##############################################################################
#
# Copyright (c) 2001 Zope Corporation and Contributors. All Rights Reserved.
# 
# This software is subject to the provisions of the Zope Public License,
# Version 2.0 (ZPL).  A copy of the ZPL should accompany this distribution.
# THIS SOFTWARE IS PROVIDED "AS IS" AND ANY AND ALL EXPRESS OR IMPLIED
# WARRANTIES ARE DISCLAIMED, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED
# WARRANTIES OF TITLE, MERCHANTABILITY, AGAINST INFRINGEMENT, AND FITNESS
# FOR A PARTICULAR PURPOSE
# 
##############################################################################
import sys, os, time
if __name__ == "__main__":
    sys.path.insert(0, '../../..')
    #os.chdir('../../..')
from Testing import makerequest
import ZODB # in order to get Persistence.Persistent working
import Acquisition
from Acquisition import aq_base
from Products.Sessions.BrowserIdManager import BrowserIdManager
from Products.Sessions.SessionDataManager import \
    SessionDataManager, SessionDataManagerErr
from Products.Transience.Transience import \
    TransientObjectContainer, TransientObject
from Products.TemporaryFolder.TemporaryFolder import MountedTemporaryFolder
from ZODB.POSException import InvalidObjectReference, ConflictError
from DateTime import DateTime
from unittest import TestCase, TestSuite, TextTestRunner, makeSuite
import time, threading, random
from cPickle import UnpickleableError
from ZODB.DemoStorage import DemoStorage
from OFS.Application import Application
import sys
sys.setcheckinterval(200)

tf_name = 'temp_folder'
idmgr_name = 'browser_id_manager'
toc_name = 'temp_transient_container'

stuff = {}

def _getDB():
    db = stuff.get('db')
    if not db:
        ds = DemoStorage(quota=(1<<20))
        db = ZODB.DB(ds, pool_size=60)
        conn = db.open()
        root = conn.root()
        app = Application()
        root['Application']= app
        _populate(app)
        get_transaction().commit()
        stuff['db'] = db
        conn.close()
    return db

def _delDB():
    get_transaction().abort()
    del stuff['db']

class Foo(Acquisition.Implicit): pass

def _populate(app):
    bidmgr = BrowserIdManager(idmgr_name)
    tf = MountedTemporaryFolder(tf_name, title="Temporary Folder")
    toc = TransientObjectContainer(toc_name, title='Temporary '
        'Transient Object Container', timeout_mins=20)
    session_data_manager=SessionDataManager(id='session_data_manager',
        path='/'+tf_name+'/'+toc_name, title='Session Data Manager')

    try: app._delObject(idmgr_name)
    except AttributeError: pass

    try: app._delObject(tf_name)
    except AttributeError: pass

    try: app._delObject('session_data_manager')
    except AttributeError: pass

    app._setObject(idmgr_name, bidmgr)

    app._setObject('session_data_manager', session_data_manager)

    app._setObject(tf_name, tf)
    get_transaction().commit()

    app.temp_folder._setObject(toc_name, toc)
    get_transaction().commit()

class TestMultiThread(TestCase):
    def testNonOverlappingBrowserIds(self):
        readers = []
        writers = []
        readiters = 20
        writeiters = 5
        readout = []
        writeout = []
        numreaders = 20
        numwriters = 5
        sdm_name = 'session_data_manager'
        db = _getDB()
        for i in range(numreaders):
            thread = ReaderThread(db, readiters, sdm_name)
            readers.append(thread)
        for i in range(numwriters):
            thread = WriterThread(db, writeiters, sdm_name)
            writers.append(thread)
        for thread in readers:
            thread.start()
            time.sleep(0.1)
        for thread in writers:
            thread.start()
            time.sleep(0.1)
        while threading.activeCount() > 1:
            time.sleep(1)
        
        for thread in readers:
            assert thread.out == [], thread.out

    def testOverlappingBrowserIds(self):
        readers = []
        writers = []
        readiters = 20
        writeiters = 5
        readout = []
        writeout = []
        numreaders = 20
        numwriters = 5
        sdm_name = 'session_data_manager'
        db = _getDB()
        for i in range(numreaders):
            thread = ReaderThread(db, readiters, sdm_name)
            readers.append(thread)
        for i in range(numwriters):
            thread = WriterThread(db, writeiters, sdm_name)
            writers.append(thread)
        for thread in readers:
            thread.start()
            time.sleep(0.1)
        for thread in writers:
            thread.start()
            time.sleep(0.1)
        while threading.activeCount() > 1:
            time.sleep(1)
        
        for thread in readers:
            assert thread.out == [], thread.out

class BaseReaderWriter(threading.Thread):
    def __init__(self, db, iters, sdm_name):
        self.conn = db.open()
        self.app = self.conn.root()['Application']
        self.app = makerequest.makerequest(self.app)
        token = self.app.browser_id_manager._getNewBrowserId()
        self.app.REQUEST.browser_id_ = token
        self.iters = iters
        self.sdm_name = sdm_name
        self.out = []
        threading.Thread.__init__(self)

    def run(self):
        i = 0
        try:
            while 1:
                try:
                    self.run1()
                    return
                except ConflictError:
                    i = i + 1
                    #print "conflict %d" % i
                    if i > 3: raise
        finally:
            self.conn.close()
            del self.app
            
class ReaderThread(BaseReaderWriter):
    def run1(self):
        session_data_manager = getattr(self.app, self.sdm_name)
        data = session_data_manager.getSessionData(create=1)
        t = time.time()
        data[t] = 1
        get_transaction().commit()
        for i in range(self.iters):
            data = session_data_manager.getSessionData()
            if not data.has_key(t):
                self.out.append(1)
            time.sleep(random.choice(range(3)))
            get_transaction().commit()

class WriterThread(BaseReaderWriter):
    def run1(self):
        session_data_manager = getattr(self.app, self.sdm_name)
        for i in range(self.iters):
            data = session_data_manager.getSessionData()
            data[time.time()] = 1
            n = random.choice(range(3))
            time.sleep(n)
            if n % 2 == 0:
                get_transaction().commit()
            else:
                get_transaction().abort()

def test_suite():
    test_multithread = makeSuite(TestMultiThread, 'test')
    suite = TestSuite((test_multithread,))
    return suite

if __name__ == '__main__':
    runner = TextTestRunner(verbosity=9, descriptions=9)
    runner.run(test_suite())

