def __init__(self,
polled_call,
polled_call_args=(),
polling_period=1000,
value_changed_callback=None,
error_callback=None,
compare=True):
self.polled_call_ref = saferef.safe_ref(polled_call)
self.args = polled_call_args
self.polling_period = polling_period
self.value_changed_callback_ref = saferef.safe_ref(
value_changed_callback)
self.error_callback_ref = saferef.safe_ref(error_callback)
self.compare = compare
self.old_res = NotInitializedValue
self.queue = _threading.Queue() # Queue.Queue()
self.delay = 0
self.stop_event = _threading.Event()
self.async_watcher = gevent.get_hub().loop. async ()
def deal_with_job(req, args, kwargs):
def run(req, fn, args, kwargs):
try:
result = fn(*args, **kwargs)
except:
exception, error_string, tb = sys.exc_info()
result = CallException(exception, error_string, tb)
req.set_result(result)
if req.method == "new":
klass = args[0]
args = args[1:]
try:
new_obj = klass(*args, **kwargs)
except:
exception, error_string, tb = sys.exc_info()
result = CallException(exception, error_string, tb)
req.set_result(result)
return
queue = _threading.Queue()
watcher = gevent.get_hub().loop. async ()
watcher.start(functools.partial(read_from_queue, queue))
objs[id(new_obj)] = {
"queue": queue,
"watcher": watcher,
"obj": new_obj
}
req.set_result(new_obj)
elif req.method == "exit":
req.set_result(stop_event.set())
elif callable(req.method):
run(req, req.method, args, kwargs)
else:
obj = objs[req.obj_id]["obj"]
try:
prop = getattr(obj.__class__, req.method)
except AttributeError:
pass
else:
if isinstance(prop, property):
if args: # must be setter
run(req, prop.fset, [obj] + list(args), kwargs)
else:
run(req, prop.fget, [obj], kwargs)
return
try:
method = getattr(obj, req.method)
except AttributeError:
exception, error_string, tb = sys.exc_info()
result = CallException(exception, error_string, tb)
req.set_result(result)
else:
if callable(method):
# method
run(req, method, args, kwargs)
else:
# attribute
if args:
# write
setattr(obj, req.method, args[0])
req.set_result(None)
else:
# read
req.set_result(method)
#
# This file is part of the bliss project
#
# Copyright (c) 2016 Beamline Control Unit, ESRF
# Distributed under the GNU LGPLv3. See LICENSE for more info.
'''Helpers to make TANGO_ & gevent_ work together'''
from gevent import _threading
import threading
import gevent.event
import sys
import atexit
import gevent
import functools
main_queue = _threading.Queue()
gevent_thread_lock = _threading.Lock()
gevent_thread_started = _threading.Event()
gevent_thread = None
GEVENT_THREAD_ID = None
read_event_watcher = None
objs = {}
stop_event = gevent.event.Event()
if not hasattr(gevent, "wait"):
def gevent_wait(timeout=None):
return gevent.run(timeout)
gevent.wait = gevent_wait
