Add custom tags to MicrometerCapability (#2305)

* #1456 | Add custom tags to MicrometerCapability

* Update MicrometerCapability.java license year

---------

Co-authored-by: Marvin <[email protected]>

Author: BartekBanachowicz

micrometer/src/main/java/feign/micrometer/MicrometerCapability.java

@@ -1,5 +1,5 @@
 /*
- * Copyright 2012-2023 The Feign Authors
+ * Copyright 2012-2024 The Feign Authors
  *
  * Licensed under the Apache License, Version 2.0 (the "License"); you may not use this file except
  * in compliance with the License. You may obtain a copy of the License at
@@ -22,9 +22,14 @@
 import io.micrometer.core.instrument.Clock;
 import io.micrometer.core.instrument.MeterRegistry;
 import io.micrometer.core.instrument.Metrics;
+import io.micrometer.core.instrument.Tag;
 import io.micrometer.core.instrument.simple.SimpleConfig;
 import io.micrometer.core.instrument.simple.SimpleMeterRegistry;
 
+import java.util.List;
+import java.util.Map;
+import java.util.stream.Collectors;
+
 public class MicrometerCapability implements Capability {
 
   private final MeterRegistry meterRegistry;
@@ -38,6 +43,17 @@ public MicrometerCapability(MeterRegistry meterRegistry) {
     this.meterRegistry = meterRegistry;
   }
 
+  public MicrometerCapability(MeterRegistry meterRegistry, List<Tag> tagsList) {
+    meterRegistry.config().commonTags(tagsList);
+    this.meterRegistry = meterRegistry;
+  }
+
+  public MicrometerCapability(MeterRegistry meterRegistry, Map<String, String> tagsMap) {
+    List<Tag> tagsList = mapTags(tagsMap);
+    meterRegistry.config().commonTags(tagsList);
+    this.meterRegistry = meterRegistry;
+  }
+
   @Override
   public Client enrich(Client client) {
     return new MeteredClient(client, meterRegistry);
@@ -62,4 +78,10 @@ public Decoder enrich(Decoder decoder) {
   public InvocationHandlerFactory enrich(InvocationHandlerFactory invocationHandlerFactory) {
     return new MeteredInvocationHandleFactory(invocationHandlerFactory, meterRegistry);
   }
+
+  private List<Tag> mapTags(Map<String, String> tags) {
+    return tags.keySet().stream()
+            .map(tagKey -> Tag.of(tagKey, tags.get(tagKey)))
+            .collect(Collectors.toList());
+  }
 }