Beremiz_service.py
author greg
Wed, 26 Nov 2008 09:05:04 +0100
changeset 273 d15a20eb2b8b
parent 271 ea7928fd07da
child 290 3bd617ae7a05
permissions -rw-r--r--
Bug with debug mode when displaying code fixed
#!/usr/bin/env python
# -*- coding: utf-8 -*-

#This file is part of Beremiz, a Integrated Development Environment for
#programming IEC 61131-3 automates supporting plcopen standard and CanFestival. 
#
#Copyright (C) 2007: Edouard TISSERANT and Laurent BESSARD
#
#See COPYING file for copyrights details.
#
#This library 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 2.1 of the License, or (at your option) any later version.
#
#This library 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 library; if not, write to the Free Software
#Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA

import os, sys, getopt

def usage():
    print """
Usage of Beremiz PLC execution service :\n
%s {[-n name] [-i ip] [-p port] [-x enabletaskbar]|-h|--help} working_dir
           -n        - zeroconf service name
           -i        - ip of interface to bind to (x.x.x.x)
           -p        - port number
           -h        - print this help text and quit
           -x        - enable/disable wxTaskbarIcon (0:disable 1:enable)
           
           working_dir - directory where are stored PLC files
"""%sys.argv[0]

try:
    opts, args = getopt.getopt(sys.argv[1:], "i:p:n:x:h")
except getopt.GetoptError, err:
    # print help information and exit:
    print str(err) # will print something like "option -a not recognized"
    usage()
    sys.exit(2)

# default values
ip = ""
port = 3000
name = os.environ[{
     "linux2":"USER",
     "win32":"USERNAME",
     }.get(sys.platform, "USER")]
enablewx = True
havewx = False

for o, a in opts:
    if o == "-h":
        usage()
        sys.exit()
    elif o == "-i":
        if len(a.split(".")) == 4 or a == "localhost":
            ip = a
    elif o == "-p":
        # port: port that the service runs on
        port = int(a)
    elif o == "-n":
        name = a
    elif o == "-x":
        enablewx = int(a)
    else:
        usage()
        sys.exit()

if len(args) > 1:
    usage()
    sys.exit()
elif len(args) == 1:
    WorkingDir = args[0]
elif len(args) == 0:
    WorkingDir = os.getcwd()
    args=[WorkingDir]

if enablewx:
    try:
        import wx, re
        from wx.lib.embeddedimage import PyEmbeddedImage
        from threading import Thread
        from types import *
        havewx = True
    except:
        havewx = False

    if havewx:
        defaulticon = PyEmbeddedImage(
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        #----------------------------------------------------------------------
        starticon = PyEmbeddedImage(
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        #----------------------------------------------------------------------
        stopicon = PyEmbeddedImage(
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    class ParamsEntryDialog(wx.TextEntryDialog):
        if wx.VERSION < (2, 6, 0):
            def Bind(self, event, function, id = None):
                if id is not None:
                    event(self, id, function)
                else:
                    event(self, function)
        
    
        def __init__(self, parent, message, caption = "Please enter text", defaultValue = "", 
                           style = wx.OK|wx.CANCEL|wx.CENTRE, pos = wx.DefaultPosition):
            wx.TextEntryDialog.__init__(self, parent, message, caption, defaultValue, style, pos)
            
            self.Tests = []
            if wx.VERSION >= (2, 8, 0):
                self.Bind(wx.EVT_BUTTON, self.OnOK, id=self.GetAffirmativeId())
            elif wx.VERSION >= (2, 6, 0):
                self.Bind(wx.EVT_BUTTON, self.OnOK, id=self.GetSizer().GetItem(3).GetSizer().GetAffirmativeButton().GetId())
            else:
                self.Bind(wx.EVT_BUTTON, self.OnOK, id=self.GetSizer().GetItem(3).GetSizer().GetChildren()[0].GetSizer().GetChildren()[0].GetWindow().GetId())
        
        def OnOK(self, event):
            value = self.GetValue()
            texts = {"value" : value}
            for function, message in self.Tests:
                if not function(value):
                    message = wx.MessageDialog(self, message%texts, "Error", wx.OK|wx.ICON_ERROR)
                    message.ShowModal()
                    message.Destroy()
                    return
            self.EndModal(wx.ID_OK)
        
        def GetValue(self):
            return self.GetSizer().GetItem(1).GetWindow().GetValue()
        
        def SetTests(self, tests):
            self.Tests = tests
            
    class DemoTaskBarIcon(wx.TaskBarIcon):
        TBMENU_CHANGE_NAME = wx.NewId()
        TBMENU_CHANGE_PORT = wx.NewId()
        TBMENU_CHANGE_INTERFACE = wx.NewId()
        TBMENU_CHANGE_WD = wx.NewId()
        TBMENU_QUIT = wx.NewId()
        
        def __init__(self, pyroserver):
            wx.TaskBarIcon.__init__(self)
            # Set the image
            self.UpdateIcon(None)
    
            # bind some events
            self.Bind(wx.EVT_MENU, self.OnTaskBarChangeName, id=self.TBMENU_CHANGE_NAME)
            self.Bind(wx.EVT_MENU, self.OnTaskBarChangeInterface, id=self.TBMENU_CHANGE_INTERFACE)
            self.Bind(wx.EVT_MENU, self.OnTaskBarChangePort, id=self.TBMENU_CHANGE_PORT)
            self.Bind(wx.EVT_MENU, self.OnTaskBarChangeWorkingDir, id=self.TBMENU_CHANGE_WD)
            self.Bind(wx.EVT_MENU, self.OnTaskBarQuit, id=self.TBMENU_QUIT)
        
        def CreatePopupMenu(self):
            """
            This method is called by the base class when it needs to popup
            the menu for the default EVT_RIGHT_DOWN event.  Just create
            the menu how you want it and return it from this function,
            the base class takes care of the rest.
            """
            menu = wx.Menu()
            menu.Append(self.TBMENU_CHANGE_NAME, "Change Name")
            menu.Append(self.TBMENU_CHANGE_INTERFACE, "Change IP of interface to bind")
            menu.Append(self.TBMENU_CHANGE_PORT, "Change Port Number")
            menu.AppendSeparator()
            menu.Append(self.TBMENU_CHANGE_WD, "Change working directory")
            menu.Append(self.TBMENU_QUIT, "Quit")
            return menu
    
        def MakeIcon(self, img):
            """
            The various platforms have different requirements for the
            icon size...
            """
            if "wxMSW" in wx.PlatformInfo:
                img = img.Scale(16, 16)
            elif "wxGTK" in wx.PlatformInfo:
                img = img.Scale(22, 22)
            # wxMac can be any size upto 128x128, so leave the source img alone....
            icon = wx.IconFromBitmap(img.ConvertToBitmap() )
            return icon
        
        def OnTaskBarChangeInterface(self,evt):
            dlg = ParamsEntryDialog(None, "Enter the ip of the interface to bind", defaultValue=pyroserver.ip)
            dlg.SetTests([(re.compile('\d{1,3}(?:\.\d{1,3}){3}$').match, "Ip is not valid!"),
                           ( lambda ip :len([x for x in ip.split(".") if 0 <= int(x) <= 255]) == 4, "Ip is not valid!")
                           ])
            if dlg.ShowModal() == wx.ID_OK:
                pyroserver.ip = dlg.GetValue()
                pyroserver.Stop()
                
        def OnTaskBarChangePort(self,evt):
            dlg = ParamsEntryDialog(None, "Enter a port number ", defaultValue=str(pyroserver.port))
            dlg.SetTests([(UnicodeType.isdigit, "Port number must be an integer!"), (lambda port : 0 <= int(port) <= 65535 , "Port number must be 0 <= port <= 65535!")])
            if dlg.ShowModal() == wx.ID_OK:
                pyroserver.port = int(dlg.GetValue())
                pyroserver.Stop()
                
        
        def OnTaskBarChangeWorkingDir(self,evt):
            dlg = wx.DirDialog(None, "Choose a working directory ", pyroserver.workdir, wx.DD_NEW_DIR_BUTTON)
            if dlg.ShowModal() == wx.ID_OK:
                pyroserver.workdir = dlg.GetPath()
                pyroserver.Stop()
                
        def OnTaskBarChangeName(self,evt):
            dlg = ParamsEntryDialog(None, "Enter a name ", defaultValue=pyroserver.name)
            dlg.SetTests([(lambda name : len(name) is not 0 , "Name must not be null!")])
            if dlg.ShowModal() == wx.ID_OK:
                pyroserver.name = dlg.GetValue()
                pyroserver.Restart()
    
        def OnTaskBarQuit(self,evt):
            pyroserver.Quit()
            self.RemoveIcon()
            wx.GetApp().ExitMainLoop()
            
        def UpdateIcon(self, plcstatus):
            if plcstatus is "Started" :
                currenticon = self.MakeIcon(starticon.GetImage())
            elif plcstatus is "Stopped":
                currenticon = self.MakeIcon(stopicon.GetImage())
            else:
                currenticon = self.MakeIcon(defaulticon.GetImage())
            self.SetIcon(currenticon, "Beremiz Service")

from runtime import PLCObject, ServicePublisher
import Pyro.core as pyro

if not os.path.isdir(WorkingDir):
    os.mkdir(WorkingDir)

class Server():
    def __init__(self, name, ip, port, workdir, args):
        self.continueloop = True
        self.daemon = None
        self.name = name
        self.ip = ip
        self.port = port
        self.workdir = workdir
        self.args = args
        self.plcobj = None
        self.servicepublisher = None
        self.statuschange = None
    
    def Loop(self, statuschange=None):
        self.statuschange = statuschange
        while self.continueloop:
            self.Start()
        
    def Restart(self):
        self.Stop()

    def Quit(self):
        self.continueloop = False
        self.Stop()

    def Start(self):
        pyro.initServer()
        self.daemon=pyro.Daemon(host=self.ip, port=self.port)
        self.plcobj = PLCObject(self.workdir, self.daemon, self.args, self.statuschange)
        uri = self.daemon.connect(self.plcobj,"PLCObject")
    
        print "The daemon runs on port :",self.port
        print "The object's uri is :",uri
        print "The working directory :",self.workdir
        
        # Configure and publish service
        # Not publish service if localhost in address params
        if self.ip != "localhost" and self.ip != "127.0.0.1":    
            print "Publish service on local network"
            self.servicepublisher = ServicePublisher.ServicePublisher()            
            self.servicepublisher.RegisterService(self.name, self.ip, self.port)
        
        sys.stdout.flush()
        
        self.daemon.requestLoop()
    
    def Stop(self):
        if self.servicepublisher is not None:
            self.servicepublisher.UnRegisterService()
            del self.servicepublisher
        self.daemon.shutdown(True)
        
pyroserver = Server(name, ip, port, WorkingDir, args)

if havewx:
    app=wx.App(redirect=False)
    taskbar_instance = DemoTaskBarIcon(pyroserver)
    def statuschange(status):
        wx.CallAfter(taskbar_instance.UpdateIcon,status)
    pyro_thread=Thread(target=pyroserver.Loop, args=[statuschange])
    pyro_thread.start()
    app.MainLoop()
else:
    pyroserver.Loop()