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/**
* Copyright (C) 2019-present MongoDB, Inc.
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the Server Side Public License, version 1,
* as published by MongoDB, Inc.
*
* 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
* Server Side Public License for more details.
*
* You should have received a copy of the Server Side Public License
* along with this program. If not, see
* <http://www.mongodb.com/licensing/server-side-public-license>.
*
* 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 Server Side 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/db/repl/oplog_entry_or_grouped_inserts.h"
#include "mongo/bson/bsonobjbuilder.h"
namespace mongo {
namespace repl {
BSONObj OplogEntryOrGroupedInserts::toBSON() const {
if (!isGroupedInserts())
return getOp()->getEntry().toBSON();
// Since we found more than one document, create grouped insert of many docs.
// We are going to group many 'i' ops into one big 'i' op, with array fields for
// 'ts', 't', and 'o', corresponding to each individual op.
// For example:
// { ts: Timestamp(1,1), t:1, ns: "test.foo", op:"i", o: {_id:1} }
// { ts: Timestamp(1,2), t:1, ns: "test.foo", op:"i", o: {_id:2} }
// become:
// { ts: [Timestamp(1, 1), Timestamp(1, 2)],
// t: [1, 1],
// o: [{_id: 1}, {_id: 2}],
// ns: "test.foo",
// op: "i"
// }
// This BSONObj is used for error messages logging only.
BSONObjBuilder groupedInsertBuilder;
// Populate the "ts" field with an array of all the grouped inserts' timestamps.
{
BSONArrayBuilder tsArrayBuilder(groupedInsertBuilder.subarrayStart("ts"));
for (const auto& op : _entryOrGroupedInserts) {
tsArrayBuilder.append(op->getTimestamp());
}
}
// Populate the "t" (term) field with an array of all the grouped inserts' terms.
{
BSONArrayBuilder tArrayBuilder(groupedInsertBuilder.subarrayStart("t"));
for (const auto& op : _entryOrGroupedInserts) {
long long term = OpTime::kUninitializedTerm;
auto parsedTerm = op->getTerm();
if (parsedTerm)
term = parsedTerm.value();
tArrayBuilder.append(term);
}
}
// Populate the "o" field with an array of all the grouped inserts.
{
BSONArrayBuilder oArrayBuilder(groupedInsertBuilder.subarrayStart("o"));
for (const auto& op : _entryOrGroupedInserts) {
oArrayBuilder.append(op->getObject());
}
}
// Generate an op object of all elements except for "ts", "t", and "o", since we
// need to make those fields arrays of all the ts's, t's, and o's.
groupedInsertBuilder.appendElementsUnique(getOp()->getEntry().toBSON());
return groupedInsertBuilder.obj();
}
} // namespace repl
} // namespace mongo
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