fix(telemetry): Report cause of compute exporter failure

2 files changed, 8 insertions, 1 deletions

diff --git a/opendc-telemetry/opendc-telemetry-compute/src/main/kotlin/org/opendc/telemetry/compute/ComputeMetricAggregator.kt b/opendc-telemetry/opendc-telemetry-compute/src/main/kotlin/org/opendc/telemetry/compute/ComputeMetricAggregator.kt
index 679d5944..738ec38b 100644
--- a/opendc-telemetry/opendc-telemetry-compute/src/main/kotlin/org/opendc/telemetry/compute/ComputeMetricAggregator.kt
+++ b/opendc-telemetry/opendc-telemetry-compute/src/main/kotlin/org/opendc/telemetry/compute/ComputeMetricAggregator.kt
@@ -412,7 +412,7 @@ public class ComputeMetricAggregator {
         /**
          * The [HostInfo] of the host on which the server is hosted.
          */
-        var host: HostInfo? = null
+        @JvmField var host: HostInfo? = null
 
         private var timestamp = Long.MIN_VALUE
         @JvmField var uptime: Long = 0
diff --git a/opendc-telemetry/opendc-telemetry-compute/src/main/kotlin/org/opendc/telemetry/compute/ComputeMetricExporter.kt b/opendc-telemetry/opendc-telemetry-compute/src/main/kotlin/org/opendc/telemetry/compute/ComputeMetricExporter.kt
index 580cc6fb..3ab6c7b2 100644
--- a/opendc-telemetry/opendc-telemetry-compute/src/main/kotlin/org/opendc/telemetry/compute/ComputeMetricExporter.kt
+++ b/opendc-telemetry/opendc-telemetry-compute/src/main/kotlin/org/opendc/telemetry/compute/ComputeMetricExporter.kt
@@ -25,12 +25,18 @@ package org.opendc.telemetry.compute
 import io.opentelemetry.sdk.common.CompletableResultCode
 import io.opentelemetry.sdk.metrics.data.*
 import io.opentelemetry.sdk.metrics.export.MetricExporter
+import mu.KotlinLogging
 
 /**
  * A [MetricExporter] that redirects data to a [ComputeMonitor] implementation.
  */
 public abstract class ComputeMetricExporter : MetricExporter, ComputeMonitor {
     /**
+     * The logging instance for this exporter.
+     */
+    private val logger = KotlinLogging.logger {}
+
+    /**
      * A [ComputeMetricAggregator] that actually performs the aggregation.
      */
     private val agg = ComputeMetricAggregator()
@@ -42,6 +48,7 @@ public abstract class ComputeMetricExporter : MetricExporter, ComputeMonitor {
 
             CompletableResultCode.ofSuccess()
         } catch (e: Throwable) {
+            logger.warn(e) { "Failed to export results" }
             CompletableResultCode.ofFailure()
         }
     }