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feat(bigtable): Add support for adding tags to an Instance in InstanceConfig #16014

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feat(bigtable): Add support for adding tags to an Instance in InstanceConfig #16014

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d8e4add
Add support for adding tags to an Instance in InstanceConfig
dohun-dev Mar 2, 2026
48a782d
add AI review suggestion of support for rvalue in emplace_tag
dohun-dev Mar 3, 2026
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16 changes: 16 additions & 0 deletions google/cloud/bigtable/instance_config.h
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Original file line number Diff line number Diff line change
Expand Up @@ -67,6 +67,22 @@ class InstanceConfig {
return *this;
}

InstanceConfig& insert_tag(std::string const& key, std::string const& value) {
(*proto_.mutable_instance()->mutable_tags())[key] = value;
return *this;
}

InstanceConfig& emplace_tag(std::string const& key, std::string value) {
(*proto_.mutable_instance()->mutable_tags())[key] = std::move(value);
return *this;
}
Comment on lines +75 to +78
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@gemini-code-assist gemini-code-assist bot Mar 2, 2026

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medium

To optimize for cases where the key is an rvalue (e.g., a temporary from a string literal), consider adding an overload for emplace_tag that accepts an rvalue reference for the key. This allows moving the key into the map instead of copying it, improving efficiency.

A similar improvement could be made to emplace_label in a follow-up change for consistency.

  InstanceConfig& emplace_tag(std::string const& key, std::string value) {
    (*proto_.mutable_instance()->mutable_tags())[key] = std::move(value);
    return *this;
  }

  InstanceConfig& emplace_tag(std::string&& key, std::string value) {
    (*proto_.mutable_instance()->mutable_tags())[std::move(key)] =
        std::move(value);
    return *this;
  }

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@dohun-dev dohun-dev Mar 3, 2026

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Done


InstanceConfig& emplace_tag(std::string&& key, std::string value) {
(*proto_.mutable_instance()->mutable_tags())[std::move(key)] =
std::move(value);
return *this;
}

// NOLINT: accessors can (and should) be snake_case.
google::bigtable::admin::v2::CreateInstanceRequest const& as_proto() const& {
return proto_;
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20 changes: 20 additions & 0 deletions google/cloud/bigtable/instance_config_test.cc
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Expand Up @@ -75,6 +75,26 @@ TEST(InstanceConfigTest, SetLabels) {
EXPECT_EQ("qux", proto.instance().labels().at("baz"));
}


TEST(InstanceConfigTest, SetTags) {
InstanceConfig config("my-instance", "pretty name",
{
{"cluster-1", {"somewhere", 7, ClusterConfig::SSD}},
});

config.insert_tag("tagKeys/123", "tagValues/654").emplace_tag("tagKeys/345", "tagValues/987");

auto proto = config.as_proto();
EXPECT_EQ("my-instance", proto.instance_id());
EXPECT_EQ("pretty name", proto.instance().display_name());
ASSERT_EQ(1, proto.clusters_size());

ASSERT_EQ(2, proto.instance().tags_size());
EXPECT_EQ("tagValues/654", proto.instance().tags().at("tagKeys/123"));
EXPECT_EQ("tagValues/987", proto.instance().tags().at("tagKeys/345"));
}


} // namespace
GOOGLE_CLOUD_CPP_INLINE_NAMESPACE_END
} // namespace bigtable
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