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# frozen_string_literal: true
module Gitlab
module Database
module Reindexing
class Coordinator
include ExclusiveLeaseGuard
# Maximum lease time for the global Redis lease
# This should be higher than the maximum time for any
# long running step in the reindexing process (compare with
# statement timeouts).
TIMEOUT_PER_ACTION = 1.day
attr_reader :index, :notifier
def initialize(index, notifier = GrafanaNotifier.new)
@index = index
@notifier = notifier
end
def perform
# This obtains a global lease such that there's
# only one live reindexing process at a time.
try_obtain_lease do
action = ReindexAction.create_for(index)
with_notifications(action) do
perform_for(index, action)
end
end
end
private
def with_notifications(action)
notifier.notify_start(action)
yield
ensure
notifier.notify_end(action)
end
def perform_for(index, action)
ReindexConcurrently.new(index).perform
rescue StandardError
action.state = :failed
raise
ensure
action.finish
end
def lease_timeout
TIMEOUT_PER_ACTION
end
end
end
end
end
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