Support float and duration metrics (#508)

Fixes #493

temporalio/bridge/metric.py

@@ -75,6 +75,46 @@ def record(self, value: int, attrs: MetricAttributes) -> None:
         self._ref.record(value, attrs._ref)
 
 
+class MetricHistogramFloat:
+    """Metric histogram using SDK Core."""
+
+    def __init__(
+        self,
+        meter: MetricMeter,
+        name: str,
+        description: Optional[str],
+        unit: Optional[str],
+    ) -> None:
+        """Initialize histogram."""
+        self._ref = meter._ref.new_histogram_float(name, description, unit)
+
+    def record(self, value: float, attrs: MetricAttributes) -> None:
+        """Record value on histogram."""
+        if value < 0:
+            raise ValueError("Metric value must be non-negative value")
+        self._ref.record(value, attrs._ref)
+
+
+class MetricHistogramDuration:
+    """Metric histogram using SDK Core."""
+
+    def __init__(
+        self,
+        meter: MetricMeter,
+        name: str,
+        description: Optional[str],
+        unit: Optional[str],
+    ) -> None:
+        """Initialize histogram."""
+        self._ref = meter._ref.new_histogram_duration(name, description, unit)
+
+    def record(self, value_ms: int, attrs: MetricAttributes) -> None:
+        """Record value on histogram."""
+        if value_ms < 0:
+            raise ValueError("Metric value must be non-negative value")
+        self._ref.record(value_ms, attrs._ref)
+
+
 class MetricGauge:
     """Metric gauge using SDK Core."""
 
@@ -95,6 +135,26 @@ def set(self, value: int, attrs: MetricAttributes) -> None:
         self._ref.set(value, attrs._ref)
 
 
+class MetricGaugeFloat:
+    """Metric gauge using SDK Core."""
+
+    def __init__(
+        self,
+        meter: MetricMeter,
+        name: str,
+        description: Optional[str],
+        unit: Optional[str],
+    ) -> None:
+        """Initialize gauge."""
+        self._ref = meter._ref.new_gauge_float(name, description, unit)
+
+    def set(self, value: float, attrs: MetricAttributes) -> None:
+        """Set value on gauge."""
+        if value < 0:
+            raise ValueError("Metric value must be non-negative value")
+        self._ref.set(value, attrs._ref)
+
+
 class MetricAttributes:
     """Metric attributes using SDK Core."""
 

temporalio/bridge/runtime.py

@@ -27,9 +27,9 @@ def __init__(self, *, telemetry: TelemetryConfig) -> None:
         """Create SDK Core runtime."""
         self._ref = temporalio.bridge.temporal_sdk_bridge.init_runtime(telemetry)
 
-    def retrieve_buffered_metrics(self) -> Sequence[Any]:
+    def retrieve_buffered_metrics(self, durations_as_seconds: bool) -> Sequence[Any]:
         """Get buffered metrics."""
-        return self._ref.retrieve_buffered_metrics()
+        return self._ref.retrieve_buffered_metrics(durations_as_seconds)
 
     def write_test_info_log(self, message: str, extra_data: str) -> None:
         """Write a test core log at INFO level."""

temporalio/bridge/src/client.rs

@@ -5,8 +5,8 @@ use std::str::FromStr;
 use std::time::Duration;
 use temporal_client::{
     ClientKeepAliveConfig as CoreClientKeepAliveConfig, ClientOptions, ClientOptionsBuilder,
-    ConfiguredClient, HealthService, OperatorService, RetryClient, RetryConfig,
-    TemporalServiceClientWithMetrics, TestService, TlsConfig, WorkflowService, HttpConnectProxyOptions,
+    ConfiguredClient, HealthService, HttpConnectProxyOptions, OperatorService, RetryClient,
+    RetryConfig, TemporalServiceClientWithMetrics, TestService, TlsConfig, WorkflowService,
 };
 use tonic::metadata::MetadataKey;
 use url::Url;
@@ -467,4 +467,4 @@ impl From<ClientHttpConnectProxyConfig> for HttpConnectProxyOptions {
             basic_auth: conf.basic_auth,
         }
     }
-}
+}

temporalio/bridge/src/lib.rs

@@ -19,7 +19,10 @@ fn temporal_sdk_bridge(py: Python, m: &PyModule) -> PyResult<()> {
     m.add_class::<metric::MetricAttributesRef>()?;
     m.add_class::<metric::MetricCounterRef>()?;
     m.add_class::<metric::MetricHistogramRef>()?;
+    m.add_class::<metric::MetricHistogramFloatRef>()?;
+    m.add_class::<metric::MetricHistogramDurationRef>()?;
     m.add_class::<metric::MetricGaugeRef>()?;
+    m.add_class::<metric::MetricGaugeFloatRef>()?;
     m.add_class::<metric::BufferedMetricUpdate>()?;
     m.add_class::<metric::BufferedMetric>()?;
     m.add_function(wrap_pyfunction!(new_metric_meter, m)?)?;

temporalio/bridge/src/metric.rs

@@ -1,4 +1,5 @@
 use std::any::Any;
+use std::time::Duration;
 use std::{collections::HashMap, sync::Arc};
 
 use pyo3::prelude::*;
@@ -32,11 +33,26 @@ pub struct MetricHistogramRef {
     histogram: Arc<dyn metrics::Histogram>,
 }
 
+#[pyclass]
+pub struct MetricHistogramFloatRef {
+    histogram: Arc<dyn metrics::HistogramF64>,
+}
+
+#[pyclass]
+pub struct MetricHistogramDurationRef {
+    histogram: Arc<dyn metrics::HistogramDuration>,
+}
+
 #[pyclass]
 pub struct MetricGaugeRef {
     gauge: Arc<dyn metrics::Gauge>,
 }
 
+#[pyclass]
+pub struct MetricGaugeFloatRef {
+    gauge: Arc<dyn metrics::GaugeF64>,
+}
+
 pub fn new_metric_meter(runtime_ref: &runtime::RuntimeRef) -> Option<MetricMeterRef> {
     runtime_ref
         .runtime
@@ -84,6 +100,36 @@ impl MetricMeterRef {
         }
     }
 
+    fn new_histogram_float(
+        &self,
+        name: String,
+        description: Option<String>,
+        unit: Option<String>,
+    ) -> MetricHistogramFloatRef {
+        MetricHistogramFloatRef {
+            histogram: self.meter.inner.histogram_f64(build_metric_parameters(
+                name,
+                description,
+                unit,
+            )),
+        }
+    }
+
+    fn new_histogram_duration(
+        &self,
+        name: String,
+        description: Option<String>,
+        unit: Option<String>,
+    ) -> MetricHistogramDurationRef {
+        MetricHistogramDurationRef {
+            histogram: self.meter.inner.histogram_duration(build_metric_parameters(
+                name,
+                description,
+                unit,
+            )),
+        }
+    }
+
     fn new_gauge(
         &self,
         name: String,
@@ -97,6 +143,20 @@ impl MetricMeterRef {
                 .gauge(build_metric_parameters(name, description, unit)),
         }
     }
+
+    fn new_gauge_float(
+        &self,
+        name: String,
+        description: Option<String>,
+        unit: Option<String>,
+    ) -> MetricGaugeFloatRef {
+        MetricGaugeFloatRef {
+            gauge: self
+                .meter
+                .inner
+                .gauge_f64(build_metric_parameters(name, description, unit)),
+        }
+    }
 }
 
 #[pymethods]
@@ -113,13 +173,35 @@ impl MetricHistogramRef {
     }
 }
 
+#[pymethods]
+impl MetricHistogramFloatRef {
+    fn record(&self, value: f64, attrs_ref: &MetricAttributesRef) {
+        self.histogram.record(value, &attrs_ref.attrs);
+    }
+}
+
+#[pymethods]
+impl MetricHistogramDurationRef {
+    fn record(&self, value_ms: u64, attrs_ref: &MetricAttributesRef) {
+        self.histogram
+            .record(Duration::from_millis(value_ms), &attrs_ref.attrs);
+    }
+}
+
 #[pymethods]
 impl MetricGaugeRef {
     fn set(&self, value: u64, attrs_ref: &MetricAttributesRef) {
         self.gauge.record(value, &attrs_ref.attrs);
     }
 }
 
+#[pymethods]
+impl MetricGaugeFloatRef {
+    fn set(&self, value: f64, attrs_ref: &MetricAttributesRef) {
+        self.gauge.record(value, &attrs_ref.attrs);
+    }
+}
+
 fn build_metric_parameters(
     name: String,
     description: Option<String>,
@@ -192,16 +274,18 @@ pub struct BufferedMetricUpdate {
 }
 
 #[derive(Clone)]
-pub struct BufferedMetricUpdateValue(metrics::MetricUpdateVal);
+pub enum BufferedMetricUpdateValue {
+    U64(u64),
+    U128(u128),
+    F64(f64),
+}
 
 impl IntoPy<PyObject> for BufferedMetricUpdateValue {
     fn into_py(self, py: Python) -> PyObject {
-        match self.0 {
-            metrics::MetricUpdateVal::Delta(v) => v.into_py(py),
-            metrics::MetricUpdateVal::DeltaF64(v) => v.into_py(py),
-            metrics::MetricUpdateVal::Value(v) => v.into_py(py),
-            metrics::MetricUpdateVal::ValueF64(v) => v.into_py(py),
-            metrics::MetricUpdateVal::Duration(v) => v.as_millis().into_py(py),
+        match self {
+            BufferedMetricUpdateValue::U64(v) => v.into_py(py),
+            BufferedMetricUpdateValue::U128(v) => v.into_py(py),
+            BufferedMetricUpdateValue::F64(v) => v.into_py(py),
         }
     }
 }
@@ -236,16 +320,18 @@ impl CustomMetricAttributes for BufferedMetricAttributes {
 pub fn convert_metric_events<'p>(
     py: Python<'p>,
     events: Vec<MetricEvent<BufferedMetricRef>>,
+    durations_as_seconds: bool,
 ) -> Vec<BufferedMetricUpdate> {
     events
         .into_iter()
-        .filter_map(|e| convert_metric_event(py, e))
+        .filter_map(|e| convert_metric_event(py, e, durations_as_seconds))
         .collect()
 }
 
 fn convert_metric_event<'p>(
     py: Python<'p>,
     event: MetricEvent<BufferedMetricRef>,
+    durations_as_seconds: bool,
 ) -> Option<BufferedMetricUpdate> {
     match event {
         // Create the metric and put it on the lazy ref
@@ -262,9 +348,19 @@ fn convert_metric_event<'p>(
                         description: Some(params.description)
                             .filter(|s| !s.is_empty())
                             .map(|s| s.to_string()),
-                        unit: Some(params.unit)
-                            .filter(|s| !s.is_empty())
-                            .map(|s| s.to_string()),
+                        unit: if matches!(kind, metrics::MetricKind::HistogramDuration)
+                            && params.unit == "duration"
+                        {
+                            if durations_as_seconds {
+                                Some("s".to_owned())
+                            } else {
+                                Some("ms".to_owned())
+                            }
+                        } else if params.unit.is_empty() {
+                            None
+                        } else {
+                            Some(params.unit.to_string())
+                        },
                         kind: match kind {
                             metrics::MetricKind::Counter => 0,
                             metrics::MetricKind::Gauge | metrics::MetricKind::GaugeF64 => 1,
@@ -324,7 +420,18 @@ fn convert_metric_event<'p>(
             update,
         } => Some(BufferedMetricUpdate {
             metric: instrument.get().clone().0.clone(),
-            value: BufferedMetricUpdateValue(update),
+            value: match update {
+                metrics::MetricUpdateVal::Duration(v) if durations_as_seconds => {
+                    BufferedMetricUpdateValue::F64(v.as_secs_f64())
+                }
+                metrics::MetricUpdateVal::Duration(v) => {
+                    BufferedMetricUpdateValue::U128(v.as_millis())
+                }
+                metrics::MetricUpdateVal::Delta(v) => BufferedMetricUpdateValue::U64(v),
+                metrics::MetricUpdateVal::DeltaF64(v) => BufferedMetricUpdateValue::F64(v),
+                metrics::MetricUpdateVal::Value(v) => BufferedMetricUpdateValue::U64(v),
+                metrics::MetricUpdateVal::ValueF64(v) => BufferedMetricUpdateValue::F64(v),
+            },
             attributes: attributes
                 .get()
                 .clone()

temporalio/bridge/src/runtime.rs

@@ -205,14 +205,19 @@ impl Drop for Runtime {
 
 #[pymethods]
 impl RuntimeRef {
-    fn retrieve_buffered_metrics<'p>(&self, py: Python<'p>) -> Vec<BufferedMetricUpdate> {
+    fn retrieve_buffered_metrics<'p>(
+        &self,
+        py: Python<'p>,
+        durations_as_seconds: bool,
+    ) -> Vec<BufferedMetricUpdate> {
         convert_metric_events(
             py,
             self.runtime
                 .metrics_call_buffer
                 .as_ref()
                 .expect("Attempting to retrieve buffered metrics without buffer")
                 .retrieve(),
+            durations_as_seconds,
         )
     }