tracing: add a serializable trace_info object

tracing::trace_info is used to pass the tracing information between nodes.

Signed-off-by: Vlad Zolotarov <vladz@cloudius-systems.com>

configure.py

@@ -535,6 +535,7 @@ idls = ['idl/gossip_digest.idl.hh',
         'idl/query.idl.hh',
         'idl/idl_test.idl.hh',
         'idl/commitlog.idl.hh',
+        'idl/tracing.idl.hh',
         ]
 
 scylla_tests_dependencies = scylla_core + api + idls + [

idl/tracing.idl.hh

@@ -0,0 +1,35 @@
+/*
+ * Copyright 2016 ScyllaDB
+ */
+
+/*
+ * This file is part of Scylla.
+ *
+ * Scylla is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU Affero General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * Scylla 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 Scylla.  If not, see <http://www.gnu.org/licenses/>.
+ */
+
+namespace tracing {
+enum class trace_type : uint8_t {
+    NONE,
+    QUERY,
+    REPAIR,
+};
+
+class trace_info {
+    utils::UUID session_id;
+    tracing::trace_type type;
+    bool flush_on_close;
+};
+}
+

tracing/tracing.hh

@@ -83,6 +83,20 @@ inline gc_clock::duration ttl_by_type(const trace_type t) {
     }
 }
 
+class trace_info {
+public:
+    utils::UUID session_id;
+    trace_type type;
+    bool flush_on_close;
+
+public:
+    trace_info(utils::UUID sid, trace_type t, bool f_o_c)
+        : session_id(std::move(sid))
+        , type(t)
+        , flush_on_close(f_o_c)
+    { }
+};
+
 struct i_tracing_backend_helper {
     virtual ~i_tracing_backend_helper() {}
     virtual future<> start() = 0;