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/**
* Copyright (C) 2022-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.
*/
#pragma once
#include "mongo/db/repl/repl_set_config.h"
namespace mongo {
namespace repl {
static ReplSetConfig makeSplitConfig(const ReplSetConfig& config,
const std::string& recipientSetName,
const std::string& recipientTagName) {
dassert(!recipientSetName.empty() && recipientSetName != config.getReplSetName());
uassert(6201800,
"We can not make a split config on an existing split config.",
!config.isSplitConfig());
const auto& tagConfig = config.getTagConfig();
std::vector<BSONObj> recipientMembers, donorMembers;
int donorIndex = 0, recipientIndex = 0;
for (const auto& member : config.members()) {
bool isRecipient =
std::any_of(member.tagsBegin(), member.tagsEnd(), [&](const ReplSetTag& tag) {
return tagConfig.getTagKey(tag) == recipientTagName;
});
if (isRecipient) {
BSONObjBuilder bob(
member.toBSON().removeField("votes").removeField("priority").removeField("_id"));
bob.appendNumber("_id", recipientIndex);
recipientMembers.push_back(bob.obj());
recipientIndex++;
} else {
BSONObjBuilder bob(member.toBSON().removeField("_id"));
bob.appendNumber("_id", donorIndex);
donorMembers.push_back(bob.obj());
donorIndex++;
}
}
uassert(6201801, "No recipient members found for split config.", !recipientMembers.empty());
uassert(6201802, "No donor members found for split config.", !donorMembers.empty());
const auto configNoMembersBson = config.toBSON().removeField("members");
BSONObjBuilder recipientConfigBob(
configNoMembersBson.removeField("_id").removeField("settings"));
recipientConfigBob.append("_id", recipientSetName).append("members", recipientMembers);
if (configNoMembersBson.hasField("settings") &&
configNoMembersBson.getField("settings").isABSONObj()) {
BSONObj settings = configNoMembersBson.getField("settings").Obj();
if (settings.hasField("replicaSetId")) {
recipientConfigBob.append("settings", settings.removeField("replicaSetId"));
}
}
BSONObjBuilder splitConfigBob(configNoMembersBson);
splitConfigBob.append("members", donorMembers);
splitConfigBob.append("recipientConfig", recipientConfigBob.obj());
return ReplSetConfig::parse(splitConfigBob.obj());
}
} // namespace repl
} // namespace mongo
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