from phonon import get_logger, PHONON_NAMESPACE, TTL
import time
import phonon.lock
import phonon.nodelist
import phonon.connections
logger = get_logger(__name__)
class Reference(object):
"""
Represents a reference to some resource in the network. Handles reference
counting, dereferencing, locking/ownership, and maintaining whether or not
resources were externally modified.
This class also provides a layer of abstraction on failover and cleanup. In
the event of total process failure; a reference on that process will expire
and be subsequently detected/recovered by this class to the extent updates
overlap.
More in-depth:
When a process acquires a `Reference` to a resource it attempts to lock
that resource. It will block by default for a total of Process.BLOCKING_TIMEOUT
seconds (defaults to 500s) before raising a Reference.AlreadyLocked
exception
That process/reference will attempt to connect to the backend, and retry
until either successful completion of the task or python's maximum
import time
import uuid
import tornado.ioloop
import collections
from phonon import get_logger, PHONON_NAMESPACE
import phonon.client
import phonon.event
logger = get_logger(__name__)
connection = None
def get_ms():
return int(time.time() * 1000.)
def s_to_ms(s):
return int(s * 1000.)
class AsyncConn(phonon.event.EventMixin):
HEARTBEAT_INTERVAL = 30 # Seconds
HEARTBEAT_KEY = '{}.heartbeat'.format(phonon.PHONON_NAMESPACE)
PROCESS_TTL = phonon.TTL * 0.5
def __init__(self, redis_hosts, port=6379, db=1, ioloop=None):
super(AsyncConn, self).__init__()