enable auto-configuring the logging metrics exporter (#2580)

* enable auto-configuring the logging metrics exporter

* fix the class name for the metrics exporter

* extract a method for configuring the IMR

sdk-extensions/autoconfigure/src/main/java/io/opentelemetry/sdk/autoconfigure/MetricExporterConfiguration.java

@@ -5,12 +5,14 @@
 
 package io.opentelemetry.sdk.autoconfigure;
 
+import io.opentelemetry.exporter.logging.LoggingMetricExporter;
 import io.opentelemetry.exporter.otlp.metrics.OtlpGrpcMetricExporter;
 import io.opentelemetry.exporter.otlp.metrics.OtlpGrpcMetricExporterBuilder;
 import io.opentelemetry.exporter.prometheus.PrometheusCollector;
 import io.opentelemetry.sdk.metrics.SdkMeterProvider;
 import io.opentelemetry.sdk.metrics.export.IntervalMetricReader;
 import io.opentelemetry.sdk.metrics.export.IntervalMetricReaderBuilder;
+import io.opentelemetry.sdk.metrics.export.MetricExporter;
 import io.prometheus.client.exporter.HTTPServer;
 import java.io.IOException;
 import java.time.Duration;
@@ -28,11 +30,24 @@ final class MetricExporterConfiguration {
       case "prometheus":
         configurePrometheusMetrics(config, meterProvider);
         return;
+      case "logging":
+        ClasspathUtil.checkClassExists(
+            "io.opentelemetry.exporter.logging.LoggingMetricExporter",
+            "Logging Metrics Exporter",
+            "opentelemetry-exporter-logging");
+        configureLoggingMetrics(config, meterProvider);
+        return;
       default:
         return;
     }
   }
 
+  private static void configureLoggingMetrics(
+      ConfigProperties config, SdkMeterProvider meterProvider) {
+    MetricExporter exporter = new LoggingMetricExporter();
+    configureIntervalMetricReader(config, meterProvider, exporter);
+  }
+
   // Visible for testing
   static OtlpGrpcMetricExporter configureOtlpMetrics(
       ConfigProperties config, SdkMeterProvider meterProvider) {
@@ -56,6 +71,13 @@ final class MetricExporterConfiguration {
 
     OtlpGrpcMetricExporter exporter = builder.build();
 
+    configureIntervalMetricReader(config, meterProvider, exporter);
+
+    return exporter;
+  }
+
+  private static void configureIntervalMetricReader(
+      ConfigProperties config, SdkMeterProvider meterProvider, MetricExporter exporter) {
     IntervalMetricReaderBuilder readerBuilder =
         IntervalMetricReader.builder()
             .setMetricProducers(Collections.singleton(meterProvider))
@@ -66,8 +88,6 @@ final class MetricExporterConfiguration {
     }
     IntervalMetricReader reader = readerBuilder.build();
     Runtime.getRuntime().addShutdownHook(new Thread(reader::shutdown));
-
-    return exporter;
   }
 
   private static void configurePrometheusMetrics(

sdk-extensions/autoconfigure/src/test/java/io/opentelemetry/sdk/autoconfigure/NotOnClasspathTest.java

@@ -51,6 +51,18 @@ class NotOnClasspathTest {
                 + "classpath");
   }
 
+  @Test
+  void logging_metrics() {
+    assertThatThrownBy(
+            () ->
+                MetricExporterConfiguration.configureExporter(
+                    "logging", EMPTY, SdkMeterProvider.builder().build()))
+        .isInstanceOf(ConfigurationException.class)
+        .hasMessageContaining(
+            "Logging Metrics Exporter enabled but opentelemetry-exporter-logging not found on "
+                + "classpath");
+  }
+
   @Test
   void otlpMetrics() {
     assertThatThrownBy(