| # |
| # Licensed to the Apache Software Foundation (ASF) under one |
| # or more contributor license agreements. See the NOTICE file |
| # distributed with this work for additional information |
| # regarding copyright ownership. The ASF licenses this file |
| # to you 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 tornado import ioloop, websocket |
| from tornado import httpclient |
| |
| from gremlin_python.driver.transport import AbstractBaseTransport |
| |
| __author__ = 'David M. Brown (davebshow@gmail.com)' |
| |
| |
| class TornadoTransport(AbstractBaseTransport): |
| |
| def __init__(self, read_timeout=None, write_timeout=None, |
| compression_options={'compression_level': 5, 'mem_level': 5}): |
| self._loop = ioloop.IOLoop(make_current=False) |
| self._ws = None |
| self._read_timeout = read_timeout |
| self._write_timeout = write_timeout |
| self._compression_options = compression_options |
| |
| def connect(self, url, headers=None): |
| if headers: |
| url = httpclient.HTTPRequest(url, headers=headers) |
| self._ws = self._loop.run_sync( |
| lambda: websocket.websocket_connect(url, compression_options=self._compression_options)) |
| |
| def write(self, message): |
| self._loop.run_sync( |
| lambda: self._ws.write_message(message, binary=True), timeout=self._write_timeout) |
| |
| def read(self): |
| return self._loop.run_sync(lambda: self._ws.read_message(), timeout=self._read_timeout) |
| |
| def close(self): |
| self._ws.close() |
| self._loop.close() |
| |
| def closed(self): |
| return not self._ws.protocol |
