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Contents
# Copyright (C) 2015-2019 MongoDB, Inc.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
module Mongo
module Operation
# Shared behavior of operations that support read preference.
#
# @since 2.5.2
module ReadPreferenceSupported
private
SLAVE_OK = :slave_ok
def options(server)
update_options_for_slave_ok(super, server)
end
def update_selector_for_read_pref(sel, server)
if read && server.mongos? && read_pref = read.to_mongos
Mongo::Lint.validate_camel_case_read_preference(read_pref)
sel = sel[:$query] ? sel : {:$query => sel}
sel = sel.merge(:$readPreference => read_pref)
else
sel
end
end
def update_options_for_slave_ok(opts, server)
if (server.cluster.single? && !server.mongos?) || (read && read.slave_ok?)
opts.dup.tap do |o|
(o[:flags] ||= []) << SLAVE_OK
end
else
opts
end
end
def command(server)
sel = super
update_selector_for_read_pref(sel, server)
end
end
end
end
Version data entries
29 entries across 29 versions & 2 rubygems