Add meter provider configurer to change observable up down counter to…

java/agent-nr-config/otel-initializer/src/main/java/com/newrelic/otel/initializer/Customizer.java

@@ -7,14 +7,15 @@
 import io.opentelemetry.sdk.resources.Resource;
 import java.util.UUID;
 
+/**
+ * Note this class is wired into SPI via {@code
+ * resources/META-INF/services/io.opentelemetry.sdk.autoconfigure.spi.AutoConfigurationCustomizerProvider}
+ */
 public class Customizer implements AutoConfigurationCustomizerProvider {
 
-  /**
-   * Add additional resource attributes programmatically. NOTE: This class is referenced in {@code
-   * /resources/META-INF/services/io.opentelemetry.sdk.autoconfigure.spi.ResourceProvider}.
-   */
   @Override
   public void customize(AutoConfigurationCustomizer autoConfiguration) {
+    // Add additional resource attributes programmatically
     autoConfiguration.addResourceCustomizer(
         (resource, configProperties) ->
             resource.merge(

java/agent-nr-config/otel-initializer/src/main/java/com/newrelic/otel/initializer/MeterProviderCustomizer.java

@@ -0,0 +1,27 @@
+package com.newrelic.otel.initializer;
+
+import io.opentelemetry.sdk.autoconfigure.spi.ConfigProperties;
+import io.opentelemetry.sdk.autoconfigure.spi.metrics.SdkMeterProviderConfigurer;
+import io.opentelemetry.sdk.metrics.SdkMeterProviderBuilder;
+import io.opentelemetry.sdk.metrics.common.InstrumentType;
+import io.opentelemetry.sdk.metrics.view.Aggregation;
+import io.opentelemetry.sdk.metrics.view.InstrumentSelector;
+import io.opentelemetry.sdk.metrics.view.View;
+
+/**
+ * Note this class is wired into SPI via {@code
+ * resources/META-INF/services/com.newrelic.otel.initializer.SdkMeterProviderConfigurer}
+ */
+public class MeterProviderCustomizer implements SdkMeterProviderConfigurer {
+
+  @Override
+  public void configure(SdkMeterProviderBuilder meterProviderBuilder, ConfigProperties config) {
+    // Aggregate OBSERVABLE_UP_DOWN_SUM as gauge instead of sum. This allows OBSERVABLE_UP_DOWN_SUM
+    // data to still be useful when aggregation temporality is set to DELTA.
+    meterProviderBuilder.registerView(
+        InstrumentSelector.builder()
+            .setInstrumentType(InstrumentType.OBSERVABLE_UP_DOWN_SUM)
+            .build(),
+        View.builder().setAggregation(Aggregation.lastValue()).build());
+  }
+}

java/agent-nr-config/otel-initializer/src/main/resources/META-INF/services/io.opentelemetry.sdk.autoconfigure.spi.metrics.SdkMeterProviderConfigurer

@@ -0,0 +1 @@
+com.newrelic.otel.initializer.MeterProviderCustomizer

java/shared-utils/src/main/java/com/newrelic/shared/OpenTelemetryConfig.java

@@ -17,8 +17,12 @@
 import io.opentelemetry.sdk.logs.SdkLogEmitterProvider;
 import io.opentelemetry.sdk.logs.export.BatchLogProcessor;
 import io.opentelemetry.sdk.metrics.SdkMeterProvider;
+import io.opentelemetry.sdk.metrics.common.InstrumentType;
 import io.opentelemetry.sdk.metrics.data.AggregationTemporality;
 import io.opentelemetry.sdk.metrics.export.PeriodicMetricReader;
+import io.opentelemetry.sdk.metrics.view.Aggregation;
+import io.opentelemetry.sdk.metrics.view.InstrumentSelector;
+import io.opentelemetry.sdk.metrics.view.View;
 import io.opentelemetry.sdk.resources.Resource;
 import io.opentelemetry.sdk.trace.SdkTracerProvider;
 import io.opentelemetry.sdk.trace.export.BatchSpanProcessor;
@@ -70,7 +74,16 @@ public static OpenTelemetrySdk configureGlobal(String defaultServiceName) {
     }
 
     // Configure metrics
-    var meterProviderBuilder = SdkMeterProvider.builder().setResource(resource);
+    var meterProviderBuilder =
+        SdkMeterProvider.builder()
+            .setResource(resource)
+            // Aggregate OBSERVABLE_UP_DOWN_SUM as gauge instead of sum. This allows OBSERVABLE_UP_DOWN_SUM
+            // data to still be useful when aggregation temporality is set to DELTA.
+            .registerView(
+                InstrumentSelector.builder()
+                    .setInstrumentType(InstrumentType.OBSERVABLE_UP_DOWN_SUM)
+                    .build(),
+                View.builder().setAggregation(Aggregation.lastValue()).build());
 
     var metricExporterBuilder =
         OtlpGrpcMetricExporter.builder()