> For clean Markdown of any page, append .md to the page URL.
> For a complete documentation index, see https://docs.nvidia.com/nemo/relay/dev/reference/api/rust-library-reference/nemo-relay/subscriber/llms.txt.
> For AI client integration (Claude Code, Cursor, etc.), connect to the MCP server at https://docs.nvidia.com/nemo/relay/_mcp/server.

# Module subscriber

> Lifecycle event subscriptions and delivery barriers.

Generated from `cargo doc --no-deps -p nemo-relay-builtins -p nemo-relay-diagnostics -p nemo-relay-logging -p nemo-relay-plugin-host -p nemo-relay-codecs -p nemo-relay -p nemo-relay-runtime -p nemo-relay-model-pricing -p nemo-relay-resource-metrics -p nemo-relay-observability -p nemo-relay-adaptive -p nemo-relay-pii-redaction -p nemo-relay-ffi -p nemo-relay-types -p nemo-relay-plugin -p nemo-relay-worker-proto -p nemo-relay-worker`.

Lifecycle event subscriptions and delivery barriers.

## Functions

* [deregister_subscriber](/reference/api/rust-library-reference/nemo-relay/subscriber/fn-deregister-subscriber): Deregister a global lifecycle event subscriber.
* [flush_subscribers](/reference/api/rust-library-reference/nemo-relay/subscriber/fn-flush-subscribers): Wait for all subscriber callbacks and managed terminal publications registered before this call to finish, including publications emitted transitively by those callbacks.
* [register_subscriber](/reference/api/rust-library-reference/nemo-relay/subscriber/fn-register-subscriber): Register a global lifecycle event subscriber.
* [scope_deregister_subscriber](/reference/api/rust-library-reference/nemo-relay/subscriber/fn-scope-deregister-subscriber): Deregister a scope-local lifecycle event subscriber.
* [scope_register_subscriber](/reference/api/rust-library-reference/nemo-relay/subscriber/fn-scope-register-subscriber): Register a scope-local lifecycle event subscriber.

## Type Aliases

* [EventSubscriberFn](/reference/api/rust-library-reference/nemo-relay/subscriber/type-eventsubscriberfn): Consume runtime lifecycle events after they are emitted.

> Lifecycle event subscriptions and delivery barriers.

## Docs

- [Function deregister_subscriber](https://docs.nvidia.com/nemo/relay/dev/reference/api/rust-library-reference/nemo-relay/subscriber/fn-deregister-subscriber.md): Deregister a global lifecycle event subscriber.
- [Function flush_subscribers](https://docs.nvidia.com/nemo/relay/dev/reference/api/rust-library-reference/nemo-relay/subscriber/fn-flush-subscribers.md): Wait for all subscriber callbacks and managed terminal publications registered before this call to finish, including publications emitted transitively by those callbacks.
- [Function register_subscriber](https://docs.nvidia.com/nemo/relay/dev/reference/api/rust-library-reference/nemo-relay/subscriber/fn-register-subscriber.md): Register a global lifecycle event subscriber.
- [Function scope_deregister_subscriber](https://docs.nvidia.com/nemo/relay/dev/reference/api/rust-library-reference/nemo-relay/subscriber/fn-scope-deregister-subscriber.md): Deregister a scope-local lifecycle event subscriber.
- [Function scope_register_subscriber](https://docs.nvidia.com/nemo/relay/dev/reference/api/rust-library-reference/nemo-relay/subscriber/fn-scope-register-subscriber.md): Register a scope-local lifecycle event subscriber.
- [Type Alias Event Subscriber Fn](https://docs.nvidia.com/nemo/relay/dev/reference/api/rust-library-reference/nemo-relay/subscriber/type-eventsubscriberfn.md): Consume runtime lifecycle events after they are emitted.