ascendhuawei
210 lines
7.4 KiB
Python
210 lines
7.4 KiB
Python
# =======================================================================
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#
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# Copyright (C) 2018, Hisilicon Technologies Co., Ltd. All Rights Reserved.
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#
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# Redistribution and use in source and binary forms, with or without
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# modification, are permitted provided that the following conditions are met:
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#
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# 1 Redistributions of source code must retain the above copyright notice,
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# this list of conditions and the following disclaimer.
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#
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# 2 Redistributions in binary form must reproduce the above copyright notice,
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# this list of conditions and the following disclaimer in the documentation
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# and/or other materials provided with the distribution.
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#
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# 3 Neither the names of the copyright holders nor the names of the
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# contributors may be used to endorse or promote products derived from this
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# software without specific prior written permission.
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#
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# THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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# AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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# IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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# ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE
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# LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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# CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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# SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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# INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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# CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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# ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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# POSSIBILITY OF SUCH DAMAGE.
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# =======================================================================
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#
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"""presenter app manager module"""
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import time
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import threading
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import logging
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from common.channel_manager import ChannelManager
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# Heartbeat timeout, exceeding the limit, the socket will disconnect
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HEARTBEAT_TIMEOUT = 100
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class App():
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'''App class, When receive an app request from
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Presenter Agent, creat an object.
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'''
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def __init__(self, app_id, conn=None):
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self.app_id = app_id
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self.heartbeat = time.time()
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self.socket_fd = conn.fileno()
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# set timeout 1 second
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conn.settimeout(1)
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self.socket = conn
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self.frame_num_dict = {}
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class AppManager():
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'''A class provides app management features'''
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__instance = None
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channel_manager = None
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app_list_lock = threading.Lock()
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app_list = []
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thread_switch = False
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def __init__(self):
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"""init func"""
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def __new__(cls):
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"""ensure only a single instance created. """
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if cls.__instance is None:
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cls.__instance = object.__new__(cls)
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cls.channel_manager = ChannelManager([])
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cls._create_thread()
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return cls.__instance
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@classmethod
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def _create_thread(cls):
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"""_create_thread."""
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thread = threading.Thread(target=cls._app_thread)
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thread.start()
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@classmethod
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def _app_thread(cls):
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"""background thread to process video"""
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logging.info('create app manager thread')
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while True:
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if cls.thread_switch:
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break
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for i in range(len(cls.app_list)):
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if time.time() - cls.app_list[i].heartbeat > HEARTBEAT_TIMEOUT:
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app_id = cls.app_list[i].app_id
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cls.channel_manager.unregister_one_channel(app_id)
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del cls.app_list[i]
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logging.info("unregister app: %s", app_id)
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time.sleep(1)
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def set_thread_switch(self):
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AppManager.thread_switch = True
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def register_app(self, app_id, socket):
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"""
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API for registering an app
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Args:
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app_id: app id, must be globally unique
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socket: a socket communicating with the app
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"""
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with self.app_list_lock:
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for i in range(len(self.app_list)):
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if self.app_list[i].app_id == app_id:
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return False
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app = App(app_id, socket)
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self.app_list.append(app)
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self.channel_manager.register_one_channel(app_id)
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logging.info("register app: %s", app_id)
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return True
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def unregister_app_by_fd(self, sock_fileno):
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"""
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API for unregistering an app
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Args:
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sock_fileno: sock_fileno is binded to an app.
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Through it, find the app and delete it.
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"""
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with self.app_list_lock:
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for i in range(len(self.app_list)):
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if self.app_list[i].socket_fd == sock_fileno:
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app_id = self.app_list[i].app_id
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self.channel_manager.unregister_one_channel(app_id)
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del self.app_list[i]
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logging.info("unregister app: %s", app_id)
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break
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def get_socket_by_app_id(self, app_id):
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"""
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API for finding an app
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Args:
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app_id: the id of an app.
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"""
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with self.app_list_lock:
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for i in range(len(self.app_list)):
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if self.app_list[i].app_id == app_id:
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return self.app_list[i].socket
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return None
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def get_app_id_by_socket(self, sock_fd):
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"""
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API for get app id by socket
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Args:
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sock_fd: sock_fd is binded to an app.
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Through it, find the app and delete it.
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"""
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with self.app_list_lock:
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for i in range(len(self.app_list)):
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if self.app_list[i].socket_fd == sock_fd:
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return self.app_list[i].app_id
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return None
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def is_app_exist(self, app_id):
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"""
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API for checking if the app exist
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Args:
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app_id: the id of an app.
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"""
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with self.app_list_lock:
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for i in range(len(self.app_list)):
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if self.app_list[i].app_id == app_id:
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return True
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return False
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def get_app_num(self):
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"""
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API for getting the number of apps
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Args: NA
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"""
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with self.app_list_lock:
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return len(self.app_list)
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def set_heartbeat(self, sock_fileno):
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with self.app_list_lock:
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for i in range(len(self.app_list)):
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if self.app_list[i].socket_fd == sock_fileno:
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self.app_list[i].heartbeat = time.time()
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def increase_frame_num(self, app_id, channel_id):
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with self.app_list_lock:
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for i in range(len(self.app_list)):
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if self.app_list[i].app_id == app_id:
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if channel_id in self.app_list[i].frame_num_dict:
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self.app_list[i].frame_num_dict[channel_id] += 1
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else:
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self.app_list[i].frame_num_dict[channel_id] = 1
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def get_frame_num(self, app_id, channel_id):
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with self.app_list_lock:
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for i in range(len(self.app_list)):
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if self.app_list[i].app_id == app_id:
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if channel_id in self.app_list[i].frame_num_dict:
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return self.app_list[i].frame_num_dict[channel_id]
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else:
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return 0
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return 0
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def list_app(self):
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"""
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API for listing all apps
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Args: NA
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"""
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with self.app_list_lock:
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return [self.app_list[i].app_id for i in range(len(self.app_list))]
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