Framework: Telemetry retake

[csit.git] / resources / tools / telemetry / executor.py

diff --git a/resources/tools/telemetry/executor.py b/resources/tools/telemetry/executor.py
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+# Copyright (c) 2021 Cisco and/or its affiliates.
+# 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.
+
+"""Config executor library."""
+
+from importlib import import_module
+from logging.config import dictConfig
+from logging import getLogger
+import sys
+
+from .parser import Parser
+from .serializer import Serializer
+
+
+class Executor:
+    """
+    Executor class reponsible for executing configuration.
+    """
+    def __init__(self, configuration_file):
+        """
+        Config Executor init.
+
+        :param configuration_file: Telemetry configuration file path.
+        :type configuration_file: str
+        """
+        self.parser = Parser(configuration_file)
+        self.log = self.parser.config[u"logging"]
+        self.programs = self.parser.config[u"programs"]
+        self.scheduler = self.parser.config[u"scheduler"]
+
+        dictConfig(self.log)
+
+    def execute(self, hook=None):
+        """
+        Main executor function will run programs from all bundles in a loop.
+
+        Function call:
+            attach(duration)
+            fetch_data()
+            process_data()
+            detach()
+
+        :param hook: Process ID or socket to attach. None by default.
+        :type hook: int
+        """
+        for program in self.programs:
+            serializer = Serializer()
+            try:
+                package = program[u"name"]
+                name = f"telemetry.{package}"
+                package = package.replace("_", " ").title().replace(" ", "")
+                module = import_module(
+                    name=name,
+                    package=package
+                )
+                bundle = getattr(module, package)(
+                    program=program,
+                    serializer=serializer,
+                    hook=hook
+                )
+                bundle.attach(duration=self.scheduler[u"duration"])
+                bundle.fetch_data()
+                bundle.process_data()
+                bundle.detach()
+            except (ImportError, AttributeError) as exc:
+                raise ExecutorError(
+                    f"Error executing bundle {package!r}! - {exc}"
+                )
+            serializer.publish()
+
+    def execute_daemon(self, hook=None):
+        """
+        Daemon executor will execute endless loop.
+
+        :param hook: Process ID to attach. None by default.
+        :type hook: int
+        """
+        while True:
+            self.execute(hook=hook)
+
+
+class ExecutorError(Exception):
+    """
+    Creates a Executor Error Exception. This exception is supposed to handle
+    all the errors raised during executing.
+    """
+    def __init__(self, message):
+        """
+        Execute Error Excpetion init.
+
+        :param message: Exception error message.
+        :type message: str
+        """
+        super().__init__()
+        self.message = message
+        getLogger(__name__).error(message)
+        sys.exit(1)