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/**
* Copyright (C) 2015 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/rpc/metadata/repl_set_metadata.h"
#include "mongo/bson/util/bson_check.h"
#include "mongo/bson/util/bson_extract.h"
#include "mongo/db/jsobj.h"
#include "mongo/rpc/metadata.h"
namespace mongo {
namespace rpc {
using repl::OpTime;
const char kReplSetMetadataFieldName[] = "$replData";
namespace {
const char kLastOpCommittedFieldName[] = "lastOpCommitted";
const char kLastOpVisibleFieldName[] = "lastOpVisible";
const char kConfigVersionFieldName[] = "configVersion";
const char kPrimaryIndexFieldName[] = "primaryIndex";
const char kSyncSourceIndexFieldName[] = "syncSourceIndex";
const char kTermFieldName[] = "term";
} // unnamed namespace
#ifndef _MSC_EXTENSIONS
const int ReplSetMetadata::kNoPrimary;
#endif // _MSC_EXTENSIONS
ReplSetMetadata::ReplSetMetadata(long long term,
OpTime committedOpTime,
OpTime visibleOpTime,
long long configVersion,
int currentPrimaryIndex,
int currentSyncSourceIndex)
: _lastOpCommitted(std::move(committedOpTime)),
_lastOpVisible(std::move(visibleOpTime)),
_currentTerm(term),
_configVersion(configVersion),
_currentPrimaryIndex(currentPrimaryIndex),
_currentSyncSourceIndex(currentSyncSourceIndex) {}
StatusWith<ReplSetMetadata> ReplSetMetadata::readFromMetadata(const BSONObj& metadataObj) {
BSONElement replMetadataElement;
Status status = bsonExtractTypedField(
metadataObj, rpc::kReplSetMetadataFieldName, Object, &replMetadataElement);
if (!status.isOK())
return status;
BSONObj replMetadataObj = replMetadataElement.Obj();
long long configVersion;
status = bsonExtractIntegerField(replMetadataObj, kConfigVersionFieldName, &configVersion);
if (!status.isOK())
return status;
long long primaryIndex;
status = bsonExtractIntegerField(replMetadataObj, kPrimaryIndexFieldName, &primaryIndex);
if (!status.isOK())
return status;
long long syncSourceIndex;
status = bsonExtractIntegerField(replMetadataObj, kSyncSourceIndexFieldName, &syncSourceIndex);
if (!status.isOK())
return status;
long long term;
status = bsonExtractIntegerField(replMetadataObj, kTermFieldName, &term);
if (!status.isOK())
return status;
repl::OpTime lastOpCommitted;
status = bsonExtractOpTimeField(replMetadataObj, kLastOpCommittedFieldName, &lastOpCommitted);
if (!status.isOK())
return status;
repl::OpTime lastOpVisible;
status = bsonExtractOpTimeField(replMetadataObj, kLastOpVisibleFieldName, &lastOpVisible);
if (!status.isOK())
return status;
return ReplSetMetadata(
term, lastOpCommitted, lastOpVisible, configVersion, primaryIndex, syncSourceIndex);
}
Status ReplSetMetadata::writeToMetadata(BSONObjBuilder* builder) const {
BSONObjBuilder replMetadataBuilder(builder->subobjStart(kReplSetMetadataFieldName));
replMetadataBuilder.append(kTermFieldName, _currentTerm);
_lastOpCommitted.append(&replMetadataBuilder, kLastOpCommittedFieldName);
_lastOpVisible.append(&replMetadataBuilder, kLastOpVisibleFieldName);
replMetadataBuilder.append(kConfigVersionFieldName, _configVersion);
replMetadataBuilder.append(kPrimaryIndexFieldName, _currentPrimaryIndex);
replMetadataBuilder.append(kSyncSourceIndexFieldName, _currentSyncSourceIndex);
replMetadataBuilder.doneFast();
return Status::OK();
}
} // namespace rpc
} // namespace mongo
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