From 703028fcb0de1b232b68b2581508f98f53c5d1b7 Mon Sep 17 00:00:00 2001
From: Tobias Stadler <ts.stadler@gmx.de>
Date: Mon, 13 Sep 2021 18:41:28 +0200
Subject: [PATCH] Added support for setting tracer tags via the configuration
 (#284)

Signed-off-by: Tobias Stadler <ts.stadler@gmx.de>

Co-authored-by: Yuri Shkuro <yurishkuro@users.noreply.github.com>
---
 src/jaegertracing/Config.h       |  9 ++++++++-
 src/jaegertracing/ConfigTest.cpp | 15 +++++++++++++++
 2 files changed, 23 insertions(+), 1 deletion(-)

diff --git a/src/jaegertracing/Config.h b/src/jaegertracing/Config.h
index 1c8a997..90696d1 100644
--- a/src/jaegertracing/Config.h
+++ b/src/jaegertracing/Config.h
@@ -68,6 +68,13 @@ class Config {
         const auto baggageRestrictionsNode = configYAML["baggage_restrictions"];
         const auto baggageRestrictions =
             baggage::RestrictionsConfig::parse(baggageRestrictionsNode);
+
+        std::vector<Tag> tags;
+        const auto node = configYAML["tags"];
+        for(YAML::const_iterator it = node.begin(); it != node.end(); ++it) {
+            tags.emplace_back(it->first.as<std::string>(), it->second.as<std::string>());
+        }
+
         return Config(disabled,
                       traceId128Bit,
                       sampler,
@@ -75,7 +82,7 @@ class Config {
                       headers,
                       baggageRestrictions,
                       serviceName,
-                      std::vector<Tag>(),
+                      tags,
                       propagationFormat);
     }
 
diff --git a/src/jaegertracing/ConfigTest.cpp b/src/jaegertracing/ConfigTest.cpp
index 15e91d2..f0e3326 100644
--- a/src/jaegertracing/ConfigTest.cpp
+++ b/src/jaegertracing/ConfigTest.cpp
@@ -107,6 +107,21 @@ propagation_format: w3c
     }
 }
 
+TEST(Config, testTags)
+{
+    {
+        constexpr auto kConfigYAML = R"cfg(
+tags:
+  foo: bar
+)cfg";
+        const auto config = Config::parse(YAML::Load(kConfigYAML));
+
+        std::vector<Tag> expectedTags;
+        expectedTags.emplace_back("foo", std::string("bar"));
+        ASSERT_EQ(expectedTags, config.tags());
+    }
+}
+
 #endif  // JAEGERTRACING_WITH_YAML_CPP
 
 TEST(Config, testFromEnv)