Struct InMemoryBackend

pub struct InMemoryBackend { /* private fields */ }

High-performance in-memory metrics backend using RwLock

This implementation provides:

• Thread-safe concurrent access (multiple readers, single writer)
• O(1) average case lookup and insertion
• Memory-efficient storage
• Lock-free reads when possible

Implementations

impl InMemoryBackend

pub fn new() -> Self

Create a new in-memory backend

pub fn with_capacity(capacity: usize) -> Self

Create a new in-memory backend with initial capacity

pub fn get_stats(&self) -> BackendStats

Get statistics about this backend

pub fn get_metrics_by_namespace(&self, namespace: &str) -> Vec<Metric>

Get metrics by namespace

pub fn get_metrics_by_type(&self, metric_type: MetricType) -> Vec<Metric>

Get metrics by type

pub fn put_metrics(&self, metrics: Vec<Metric>) -> MetricsResult<()>

Bulk insert metrics (more efficient than individual puts)

pub fn remove_metrics_by_namespace( &self, namespace: &str, ) -> MetricsResult<usize>

Remove metrics by namespace

Trait Implementations

impl Debug for InMemoryBackend

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

Formats the value using the given formatter.

impl Default for InMemoryBackend

fn default() -> Self

Returns the “default value” for a type.

impl MetricsBackend for InMemoryBackend

fn as_any(&self) -> &dyn Any

Get a reference to this object as Any for downcasting

fn put_metric(&self, metric: Metric) -> MetricsResult<()>

Store or update a metric

fn get_metric(&self, id: &MetricId) -> MetricsResult<Metric>

Retrieve a metric by ID

fn contains_metric(&self, id: &MetricId) -> bool

Check if a metric exists

fn remove_metric(&self, id: &MetricId) -> MetricsResult<()>

Remove a metric

fn list_metric_ids(&self) -> Vec<MetricId>

Get all metric IDs currently stored

fn list_all_metrics(&self) -> Vec<Metric>

Get all metrics (potentially expensive operation)

fn clear_all(&self) -> MetricsResult<()>

Clear all metrics

fn metric_count(&self) -> usize

Get the number of metrics stored

fn increment_counter(&self, id: &MetricId, delta: u64) -> MetricsResult<u64>

Increment a counter by the given amount

fn set_gauge(&self, id: &MetricId, value: f64) -> MetricsResult<()>

Set a gauge value

fn record_histogram_sample( &self, id: &MetricId, sample: f64, ) -> MetricsResult<()>

Add a sample to a histogram