Initial interface version

.gitignore

@@ -0,0 +1,3 @@
+.tox
+.project
+.pydevproject

copyright

@@ -0,0 +1,21 @@
+Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0
+
+Files: *
+Copyright: 2017, Canonical Ltd.
+License: Apache-2.0
+
+License: Apache-2.0
+ 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.
+ .
+ On Debian-based systems the full text of the Apache version 2.0 license
+ can be found in `/usr/share/common-licenses/Apache-2.0'.

interface.yaml

@@ -0,0 +1,3 @@
+name: gnocchi
+summary: Gnocchi Metrics Service interface
+version: 1

provides.py

@@ -0,0 +1,32 @@
+# Copyright 2017 Canonical Ltd
+#
+# 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 charms.reactive import RelationBase
+from charms.reactive import hook
+from charms.reactive import scopes
+
+
+class GnocchiProvides(RelationBase):
+    scope = scopes.UNIT
+
+    @hook('{provides:gnocchi}-relation-{joined}')
+    def joined(self):
+        self.set_state('{relation_name}.connected')
+
+    @hook('{provides:gnocchi}-relation-{broken}')
+    def broken(self):
+        self.remove_state('{relation_name}.connected')
+
+    def set_gnocchi_url(self, url):
+        self.set_remote(gnocchi_url=url)

requires.py

@@ -0,0 +1,35 @@
+# Copyright 2017 Canonical Ltd
+#
+# 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 charms.reactive import RelationBase
+from charms.reactive import hook
+from charms.reactive import scopes
+
+
+class GnocchiRequires(RelationBase):
+    scope = scopes.GLOBAL
+
+    auto_accessors = ['gnocchi_url']
+
+    @hook('{requires:gnocchi}-relation-{joined,changed,departed}')
+    def joined(self):
+        self.set_state('{relation_name}.connected')
+        if self.gnocchi_url() is not None:
+            self.set_state('{relation_name}.available')
+        else:
+            self.remove_state('{relation_name}.available')
+
+    @hook('{requires:gnocchi}-relation-{broken}')
+    def broken(self):
+        self.remove_state('{relation_name}.connected')

test-requirements.txt

@@ -0,0 +1,2 @@
+flake8>=2.2.4,<=2.4.1
+os-testr>=0.4.1

tox.ini

@@ -0,0 +1,43 @@
+[tox]
+envlist = pep8,py27,py34,py35
+skipsdist = True
+skip_missing_interpreters = True
+
+[testenv]
+setenv = VIRTUAL_ENV={envdir}
+         PYTHONHASHSEED=0
+install_command =
+  pip install --allow-unverified python-apt {opts} {packages}
+commands = ostestr {posargs}
+
+[testenv:py27]
+basepython = python2.7
+deps = -r{toxinidir}/test-requirements.txt
+# TODO: Need to write unit tests then remove the following command.
+# https://github.com/juju/charm-tools/issues/249
+commands = /bin/true
+
+[testenv:py34]
+basepython = python3.4
+deps = -r{toxinidir}/test-requirements.txt
+# TODO: Need to write unit tests then remove the following command.
+# https://github.com/juju/charm-tools/issues/249
+commands = /bin/true
+
+[testenv:py35]
+basepython = python3.5
+deps = -r{toxinidir}/test-requirements.txt
+# TODO: Need to write unit tests then remove the following command.
+# https://github.com/juju/charm-tools/issues/249
+commands = /bin/true
+
+[testenv:pep8]
+basepython = python2.7
+deps = -r{toxinidir}/test-requirements.txt
+commands = flake8 {posargs}
+
+[testenv:venv]
+commands = {posargs}
+
+[flake8]
+ignore = E402,E226