view test/test_schema.py @ 6565:2c2dbfc332ba

Try to handle multiple connections better. The session database is a hot spot. When multiple requests (e.g. 20) come in at the same time session database contention can get great. The original code didn't retry session database access when the open failed. This resulted in errors at the client. The second pass delayed 0.01 seconds and retried. It was better but we still had multiple second stalls. I think the first request got in, everybody else backed up and then retried at the same time. Again they stepped on each other. With logging I would see many counters go all the way to low single digits or to -1 indicating falure. This pass uses randomint to generate delays from 0-.125 seconds in 5ms increments. This performs better in testing. I rarely saw a counter less than 13 (2 failed retries). Current logging starts after 6 failures and counts down until success or failure.
author John Rouillard <rouilj@ieee.org>
date Thu, 16 Dec 2021 20:02:00 -0500
parents f8893e1cde0d
children
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#
# Copyright (c) 2001 Bizar Software Pty Ltd (http://www.bizarsoftware.com.au/)
# This module is free software, and you may redistribute it and/or modify
# under the same terms as Python, so long as this copyright message and
# disclaimer are retained in their original form.
#
# IN NO EVENT SHALL BIZAR SOFTWARE PTY LTD BE LIABLE TO ANY PARTY FOR
# DIRECT, INDIRECT, SPECIAL, INCIDENTAL, OR CONSEQUENTIAL DAMAGES ARISING
# OUT OF THE USE OF THIS CODE, EVEN IF THE AUTHOR HAS BEEN ADVISED OF THE
# POSSIBILITY OF SUCH DAMAGE.
#
# BIZAR SOFTWARE PTY LTD SPECIFICALLY DISCLAIMS ANY WARRANTIES, INCLUDING,
# BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS
# FOR A PARTICULAR PURPOSE.  THE CODE PROVIDED HEREUNDER IS ON AN "AS IS"
# BASIS, AND THERE IS NO OBLIGATION WHATSOEVER TO PROVIDE MAINTENANCE,
# SUPPORT, UPDATES, ENHANCEMENTS, OR MODIFICATIONS.

import unittest, os, shutil

from roundup import configuration
from roundup.backends import back_anydbm
from roundup.hyperdb import String, Password, Link, Multilink, Date, \
    Interval

config = configuration.CoreConfig()
config.DATABASE = "_test_dir"

class SchemaTestCase(unittest.TestCase):
    def setUp(self):
        # remove previous test, ignore errors
        if os.path.exists(config.DATABASE):
            shutil.rmtree(config.DATABASE)
        os.makedirs(config.DATABASE + '/files')
        self.db = back_anydbm.Database(config, 'admin')
        self.db.post_init()
        self.db.clear()

    def tearDown(self):
        self.db.close()
        shutil.rmtree(config.DATABASE)

    def testA_Status(self):
        status = back_anydbm.Class(self.db, "status", name=String())
        self.assertTrue(status, 'no class object generated')
        status.setkey("name")
        val = status.create(name="unread")
        self.assertEqual(val, '1', 'expecting "1"')
        val = status.create(name="in-progress")
        self.assertEqual(val, '2', 'expecting "2"')
        val = status.create(name="testing")
        self.assertEqual(val, '3', 'expecting "3"')
        val = status.create(name="resolved")
        self.assertEqual(val, '4', 'expecting "4"')
        val = status.count()
        self.assertEqual(val, 4, 'expecting 4')
        val = status.list()
        self.assertEqual(val, ['1', '2', '3', '4'], 'blah')
        val = status.lookup("in-progress")
        self.assertEqual(val, '2', 'expecting "2"')
        status.retire('3')
        val = status.list()
        self.assertEqual(val, ['1', '2', '4'], 'blah')

    def testB_Issue(self):
        issue = back_anydbm.Class(self.db, "issue", title=String(),
            status=Link("status"))
        self.assertTrue(issue, 'no class object returned')

    def testC_User(self):
        user = back_anydbm.Class(self.db, "user", username=String(),
            password=Password())
        self.assertTrue(user, 'no class object returned')
        user.setkey("username")

# vim: set filetype=python sts=4 sw=4 et si :

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