Package io.opentelemetry.api.metrics

Interface LongCounter

  • All Superinterfaces:
    Instrument, SynchronousInstrument<LongCounter.BoundLongCounter>
    @ThreadSafe
public interface LongCounter
extends SynchronousInstrument<LongCounter.BoundLongCounter>
    Counter is the most common synchronous instrument. This instrument supports an add(long, Labels)` function for reporting an increment, and is restricted to non-negative increments. The default aggregation is `Sum`.

    Example: 

    
 class YourClass {
   private static final Meter meter = OpenTelemetry.getMeterProvider().get("my_library_name");
   private static final LongCounter counter =
       meter.
           .longCounterBuilder("processed_jobs")
           .setDescription("Processed jobs")
           .setUnit("1")
           .build();

   // It is recommended that the API user keep a reference to a Bound Counter.
   private static final BoundLongCounter someWorkBound =
       counter.bind("work_name", "some_work");

   void doSomeWork() {
      // Your code here.
      someWorkBound.add(10);
   }
 }

    • Method Detail

      • add

        void add​(long increment,
         Labels labels)
        Adds the given increment to the current value. The values cannot be negative.

        The value added is associated with the current Context and provided set of labels.

        Parameters:
        increment - the value to add.
        labels - the set of labels to be associated to this recording.

      • add

        void add​(long increment)
        Adds the given increment to the current value. The values cannot be negative.

        The value added is associated with the current Context and empty labels.

        Parameters:
        increment - the value to add.

      • bind

        LongCounter.BoundLongCounter bind​(Labels labels)
        Description copied from interface: SynchronousInstrument
        Returns a Bound Instrument associated with the specified labels. Multiples requests with the same set of labels may return the same Bound Instrument instance.

        It is recommended that callers keep a reference to the Bound Instrument instead of always calling this method for every operation.

        Specified by:
        bind in interface SynchronousInstrument<LongCounter.BoundLongCounter>
        Parameters:
        labels - the set of labels, as key-value pairs.
        Returns:
        a Bound Instrument