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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/platform/basic.h"
#include "mongo/db/commands.h"
#include "mongo/db/wire_version.h"
#include "mongo/s/write_ops/batched_command_request.h"
namespace mongo {
namespace {
class CmdIsMaster : public Command {
public:
CmdIsMaster() : Command("isMaster", false, "ismaster") { }
virtual bool isWriteCommandForConfigServer() const {
return false;
}
virtual bool slaveOk() const {
return true;
}
virtual void help(std::stringstream& help) const {
help << "test if this is master half of a replica pair";
}
virtual void addRequiredPrivileges(const std::string& dbname,
const BSONObj& cmdObj,
std::vector<Privilege>* out) {
// No auth required
}
virtual bool run(OperationContext* txn,
const std::string& dbname,
BSONObj& cmdObj,
int options,
std::string& errmsg,
BSONObjBuilder& result) {
result.appendBool("ismaster", true);
result.append("msg", "isdbgrid");
result.appendNumber("maxBsonObjectSize", BSONObjMaxUserSize);
result.appendNumber("maxMessageSizeBytes", MaxMessageSizeBytes);
result.appendNumber("maxWriteBatchSize", BatchedCommandRequest::kMaxWriteBatchSize);
result.appendDate("localTime", jsTime());
// Mongos tries to keep exactly the same version range of the server for which
// it is compiled.
result.append("maxWireVersion", maxWireVersion);
result.append("minWireVersion", minWireVersion);
return true;
}
} isMaster;
} // namespace
} // namespace mongo
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