What is the difference between Notify and CancellationToken

[BrandonMFong]

Notify: https://docs.rs/tokio/latest/tokio/sync/struct.Notify.html
CancellationToken: https://docs.rs/tokio-util/latest/tokio_util/sync/struct.CancellationToken.html

[BrandonMFong]

Can both be used across multiple Runtimes or tokio::spawn() tasks?

[Darksonn]

Yes.

[ADD-SP]

CancellationToken always broadcast the cancel notification to all waiters. Notify can just send the notification to a single waiter.

Both can be used cross the tokio runtimes.

[BrandonMFong]

Notify can send notifications to all waiters though: https://docs.rs/tokio/latest/tokio/sync/struct.Notify.html#method.notify_waiters

[BrandonMFong]

Or were saying Notify can also send notification to a single writer

[ADD-SP]

Or were saying Notify can also send notification to a single writer

You are right, sorry for confusing.