Introduce "polling_interval_multiplier" as application setting

Implement module for setting "Poll-Interval" response header.
Return 429 in ETag caching middleware when polling is disabled.

1 files changed, 33 insertions, 0 deletions

diff --git a/db/migrate/20170329124448_add_polling_interval_multiplier_to_application_settings.rb b/db/migrate/20170329124448_add_polling_interval_multiplier_to_application_settings.rb
new file mode 100644
index 00000000000..a8affd19a0b
--- /dev/null
+++ b/db/migrate/20170329124448_add_polling_interval_multiplier_to_application_settings.rb
@@ -0,0 +1,33 @@
+# See http://doc.gitlab.com/ce/development/migration_style_guide.html
+# for more information on how to write migrations for GitLab.
+
+class AddPollingIntervalMultiplierToApplicationSettings < ActiveRecord::Migration
+  include Gitlab::Database::MigrationHelpers
+
+  # Set this constant to true if this migration requires downtime.
+  DOWNTIME = false
+
+  # When a migration requires downtime you **must** uncomment the following
+  # constant and define a short and easy to understand explanation as to why the
+  # migration requires downtime.
+  # DOWNTIME_REASON = ''
+
+  # When using the methods "add_concurrent_index" or "add_column_with_default"
+  # you must disable the use of transactions as these methods can not run in an
+  # existing transaction. When using "add_concurrent_index" make sure that this
+  # method is the _only_ method called in the migration, any other changes
+  # should go in a separate migration. This ensures that upon failure _only_ the
+  # index creation fails and can be retried or reverted easily.
+  #
+  # To disable transactions uncomment the following line and remove these
+  # comments:
+  disable_ddl_transaction!
+
+  def up
+    add_column_with_default :application_settings, :polling_interval_multiplier, :decimal, default: 1, allow_null: false
+  end
+
+  def down
+    remove_column :application_settings, :polling_interval_multiplier
+  end
+end