Struct relay_sampling::evaluation::ReservoirEvaluator

pub struct ReservoirEvaluator<'a> { /* private fields */ }

Utility for evaluating reservoir-based sampling rules.

A “reservoir limit” rule samples every match until its limit is reached, after which the rule is disabled.

This utility uses a dual-counter system for enforcing this limit:

• Local Counter: Each relay instance maintains a local counter to track sampled events.

• Redis Counter: For processing relays, a Redis-based counter provides synchronization across multiple relay-instances. When incremented, the Redis counter returns the current global count for the given rule, which is then used to update the local counter.

Implementations

impl<'a> ReservoirEvaluator<'a>

pub fn new(counters: ReservoirCounters) -> Self

Constructor for ReservoirEvaluator.

pub fn counters(&self) -> ReservoirCounters

Gets shared ownership of the reservoir counters.

pub fn set_redis(&mut self, org_id: u64, redis_pool: &'a RedisPool)

Sets the Redis pool and organiation ID for the ReservoirEvaluator.

These values are needed to synchronize with Redis.

pub fn incr_local(&self, rule: RuleId, limit: i64) -> bool

Evaluates a reservoir rule, returning true if it should be sampled.

pub fn evaluate( &self, rule: RuleId, limit: i64, _rule_expiry: Option<&DateTime<Utc>> ) -> bool

Evaluates a reservoir rule, returning true if it should be sampled.

Trait Implementations

impl<'a> Debug for ReservoirEvaluator<'a>

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

Formats the value using the given formatter.