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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/rpc/legacy_request_builder.h"
#include <tuple>
#include <utility>
#include "mongo/db/namespace_string.h"
#include "mongo/rpc/metadata.h"
#include "mongo/stdx/memory.h"
#include "mongo/util/assert_util.h"
#include "mongo/util/net/message.h"
namespace mongo {
namespace rpc {
LegacyRequestBuilder::LegacyRequestBuilder() : LegacyRequestBuilder(Message()) {}
LegacyRequestBuilder::~LegacyRequestBuilder() {}
LegacyRequestBuilder::LegacyRequestBuilder(Message&& message) : _message{std::move(message)} {
_builder.skip(mongo::MsgData::MsgDataHeaderSize);
}
LegacyRequestBuilder& LegacyRequestBuilder::setDatabase(StringData database) {
invariant(_state == State::kDatabase);
_ns = NamespaceString(database, "$cmd").toString();
_state = State::kCommandName;
return *this;
}
LegacyRequestBuilder& LegacyRequestBuilder::setCommandName(StringData commandName) {
invariant(_state == State::kCommandName);
// no op, as commandName is the first element of commandArgs
_state = State::kCommandArgs;
return *this;
}
LegacyRequestBuilder& LegacyRequestBuilder::setCommandArgs(BSONObj commandArgs) {
invariant(_state == State::kCommandArgs);
_commandArgs = std::move(commandArgs);
_state = State::kMetadata;
return *this;
}
LegacyRequestBuilder& LegacyRequestBuilder::setMetadata(BSONObj metadata) {
invariant(_state == State::kMetadata);
BSONObj legacyCommandArgs;
int queryOptions;
std::tie(legacyCommandArgs, queryOptions) = uassertStatusOK(
rpc::downconvertRequestMetadata(std::move(_commandArgs), std::move(metadata)));
_builder.appendNum(queryOptions); // queryOptions
_builder.appendStr(_ns);
_builder.appendNum(0); // nToSkip
_builder.appendNum(1); // nToReturn
legacyCommandArgs.appendSelfToBufBuilder(_builder);
_state = State::kInputDocs;
return *this;
}
Protocol LegacyRequestBuilder::getProtocol() const {
return rpc::Protocol::kOpQuery;
}
Message LegacyRequestBuilder::done() {
invariant(_state == State::kInputDocs);
MsgData::View msg = _builder.buf();
msg.setLen(_builder.len());
msg.setOperation(dbQuery);
_message.setData(_builder.release());
_state = State::kDone;
return std::move(_message);
}
} // namespace rpc
} // namespace mongo
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