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service.py
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service.py
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# Copyright (C) 2022: GP Orcullo
#
# See COPYING file for copyrights details.
#
# This program is free software; you can redistribute it and/or
# modify it under the terms of the GNU General Public License
# as published by the Free Software Foundation; either version 2
# of the License, or (at your option) any later version.
#
# This program is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with this program; if not, write to the Free Software
# Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
import argparse
import threading
import sys
import Pyro5
from Pyro5.server import expose, Daemon
from pubsub import pub
import wx
import wx.adv
from runtime import default_evaluator, MainWorker, PlcStatus
from runtime.PLCObject import PLCObject
import util.paths as paths
ROOT = paths.AbsDir(__file__)
TRAY_TOOLTIP = 'PLCOpen Service'
TRAY_ICON = f'{ROOT}/images/brz.png'
TRAY_START_ICON = f'{ROOT}/images/icoplay24.png'
TRAY_STOP_ICON = f'{ROOT}/images/icostop24.png'
Pyro5.config.SERPENT_BYTES_REPR = True
[ITEM_PLC_START, ITEM_PLC_STOP, ITEM_EXIT] = range(3)
ITEM_PLC_STATE = {
PlcStatus.Started: ('Stop PLC', ITEM_PLC_START, TRAY_START_ICON),
PlcStatus.Stopped: ('Start PLC', ITEM_PLC_STOP, TRAY_STOP_ICON),
}
class PLCOpenTaskBar(wx.adv.TaskBarIcon):
def __init__(self, frame):
super().__init__()
self.myapp_frame = frame
self.set_icon(TRAY_ICON)
self.Bind(wx.adv.EVT_TASKBAR_LEFT_DOWN, frame.on_left_down)
self.plcstate = PlcStatus.Empty
pub.subscribe(self.set_plcstate, 'plc state')
def _create_menu_item(self, menu, label, id=None):
item = wx.MenuItem(menu, -1, label)
menu.Bind(wx.EVT_MENU, lambda e: self.on_menu(e, id), id=item.GetId())
menu.Append(item)
return item
def CreatePopupMenu(self):
menu = wx.Menu()
if self.plcstate in (PlcStatus.Started, PlcStatus.Stopped):
a, b, _ = ITEM_PLC_STATE[self.plcstate]
self._create_menu_item(menu, a, id=b)
menu.AppendSeparator()
self._create_menu_item(menu, 'Exit', id=ITEM_EXIT)
return menu
def set_icon(self, path):
icon = wx.Icon(wx.Bitmap(path))
self.SetIcon(icon, TRAY_TOOLTIP)
def on_menu(self, e, i):
if i in (ITEM_PLC_START, ITEM_PLC_STOP):
pub.sendMessage('set plc', state=(i == ITEM_PLC_STOP))
if i == ITEM_EXIT:
self.myapp_frame.Close()
def set_plcstate(self, state):
self.plcstate = state
if state in (PlcStatus.Started, PlcStatus.Stopped):
_, _, i = ITEM_PLC_STATE[state]
self.set_icon(i)
else:
self.set_icon(TRAY_ICON)
class PLCOpenService(wx.Frame):
def __init__(self):
super().__init__(None, size=(1, 1))
panel = wx.Panel(self)
self.tb = PLCOpenTaskBar(self)
self.Bind(wx.EVT_CLOSE, self.onClose)
def onClose(self, evt):
self.tb.RemoveIcon()
self.tb.Destroy()
wx.CallAfter(self.Destroy)
def on_left_down(self, evt):
self.tb.PopupMenu(self.tb.CreatePopupMenu())
class PLCObjectAdapter(PLCObject):
@expose
def AppendChunkToBlob(self, *args, **kwargs):
return super().AppendChunkToBlob(*args, **kwargs)
@expose
def GetLogMessage(self, *args, **kwargs):
return super().GetLogMessage(*args, **kwargs)
@expose
def GetPLCID(self, *args, **kwargs):
return super().GetPLCID(*args, **kwargs)
@expose
def GetPLCstatus(self, *args, **kwargs):
return super().GetPLCstatus(*args, **kwargs)
@expose
def GetTraceVariables(self, *args, **kwargs):
return super().GetTraceVariables(*args, **kwargs)
@expose
def MatchMD5(self, *args, **kwargs):
return super().MatchMD5(*args, **kwargs)
@expose
def NewPLC(self, *args, **kwargs):
return super().NewPLC(*args, **kwargs)
@expose
def PurgeBlobs(self, *args, **kwargs):
return super().PurgeBlobs(*args, **kwargs)
@expose
def RemoteExec(self, *args, **kwargs):
return super().RemoteExec(*args, **kwargs)
@expose
def RepairPLC(self, *args, **kwargs):
return super().RepairPLC(*args, **kwargs)
@expose
def ResetLogCount(self, *args, **kwargs):
return super().ResetLogCount(*args, **kwargs)
@expose
def SeedBlob(self, *args, **kwargs):
return super().SeedBlob(*args, **kwargs)
@expose
def SetTraceVariablesList(self, *args, **kwargs):
return super().SetTraceVariablesList(*args, **kwargs)
@expose
def StartPLC(self, *args, **kwargs):
return super().StartPLC(*args, **kwargs)
@expose
def StopPLC(self, *args, **kwargs):
return super().StopPLC(*args, **kwargs)
def stdout_write(msg):
sys.stdout.write(msg)
sys.stdout.flush()
class PyroDaemon(threading.Thread):
def __init__(self, host, port, wdir, evaluator, event):
super().__init__()
self.event = event
self.uri = None
self.plcobj = None
self.argv = []
self.evaluator = evaluator
self.host = host
self.port = port
self.rtvars = {}
self.wdir = wdir
self.pyro_daemon = None
pub.subscribe(self.set_plc, 'set plc')
def run(self):
self.pyro_daemon = Daemon(host=self.host, port=self.port)
self.plcobj = PLCObjectAdapter(self.wdir, self.argv,
[lambda m: pub.sendMessage("plc state",
state=m)],
self.evaluator,
self.rtvars)
self.uri = self.pyro_daemon.register(self.plcobj, 'PLCObject')
self.event.set()
stdout_write(f'Pyro port : {str(self.uri).split(":")[-1]}\n'
f'Current working directory : {self.wdir}\n')
self.pyro_daemon.requestLoop()
stdout_write('Pyro: thread terminated.\n')
def shutdown(self):
stdout_write('Pyro: shutting down ...\n')
self.pyro_daemon.shutdown()
def set_plc(self, state):
if state:
self.plcobj.StartPLC()
else:
self.plcobj.StopPLC()
class MainWorkerDaemon(threading.Thread):
def __init__(self, host, port, wdir, evaluator):
super().__init__()
self.event = threading.Event()
self.pyro_daemon = PyroDaemon(host, port, wdir, evaluator, self.event)
self.pyro_daemon.daemon = True
def run(self):
MainWorker.runloop(self.start_pyro)
stdout_write('MainWorker: thread terminated.\n')
def start_pyro(self):
self.pyro_daemon.start()
self.event.wait()
self.pyro_daemon.plcobj.AutoLoad(0)
def shutdown(self):
self.pyro_daemon.shutdown()
self.pyro_daemon.join()
stdout_write('MainWorker: shutting down ...\n')
MainWorker.finish()
if __name__ == '__main__':
parser = argparse.ArgumentParser()
parser.add_argument('-p', type=int, default=0, help='listen on port')
parser.add_argument('-i', help='listen on address')
parser.add_argument('-x', type=int, default=1,
choices=[0, 1],
help='enable GUI (0=disabled)')
parser.add_argument('tmpdir',
help='temporary location for PLC files')
args = parser.parse_args()
if args.x:
app = wx.App()
PLCOpenService()
pyro_thread = MainWorkerDaemon(
args.i, args.p, args.tmpdir, default_evaluator)
pyro_thread.daemon = True
pyro_thread.start()
pyro_thread.event.wait()
if args.x:
app.MainLoop()
else:
try:
pyro_thread.join()
except (KeyboardInterrupt, SystemExit):
stdout_write('\nExiting...\n')
pyro_thread.shutdown()