operations-metrics — IMP FORGE

Observability and metrics for Rust applications

Tier	operations
Role	unclassified (baselined)
Path	`crates/operations/metrics`
Edition	2021
Targets	operations_metrics
Public items	54 across 0 modules
Tests	23

What it is for

Observability and metrics library crates for Rust applications.

This crate provides abstractions for collecting and exporting application metrics (counters, gauges, histograms).

Capabilities

`Counter`

Observability and metrics library crates for Rust applications.

Item
`pub struct Counter`
`Counter :: fn new(name : impl Into <String>, help : impl Into <String>) -> Self`
`Counter :: fn with_labels(mut self, labels : Labels) -> Self`
`Counter :: fn inc(& self)`
`Counter :: fn inc_by(& self, v : u64)`
`Counter :: fn get(& self) -> u64`
`Counter :: fn reset(& self)`
`Counter :: fn name(& self) -> & str`
`Counter :: fn help(& self) -> & str`

`Gauge`

Observability and metrics library crates for Rust applications.

Item
`pub struct Gauge`
`Gauge :: fn new(name : impl Into <String>, help : impl Into <String>) -> Self`
`Gauge :: fn with_labels(mut self, labels : Labels) -> Self`
`Gauge :: fn set(& self, v : i64)`
`Gauge :: fn inc(& self)`
`Gauge :: fn dec(& self)`
`Gauge :: fn add(& self, v : i64)`
`Gauge :: fn sub(& self, v : i64)`
`Gauge :: fn get(& self) -> i64`
`Gauge :: fn name(& self) -> & str`

`Histogram`

Observability and metrics library crates for Rust applications.

Item
`pub struct Histogram`
`Histogram :: fn new(name : impl Into <String>, help : impl Into <String>) -> Self`
`Histogram :: fn with_buckets(name : impl Into <String>, help : impl Into <String>, mut buckets : Vec <f64>,) -> Self`
`Histogram :: fn with_labels(mut self, labels : Labels) -> Self`
`Histogram :: fn observe(& self, v : f64)`
`Histogram :: fn get_count(& self) -> u64`
`Histogram :: fn get_sum(& self) -> f64`
`Histogram :: fn get_buckets(& self) -> Vec <HistogramBucket>`
`Histogram :: fn name(& self) -> & str`

`HistogramBucket`

Observability and metrics library crates for Rust applications.

Item
`pub struct HistogramBucket`

`Labels`

Observability and metrics library crates for Rust applications.

Item
`pub type Labels: HashMap <String, String>`

`MetricSample`

Observability and metrics library crates for Rust applications.

Item
`pub struct MetricSample`
`MetricSample :: fn new(name : impl Into <String>, metric_type : MetricType, value : f64) -> Self`
`MetricSample :: fn with_label(mut self, key : impl Into <String>, value : impl Into <String>) -> Self`

`MetricType`

Observability and metrics library crates for Rust applications.

Item
`pub enum MetricType`
`MetricType :: fn fmt(& self, f : & mut std::fmt::Formatter <'_>) -> std::fmt::Result`

`MetricsError`

Observability and metrics library crates for Rust applications.

Item
`pub enum MetricsError`

`Registry:Registry`

Observability and metrics library crates for Rust applications.

Item
`pub struct Registry`

`Registry:counter`

Observability and metrics library crates for Rust applications.

Item
`Registry :: fn counter(& self, name : impl Into <String>, help : impl Into <String>) -> Arc <Counter>`

`Registry:export`

Observability and metrics library crates for Rust applications.

Item
`Registry :: fn export_prometheus(& self) -> String`
`Registry :: fn export_json(& self) -> serde_json::Value`

`Registry:gauge`

Observability and metrics library crates for Rust applications.

Item
`Registry :: fn gauge(& self, name : impl Into <String>, help : impl Into <String>) -> Arc <Gauge>`

`Registry:get`

Observability and metrics library crates for Rust applications.

Item
`Registry :: fn get_counter(& self, name : & str) -> Option <Arc <Counter>>`
`Registry :: fn get_gauge(& self, name : & str) -> Option <Arc <Gauge>>`
`Registry :: fn get_histogram(& self, name : & str) -> Option <Arc <Histogram>>`

`Registry:histogram`

Observability and metrics library crates for Rust applications.

Item
`Registry :: fn histogram(& self, name : impl Into <String>, help : impl Into <String>) -> Arc <Histogram>`

`Registry:new`

Observability and metrics library crates for Rust applications.

Item
`Registry :: fn new() -> Self`

`Registry:register`

Observability and metrics library crates for Rust applications.

Item
`Registry :: fn register_counter(& self, counter : Counter) -> Arc <Counter>`
`Registry :: fn register_gauge(& self, gauge : Gauge) -> Arc <Gauge>`
`Registry :: fn register_histogram(& self, histogram : Histogram) -> Arc <Histogram>`

`Result`

Observability and metrics library crates for Rust applications.

Item
`pub type Result<T>: std::result::Result <T, MetricsError>`

`Timer`

Observability and metrics library crates for Rust applications.

Item
`pub struct Timer`
`Timer :: fn new(histogram : Arc <Histogram>) -> Self`
`Timer :: fn stop(self) -> f64`
`Timer :: fn drop(& mut self)`

How to use it

No examples/ target and no doctest in this crate's rustdoc. The tests listed under Verification are the closest executable usage.

Module structure

No public modules: the crate root is its whole surface.

Public surface

`crate root`

Item	What it is
`pub enum MetricsError`	Errors that can occur with metrics.
`pub type Result<T>: std::result::Result <T, MetricsError>`	Result type for metrics operations.
`pub enum MetricType`	Metric type.
`MetricType :: fn fmt(& self, f : & mut std::fmt::Formatter <'_>) -> std::fmt::Result`	—
`pub type Labels: HashMap <String, String>`	Labels for a metric (key-value pairs).
`pub struct Counter`	A metric counter.
`Counter :: fn new(name : impl Into <String>, help : impl Into <String>) -> Self`	Creates a new counter.
`Counter :: fn with_labels(mut self, labels : Labels) -> Self`	Creates a counter with labels.
`Counter :: fn inc(& self)`	Increments the counter by 1.
`Counter :: fn inc_by(& self, v : u64)`	Increments the counter by a value.
`Counter :: fn get(& self) -> u64`	Gets the current value.
`Counter :: fn reset(& self)`	Resets the counter.
`Counter :: fn name(& self) -> & str`	Gets the metric name.
`Counter :: fn help(& self) -> & str`	Gets the help text.
`pub struct Gauge`	A metric gauge.
`Gauge :: fn new(name : impl Into <String>, help : impl Into <String>) -> Self`	Creates a new gauge.
`Gauge :: fn with_labels(mut self, labels : Labels) -> Self`	Creates a gauge with labels.
`Gauge :: fn set(& self, v : i64)`	Sets the gauge value.
`Gauge :: fn inc(& self)`	Increments the gauge by 1.
`Gauge :: fn dec(& self)`	Decrements the gauge by 1.
`Gauge :: fn add(& self, v : i64)`	Adds to the gauge.
`Gauge :: fn sub(& self, v : i64)`	Subtracts from the gauge.
`Gauge :: fn get(& self) -> i64`	Gets the current value.
`Gauge :: fn name(& self) -> & str`	Gets the metric name.
`pub struct HistogramBucket`	Histogram bucket.
`pub struct Histogram`	A metric histogram.
`Histogram :: fn new(name : impl Into <String>, help : impl Into <String>) -> Self`	Creates a new histogram with default buckets.
`Histogram :: fn with_buckets(name : impl Into <String>, help : impl Into <String>, mut buckets : Vec <f64>,) -> Self`	Creates a histogram with custom buckets.
`Histogram :: fn with_labels(mut self, labels : Labels) -> Self`	Creates a histogram with labels.
`Histogram :: fn observe(& self, v : f64)`	Observes a value.
`Histogram :: fn get_count(& self) -> u64`	Gets the observation count.
`Histogram :: fn get_sum(& self) -> f64`	Gets the sum of observations.
`Histogram :: fn get_buckets(& self) -> Vec <HistogramBucket>`	Gets bucket data.
`Histogram :: fn name(& self) -> & str`	Gets the metric name.
`pub struct Timer`	Timer for measuring duration.
`Timer :: fn new(histogram : Arc <Histogram>) -> Self`	Creates a new timer.
`Timer :: fn stop(self) -> f64`	Stops the timer and records the duration.
`Timer :: fn drop(& mut self)`	—
`pub struct Registry`	Metrics registry.
`Registry :: fn new() -> Self`	Creates a new registry.
`Registry :: fn register_counter(& self, counter : Counter) -> Arc <Counter>`	Registers a counter.
`Registry :: fn register_gauge(& self, gauge : Gauge) -> Arc <Gauge>`	Registers a gauge.
`Registry :: fn register_histogram(& self, histogram : Histogram) -> Arc <Histogram>`	Registers a histogram.
`Registry :: fn get_counter(& self, name : & str) -> Option <Arc <Counter>>`	Gets a counter by name.
`Registry :: fn get_gauge(& self, name : & str) -> Option <Arc <Gauge>>`	Gets a gauge by name.
`Registry :: fn get_histogram(& self, name : & str) -> Option <Arc <Histogram>>`	Gets a histogram by name.
`Registry :: fn counter(& self, name : impl Into <String>, help : impl Into <String>) -> Arc <Counter>`	Gets or creates a counter.
`Registry :: fn gauge(& self, name : impl Into <String>, help : impl Into <String>) -> Arc <Gauge>`	Gets or creates a gauge.
`Registry :: fn histogram(& self, name : impl Into <String>, help : impl Into <String>) -> Arc <Histogram>`	Gets or creates a histogram.
`Registry :: fn export_prometheus(& self) -> String`	Exports metrics in Prometheus format.
`Registry :: fn export_json(& self) -> serde_json::Value`	Exports metrics as JSON.
`pub struct MetricSample`	Metric sample for export.
`MetricSample :: fn new(name : impl Into <String>, metric_type : MetricType, value : f64) -> Self`	Creates a new sample.
`MetricSample :: fn with_label(mut self, key : impl Into <String>, value : impl Into <String>) -> Self`	Adds a label.

No pub use re-exports: every item above is declared in this crate.

Boundary

Depends on no other workspace tier.

Shares tier operations with 40 other crates: operations-approval-workflow, operations-assessments, operations-block-imaging, operations-boot-media, operations-browser-agent-worker, operations-camera-discovery, operations-camera-liveview, operations-camera-registry, … (40 total).

_What this crate deliberately does NOT own is a judgment. No committed registry records one for it, so none is stated here._

Where it sits

Tier (ontology)	`operations`
Architectural role (taxonomy)	`unclassified (baselined)`
Location	`crates/operations/metrics`
Vocabulary in force (lexicon)	`current`

Dependencies

Runtime, from outside the workspace.

Crate	Requirement	Features	Optional	Only on
`chrono`	`^0.4`	`serde`	no	always
`serde`	`^1`	`derive`	no	always
`serde_json`	`^1`	—	no	always
`thiserror`	`^2`	—	no	always

Development, from outside the workspace.

Crate	Requirement	Features	Optional	Only on
`tokio`	`^1`	`full`	no	always

Build. None.

Depended on by. 1 workspace crate.

Signal flow — what reaches this crate, and what it reaches.

flowchart LR
  n_application_metrics["application-metrics"] -->|uses| SELF
  SELF["operations-metrics"]
  classDef self fill:#1f883d,stroke:#1f883d,color:#fff;
  class SELF self;

Feature flags

No Cargo features are defined: every capability is unconditional, so no consumer can receive a half-wired crate.

Targets

Kind	Name	Source
lib	`operations_metrics`	`src/lib.rs`

Error model

Error type	Named by
`MetricsError`	`Result`

Operational characteristics

Property	Evidence
async public surface	none detected
async runtime	none detected
database access	none detected
network I/O	none detected
unsafe code	none detected
environment variables	none detected

No unsafe block, unsafe fn, unsafe impl or unsafe trait was found by the parser anywhere in this crate's source.

Configuration

No environment variable is read with a literal name anywhere in this crate. A variable whose key is computed at run time cannot be listed here, and is not claimed to be absent.

1 workspace crate depends on this one: application-metrics.

Verification

Kind	Count
Unit tests	23
Integration tests	0
Examples	0
Doctests	0

Evidence by module. How often each public module is named by something executable.

Module	Tests	Examples	Consumers
`crate root`	11	0	1

What the tests establish, by name:

test_counter_inc — src/lib.rs
test_counter_inc_by — src/lib.rs
test_counter_new — src/lib.rs
test_counter_reset — src/lib.rs
test_counter_with_labels — src/lib.rs
test_error_display — src/lib.rs
test_gauge_add_sub — src/lib.rs
test_gauge_inc_dec — src/lib.rs
test_gauge_new — src/lib.rs
test_gauge_set — src/lib.rs
test_histogram_bucket_serialization — src/lib.rs
test_histogram_buckets — src/lib.rs
test_histogram_new — src/lib.rs
test_histogram_observe — src/lib.rs
test_metric_sample_new — src/lib.rs
test_metric_type_display — src/lib.rs
test_registry_counter — src/lib.rs
test_registry_export_json — src/lib.rs
test_registry_export_prometheus — src/lib.rs
test_registry_gauge — src/lib.rs
test_registry_histogram — src/lib.rs
test_registry_new — src/lib.rs
test_timer — src/lib.rs

Documentation coverage

Measure	Documented	Total
Public items with rustdoc	52	54
Public modules with a `//!` block	0	0

pie showData
    title Public items with rustdoc
    "Documented" : 52
    "No rustdoc detected" : 2

Metrics

Metric	Value
Rust source files	1
Source lines	755
Code lines	572
Public API items	54
Public modules	0
Tests	23
Examples	0
Cargo features	0
Direct runtime dependencies	4
Workspace reverse dependencies	1

pie showData
    title Public API by kind
    "enum" : 2
    "method" : 43
    "struct" : 7
    "type alias" : 2

pie showData
    title Rust source composition
    "Code" : 572
    "Blank or comment" : 183

Generation

Rendered by tools-corpus corpus readme from repository evidence alone, renderer schema 2, lexicon current. No model, network service or database was consulted. Regenerate with tools-corpus corpus readme --write; verify with --check.

What it is for

Capabilities

Counter

Gauge

Histogram

HistogramBucket

Labels

MetricSample

MetricType

MetricsError

Registry:Registry

Registry:counter

Registry:export

Registry:gauge

Registry:get

Registry:histogram

Registry:new

Registry:register

Result

Timer

How to use it

Module structure

Public surface

Boundary

Where it sits

Dependencies

Feature flags

Targets

Error model

Operational characteristics

Configuration

Related capabilities

Verification

Documentation coverage

Metrics

Generation

`Counter`

`Gauge`

`Histogram`

`HistogramBucket`

`Labels`

`MetricSample`

`MetricType`

`MetricsError`

`Registry:Registry`

`Registry:counter`

`Registry:export`

`Registry:gauge`

`Registry:get`

`Registry:histogram`

`Registry:new`

`Registry:register`

`Result`

`Timer`