From 8f3e2139ed891fdb51e8af8101383ab2ec2df30f Mon Sep 17 00:00:00 2001
From: Alexey Yelistratov <ayelistratov@mirantis.com>
Date: Wed, 27 Apr 2016 19:09:20 +0300
Subject: [PATCH] Add MongoDB driver

Change-Id: Ibc3c02ee1da5c977b7ddaa909ea7e8cdfb439773
---
 osprofiler/drivers/__init__.py |  1 +
 osprofiler/drivers/mongodb.py  | 92 ++++++++++++++++++++++++++++++++++
 2 files changed, 93 insertions(+)
 create mode 100644 osprofiler/drivers/mongodb.py

diff --git a/osprofiler/drivers/__init__.py b/osprofiler/drivers/__init__.py
index c89cabb..208957a 100644
--- a/osprofiler/drivers/__init__.py
+++ b/osprofiler/drivers/__init__.py
@@ -1,2 +1,3 @@
 from osprofiler.drivers import base  # noqa
 from osprofiler.drivers import messaging  # noqa
+from osprofiler.drivers import mongodb  # noqa
diff --git a/osprofiler/drivers/mongodb.py b/osprofiler/drivers/mongodb.py
new file mode 100644
index 0000000..60d7b2c
--- /dev/null
+++ b/osprofiler/drivers/mongodb.py
@@ -0,0 +1,92 @@
+# Copyright 2016 Mirantis Inc.
+# All Rights Reserved.
+#
+#    Licensed under the Apache License, Version 2.0 (the "License"); you may
+#    not use this file except in compliance with the License. You may obtain
+#    a copy of the License at
+#
+#         http://www.apache.org/licenses/LICENSE-2.0
+#
+#    Unless required by applicable law or agreed to in writing, software
+#    distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
+#    WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
+#    License for the specific language governing permissions and limitations
+#    under the License.
+
+from osprofiler.drivers import base
+from osprofiler import exc
+
+
+class MongoDB(base.Driver):
+    def __init__(self, connection_str, db_name="osprofiler", project=None,
+                 service=None, host=None, **kwargs):
+        """MongoDB driver for OSProfiler."""
+
+        super(MongoDB, self).__init__(connection_str, project=project,
+                                      service=service, host=host)
+        try:
+            from pymongo import MongoClient
+        except ImportError:
+            raise exc.CommandError(
+                "To use this command, you should install "
+                "'pymongo' manually. Use command:\n "
+                "'pip install pymongo'.")
+
+        client = MongoClient(self.connection_str, connect=False)
+        self.db = client[db_name]
+
+    @classmethod
+    def get_name(cls):
+        return "mongodb"
+
+    def notify(self, info):
+        """Send notifications to MongoDB.
+
+        :param info:  Contains information about trace element.
+                      In payload dict there are always 3 ids:
+                      "base_id" - uuid that is common for all notifications
+                                  related to one trace. Used to simplify
+                                  retrieving of all trace elements from
+                                  MongoDB.
+                      "parent_id" - uuid of parent element in trace
+                      "trace_id" - uuid of current element in trace
+
+                      With parent_id and trace_id it's quite simple to build
+                      tree of trace elements, which simplify analyze of trace.
+
+        """
+        data = info.copy()
+        data["project"] = self.project
+        data["service"] = self.service
+        self.db.profiler.insert_one(data)
+
+    def list_traces(self, query, fields=[]):
+        """Returns array of all base_id fields that match the given criteria
+
+        :param query: dict that specifies the query criteria
+        :param fields: iterable of strings that specifies the output fields
+        """
+        ids = self.db.profiler.find(query).distinct("base_id")
+        out_format = {"base_id": 1, "timestamp": 1, "_id": 0}
+        out_format.update({i: 1 for i in fields})
+        return [self.db.profiler.find(
+                {"base_id": i}, out_format).sort("timestamp")[0] for i in ids]
+
+    def get_report(self, base_id):
+        """Retrieves and parses notification from MongoDB.
+
+        :param base_id: Base id of trace elements.
+        """
+        for n in self.db.profiler.find({"base_id": base_id}, {"_id": 0}):
+            trace_id = n["trace_id"]
+            parent_id = n["parent_id"]
+            name = n["name"]
+            project = n["project"]
+            service = n["service"]
+            host = n["info"]["host"]
+            timestamp = n["timestamp"]
+
+            self._append_results(trace_id, parent_id, name, project, service,
+                                 host, timestamp, n)
+
+        return self._parse_results()