1 files changed, 126 insertions, 0 deletions
diff --git a/third_party/rust/glean-core/src/metrics/quantity.rs b/third_party/rust/glean-core/src/metrics/quantity.rs
new file mode 100644
index 0000000000..c59d3a4a21
--- /dev/null
+++ b/third_party/rust/glean-core/src/metrics/quantity.rs
@@ -0,0 +1,126 @@
+// This Source Code Form is subject to the terms of the Mozilla Public
+// License, v. 2.0. If a copy of the MPL was not distributed with this
+// file, You can obtain one at https://mozilla.org/MPL/2.0/.
+
+use crate::common_metric_data::CommonMetricDataInternal;
+use crate::error_recording::{record_error, test_get_num_recorded_errors, ErrorType};
+use crate::metrics::Metric;
+use crate::metrics::MetricType;
+use crate::storage::StorageManager;
+use crate::CommonMetricData;
+use crate::Glean;
+
+/// A quantity metric.
+///
+/// Used to store explicit non-negative integers.
+#[derive(Clone, Debug)]
+pub struct QuantityMetric {
+    meta: CommonMetricDataInternal,
+}
+
+impl MetricType for QuantityMetric {
+    fn meta(&self) -> &CommonMetricDataInternal {
+        &self.meta
+    }
+}
+
+// IMPORTANT:
+//
+// When changing this implementation, make sure all the operations are
+// also declared in the related trait in `../traits/`.
+impl QuantityMetric {
+    /// Creates a new quantity metric.
+    pub fn new(meta: CommonMetricData) -> Self {
+        Self { meta: meta.into() }
+    }
+
+    /// Sets the value. Must be non-negative.
+    ///
+    /// # Arguments
+    ///
+    /// * `value` - The value. Must be non-negative.
+    ///
+    /// ## Notes
+    ///
+    /// Logs an error if the `value` is negative.
+    pub fn set(&self, value: i64) {
+        let metric = self.clone();
+        crate::launch_with_glean(move |glean| metric.set_sync(glean, value))
+    }
+
+    /// Sets the value synchronously. Must be non-negative.
+    #[doc(hidden)]
+    pub fn set_sync(&self, glean: &Glean, value: i64) {
+        if !self.should_record(glean) {
+            return;
+        }
+
+        if value < 0 {
+            record_error(
+                glean,
+                &self.meta,
+                ErrorType::InvalidValue,
+                format!("Set negative value {}", value),
+                None,
+            );
+            return;
+        }
+
+        glean
+            .storage()
+            .record(glean, &self.meta, &Metric::Quantity(value))
+    }
+
+    /// Get current value.
+    #[doc(hidden)]
+    pub fn get_value<'a, S: Into<Option<&'a str>>>(
+        &self,
+        glean: &Glean,
+        ping_name: S,
+    ) -> Option<i64> {
+        let queried_ping_name = ping_name
+            .into()
+            .unwrap_or_else(|| &self.meta().inner.send_in_pings[0]);
+
+        match StorageManager.snapshot_metric_for_test(
+            glean.storage(),
+            queried_ping_name,
+            &self.meta.identifier(glean),
+            self.meta.inner.lifetime,
+        ) {
+            Some(Metric::Quantity(i)) => Some(i),
+            _ => None,
+        }
+    }
+
+    /// **Test-only API (exported for FFI purposes).**
+    ///
+    /// Gets the currently stored value as an integer.
+    ///
+    /// This doesn't clear the stored value.
+    pub fn test_get_value(&self, ping_name: Option<String>) -> Option<i64> {
+        crate::block_on_dispatcher();
+        crate::core::with_glean(|glean| self.get_value(glean, ping_name.as_deref()))
+    }
+
+    /// **Exported for test purposes.**
+    ///
+    /// Gets the number of recorded errors for the given metric and error type.
+    ///
+    /// # Arguments
+    ///
+    /// * `error` - The type of error
+    /// * `ping_name` - represents the optional name of the ping to retrieve the
+    ///   metric for. Defaults to the first value in `send_in_pings`.
+    ///
+    /// # Returns
+    ///
+    /// The number of errors reported.
+    pub fn test_get_num_recorded_errors(&self, error: ErrorType) -> i32 {
+        crate::block_on_dispatcher();
+
+        crate::core::with_glean(|glean| {
+            test_get_num_recorded_errors(glean, self.meta(), error).unwrap_or(0)
+        })
+    }
+}