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diff --git a/wsrep-lib/dbsim/db_client_service.hpp b/wsrep-lib/dbsim/db_client_service.hpp
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+++ b/wsrep-lib/dbsim/db_client_service.hpp
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+/*
+ * Copyright (C) 2018 Codership Oy <info@codership.com>
+ *
+ * This file is part of wsrep-lib.
+ *
+ * Wsrep-lib is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * Wsrep-lib 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 General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with wsrep-lib.  If not, see <https://www.gnu.org/licenses/>.
+ */
+
+#ifndef WSREP_DB_CLIENT_SERVICE_HPP
+#define WSREP_DB_CLIENT_SERVICE_HPP
+
+#include "wsrep/client_service.hpp"
+#include "wsrep/transaction.hpp"
+
+namespace db
+{
+    class client;
+    class client_state;
+
+    class client_service : public wsrep::client_service
+    {
+    public:
+        client_service(db::client& client);
+
+        bool interrupted(wsrep::unique_lock<wsrep::mutex>&)
+            const override
+        { return false; }
+        void reset_globals() override { }
+        void store_globals() override { }
+        int prepare_data_for_replication() override
+        {
+            return 0;
+        }
+        void cleanup_transaction() override { }
+        size_t bytes_generated() const override
+        {
+            return 0;
+        }
+        bool statement_allowed_for_streaming() const override
+        {
+            return true;
+        }
+        int prepare_fragment_for_replication(wsrep::mutable_buffer&,
+                                             size_t& position) override
+        {
+            position = 0;
+            return 0;
+        }
+        int remove_fragments() override { return 0; }
+        int bf_rollback() override;
+        void will_replay() override { }
+        void signal_replayed() override { }
+        void wait_for_replayers(wsrep::unique_lock<wsrep::mutex>&) override { }
+        enum wsrep::provider::status replay()
+            override;
+
+        enum wsrep::provider::status replay_unordered() override
+        {
+            return wsrep::provider::success;
+        }
+
+        void emergency_shutdown() override { ::abort(); }
+
+        enum wsrep::provider::status commit_by_xid() override
+        {
+            return wsrep::provider::success;
+        }
+
+        bool is_explicit_xa() override
+        {
+            return false;
+        }
+
+        bool is_xa_rollback() override
+        {
+            return false;
+        }
+
+        void debug_sync(const char*) override { }
+        void debug_crash(const char*) override { }
+    private:
+        db::client& client_;
+        wsrep::client_state& client_state_;
+    };
+}
+
+#endif // WSREP_DB_CLIENT_SERVICE_HPP