Enum FetchState 

pub enum FetchState {
    Idle,
    Pending,
    Receiving,
    Unanswered,
    Done,
}

Fetch lifecycle states.

A fetch settles two things and settles them independently: the publisher’s answer, which arrives on the control stream, and the response stream that carries the objects. Section 6.17: “A publisher MAY send Objects in response to a FETCH before the FETCH_OK message is sent, but the FETCH_OK MUST NOT be sent until the latest group and object are known.”

Section 6.7 says what that freedom is for: a relay “MAY start sending objects immediately in response to a FETCH, even if sending the FETCH_OK takes longer because it requires going upstream to populate the latest object.” So the fetch is over when both have settled, in whichever order they settle.

Variants

Idle

Initial state before any FETCH message is sent.

Pending

FETCH has been sent; the answer is owed and the response stream has not ended.

Receiving

FETCH_OK received; data is being received on the stream.

Unanswered

The response stream has ended and the answer is still owed.

Done

Fetch has ended (error, cancel, FIN, or reset).

Trait Implementations

impl Clone for FetchState

fn clone(&self) -> FetchState

Returns a duplicate of the value.

fn clone_from(&mut self, source: &Self)

Performs copy-assignment from source.

impl Copy for FetchState

impl Debug for FetchState

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

Formats the value using the given formatter.

impl Eq for FetchState

impl PartialEq for FetchState

fn eq(&self, other: &FetchState) -> bool

Equality operator ==.

fn ne(&self, other: &Rhs) -> bool

Inequality operator !=.

impl StructuralPartialEq for FetchState