Merge branch 'sh-add-schedule-pipeline-run-now' into 'master'

Add button to run scheduled pipeline immediately

Closes #38741

See merge request gitlab-org/gitlab-ce!15700

1 files changed, 47 insertions, 0 deletions

diff --git a/lib/gitlab/action_rate_limiter.rb b/lib/gitlab/action_rate_limiter.rb
new file mode 100644
index 00000000000..4cd3bdefda3
--- /dev/null
+++ b/lib/gitlab/action_rate_limiter.rb
@@ -0,0 +1,47 @@
+module Gitlab
+  # This class implements a simple rate limiter that can be used to throttle
+  # certain actions. Unlike Rack Attack and Rack::Throttle, which operate at
+  # the middleware level, this can be used at the controller level.
+  class ActionRateLimiter
+    TIME_TO_EXPIRE = 60 # 1 min
+
+    attr_accessor :action, :expiry_time
+
+    def initialize(action:, expiry_time: TIME_TO_EXPIRE)
+      @action = action
+      @expiry_time = expiry_time
+    end
+
+    # Increments the given cache key and increments the value by 1 with the
+    # given expiration time. Returns the incremented value.
+    #
+    # key - An array of ActiveRecord instances
+    def increment(key)
+      value = 0
+
+      Gitlab::Redis::Cache.with do |redis|
+        cache_key = action_key(key)
+        value = redis.incr(cache_key)
+        redis.expire(cache_key, expiry_time) if value == 1
+      end
+
+      value
+    end
+
+    # Increments the given key and returns true if the action should
+    # be throttled.
+    #
+    # key - An array of ActiveRecord instances
+    # threshold_value - The maximum number of times this action should occur in the given time interval
+    def throttled?(key, threshold_value)
+      self.increment(key) > threshold_value
+    end
+
+    private
+
+    def action_key(key)
+      serialized = key.map { |obj| "#{obj.class.model_name.to_s.underscore}:#{obj.id}" }.join(":")
+      "action_rate_limiter:#{action}:#{serialized}"
+    end
+  end
+end