SERVER-18288 implement a common interface for OP_COMMAND and OP_QUERY

1 files changed, 60 insertions, 0 deletions

diff --git a/src/mongo/rpc/factory.h b/src/mongo/rpc/factory.h
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+++ b/src/mongo/rpc/factory.h
@@ -0,0 +1,60 @@
+/**
+ *    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 "mongo/rpc/protocol.h"
+
+#include <memory>
+
+/**
+ * Utilities to construct the correct concrete rpc class based on what the remote server
+ * supports, and what the client has been configured to do.
+ */
+
+namespace mongo {
+    class Message;
+
+namespace rpc {
+    class ReplyInterface;
+    class RequestBuilderInterface;
+
+    /**
+     * Returns the appropriate concrete RequestBuilder. Throws if one cannot be chosen.
+     */
+    std::unique_ptr<RequestBuilderInterface> makeRequestBuilder(ProtocolSet clientProtos,
+                                                                ProtocolSet serverProtos);
+    /**
+     * Returns the appropriate concrete Reply. Throws if one cannot be chosen.
+     */
+    std::unique_ptr<ReplyInterface> makeReply(const Message* unownedMessage,
+                                              ProtocolSet clientProtos,
+                                              ProtocolSet serverProtos);
+
+}  // namespace rpc
+}  // namespace mongo