Enum Event 

pub enum Event<PullError, PushError> {
    Pulling(usize),
    PullError(usize, PullError),
    PullTimeout(usize),
    PullProgress(usize, Range<u64>),
    Pushing(usize, Range<u64>),
    PushError(usize, Range<u64>, PushError),
    PushProgress(Range<u64>),
    Flushing,
    FlushError(PushError),
    Finished(usize),
}

Events emitted during a download session, received via DownloadResult::event_chain.

Each variant records a state change: pulling, pushing, progress, errors, or completion.

Deliberately not #[non_exhaustive]: fast-down’s forwarding layer matches it exhaustively, so a new variant forces that layer to be updated rather than letting the event be dropped silently.

Variants

Pulling(usize)

A worker started fetching its assigned range (carries its id).

PullError(usize, PullError)

A worker failed to fetch its range.

PullTimeout(usize)

A worker’s fetch exceeded its time budget and was aborted.

PullProgress(usize, Range<u64>)

A worker pulled a range into memory (not yet written).

Pushing(usize, Range<u64>)

A worker is handing a pulled range to the sink.

PushError(usize, Range<u64>, PushError)

A worker failed to write a range to the sink.

PushProgress(Range<u64>)

A range was successfully written to the sink.

Flushing

The sink is being flushed.

FlushError(PushError)

Flushing the sink failed.

Finished(usize)

A worker completed its assigned range and exited.

Trait Implementations

impl<PullError, PushError> Debug for Event<PullError, PushError>

where PullError: Debug, PushError: Debug,

fn fmt(&self, f: &mut Formatter<'_>) -> Result<(), Error>

Formats the value using the given formatter.