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Diffstat (limited to 'simulator-cli/cli/client/tailf_client.py')
-rw-r--r-- | simulator-cli/cli/client/tailf_client.py | 59 |
1 files changed, 59 insertions, 0 deletions
diff --git a/simulator-cli/cli/client/tailf_client.py b/simulator-cli/cli/client/tailf_client.py new file mode 100644 index 0000000..d1cb60d --- /dev/null +++ b/simulator-cli/cli/client/tailf_client.py @@ -0,0 +1,59 @@ +### +# ============LICENSE_START======================================================= +# Simulator +# ================================================================================ +# Copyright (C) 2019 Nokia. All rights reserved. +# ================================================================================ +# 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. +# ============LICENSE_END========================================================= +### + +import logging + +import websockets +import asyncio +import signal +import sys + + +class TailfClient(object): + + def __init__(self, url: str, verbose: bool = False) -> None: + self._url = url + self._is_running = False + self._connection = None + self.logger = logging.getLogger() + self.logger.setLevel(logging.DEBUG if verbose else logging.INFO) + signal.signal(signal.SIGINT, self._handle_keyboard_interrupt) + + def tailf_messages(self): + self._is_running = True + self.logger.debug("Attempting to connect to websocket server on %s", self._url) + asyncio.get_event_loop().run_until_complete( + self._tailf_messages() + ) + + async def _tailf_messages(self): + try: + async with websockets.connect(self._url) as connection: + self.logger.debug("Connection with %s established", self._url) + self._connection = connection + while self._is_running: + print(await self._connection.recv(), "\n") + except ConnectionRefusedError: + self.logger.error("Cannot establish connection with %s", self._url) + + def _handle_keyboard_interrupt(self, sig, frame): + self.logger.warning("CTR-C pressed, interrupting.") + self._is_running = False + sys.exit(0) |