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/**
* Copyright (C) 2017 MongoDB Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU Affero General Public License, version 3,
* as published by the Free Software Foundation.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU Affero General Public License for more details.
*
* You should have received a copy of the GNU Affero General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
* As a special exception, the copyright holders give permission to link the
* code of portions of this program with the OpenSSL library under certain
* conditions as described in each individual source file and distribute
* linked combinations including the program with the OpenSSL library. You
* must comply with the GNU Affero General Public License in all respects
* for all of the code used other than as permitted herein. If you modify
* file(s) with this exception, you may extend this exception to your
* version of the file(s), but you are not obligated to do so. If you do not
* wish to do so, delete this exception statement from your version. If you
* delete this exception statement from all source files in the program,
* then also delete it in the license file.
*/
#include "mongo/platform/basic.h"
#include "mongo/s/query/router_stage_aggregation_merge.h"
#include "mongo/db/pipeline/document_source_merge_cursors.h"
#include "mongo/db/pipeline/expression_context.h"
namespace mongo {
RouterStageAggregationMerge::RouterStageAggregationMerge(
std::unique_ptr<Pipeline, Pipeline::Deleter> mergePipeline)
: _mergePipeline(std::move(mergePipeline)) {}
StatusWith<ClusterQueryResult> RouterStageAggregationMerge::next() {
// Pipeline::getNext will return a boost::optional<Document> or boost::none if EOF.
if (auto result = _mergePipeline->getNext()) {
return {result->toBson()};
}
// If we reach this point, we have hit EOF.
_mergePipeline.get_deleter().dismissDisposal();
_mergePipeline->dispose(getOpCtx());
return {ClusterQueryResult()};
}
void RouterStageAggregationMerge::doReattachToOperationContext() {
_mergePipeline->reattachToOperationContext(getOpCtx());
}
void RouterStageAggregationMerge::doDetachFromOperationContext() {
_mergePipeline->detachFromOperationContext();
}
void RouterStageAggregationMerge::kill(OperationContext* opCtx) {
_mergePipeline.get_deleter().dismissDisposal();
_mergePipeline->dispose(opCtx);
}
bool RouterStageAggregationMerge::remotesExhausted() {
const auto mergeSource =
static_cast<DocumentSourceMergeCursors*>(_mergePipeline->getSources().front().get());
return mergeSource->remotesExhausted();
}
Status RouterStageAggregationMerge::setAwaitDataTimeout(Milliseconds awaitDataTimeout) {
return {ErrorCodes::InvalidOptions, "maxTimeMS is not valid for aggregation getMore"};
}
} // namespace mongo
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