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# Copyright (C) 2015-2017 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
class BulkWrite
# Combines bulk write results together.
#
# @api private
#
# @since 2.1.0
class ResultCombiner
# @return [ Integer ] count The count of documents in the entire batch.
attr_reader :count
# @return [ Hash ] results The results hash.
attr_reader :results
# Create the new result combiner.
#
# @api private
#
# @example Create the result combiner.
# ResultCombiner.new
#
# @since 2.1.0
def initialize
@results = {}
@count = 0
end
# Combines a result into the overall results.
#
# @api private
#
# @example Combine the result.
# combiner.combine!(result, count)
#
# @param [ Operation::Result ] result The result to combine.
# @param [ Integer ] count The count of requests in the batch.
#
# @since 2.1.0
def combine!(result, count)
combine_counts!(result)
combine_ids!(result)
combine_errors!(result)
@count += count
end
# Get the final result.
#
# @api private
#
# @example Get the final result.
# combinator.result
#
# @return [ BulkWrite::Result ] The final result.
#
# @since 2.1.0
def result
BulkWrite::Result.new(results).validate!
end
private
def combine_counts!(result)
Result::FIELDS.each do |field|
if result.respond_to?(field) && value = result.send(field)
results.merge!(field => (results[field] || 0) + value)
end
end
end
def combine_ids!(result)
if result.respond_to?(Result::INSERTED_IDS)
results[Result::INSERTED_IDS] = (results[Result::INSERTED_IDS] || []) +
result.inserted_ids
end
if result.respond_to?(Result::UPSERTED)
results[Result::UPSERTED_IDS] = (results[Result::UPSERTED_IDS] || []) +
result.upserted.map{ |doc| doc['_id'] }
end
end
def combine_errors!(result)
combine_write_errors!(result)
combine_write_concern_errors!(result)
end
def combine_write_errors!(result)
if write_errors = result.aggregate_write_errors(count)
results.merge!(
Error::WRITE_ERRORS => ((results[Error::WRITE_ERRORS] || []) << write_errors).flatten
)
else
result.validate!
end
end
def combine_write_concern_errors!(result)
if write_concern_errors = result.aggregate_write_concern_errors(count)
results[Error::WRITE_CONCERN_ERRORS] = (results[Error::WRITE_CONCERN_ERRORS] || []) +
write_concern_errors
end
end
end
end
end
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