1 files changed, 6 insertions, 1 deletions
diff --git a/application-model/src/main/java/com/yahoo/vespa/applicationmodel/ApplicationInstanceReference.java b/application-model/src/main/java/com/yahoo/vespa/applicationmodel/ApplicationInstanceReference.java
index e761e14caa4..f0b2c46d460 100644
--- a/application-model/src/main/java/com/yahoo/vespa/applicationmodel/ApplicationInstanceReference.java
+++ b/application-model/src/main/java/com/yahoo/vespa/applicationmodel/ApplicationInstanceReference.java
@@ -10,7 +10,7 @@ import java.util.Objects;
  * @author bjorncs
  */
 // TODO: Remove this and use ApplicationId instead (if you need it for the JSON stuff move it to that layer and don't let it leak)
-public class ApplicationInstanceReference {
+public class ApplicationInstanceReference implements Comparable<ApplicationInstanceReference> {
 
     private final TenantId tenantId;
     private final ApplicationInstanceId applicationInstanceId;
@@ -43,6 +43,11 @@ public class ApplicationInstanceReference {
     }
 
     @Override
+    public int compareTo(ApplicationInstanceReference o) {
+        return this.asString().compareTo(o.asString());
+    }
+
+    @Override
     public boolean equals(Object o) {
         if (this == o) return true;
         if (o == null || getClass() != o.getClass()) return false;