diff options
Diffstat (limited to 'lib/gitlab/database/consistency.rb')
-rw-r--r-- | lib/gitlab/database/consistency.rb | 31 |
1 files changed, 31 insertions, 0 deletions
diff --git a/lib/gitlab/database/consistency.rb b/lib/gitlab/database/consistency.rb new file mode 100644 index 00000000000..b7d06a26ddb --- /dev/null +++ b/lib/gitlab/database/consistency.rb @@ -0,0 +1,31 @@ +# frozen_string_literal: true + +module Gitlab + module Database + ## + # This class is used to make it possible to ensure read consistency in + # GitLab EE without the need of overriding a lot of methods / classes / + # classs. + # + # This is a CE class that does nothing in CE, because database load + # balancing is EE-only feature, but you can still use it in CE. It will + # start ensuring read consistency once it is overridden in EE. + # + # Using this class in CE helps to avoid creeping discrepancy between CE / + # EE only to force usage of the primary database in EE. + # + class Consistency + ## + # In CE there is no database load balancing, so all reads are expected to + # be consistent by the ACID guarantees of a single PostgreSQL instance. + # + # This method is overridden in EE. + # + def self.with_read_consistency(&block) + yield + end + end + end +end + +::Gitlab::Database::Consistency.singleton_class.prepend_if_ee('EE::Gitlab::Database::Consistency') |