First attempt

1 files changed, 17 insertions, 0 deletions

diff --git a/lib/ci/api/builds.rb b/lib/ci/api/builds.rb
index ed87a2603e8..1ec4584a13f 100644
--- a/lib/ci/api/builds.rb
+++ b/lib/ci/api/builds.rb
@@ -16,6 +16,15 @@ module Ci
           not_found! unless current_runner.active?
           update_runner_info
 
+          last_update = Gitlab::Redis.with { |redis| redis.get(current_runner_redis_key)}
+
+          if params[:last_update] != ""
+            if :last_update == last_update
+              headers 'X-GitLab-Last-Update', last_update
+              return build_not_found!
+            end
+          end
+
           build = Ci::RegisterBuildService.new.execute(current_runner)
 
           if build
@@ -26,6 +35,14 @@ module Ci
           else
             Gitlab::Metrics.add_event(:build_not_found)
 
+            if last_update == ""
+              Gitlab::Redis.with do |redis]
+                new_update = Time.new.inspect
+                redis.set(current_runner_redis_key, new_update, ex: 60.minutes)
+                headers 'X-GitLab-Last-Update', new_update
+              end
+            end
+
             build_not_found!
           end
         end