Avoid conflicts in Micrometer description mapping (#5452)

* Avoid conflicts in Micrometer description mapping

Signed-off-by: Fabian Stäber <fabian@fstab.de>

* fix formatting

* Update instrumentation/micrometer/micrometer-1.5/library/src/main/java/io/opentelemetry/instrumentation/micrometer/v1_5/Bridging.java

Co-authored-by: Mateusz Rzeszutek <mrzeszutek@splunk.com>

Co-authored-by: Mateusz Rzeszutek <mrzeszutek@splunk.com>

instrumentation/micrometer/micrometer-1.5/library/src/main/java/io/opentelemetry/instrumentation/micrometer/v1_5/Bridging.java

@@ -17,6 +17,7 @@ import io.opentelemetry.instrumentation.api.cache.Cache;
 final class Bridging {
 
   private static final Cache<String, AttributeKey<String>> tagsCache = Cache.bounded(1024);
+  private static final Cache<String, String> descriptionsCache = Cache.bounded(1024);
 
   static Attributes tagsAsAttributes(Meter.Id id, NamingConvention namingConvention) {
     Iterable<Tag> tags = id.getTagsAsIterable();
@@ -36,9 +37,14 @@ final class Bridging {
     return namingConvention.name(id.getName(), id.getType(), id.getBaseUnit());
   }
 
-  static String description(Meter.Id id) {
+  // TODO: remove the cache usage once the SDK is able to handle different descriptions
-    String description = id.getDescription();
+  static String description(String name, Meter.Id id) {
-    return description == null ? "" : description;
+    return descriptionsCache.computeIfAbsent(
+        name,
+        n -> {
+          String description = id.getDescription();
+          return description == null ? "" : description;
+        });
   }
 
   static String baseUnit(Meter.Id id) {

instrumentation/micrometer/micrometer-1.5/library/src/main/java/io/opentelemetry/instrumentation/micrometer/v1_5/OpenTelemetryCounter.java

@@ -34,10 +34,11 @@ final class OpenTelemetryCounter implements Counter, RemovableMeter {
     this.id = id;
 
     this.attributes = tagsAsAttributes(id, namingConvention);
+    String conventionName = name(id, namingConvention);
     this.otelCounter =
         otelMeter
-            .counterBuilder(name(id, namingConvention))
+            .counterBuilder(conventionName)
-            .setDescription(description(id))
+            .setDescription(description(conventionName, id))
             .setUnit(baseUnit(id))
             .ofDoubles()
             .build();

instrumentation/micrometer/micrometer-1.5/library/src/main/java/io/opentelemetry/instrumentation/micrometer/v1_5/OpenTelemetryDistributionSummary.java

@@ -62,13 +62,13 @@ final class OpenTelemetryDistributionSummary extends AbstractDistributionSummary
     this.otelHistogram =
         otelMeter
             .histogramBuilder(conventionName)
-            .setDescription(description(id))
+            .setDescription(description(conventionName, id))
             .setUnit(baseUnit(id))
             .build();
     this.maxHandle =
         asyncInstrumentRegistry.buildGauge(
             conventionName + ".max",
-            description(id),
+            description(conventionName, id),
             baseUnit(id),
             attributes,
             max,

instrumentation/micrometer/micrometer-1.5/library/src/main/java/io/opentelemetry/instrumentation/micrometer/v1_5/OpenTelemetryFunctionCounter.java

@@ -34,10 +34,11 @@ final class OpenTelemetryFunctionCounter<T> implements FunctionCounter, Removabl
       AsyncInstrumentRegistry asyncInstrumentRegistry) {
     this.id = id;
 
+    String conventionName = name(id, namingConvention);
     countMeasurementHandle =
         asyncInstrumentRegistry.buildDoubleCounter(
-            name(id, namingConvention),
+            conventionName,
-            description(id),
+            description(conventionName, id),
             baseUnit(id),
             tagsAsAttributes(id, namingConvention),
             obj,

instrumentation/micrometer/micrometer-1.5/library/src/main/java/io/opentelemetry/instrumentation/micrometer/v1_5/OpenTelemetryFunctionTimer.java

@@ -45,18 +45,22 @@ final class OpenTelemetryFunctionTimer<T> implements FunctionTimer, RemovableMet
     this.id = id;
     this.baseTimeUnit = baseTimeUnit;
 
-    String countMeterName = name(id, namingConvention) + ".count";
+    String conventionName = name(id, namingConvention);
-    String totalTimeMeterName = name(id, namingConvention) + ".sum";
     Attributes attributes = tagsAsAttributes(id, namingConvention);
 
     countMeasurementHandle =
         asyncInstrumentRegistry.buildLongCounter(
-            countMeterName, description(id), /* baseUnit = */ "1", attributes, obj, countFunction);
+            conventionName + ".count",
+            description(conventionName, id),
+            /* baseUnit = */ "1",
+            attributes,
+            obj,
+            countFunction);
 
     totalTimeMeasurementHandle =
         asyncInstrumentRegistry.buildDoubleCounter(
-            totalTimeMeterName,
+            conventionName + ".sum",
-            description(id),
+            description(conventionName, id),
             getUnitString(baseTimeUnit),
             attributes,
             obj,

instrumentation/micrometer/micrometer-1.5/library/src/main/java/io/opentelemetry/instrumentation/micrometer/v1_5/OpenTelemetryGauge.java

@@ -35,10 +35,11 @@ final class OpenTelemetryGauge<T> implements Gauge, RemovableMeter {
 
     this.id = id;
 
+    String conventionName = name(id, namingConvention);
     gaugeMeasurementHandle =
         asyncInstrumentRegistry.buildGauge(
-            name(id, namingConvention),
+            conventionName,
-            description(id),
+            description(conventionName, id),
             baseUnit(id),
             tagsAsAttributes(id, namingConvention),
             obj,

instrumentation/micrometer/micrometer-1.5/library/src/main/java/io/opentelemetry/instrumentation/micrometer/v1_5/OpenTelemetryLongTaskTimer.java

@@ -43,7 +43,7 @@ final class OpenTelemetryLongTaskTimer extends DefaultLongTaskTimer implements R
     this.activeTasksHandle =
         asyncInstrumentRegistry.buildUpDownLongCounter(
             conventionName + ".active",
-            description(id),
+            description(conventionName, id),
             "tasks",
             attributes,
             this,
@@ -51,7 +51,7 @@ final class OpenTelemetryLongTaskTimer extends DefaultLongTaskTimer implements R
     this.durationHandle =
         asyncInstrumentRegistry.buildUpDownDoubleCounter(
             conventionName + ".duration",
-            description(id),
+            description(conventionName, id),
             getUnitString(baseTimeUnit),
             attributes,
             this,

instrumentation/micrometer/micrometer-1.5/library/src/main/java/io/opentelemetry/instrumentation/micrometer/v1_5/OpenTelemetryMeter.java

@@ -39,7 +39,7 @@ final class OpenTelemetryMeter implements Meter, RemovableMeter {
     List<AsyncMeasurementHandle> measurementHandles = new ArrayList<>();
     for (Measurement measurement : measurements) {
       String name = statisticInstrumentName(id, measurement.getStatistic(), namingConvention);
-      String description = description(id);
+      String description = description(name, id);
       String baseUnit = baseUnit(id);
 
       switch (measurement.getStatistic()) {

instrumentation/micrometer/micrometer-1.5/library/src/main/java/io/opentelemetry/instrumentation/micrometer/v1_5/OpenTelemetryTimer.java

@@ -65,13 +65,13 @@ final class OpenTelemetryTimer extends AbstractTimer implements RemovableMeter {
     this.otelHistogram =
         otelMeter
             .histogramBuilder(conventionName)
-            .setDescription(description(id))
+            .setDescription(description(conventionName, id))
             .setUnit(getUnitString(baseTimeUnit))
             .build();
     this.maxHandle =
         asyncInstrumentRegistry.buildGauge(
             conventionName + ".max",
-            description(id),
+            description(conventionName, id),
             getUnitString(baseTimeUnit),
             attributes,
             max,