Struct InMemoryMetrics 

pub struct InMemoryMetrics { /* private fields */ }

Process-local monotonic counter registry.

Implementations

impl InMemoryMetrics

pub fn new() -> Self

Creates an empty counter registry.

pub fn with_limits(max_entries: usize, max_bytes: usize) -> Self

Creates a registry under explicit limits clamped to public safety ceilings.

pub fn increment(&self, name: &str) -> u64

Saturating-increments a named counter and returns its new value.

Invalid or over-capacity new names return zero and increment the corresponding Self::pressure rejection counter. Existing admitted counters can always be incremented.

pub fn try_increment(&self, name: &str) -> Option<u64>

Attempts to increment a counter under the configured admission bounds.

pub fn snapshot(&self) -> Vec<MetricCounter>

Returns counters ordered by name.

pub fn shared_snapshot(&self) -> MetricSnapshot

Returns an immutable sorted snapshot without cloning counter names.

Retaining this view across an update makes that update clone the map nodes. Each retained generation remains alive until its last snapshot clone is dropped. Consumers must bound retained generations; registry pressure reports the current generation, not all consumer-owned views.

pub fn pressure(&self) -> MetricRegistryPressure

Returns current counter cardinality and retained-memory pressure.

Trait Implementations

impl Debug for InMemoryMetrics

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

Formats the value using the given formatter.

impl Default for InMemoryMetrics

fn default() -> Self

Returns the “default value” for a type.