Struct Position 

pub struct Position;

The key reading this delivery’s FilePosition out of FileContext.

The value is the pinned form: seeking back to it redelivers exactly this message.

Examples

use ruststream_sea_file::file::prelude::*;

#[subscriber(FileStream::new("jobs"))]
async fn audit(job: &Job, Ctx(at): Ctx<Position>) -> HandlerOutcome {
    tracing::info!(job.id, position = ?at, "audited");
    HandlerOutcome::ack()
}

Trait Implementations

impl Clone for Position

fn clone(&self) -> Self

Returns a duplicate of the value.

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

Performs copy-assignment from source.

impl ContextField for Position

type Context = FileContext

The per-delivery context type this key reads from.

type Value = FilePosition

The owned value the key yields.

fn read(self, src: &FileContext) -> FilePosition

Reads this key’s field out of src. Named apart from Field::get so a key implementing both traits stays unambiguous to call.

impl Copy for Position

impl Debug for Position

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

Formats the value using the given formatter.

impl Default for Position

fn default() -> Self

Returns the “default value” for a type.

impl Eq for Position

impl Field<FileContext> for Position

type Value<'a> = FilePosition

The value read through this key, borrowed from the source for 'a.

fn get(self, src: &FileContext) -> FilePosition

Reads this key’s field out of src.

impl Hash for Position

fn hash<__H: Hasher>(&self, state: &mut __H)

Feeds this value into the given Hasher.

fn hash_slice<H>(data: &[Self], state: &mut H)

where H: Hasher, Self: Sized,

Feeds a slice of this type into the given Hasher.

impl PartialEq for Position

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

Equality operator ==.

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

Inequality operator !=.

impl StructuralPartialEq for Position