CompositeCounters class

Aggregates all counters from component references under a single component.

It allows to capture metrics and conveniently send them to multiple destinations.

References

• *:counters:*:*:1.0 (optional) ICounters components to pass collected measurements

See ICounters

Example

class MyComponent implements IReferenceable {
    var _counters = new CompositeCounters();

     void setReferences(IReferences references) {
        _counters.setReferences(references);
        ...
    }

    void myMethod() {
       _counters.increment('mycomponent.mymethod.calls');
        var timing =_counters.beginTiming('mycomponent.mymethod.exec_time');
        try {
            ...
        } finally {
            timing.endTiming();
        }
    }
}

Implemented types

• ICounters
• ICounterTimingCallback

Constructors

CompositeCounters([IReferences? references])

Creates a new instance of the counters.

Properties

hashCode → int

The hash code for this object.

no setter, inherited

runtimeType → Type

A representation of the runtime type of the object.

no setter, inherited

Methods

beginTiming(String name) → CounterTiming

Begins measurement of execution time interval. It returns CounterTiming object which has to be called at CounterTiming.endTiming to end the measurement and update the counter.

override

endTiming(String? name, int elapsed) → void

Ends measurement of execution elapsed time and updates specified counter.

override

increment(String? name, int value) → void

Increments counter by given value.

override

incrementOne(String name) → void

Increments counter by 1.

override

last(String name, int value) → void

Records the last calculated measurement value.

override

noSuchMethod(Invocation invocation) → dynamic

Invoked when a nonexistent method or property is accessed.

inherited

setReferences(IReferences references) → void

Sets references to dependent components.

stats(String name, int value) → void

Calculates min/average/max statistics based on the current and previous values.

override

timestamp(String name, DateTime value) → void

Records the given timestamp.

override

timestampNow(String name) → void

Records the current time as a timestamp.

override

toString() → String

A string representation of this object.

inherited

Operators

operator ==(Object other) → bool

The equality operator.

inherited