71 lines
1.8 KiB
Ruby
71 lines
1.8 KiB
Ruby
# frozen_string_literal: true
|
|
|
|
module Gitlab
|
|
module Database
|
|
module BackgroundMigration
|
|
module HealthStatus
|
|
module Signals
|
|
# Base class for a signal
|
|
class Base
|
|
attr_reader :indicator_class, :reason
|
|
|
|
def initialize(indicator_class, reason:)
|
|
@indicator_class = indicator_class
|
|
@reason = reason
|
|
end
|
|
|
|
def to_s
|
|
"#{short_name} (indicator: #{indicator_class}; reason: #{reason})"
|
|
end
|
|
|
|
# :nocov:
|
|
def log_info?
|
|
false
|
|
end
|
|
|
|
def stop?
|
|
false
|
|
end
|
|
# :nocov:
|
|
|
|
def short_name
|
|
self.class.name.demodulize
|
|
end
|
|
end
|
|
|
|
# A Signals::Stop is an indication to put a migration on hold or stop it entirely:
|
|
# In general, we want to slow down or pause the migration.
|
|
class Stop < Base
|
|
# :nocov:
|
|
def log_info?
|
|
true
|
|
end
|
|
|
|
def stop?
|
|
true
|
|
end
|
|
# :nocov:
|
|
end
|
|
|
|
# A Signals::Normal indicates normal system state: We carry on with the migration
|
|
# and may even attempt to optimize its throughput etc.
|
|
class Normal < Base; end
|
|
|
|
# When given an Signals::Unknown, something unexpected happened while
|
|
# we evaluated system indicators.
|
|
class Unknown < Base
|
|
# :nocov:
|
|
def log_info?
|
|
true
|
|
end
|
|
# :nocov:
|
|
end
|
|
|
|
# No signal could be determined, e.g. because the indicator
|
|
# was disabled.
|
|
class NotAvailable < Base; end
|
|
end
|
|
end
|
|
end
|
|
end
|
|
end
|