Add cloudtaf framework

[ta/cloudtaf.git] / libraries / cluster / usergen.py

diff --git a/libraries/cluster/usergen.py b/libraries/cluster/usergen.py
new file mode 100644 (file)
index 0000000..5bcdb5d
--- /dev/null
+++ b/libraries/cluster/usergen.py
@@ -0,0 +1,39 @@
+# 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.
+
+import itertools
+
+
+class UserGen(object):
+
+    def __init__(self, roles_len):
+        self._roles_len = roles_len
+        self._usergens = {}
+
+    def create_username(self, roles):
+        if not roles:
+            return 'no_roles'
+        if len(roles) == self._roles_len:
+            return 'all_roles'
+        return next(self._get_user_gen(sorted(roles)[0]))
+
+    def _get_user_gen(self, base):
+        if base not in self._usergens:
+            self._usergens[base] = self._user_gen(base)
+        return self._usergens[base]
+
+    @staticmethod
+    def _user_gen(base):
+        for idx in itertools.count():  # pragma: no branch
+            yield '{base}{idx}'.format(base=base, idx=idx)