Initial commit

[ta/config-manager.git] / cmframework / src / cmframework / utils / cmuserconfig.py

diff --git a/cmframework/src/cmframework/utils/cmuserconfig.py b/cmframework/src/cmframework/utils/cmuserconfig.py
new file mode 100644 (file)
index 0000000..00adf6d
--- /dev/null
+++ b/cmframework/src/cmframework/utils/cmuserconfig.py
@@ -0,0 +1,111 @@
+# Copyright 2019 Nokia
+
+# 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 __future__ import print_function
+import json
+import yaml
+
+from cmframework.apis import cmerror
+from cmframework.utils.cmpluginloader import CMPluginLoader
+from cmdatahandlers.api import configmanager
+
+
+class UserConfig(object):
+
+    def __init__(self, user_config_file, plugin_path):
+        self.user_config_file = user_config_file
+        self.removed_values = ['version']
+        self.pluginloader = UserConfigPluginLoader(plugin_path)
+
+    def get_flat_config(self):
+        try:
+            result = {}
+            stream = file(self.user_config_file, 'r')
+            tmp = yaml.load(stream)
+            userconfig = {}
+            for key in tmp.keys():
+                userconfig['cloud.' + key] = tmp[key]
+
+            confman = configmanager.ConfigManager(userconfig)
+            self.pluginloader.load()
+            plugins = self.pluginloader.get_plugin_instances()
+            for _, plugin in plugins.iteritems():
+                plugin.handle(confman)
+
+            # change the multi-level deictionary to one level dictionary mapping
+            # the key to a josn string representation of the value.
+            for key, value in userconfig.iteritems():
+                result[key] = json.dumps(value)
+
+            return result
+        except Exception as exp:
+            raise cmerror.CMError("Failed to load user config %(userconfig)s: %(failure)s" %
+                                  {'userconfig': self.user_config_file,
+                                   'failure': str(exp)})
+
+
+class UserConfigPluginLoader(CMPluginLoader):
+    def __init__(self, plugin_location, plugin_filter=None):
+        super(UserConfigPluginLoader, self).__init__(plugin_location, plugin_filter)
+
+    def build_filter_dict(self):
+        pass
+
+    def get_plugin_instances(self):
+        plugs = {}
+        for plugin, module in self.loaded_plugin.iteritems():
+            class_name = getattr(module, plugin)
+            instance = class_name()
+            plugs[plugin] = instance
+        return plugs
+
+
+def main():
+    import argparse
+    import sys
+    import traceback
+
+    parser = argparse.ArgumentParser(description='Test userconfig handler', prog=sys.argv[0])
+
+    parser.add_argument('--config',
+                        required=True,
+                        dest='config',
+                        metavar='CONFIG',
+                        help='The user config yaml file',
+                        type=str,
+                        action='store')
+
+    parser.add_argument('--plugins',
+                        required=True,
+                        dest='plugins',
+                        metavar='PLUGINS',
+                        help='The path to userconfig plugin(s)',
+                        type=str,
+                        action='store')
+
+    try:
+        args = parser.parse_args(sys.argv[1:])
+        config = UserConfig(args.config, args.plugins)
+        data = config.get_flat_config()
+        for key, value in data.iteritems():
+            print('%s=%s' % (key, value))
+
+    except Exception as exp:  # pylint: disable=broad-except
+        print("Got exp: %s" % exp)
+        traceback.print_exc()
+        sys.exit(1)
+    sys.exit(1)
+
+
+if __name__ == '__main__':
+    main()