SERVER-18288 implement a common interface for OP_COMMAND and OP_QUERY

1 files changed, 75 insertions, 0 deletions

diff --git a/src/mongo/rpc/legacy_request_builder.h b/src/mongo/rpc/legacy_request_builder.h
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+++ b/src/mongo/rpc/legacy_request_builder.h
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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.
+ */
+
+#pragma once
+
+#include <memory>
+
+#include "mongo/base/string_data.h"
+#include "mongo/db/jsobj.h"
+#include "mongo/rpc/document_range.h"
+#include "mongo/rpc/request_builder_interface.h"
+#include "mongo/util/net/message.h"
+
+namespace mongo {
+namespace rpc {
+
+    class LegacyRequestBuilder : public RequestBuilderInterface {
+    public:
+        LegacyRequestBuilder();
+        ~LegacyRequestBuilder() final;
+
+        LegacyRequestBuilder(std::unique_ptr<Message>);
+
+        LegacyRequestBuilder& setDatabase(StringData database) final;
+        LegacyRequestBuilder& setCommandName(StringData commandName) final;
+        LegacyRequestBuilder& setMetadata(BSONObj metadata) final;
+        LegacyRequestBuilder& setCommandArgs(BSONObj commandArgs) final;
+
+        LegacyRequestBuilder& addInputDocs(DocumentRange inputDocs) final;
+        LegacyRequestBuilder& addInputDoc(BSONObj inputDoc) final;
+
+        State getState() const final;
+
+        std::unique_ptr<Message> done() final;
+
+    private:
+        std::unique_ptr<Message> _message;
+        BufBuilder _builder{};
+
+        // we need to stash this as we need commandArgs to
+        // upconvert.
+        BSONObj _metadata;
+
+        std::string _ns{}; // copied to in setDatabase
+
+        State _state{State::kDatabase};
+    };
+
+}  // namespace rpc
+}  // namespace mongo