Upload the contribution of vstf as bottleneck network framework.

[bottlenecks.git] / vstf / vstf / agent / env / driver_plugins / manager.py

diff --git a/vstf/vstf/agent/env/driver_plugins/manager.py b/vstf/vstf/agent/env/driver_plugins/manager.py
new file mode 100755 (executable)
index 0000000..3bb3fad
--- /dev/null
+++ b/vstf/vstf/agent/env/driver_plugins/manager.py
@@ -0,0 +1,40 @@
+"""
+Created on 2015-9-15
+
+@author: y00228926
+"""
+import stevedore
+
+
+class DriverPluginManager(object):
+    def __init__(self):
+        self.plugins = {}
+        self.mgr = stevedore.extension.ExtensionManager(namespace="drivers.plugins", invoke_on_load=True)
+
+    def load(self, drivers):
+        plugin = self.determine_driver_type(drivers)
+        ext = self.mgr[plugin]
+        ext.obj.load(drivers)
+        return True
+
+    def clean(self):
+        self.mgr.map(self._clean)
+        return True
+
+    def _clean(self, ext, *args, **kwargs):
+        ext.obj.clean()
+
+    def get_all_supported_drivers(self):
+        if not self.plugins:
+            for ext_name in self.mgr.names():
+                ext = self.mgr[ext_name]
+                self.plugins[ext_name] = ext.obj.get_supported_drivers()
+        return self.plugins
+
+    def determine_driver_type(self, drivers):
+        s = set(drivers)
+        for plugin, supported in self.get_all_supported_drivers().items():
+            if not (s - set(supported)):
+                return plugin
+        else:
+            raise Exception('unspported drivers: %s' % drivers)