added versions to api and updated requirements falcon==0.2.0

etc/events_api.conf

@@ -10,6 +10,7 @@ region = useast
 
 # Dispatchers to be loaded to serve restful APIs
 [dispatcher]
+versions = monasca_events_api.v2.versions:Versions
 stream_definitions = monasca_events_api.v2.stream_definitions:StreamDefinitions
 events = monasca_events_api.v2.events:Events
 transforms  = monasca_events_api.v2.transforms:Transforms

monasca_events_api/api/server.py

@@ -22,7 +22,9 @@ import paste.deploy
 import simport
 
 
-dispatcher_opts = [cfg.StrOpt('stream_definitions', default=None,
+dispatcher_opts = [cfg.StrOpt('versions', default=None,
+                              help='Versions endpoint'),
+                   cfg.StrOpt('stream_definitions', default=None,
                               help='Stream definition endpoint'),
                    cfg.StrOpt('events', default=None,
                               help='Events endpoint'),
@@ -46,6 +48,10 @@ def launch(conf, config_file="/etc/monasca/events_api.conf"):
 
     app = falcon.API()
 
+    versions = simport.load(cfg.CONF.dispatcher.versions)()
+    app.add_route("/", versions)
+    app.add_route("/{version_id}", versions)
+
     events = simport.load(cfg.CONF.dispatcher.events)()
     app.add_route("/v2.0/events", events)
     app.add_route("/v2.0/events/{event_id}", events)

monasca_events_api/api/versions_api.py

@@ -0,0 +1,26 @@
+# Copyright 2015 Hewlett-Packard
+#
+# 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 oslo_log import log
+
+LOG = log.getLogger(__name__)
+
+
+class VersionsAPI(object):
+    def __init__(self):
+        super(VersionsAPI, self).__init__()
+        LOG.info('Initializing Versions!')
+
+    def on_get(self, req, res, id):
+        res.status = '501 Not Implemented'

monasca_events_api/v2/versions.py

@@ -0,0 +1,63 @@
+# Copyright 2015 Hewlett-Packard
+#
+# 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.
+import json
+
+import falcon
+
+from monasca_events_api.api import versions_api
+from oslo_log import log
+
+LOG = log.getLogger(__name__)
+VERSIONS = {
+    'v2.0': {
+        'id': 'v2.0',
+        'links': [{
+            'rel': 'self',
+            'href': ''
+        }],
+        'status': 'CURRENT',
+        'updated': "2014-02-18T00:00:00Z"
+    }
+}
+
+
+class Versions(versions_api.VersionsAPI):
+
+    def __init__(self):
+        super(Versions, self).__init__()
+
+    def on_get(self, req, res, version_id=None):
+        result = {
+            'links': [{
+                'rel': 'self',
+                'href': req.uri.decode('utf8')
+            }],
+            'elements': []
+        }
+        if version_id is None:
+            for version in VERSIONS:
+                VERSIONS[version]['links'][0]['href'] = (
+                    req.uri.decode('utf8') + version)
+                result['elements'].append(VERSIONS[version])
+            res.body = json.dumps(result)
+            res.status = falcon.HTTP_200
+        else:
+            if version_id in VERSIONS:
+                VERSIONS[version_id]['links'][0]['href'] = (
+                    req.uri.decode('utf8'))
+                res.body = json.dumps(VERSIONS[version_id])
+                res.status = falcon.HTTP_200
+            else:
+                res.body = 'Invalid Version ID'
+                res.status = falcon.HTTP_400

requirements.txt

@@ -20,7 +20,7 @@
 # The above command will install monasca-api base and elasticsearch
 # implementation while leave other implementation dependencies alone.
 
-falcon>=0.2
+falco==0.2
 gunicorn>=19.1.0
 keystonemiddleware
 oslo.config>=1.2.1