Use oneof in DogStatsdSink

taiki45 · taiki45 · commit 3c8e69413e4a · 2017-12-06T08:04:28.000+09:00
For future extensibility.

Signed-off-by: Taiki Ono &lt;taiks.4559@gmail.com&gt;
diff --git a/api/stats.proto b/api/stats.proto
@@ -144,7 +144,15 @@ message StatsdSink {
 // The sink emits stats with `DogStatsD <https://docs.datadoghq.com/guides/dogstatsd/>`_
 // compatible tags. Tags are configurable via :ref:`StatsConfig <envoy_api_msg_StatsConfig>`.
 message DogStatsdSink {
-  // The UDP address of a running DogStatsD compliant listener. If specified,
-  // statistics will be flushed to this address.
-  Address address = 1 [(validate.rules).message.required = true];
+  oneof dog_statsd_specifier {
+    option (validate.required) = true;
+
+    // The UDP address of a running DogStatsD compliant listener. If specified,
+    // statistics will be flushed to this address.
+    Address address = 1;
+
+    // The name of a cluster that is DogStatsD compliant TCP listener. If specified,
+    // Envoy will connect to this cluster to flush statistics.
+    string tcp_cluster_name = 2;
+  }
 }
