From 23c6f49f874b5cb2dc7e94aa3b47136ee042bd32 Mon Sep 17 00:00:00 2001
From: termie <github@anarkystic.com>
Date: Tue, 3 Jan 2012 16:00:59 -0800
Subject: example crud extension for create_tenant

---
 keystonelight/keystone_compat.py        | 13 ++++++++++
 keystonelight/wsgi.py                   | 42 +++++++++++++++++++++++++++++++++
 tests/keystoneclient_compat_master.conf |  5 +++-
 3 files changed, 59 insertions(+), 1 deletion(-)

diff --git a/keystonelight/keystone_compat.py b/keystonelight/keystone_compat.py
index 8e5a15d0..6ff95bd1 100644
--- a/keystonelight/keystone_compat.py
+++ b/keystonelight/keystone_compat.py
@@ -125,6 +125,19 @@ class KeystoneServiceRouter(wsgi.Router):
         super(KeystoneServiceRouter, self).__init__(mapper)
 
 
+class KeystoneAdminCrudExtension(wsgi.ExtensionRouter):
+    def __init__(self, application, options):
+        self.options = options
+        mapper = routes.Mapper()
+        tenant_controller = KeystoneTenantController(self.options)
+        mapper.connect('/tenants',
+                       controller=tenant_controller,
+                       action='create_tenant',
+                       conditions=dict(method=['POST']))
+        super(KeystoneAdminCrudExtension, self).__init__(
+                application, options, mapper)
+
+
 class KeystoneTokenController(service.BaseApplication):
     def __init__(self, options):
         self.options = options
diff --git a/keystonelight/wsgi.py b/keystonelight/wsgi.py
index 5ba1d5ce..0744fd32 100644
--- a/keystonelight/wsgi.py
+++ b/keystonelight/wsgi.py
@@ -308,3 +308,45 @@ class Router(object):
             return webob.exc.HTTPNotFound()
         app = match['controller']
         return app
+
+
+class ExtensionRouter(Router):
+    """A router that allows extensions to supplement or overwrite routes.
+
+    Expects to be subclassed.
+    """
+    def __init__(self, application, options, mapper):
+        self.options = options
+        self.application = application
+
+        mapper.connect('{path_info:.*}', controller=self.application)
+        super(ExtensionRouter, self).__init__(mapper)
+
+    @classmethod
+    def factory(cls, global_config, **local_config):
+        """Used for paste app factories in paste.deploy config files.
+
+        Any local configuration (that is, values under the [filter:APPNAME]
+        section of the paste config) will be passed into the `__init__` method
+        as kwargs.
+
+        A hypothetical configuration would look like:
+
+            [filter:analytics]
+            redis_host = 127.0.0.1
+            paste.filter_factory = nova.api.analytics:Analytics.factory
+
+        which would result in a call to the `Analytics` class as
+
+            import nova.api.analytics
+            analytics.Analytics(app_from_paste, redis_host='127.0.0.1')
+
+        You could of course re-implement the `factory` method in subclasses,
+        but using the kwarg passing it shouldn't be necessary.
+
+        """
+        def _factory(app):
+            conf = global_config.copy()
+            conf.update(local_config)
+            return cls(app, conf)
+        return _factory
diff --git a/tests/keystoneclient_compat_master.conf b/tests/keystoneclient_compat_master.conf
index c6e4ee06..1930c50c 100644
--- a/tests/keystoneclient_compat_master.conf
+++ b/tests/keystoneclient_compat_master.conf
@@ -34,6 +34,9 @@ paste.filter_factory = keystonelight.middleware:AdminTokenAuthMiddleware.factory
 [filter:json_body]
 paste.filter_factory = keystonelight.middleware:JsonBodyMiddleware.factory
 
+[filter:crud_extension]
+paste.filter_factory = keystonelight.keystone_compat:KeystoneAdminCrudExtension.factory
+
 [app:keystonelight]
 paste.app_factory = keystonelight.service:app_factory
 
@@ -50,7 +53,7 @@ pipeline = token_auth admin_token_auth json_body debug keystonelight
 pipeline = token_auth admin_token_auth json_body debug keystone_service
 
 [pipeline:keystone_admin_api]
-pipeline = token_auth admin_token_auth json_body debug keystone_admin
+pipeline = token_auth admin_token_auth json_body debug crud_extension keystone_admin
 
 [composite:main]
 use = egg:Paste#urlmap
-- 
cgit