openwebrx-clone/owrx/client.py

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from owrx.config import PropertyManager
from owrx.metrics import Metrics, DirectMetric
import threading
import logging
logger = logging.getLogger(__name__)
class TooManyClientsException(Exception):
pass
class ClientRegistry(object):
sharedInstance = None
creationLock = threading.Lock()
@staticmethod
def getSharedInstance():
with ClientRegistry.creationLock:
if ClientRegistry.sharedInstance is None:
ClientRegistry.sharedInstance = ClientRegistry()
return ClientRegistry.sharedInstance
def __init__(self):
self.clients = []
Metrics.getSharedInstance().addMetric("openwebrx.users", DirectMetric(self.clientCount))
super().__init__()
def broadcast(self):
n = self.clientCount()
for c in self.clients:
c.write_clients(n)
def addClient(self, client):
pm = PropertyManager.getSharedInstance()
if len(self.clients) >= pm["max_clients"]:
raise TooManyClientsException()
self.clients.append(client)
self.broadcast()
def clientCount(self):
return len(self.clients)
def removeClient(self, client):
try:
self.clients.remove(client)
except ValueError:
pass
self.broadcast()