Update O2app start with global ocloud ID

[pti/o2.git] / o2common / config / base.py

diff --git a/o2common/config/base.py b/o2common/config/base.py
new file mode 100644 (file)
index 0000000..af49f30
--- /dev/null
+++ b/o2common/config/base.py
@@ -0,0 +1,139 @@
+# Copyright (C) 2022 Wind River Systems, Inc.
+#
+#  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.
+
+import os
+import configparser
+
+
+class Error(Exception):
+    """Base class for cfg exceptions."""
+
+    def __init__(self, msg=None):
+        self.msg = msg
+
+    def __str__(self):
+        return self.msg
+
+
+class NoSuchOptError(Error, AttributeError):
+    """Raised if an opt which doesn't exist is referenced."""
+
+    def __init__(self, opt_name, group=None):
+        self.opt_name = opt_name
+        self.group = group
+
+    def __str__(self):
+        group_name = 'DEFAULT' if self.group is None else self.group.name
+        return "no such option %s in group [%s]" % (self.opt_name, group_name)
+
+
+class NoSuchConfigFile(Error):
+    """Raised if the config file does not exist."""
+
+    def __init__(self, file_path):
+        self.file_path = file_path
+
+    def __str__(self):
+        return "no such file %s exist" % self.file_path
+
+
+class Section:
+    def __init__(self, section: str) -> None:
+        self.group_name = section
+        self._options = {}
+
+    def _set(self, name, value):
+        opt = getattr(self, name)
+        if opt is None:
+            setattr(self, name, value)
+        if name not in self._options:
+            self._options[name] = value
+
+    def _get(self, name):
+        name = name.lower()
+        if name in self._options:
+            return self._options[name]
+
+    def __getattr__(self, name):
+        try:
+            return self._get(name)
+        except ValueError:
+            raise
+        except Exception:
+            raise NoSuchOptError(name, self.group_name)
+
+
+class Config:
+    def __init__(self) -> None:
+        self.__cache = {'b': 456}
+        self._sections = {}
+
+    def _set(self, section, name='', value=''):
+        group = getattr(self, section)
+        if group is None:
+            group = Section(section)
+            setattr(self, section, group)
+        if section not in self._sections:
+            self._sections[section] = group
+        if name != '':
+            setattr(group, name, value)
+        return group
+
+    def _get(self, name):
+        if name in self._sections:
+            return self._sections(name)
+
+        if name in self.__cache:
+            return self.__cache(name)
+
+    def __getattr__(self, name):
+        try:
+            return self._get(name)
+        except ValueError:
+            raise
+        except Exception:
+            raise NoSuchOptError(name)
+
+    def load(self, file_path):
+        if not os.path.exists(file_path):
+            raise NoSuchConfigFile(file_path)
+        conf = configparser.ConfigParser()
+        conf.read(file_path)
+        default_group = self._set('DEFAULT')
+        for option in conf['DEFAULT']:
+            print(option)
+            default_group._set(option, conf['DEFAULT'][option])
+        for section in conf.sections():
+            group = self._set(section)
+            for option in conf[section]:
+                group._set(option, conf[section][option])
+
+
+if __name__ == "__main__":
+    conf = Config()
+    # conf._set('default', 'a', 123)
+
+    # print(conf.default.a)
+    # print(conf.b)
+
+    # conf = configparser.ConfigParser()
+    # conf.read('configs/o2app.conf')
+    # print(conf)
+    # print(conf['DEFAULT'].__dict__)
+    # print(conf['DEFAULT']['test'])
+    conf.load('configs/o2app.conf')
+    print(conf.API.test)
+    print(conf.DEFAULT.test)
+    print(conf.PUBSUB.ooo)
+    print(conf.DEFAULT.oCloudGlobalID)