add readme

open-telemetry · Feb 8, 2022 · 265ce99 · 265ce99
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diff --git a/instrumentation/micrometer/micrometer-1.5/README.md b/instrumentation/micrometer/micrometer-1.5/README.md
@@ -0,0 +1,5 @@
+# Settings for the Micrometer bridge instrumentation
+
+| System property | Type | Default | Description |
+|---|---|---|---|
+| `otel.instrumentation.micrometer.base-time-unit` | String | `ms` | Set the base time unit for the OpenTelemetry `MeterRegistry` implementation. <details><summary>Valid values</summary>`ns`, `nanoseconds`, `us`, `microseconds`, `ms`, `microseconds`, `s`, `seconds`, `min`, `minutes`, `h`, `hours`, `d`, `days`</details> |
diff --git a/...ibrary/src/main/java/io/opentelemetry/instrumentation/micrometer/v1_5/TimeUnitHelper.java b/...ibrary/src/main/java/io/opentelemetry/instrumentation/micrometer/v1_5/TimeUnitHelper.java
@@ -5,6 +5,7 @@
 
 package io.opentelemetry.instrumentation.micrometer.v1_5;
 
+import java.util.Locale;
 import java.util.concurrent.TimeUnit;
 import javax.annotation.Nullable;
 import org.slf4j.Logger;
@@ -18,7 +19,9 @@ static TimeUnit parseConfigValue(@Nullable String value) {
     if (value == null) {
       return TimeUnit.MILLISECONDS;
     }
-    switch (value) {
+    // short names are UCUM names
+    // long names are just TimeUnit values lowercased
+    switch (value.toLowerCase(Locale.ROOT)) {
       case "ns":
       case "nanoseconds":
         return TimeUnit.NANOSECONDS;