Python Interpreter.mainEventLoop方法代码示例

# 需要导入模块: from interpreter import Interpreter [as 别名]
# 或者: from interpreter.Interpreter import mainEventLoop [as 别名]

#.........这里部分代码省略.........
#    def setIOProcessors(self, dm):
#        dm["_ioprocessors"] = {"scxml" : {"location" : dm["_x"]["self"]},
#                                    "basichttp" : {"location" : dm["_x"]["self"]} }    
    
    
    def _open_document(self, uri):
        if hasattr(uri, "read"):
            return uri.read()
        elif isinstance(uri, basestring) and re.search("<(.+:)?scxml", uri): #"<scxml" in uri:
            self.filename = "<string source>"
            self.filedir = None
            return uri
        else:
            path, search_path = get_path(uri, self.filedir or "")
            if path:
                self.filedir, self.filename = os.path.split(os.path.abspath(path))
                return open(path).read()
            else:
                msg = "No such file on the PYSCXMLPATH"
                self.logger.error(msg + ": '%s'" % uri)
                self.logger.error("PYTHONPATH: '%s'" % search_path)
                raise IOError(errno.ENOENT, msg, uri)
    
    def _start(self):
        self.compiler.instantiate_datamodel()
        self.interpreter.interpret(self.doc)
    
    def _start_invoke(self, invokeid=None):
        self.compiler.instantiate_datamodel()
        self.interpreter.interpret(self.doc, invokeid)
    
    
    def start(self):
        '''Takes the statemachine to its initial state'''
        if not self.interpreter.running:
            raise RuntimeError("The StateMachine instance may only be started once.")
        else:
            doc = os.path.join(self.filedir, self.filename) if self.filedir else ""
            self.logger.info("Starting %s" % doc)
        self._start()
        self.interpreter.mainEventLoop()
    
    def start_threaded(self):
        self._start()
        eventlet.spawn(self.interpreter.mainEventLoop)
        eventlet.greenthread.sleep()
        
    def isFinished(self):
        '''Returns True if the statemachine has reached it 
        top-level final state or was cancelled.'''
        return self.is_finished
    
    def cancel(self):
        '''
        Stops the execution of the StateMachine, causing 
        all the states in the current configuration to execute 
        their onexit blocks. The StateMachine instance now no longer
        accepts events. For clarity, consider using the 
        top-level <final /> state in your document instead.  
        '''
        self.interpreter.running = False
        self.interpreter.externalQueue.put(Event("cancel.invoke.%s" % self.datamodel.get("_sessionid")))
    
    def send(self, name, data={}):
        '''
        Send an event to the running machine. 
        @param name: the event name (string)
        @param data: the data passed to the _event.data variable (any data type)
        '''
        self._send(name, data)
        eventlet.greenthread.sleep()
            
    def _send(self, name, data={}, invokeid = None, toQueue = None):
        self.interpreter.send(name, data, invokeid, toQueue)
        
    def In(self, statename):
        '''
        Checks if the state 'statename' is in the current configuration,
        (i.e if the StateMachine instance is currently 'in' that state).
        '''
        return self.interpreter.In(statename)
            
    
    def on_exit(self, sender, final):
        if sender is self.interpreter:
            self.is_finished = True
            for timer in self.compiler.timer_mapping.values():
                eventlet.greenthread.cancel(timer)
                del timer
            dispatcher.disconnect(self, "signal_exit", self.interpreter)
            dispatcher.send("signal_exit", self, final=final)
    
    
    def __enter__(self):
        self.start_threaded()
        return self
    
    def __exit__(self, exc_type, exc_value, traceback):
        if not self.isFinished():
            self.cancel()