Add Send + Sync to MetricServiceExporter trait and remove Copy fr…

…om generic in `MetricGauge::record` function and the `round` in getter

internal/mithril-metric/src/metric.rs

@@ -86,19 +86,15 @@ impl MetricGauge {
     }
 
     /// Record a value in the gauge.
-    pub fn record<T: Into<f64> + Copy>(&self, value: T) {
-        debug!(
-            self.logger,
-            "Set '{}' gauge value to {}",
-            self.name,
-            value.into()
-        );
-        self.gauge.set(value.into());
+    pub fn record<T: Into<f64>>(&self, value: T) {
+        let value = value.into();
+        debug!(self.logger, "Set '{}' gauge value to {}", self.name, value);
+        self.gauge.set(value);
     }
 
     /// Get the gauge value.
     pub fn get(&self) -> f64 {
-        self.gauge.get().round()
+        self.gauge.get()
     }
 
     fn create_metric_gauge(name: &MetricName, help: &str) -> StdResult<Gauge> {
@@ -142,6 +138,6 @@ mod tests {
         assert_eq!(metric.get(), 0.0);
 
         metric.record(12.3);
-        assert_eq!(metric.get(), 12.0);
+        assert_eq!(metric.get(), 12.3);
     }
 }

internal/mithril-metric/src/server.rs

@@ -14,7 +14,7 @@ use mithril_common::logging::LoggerExtensions;
 use mithril_common::StdResult;
 
 /// Metrics service exporter gives the possibility of exporting metrics.
-pub trait MetricsServiceExporter {
+pub trait MetricsServiceExporter: Send + Sync {
     /// Export metrics.
     fn export_metrics(&self) -> StdResult<String>;
 }
@@ -38,19 +38,19 @@ impl IntoResponse for MetricsServerError {
 }
 
 /// The MetricsServer is responsible for exposing the metrics of the signer.
-pub struct MetricsServer<T: MetricsServiceExporter + Send + Sync> {
+pub struct MetricsServer<T: MetricsServiceExporter> {
     server_port: u16,
     server_ip: String,
     metrics_service: Arc<T>,
     logger: Logger,
 }
 
-struct RouterState<T: MetricsServiceExporter + Send + Sync> {
+struct RouterState<T: MetricsServiceExporter> {
     metrics_service: Arc<T>,
     logger: Logger,
 }
 
-impl<T: MetricsServiceExporter + Send + Sync + 'static> MetricsServer<T> {
+impl<T: MetricsServiceExporter + 'static> MetricsServer<T> {
     /// Create a new MetricsServer instance.
     pub fn new(server_ip: &str, server_port: u16, metrics_service: Arc<T>, logger: Logger) -> Self {
         Self {

mithril-signer/src/metrics/service.rs

@@ -30,7 +30,6 @@ build_metrics_service!(
         "mithril_signer_signature_registration_success_last_epoch",
         "Latest epoch at which signature successfully registered on a Mithril signer node"
     ),
-    // Runtime cycle metrics
     runtime_cycle_success_since_startup_counter:MetricCounter(
         "mithril_signer_runtime_cycle_success_since_startup",
         "Number of successful runtime cycles since startup on a Mithril signer node"