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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
slice_dir = os.getenv('ICEPY_HOME', '')
if len(slice_dir) == 0 or not os.path.exists(os.path.join(slice_dir, 'slice')):
slice_dir = os.getenv('ICE_HOME', '')
if len(slice_dir) == 0 or not os.path.exists(os.path.join(slice_dir, 'slice')):
slice_dir = os.path.join('/', 'usr', 'share')
if not os.path.exists(os.path.join(slice_dir, 'slice')):
print sys.argv[0] + ': Slice directory not found. Define ICEPY_HOME or ICE_HOME.'
sys.exit(1)
Ice.loadSlice('-I' + slice_dir + '/slice Queue.ice')
import Demo
class Request(object):
def __init__(self, id, cb):
self.id = id
self.cb = cb
class QueueI(Demo.Queue):
def __init__(self):
self._messageQueue = []
self._requestQueue = []
self._lock = threading.Lock()
def get_async(self, cb, id, current=None):
#
# If there is already a message in the message queue, send the
# response immediately. Otherwise add the callback to the
# request queue.
#
self._lock.acquire()
if len(self._messageQueue) != 0:
try:
cb.ice_response(self._messageQueue[0])
del self._messageQueue[0]
except Ice.Exception, ex:
print ex
else:
request = Request(id, cb)
self._requestQueue.append(request)
self._lock.release()
def add(self, message, current=None):
#
# If there is an outstanding request in the request queue,
# send a response. Otherwise add the message to the message
# queue.
#
self._lock.acquire()
if len(self._requestQueue) != 0:
try:
self._requestQueue[0].cb.ice_response(message)
except Ice.Exception, ex:
print ex
del self._requestQueue[0]
else:
self._messageQueue.append(message)
self._lock.release()
def cancel_async(self, cb, ids, current=None):
#
# We send immediate response so that later call to ice_exception
# on queued requests will not cause deadlocks.
#
cb.ice_response()
self._lock.acquire()
for p in ids:
for i in range(0, len(self._requestQueue)):
if self._requestQueue[i].id == p:
try:
self._requestQueue[i].cb.ice_exception(Demo.RequestCanceledException())
except Ice.Exception, ex:
# Ignore
pass
del self._requestQueue[i]
break
self._lock.release()
class Server(Ice.Application):
def run(self, args):
adapter = self.communicator().createObjectAdapter("Queue")
adapter.add(QueueI(), self.communicator().stringToIdentity("queue"))
adapter.activate()
self.communicator().waitForShutdown()
return True
app = Server()
sys.exit(app.main(sys.argv, "config.server"))
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