87 lines
2.4 KiB
Python
87 lines
2.4 KiB
Python
# Copyright 2017 Mycroft AI Inc.
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#
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# Licensed under the Apache License, Version 2.0 (the "License");
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# you may not use this file except in compliance with the License.
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# You may obtain a copy of the License at
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#
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# http://www.apache.org/licenses/LICENSE-2.0
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#
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# Unless required by applicable law or agreed to in writing, software
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# distributed under the License is distributed on an "AS IS" BASIS,
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# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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# See the License for the specific language governing permissions and
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# limitations under the License.
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#
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import time
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from threading import Lock
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from uuid import uuid4
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from mycroft.configuration import Configuration
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from mycroft.util.log import LOG
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class Session(object):
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"""
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An object representing a Mycroft Session Identifier
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"""
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def __init__(self, session_id, expiration_seconds=180):
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self.session_id = session_id
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self.touch_time = int(time.time())
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self.expiration_seconds = expiration_seconds
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def touch(self):
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"""
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update the touch_time on the session
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:return:
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"""
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self.touch_time = int(time.time())
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def expired(self):
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"""
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determine if the session has expired
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:return:
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"""
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return int(time.time()) - self.touch_time > self.expiration_seconds
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def __str__(self):
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return "{%s,%d}" % (str(self.session_id), self.touch_time)
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class SessionManager(object):
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"""
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Keeps track of the current active session
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"""
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__current_session = None
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__lock = Lock()
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@staticmethod
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def get():
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"""
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get the active session.
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:return: An active session
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"""
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config = Configuration.get().get('session')
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with SessionManager.__lock:
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if (not SessionManager.__current_session or
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SessionManager.__current_session.expired()):
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SessionManager.__current_session = Session(
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str(uuid4()), expiration_seconds=config.get('ttl', 180))
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LOG.info(
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"New Session Start: " +
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SessionManager.__current_session.session_id)
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return SessionManager.__current_session
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@staticmethod
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def touch():
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"""
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Update the last_touch timestamp on the current session
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:return: None
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"""
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SessionManager.get().touch()
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