Initial code drop

copyright

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+Format: http://www.debian.org/doc/packaging-manuals/copyright-format/1.0
+
+Files: *
+Copyright: 2015, Canonical Ltd.
+License: GPL-3
+
+License: GPL-3
+ On Debian GNU/Linux system you can find the complete text of the
+ GPL-3 license in '/usr/share/common-licenses/GPL-3'

interface.yaml

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+name: odl-controller-api
+summary: Interface for intergrating with an OpenDayLight Controller RESTful API
+maintainer: James Page <james.page@ubuntu.com>

requires.py

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+from charmhelpers.core.reactive import hook
+from charmhelpers.core.reactive import RelationBase
+from charmhelpers.core.reactive import scopes
+
+
+class ControllerAPIRequires(RelationBase):
+    scope = scopes.GLOBAL
+    auto_accessors = ['private-address', 'host', 'port',
+                      'username', 'password']
+
+    @hook('{requires:odl-controller-api}-relation-{joined,changed,departed}')
+    def changed(self):
+        self.set_state('{relation_name}.connected')
+        if self.connection():
+            self.set_state('{relation_name}.access.available')
+        else:
+            self.remove_state('{relation_name}.access.available')
+
+    @hook('{requires:odl-controller-api}-relation-broken')
+    def broken(self):
+        self.remove_state('{relation_name}.connected')
+        self.remove_state('{relation_name}.access.available')
+
+    def connection(self):
+        """OpenDayLight Controller Access Details
+
+        Returns a dict of key value pairs for accessing the ODL controller API.
+        """
+        data = {
+            'host': self.host() or self.private_address(),
+            'port': self.port() or '8181',
+            'username': self.username(),
+            'password': self.password(),
+        }
+        if all(data.values()):
+            return data
+        else:
+            return None