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path: root/py/demo/Ice/async/Server.py
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#!/usr/bin/env python
# **********************************************************************
#
# Copyright (c) 2003-2007 ZeroC, Inc. All rights reserved.
#
# This copy of Ice is licensed to you under the terms described in the
# ICE_LICENSE file included in this distribution.
#
# **********************************************************************

import sys, os, traceback, threading, Ice

Ice.loadSlice('Hello.ice')
import Demo

class CallbackEntry(object):
    def __init__(self, cb, delay):
	self.cb = cb
        self.delay = delay

class WorkQueue(threading.Thread):
    def __init__(self):
        threading.Thread.__init__(self)
	self._callbacks = []
	self._done = False
	self._cond = threading.Condition()

    def run(self):
        self._cond.acquire()

	try:
	    while not self._done:
	        if len(self._callbacks) == 0:
	            self._cond.wait()

	        if not len(self._callbacks) == 0:
	            self._cond.wait(self._callbacks[0].delay / 1000.0)

		    if not self._done:
		        print "Belated Hello World!"
		        self._callbacks[0].cb.ice_response()
		        del self._callbacks[0]

	    for i in range(0, len(self._callbacks)):
	        self._callbacks[i].cb.ice_exception(Demo.RequestCanceledException())
	finally:
	    self._cond.release()

    def add(self, cb, delay):
        self._cond.acquire()

	try:
	    if not self._done:
	        entry = CallbackEntry(cb, delay)
	        if len(self._callbacks) == 0:
	            self._cond.notify()
		self._callbacks.append(entry)
	    else:
	       cb.ice_exception(Demo.RequestCanceledException())
	finally:
	    self._cond.release()

    def destroy(self):
        self._cond.acquire()

	try:
	    self._done = True
	    self._cond.notify()
	finally:
	    self._cond.release()

class HelloI(Demo.Hello):
    def __init__(self, workQueue):
	self._workQueue = workQueue

    def sayHello_async(self, cb, delay, current=None):
        if delay == 0:
	    print "Hello World!"
	    cb.ice_response()
	else:
	    self._workQueue.add(cb, delay)

    def shutdown(self, current=None):
        self._workQueue.destroy()
	self._workQueue.join()

	current.adpater.getCommunicator().shutdown();

class Server(Ice.Application):
    def run(self, args):
        self.callbackOnInterrupt()

	adapter = self.communicator().createObjectAdapter("Hello")
	self._workQueue = WorkQueue()
	adapter.add(HelloI(self._workQueue), self.communicator().stringToIdentity("hello"))
	
	self._workQueue.start()
	adapter.activate()
	
	self.communicator().waitForShutdown()
	return True

    def interruptCallback(self, sig):
        self._workQueue.destroy()
	self._workQueue.join()

	try:
	    self._communicator.destroy()
	except:
	    traceback.print_exc()

app = Server()
sys.exit(app.main(sys.argv, "config.server"))