Service for more details.

Structs

• AsyncCheckpointLayer
  [Layer] for Asynchronous Checkpoints. See ServiceBuilderExt::checkpoint_async().
• AsyncCheckpointService
  Service for Asynchronous Checkpoints. See ServiceBuilderExt::checkpoint_async().
• OneShotAsyncCheckpointLayer
  [Layer] for OneShot (single use) Asynchronous Checkpoints. See ServiceBuilderExt::oneshot_checkpoint_async().
• OneShotAsyncCheckpointService
  Service for OneShot (single use) Asynchronous Checkpoints. See ServiceBuilderExt::oneshot_checkpoint_async().