Counter<T extends num> class

A synchronous instrument that records monotonically increasing values.

A Counter is used to measure a non-negative, monotonically increasing value. Counters only allow positive increments and are appropriate for values that never decrease, such as:

• Request count
• Completed operations
• Error count
• CPU time used
• Bytes sent/received

If the value can decrease, use an UpDownCounter instead.

More information: https://opentelemetry.io/docs/specs/otel/metrics/api/#counter

Implemented types

• APICounter<T>
• SDKInstrument

Constructors

Counter({required APICounter<T> apiCounter, required Meter meter})

Creates a new Counter instance.

Properties

advisory → InstrumentAdvisory?

Returns the advisory parameters of this Counter.

no setter, override

description → String?

Gets the description of this counter.

no setter, override

hashCode → int

The hash code for this object.

no setter, inherited

isCounter → bool

Always true for Counter instruments.

no setter, override

isGauge → bool

Always false for Counter instruments.

no setter, override

isHistogram → bool

Always false for Counter instruments.

no setter, override

isUpDownCounter → bool

Always false for Counter instruments.

no setter, override

meter → APIMeter

Gets the meter that created this counter.

no setter, override

name → String

Gets the name of this counter.

no setter, override

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

unit → String?

Gets the unit of measurement for this counter.

no setter, override

Methods

add(T value, [Attributes? attributes]) → void

Records a measurement with this counter.

override

addWithMap(T value, Map<String, Object> attributeMap) → void

Records a measurement with attributes specified as a map.

override

collectMetrics() → List<Metric>

Collects metrics for this counter.

override

collectPoints() → List<MetricPoint<T>>

Gets the current points for this counter.

getValue([Attributes? attributes]) → T

Gets the current value of the counter for a specific set of attributes.

isEnabled() → bool

Checks if this counter is enabled.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

reset() → void

Resets the counter.

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited