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|
# frozen_string_literal: true
# rubocop:todo all
# Copyright (C) 2015-2020 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.
require 'mongo/error'
module Mongo
module Operation
# Shared executable behavior of operations.
#
# @since 2.5.2
# @api private
module Executable
include ResponseHandling
# @return [ Operation::Context | nil ] the operation context used to
# execute this operation.
attr_accessor :context
def do_execute(connection, context, options = {})
# Save the context on the instance, to avoid having to pass it as a
# parameter to every single method. There are many legacy methods that
# still accept it as a parameter, which are left as-is for now to
# minimize the impact of this change. Moving forward, it may be
# reasonable to refactor things so this saved reference is used instead.
@context = context
session&.materialize_if_needed
unpin_maybe(session, connection) do
add_error_labels(connection, context) do
check_for_network_error do
add_server_diagnostics(connection) do
get_result(connection, context, options).tap do |result|
if session
if session.in_transaction? &&
connection.description.load_balancer?
then
if session.pinned_connection_global_id
unless session.pinned_connection_global_id == connection.global_id
raise(
Error::InternalDriverError,
"Expected operation to use connection #{session.pinned_connection_global_id} but it used #{connection.global_id}"
)
end
else
session.pin_to_connection(connection.global_id)
connection.pin
end
end
if session.snapshot? && !session.snapshot_timestamp
session.snapshot_timestamp = result.snapshot_timestamp
end
end
if result.has_cursor_id? &&
connection.description.load_balancer?
then
if result.cursor_id == 0
connection.unpin
else
connection.pin
end
end
process_result(result, connection)
end
end
end
end
end
end
def execute(connection, context:, options: {})
if Lint.enabled?
unless connection.is_a?(Mongo::Server::Connection)
raise Error::LintError, "Connection argument is of wrong type: #{connection}"
end
end
do_execute(connection, context, options).tap do |result|
validate_result(result, connection, context)
end
end
private
def result_class
Result
end
def get_result(connection, context, options = {})
result_class.new(*dispatch_message(connection, context, options), context: context, connection: connection)
end
# Returns a Protocol::Message or nil as reply.
def dispatch_message(connection, context, options = {})
message = build_message(connection, context)
message = message.maybe_encrypt(connection, context)
reply = connection.dispatch([ message ], context, options)
[reply, connection.description, connection.global_id]
end
# @param [ Mongo::Server::Connection ] connection The connection on which
# the operation is performed.
# @param [ Mongo::Operation::Context ] context The operation context.
def build_message(connection, context)
msg = message(connection)
if server_api = context.server_api
msg = msg.maybe_add_server_api(server_api)
end
msg
end
def process_result(result, connection)
connection.server.update_cluster_time(result)
process_result_for_sdam(result, connection)
if session
session.process(result)
end
result
end
def process_result_for_sdam(result, connection)
if (result.not_master? || result.node_recovering?) &&
connection.generation >= connection.server.pool.generation(service_id: connection.service_id)
then
if result.node_shutting_down?
keep_pool = false
else
# Max wire version needs to be examined while the server is known
keep_pool = connection.description.server_version_gte?('4.2')
end
connection.server.unknown!(
keep_connection_pool: keep_pool,
generation: connection.generation,
service_id: connection.service_id,
topology_version: result.topology_version,
)
connection.server.scan_semaphore.signal
end
end
NETWORK_ERRORS = [
Error::SocketError,
Error::SocketTimeoutError
].freeze
def check_for_network_error
yield
rescue *NETWORK_ERRORS
session&.dirty!
raise
end
end
end
end
|
