I'm going to cover a simple, but effective, utility for managing state and transitions (aka workflow). We often need to store the state (status) of a model and it should only be in one state at a time.
THIS GIST WAS MOVED TO TERMSTANDARD/COLORS REPOSITORY.
PLEASE ASK YOUR QUESTIONS OR ADD ANY SUGGESTIONS AS A REPOSITORY ISSUES OR PULL REQUESTS INSTEAD!
RDBMS-based job queues have been criticized recently for being unable to handle heavy loads. And they deserve it, to some extent, because the queries used to safely lock a job have been pretty hairy. SELECT FOR UPDATE followed by an UPDATE works fine at first, but then you add more workers, and each is trying to SELECT FOR UPDATE the same row (and maybe throwing NOWAIT in there, then catching the errors and retrying), and things slow down.
On top of that, they have to actually update the row to mark it as locked, so the rest of your workers are sitting there waiting while one of them propagates its lock to disk (and the disks of however many servers you're replicating to). QueueClassic got some mileage out of the novel idea of randomly picking a row near the front of the queue to lock, but I can't still seem to get more than an an extra few hundred jobs per second out of it under heavy load.
So, many developers have started going straight t
One of the best ways to reduce complexity (read: stress) in web development is to minimize the differences between your development and production environments. After being frustrated by attempts to unify the approach to SSL on my local machine and in production, I searched for a workflow that would make the protocol invisible to me between all environments.
Most workflows make the following compromises:
Use HTTPS in production but HTTP locally. This is annoying because it makes the environments inconsistent, and the protocol choices leak up into the stack. For example, your web application needs to understand the underlying protocol when using the secure flag for cookies. If you don't get this right, your HTTP development server won't be able to read the cookies it writes, or worse, your HTTPS production server could pass sensitive cookies over an insecure connection.
Use production SSL certificates locally. This is annoying
| #!/usr/bin/env python | |
| # encoding: utf-8 | |
| """emlx.py | |
| Class to parse email stored with Apple proprietary emlx format | |
| Created by Karl Dubost on 2013-03-30 | |
| Inspired by Rui Carmo — https://the.taoofmac.com/space/blog/2008/03/03/2211 | |
| MIT License""" |
| """sendmail email backend class for postfix.""" | |
| import threading | |
| from django.conf import settings | |
| from django.core.mail.backends.base import BaseEmailBackend | |
| from subprocess import Popen,PIPE | |
| class EmailBackend(BaseEmailBackend): | |
| def __init__(self, fail_silently=False, **kwargs): |
| [alias] | |
| st = "!git_stash_check; git status" |
| #!/bin/sh | |
| # Credits to: | |
| # - http://vstone.eu/reducing-vagrant-box-size/ | |
| # - https://github.com/mitchellh/vagrant/issues/343 | |
| aptitude -y purge ri | |
| aptitude -y purge installation-report landscape-common wireless-tools wpasupplicant ubuntu-serverguide | |
| aptitude -y purge python-dbus libnl1 python-smartpm python-twisted-core libiw30 | |
| aptitude -y purge python-twisted-bin libdbus-glib-1-2 python-pexpect python-pycurl python-serial python-gobject python-pam python-openssl libffi5 |
| #!/bin/bash | |
| # License: Public Domain. | |
| # Author: Joseph Wecker, 2012 | |
| # | |
| # -- DEPRICATED -- | |
| # This gist is slow and is missing .bashrc_once | |
| # Use the one in the repo instead! https://github.com/josephwecker/bashrc_dispatch | |
| # (Thanks gioele) | |
| # | |
| # Are you tired of trying to remember what .bashrc does vs .bash_profile vs .profile? |
