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Add the synchronous gauge to the metric API and SDK (#5304)

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Resolve #5225 

The specification has [added a synchronous gauge
instrument](https://github.com/open-telemetry/opentelemetry-specification/pull/3540).
That instrument has now been
[stabilized](https://github.com/open-telemetry/opentelemetry-specification/pull/4019),
and that stabilization is included in the [next
release](https://github.com/open-telemetry/opentelemetry-specification/pull/4034).

This adds the new synchronous gauge instrument to the metric API and all
implementation we publish.

This change will be a breaking change for any SDK developer. The
`embedded` package is updated to ensure our compatibility guarantees are
meet.

---------

Co-authored-by: David Ashpole <dashpole@google.com>
This commit is contained in:
Tyler Yahn
2024-05-16 09:56:40 -07:00
committed by GitHub
parent 166b3473dd
commit dafe137bbe
24 changed files with 416 additions and 12 deletions
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22
internal/global/meter.go
View File

@@ -164,6 +164,17 @@ func (m *meter) Int64Histogram(name string, options ...metric.Int64HistogramOpti
return i, nil
}
func (m *meter) Int64Gauge(name string, options ...metric.Int64GaugeOption) (metric.Int64Gauge, error) {
if del, ok := m.delegate.Load().(metric.Meter); ok {
return del.Int64Gauge(name, options...)
}
m.mtx.Lock()
defer m.mtx.Unlock()
i := &siGauge{name: name, opts: options}
m.instruments = append(m.instruments, i)
return i, nil
}
func (m *meter) Int64ObservableCounter(name string, options ...metric.Int64ObservableCounterOption) (metric.Int64ObservableCounter, error) {
if del, ok := m.delegate.Load().(metric.Meter); ok {
return del.Int64ObservableCounter(name, options...)
@@ -230,6 +241,17 @@ func (m *meter) Float64Histogram(name string, options ...metric.Float64Histogram
return i, nil
}
func (m *meter) Float64Gauge(name string, options ...metric.Float64GaugeOption) (metric.Float64Gauge, error) {
if del, ok := m.delegate.Load().(metric.Meter); ok {
return del.Float64Gauge(name, options...)
}
m.mtx.Lock()
defer m.mtx.Unlock()
i := &sfGauge{name: name, opts: options}
m.instruments = append(m.instruments, i)
return i, nil
}
func (m *meter) Float64ObservableCounter(name string, options ...metric.Float64ObservableCounterOption) (metric.Float64ObservableCounter, error) {
if del, ok := m.delegate.Load().(metric.Meter); ok {
return del.Float64ObservableCounter(name, options...)