Struct ExportLedger 

pub struct ExportLedger { /* private fields */ }

The ledger.

Implementations

impl ExportLedger

pub fn new( max_series: usize, scopes: Vec<String>, registry_producers: Option<usize>, started_at: SystemTime, ) -> ExportLedger

An empty ledger over scopes, started at started_at.

registry_producers is None when no registry was loaded — then nothing refines, every key is unregistered, and the snapshot says the registry was not asked rather than that it declares nothing.

pub fn len(&self) -> usize

Distinct series held.

pub fn is_empty(&self) -> bool

pub fn ingest(&mut self, obs: &Observed<'_>, facts: &KeyFacts)

Feed one sample. facts is the key’s projection under the active base and registry (crate::describe_key or a crate::FactsCache entry).

pub fn fold(&mut self, inputs: &FoldInputs<'_>) -> ExportSnapshot

One scrape: the snapshot as of inputs.now.

Two folds with no ingest between them differ only in taken_at_unix_s (and in a quiet judgement a ttl may have crossed) — the exposition carries neither the scrape time nor anything else that moves without traffic, which is what makes an idle scrape byte-identical.

Trait Implementations

impl Debug for ExportLedger

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

Formats the value using the given formatter.