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#!/usr/bin/env python
# **********************************************************************
#
# Copyright (c) 2003-2010 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, time, traceback, threading, Ice
Ice.loadSlice('Session.ice')
import Demo
class HelloI(Demo.Hello):
def __init__(self, name, id):
self._name = name
self._id = id
def sayHello(self, c):
print "Hello object #" + str(self._id) + " for session `" + self._name + "' says:\n" + \
"Hello " + self._name + "!"
class SessionI(Demo.Session):
def __init__(self, name):
self._timestamp = time.time()
self._name = name
self._lock = threading.Lock()
self._destroy = False # true if destroy() was called, false otherwise.
self._nextId = 0 # The id of the next hello object. This is used for tracing purposes.
self._objs = [] # List of per-client allocated Hello objects.
print "The session " + self._name + " is now created."
def createHello(self, c):
self._lock.acquire()
try:
if self._destroy:
raise Ice.ObjectNotExistException()
hello = Demo.HelloPrx.uncheckedCast(c.adapter.addWithUUID(HelloI(self._name, self._nextId)))
self._nextId = self._nextId + 1
self._objs.append(hello)
return hello
finally:
self._lock.release()
def refresh(self, c):
self._lock.acquire()
try:
if self._destroy:
raise Ice.ObjectNotExistException()
self._timestamp = time.time()
finally:
self._lock.release()
def getName(self, c):
self._lock.acquire()
try:
if self._destroy:
raise Ice.ObjectNotExistException()
return self._name
finally:
self._lock.release()
def destroy(self, c):
self._lock.acquire()
try:
if self._destroy:
raise Ice.ObjectNotExistException()
self._destroy = True
print "The session " + self._name + " is now destroyed."
try:
c.adapter.remove(c.id)
for p in self._objs:
c.adapter.remove(p.ice_getIdentity())
except Ice.ObjectAdapterDeactivatedException, ex:
# This method is called on shutdown of the server, in
# which case this exception is expected.
pass
self._objs = []
finally:
self._lock.release()
def timestamp(self):
self._lock.acquire()
try:
if self._destroy:
raise Ice.ObjectNotExistException()
return self._timestamp
finally:
self._lock.release()
class SessionProxyPair:
def __init__(self, p, s):
self.proxy = p
self.session = s
class ReapThread(threading.Thread):
def __init__(self):
threading.Thread.__init__(self)
self._timeout = 10
self._terminated = False
self._cond = threading.Condition()
self._sessions = []
def run(self):
self._cond.acquire()
try:
while not self._terminated:
self._cond.wait(1)
if not self._terminated:
for p in self._sessions:
try:
#
# Session destruction may take time in a
# real-world example. Therefore the current time
# is computed for each iteration.
#
if (time.time() - p.session.timestamp()) > self._timeout:
name = p.proxy.getName()
p.proxy.destroy()
print "The session " + name + " has timed out."
self._sessions.remove(p)
except Ice.ObjectNotExistException:
self._sessions.remove(p)
finally:
self._cond.release()
def terminate(self):
self._cond.acquire()
try:
self._terminated = True
self._cond.notify()
self._sessions = []
finally:
self._cond.release()
def add(self, proxy, session):
self._cond.acquire()
try:
self._sessions.append(SessionProxyPair(proxy, session))
finally:
self._cond.release()
class SessionFactoryI(Demo.SessionFactory):
def __init__(self, reaper):
self._reaper = reaper
self._lock = threading.Lock()
def create(self, name, c):
self._lock.acquire()
try:
session = SessionI(name)
proxy = Demo.SessionPrx.uncheckedCast(c.adapter.addWithUUID(session))
self._reaper.add(proxy, session)
return proxy
finally:
self._lock.release()
def shutdown(self, c):
print "Shutting down..."
c.adapter.getCommunicator().shutdown()
class Server(Ice.Application):
def run(self, args):
if len(args) > 1:
print self.appName() + ": too many arguments"
return 1
adapter = self.communicator().createObjectAdapter("SessionFactory")
reaper = ReapThread()
reaper.start()
try:
adapter.add(SessionFactoryI(reaper), self.communicator().stringToIdentity("SessionFactory"))
adapter.activate()
self.communicator().waitForShutdown()
finally:
reaper.terminate()
reaper.join()
return 0
app = Server()
sys.exit(app.main(sys.argv, "config.server"))
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