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module Snapsync
# Exception thrown when performing sanity checks on the values returned by
# the policy. Snapsync usually aborts in these cases, given how this is
# critical
class InvalidPolicy < RuntimeError; end
# Default synchronization policy
#
# Synchronization policy objects are used by the synchronization passes to
# decide which snapshots to copy and which to not copy. They have to provide
# {#filter_snapshots}.
#
# This default policy is to copy everything but the snapsync-created
# synchronization points that are not involving the current target
class DefaultSyncPolicy
def self.from_config(config)
new
end
def to_config
Array.new
end
# Returns the snapshots that should be synchronized according to this
# policy
#
# @param [#uuid] target the target object
# @param [Array<Snapshot>] the snapshot candidates
# @return [Array<Snapshot>] the snapshots that should be copied
def filter_snapshots(snapshots)
# Filter out any snapsync-generated snapshot
snapshots.find_all { |s| !s.synchronization_point? }
end
# Pretty prints this policy
#
# This is used by the CLI to give information about a target to the user
def pretty_print(pp)
pp.text "default policy"
end
end
end
Version data entries
18 entries across 18 versions & 1 rubygems