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/**
* Copyright (C) 2018-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/util/fail_point_registry.h"
#include "mongo/bson/json.h"
#include "mongo/util/fail_point_server_parameter_gen.h"
#include "mongo/util/fail_point_service.h"
#include "mongo/util/map_util.h"
#include "mongo/util/mongoutils/str.h"
namespace mongo {
constexpr auto kFailPointServerParameterPrefix = "failpoint."_sd;
FailPointRegistry::FailPointRegistry() : _frozen(false) {}
Status FailPointRegistry::addFailPoint(const std::string& name, FailPoint* failPoint) {
if (_frozen) {
return {ErrorCodes::CannotMutateObject, "Registry is already frozen"};
}
if (_fpMap.count(name) > 0) {
return {ErrorCodes::Error(51006),
str::stream() << "Fail point already registered: " << name};
}
_fpMap.insert(make_pair(name, failPoint));
return Status::OK();
}
FailPoint* FailPointRegistry::getFailPoint(const std::string& name) const {
return mapFindWithDefault(_fpMap, name, static_cast<FailPoint*>(nullptr));
}
void FailPointRegistry::freeze() {
_frozen = true;
}
void FailPointRegistry::registerAllFailPointsAsServerParameters() {
for (const auto& it : _fpMap) {
// Intentionally leaked.
new FailPointServerParameter(it.first, ServerParameterType::kStartupOnly);
}
}
FailPointServerParameter::FailPointServerParameter(StringData name, ServerParameterType spt)
: ServerParameter(kFailPointServerParameterPrefix.toString() + name.toString(), spt),
_data(getGlobalFailPointRegistry()->getFailPoint(name.toString())) {
invariant(name != "failpoint.*", "Failpoint prototype was auto-registered from IDL");
invariant(_data != nullptr, str::stream() << "Unknown failpoint: " << name);
}
void FailPointServerParameter::append(OperationContext* opCtx,
BSONObjBuilder& b,
const std::string& name) {
b << name << _data->toBSON();
}
Status FailPointServerParameter::setFromString(const std::string& str) {
BSONObj failPointOptions;
try {
failPointOptions = fromjson(str);
} catch (DBException& ex) {
return ex.toStatus();
}
auto swParsedOptions = FailPoint::parseBSON(failPointOptions);
if (!swParsedOptions.isOK()) {
return swParsedOptions.getStatus();
}
FailPoint::Mode mode;
FailPoint::ValType val;
BSONObj data;
std::tie(mode, val, data) = std::move(swParsedOptions.getValue());
_data->setMode(mode, val, data);
return Status::OK();
}
} // namespace mongo
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