forked from slides/empowering-django-with-background-workers
First pass of updates for Django London
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slides.md
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slides.md
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---
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title: Empowering Django with Background Workers
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title: Bringing Background Workers to Django
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class: text-center
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highlighter: shiki
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transition: slide-left
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@ -9,11 +9,12 @@ themeConfig:
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primary: '#0c4b33'
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---
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# Empowering <logos-django class="[&>path]:fill-white! h-15 w-43"/> with Background Workers
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# Bringing Background Workers to <logos-django class="[&>path]:fill-white! h-15 w-43"/>
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## Jake Howard{.mt-5}
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### Djangocon Europe 2024{.mt-5}
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### Django London{.mt-5}
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#### September 2024
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<!--
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- Here to talk about Background Workers
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@ -30,6 +31,7 @@ layout: full
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<ul class="list-none! [&>li]:m-0! text-2xl mt-10">
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<li><mdi-fire class="fill-white"/> Senior Systems Engineer @ Torchbox</li>
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<li><logos-wagtail class="fill-white"/> Core, Security & Performance teams @ Wagtail</li>
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<li><logos-django-icon class="[&>rect]:hidden!" /> Django Software Foundation Member</li>
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<li><mdi-server-plus class="fill-white" /> I'm an avid self-hoster</li>
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<li><mdi-robot-excited class="fill-white" /> I help students build robots in my "spare" time <small>(https://srobo.org)</small></li>
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</ul>
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- Hi
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- I'm Jake
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- Senior Systems Engineer at Torchbox
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- I'm also on the security team, and as of last week the core team for Wagtail
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- I'm also on the security team, core team and performance teams for Wagtail
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- Leading Django-based CMS
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- Since doing this talk at Djangocon, I'm also a DSF member
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- I exist in many places on the internet
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-->
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@ -332,7 +335,7 @@ layout: section
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<!--
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- Back to Django
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- This is Djangocon after all
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- This is Django London after all
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- In Python and Django, there are lots of different frameworks to achieve background workers
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-->
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@ -609,6 +612,7 @@ layout: fact
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<!--
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- In progress API spec for first-party background workers in Django
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- An approved Enhancement Proposal, slowly making its way into Django itself
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-->
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---
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@ -678,7 +682,9 @@ from wagtail.models import Page
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from django.tasks import task
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@task()
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def send_email_to_user(page: Page, user: User):
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def send_email_to_user(page_id: int, user_id: int):
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page = Page.objects.get(id=page_id)
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user = User.objects.get(id=user_id)
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email_content = render_to_string("notification-email.html", {"user": user, "page": page})
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send_mail(
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subject=f"A change to {page.title} has been published",
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)
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for user in page.subscribers.iterator():
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send_email_to_user.enqueue(user)
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send_email_to_user.enqueue(user.id)
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```
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````
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- With 0 lines changed
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-->
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---
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layout: center
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---
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<v-click>
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```python
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# settings.py
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EMAIL_BACKEND = "django.core.mail.backends.tasks.SMTPEmailBackend"
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```
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</v-click>
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<br />
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```python
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from django.contrib.auth.models import User
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from django.core.mail import send_mail
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from django.template.loader import render_to_string
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from wagtail.models import Page
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for user in page.subscribers.iterator():
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email_content = render_to_string("notification-email.html", {"user": user, "page": page})
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send_mail(
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subject=f"A change to {page.title} has been published",
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message=email_content
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from_email=None, # Use the default sender email
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recipient_list=[user.email]
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)
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```
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<!--
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- In this case, we can actually make it even easier
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- Because email is such a common use case, and so easy to extract
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- Let's go back to the simple implementation
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- No background workers in sight
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- [click]Instead, we can change the email backend
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- Emails are magically sent in the background automatically
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- Without additional work
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-->
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---
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layout: image-right
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image: /soon.png
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# Where are we now?
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<!--
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- I mean, other than Vigo
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- I mean, other than Kraken HQ
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-->
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---
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</div>
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<!--
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- You can play with this right now!
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- Download it, play around with it
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- The dummy backend is great for testing
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- The immediate backend can help get you started
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- The ORM backend is where the magic happens
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- Tell me about all the bugs in my code
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- The more testing we can do now, the better
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- You can use it right now
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- Please do, it's great!
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- For some projects, you won't need anything else
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- Report back the bugs
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- The more testing done now, the better
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- There's still work to do
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- Features
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- Improvements
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- Performance
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- Scalability
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- etc etc
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- The list goes on...
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-->
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---
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<!--
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- More testing
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- More features
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- Writing task queues takes time
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- Upstreaming
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- That's the big benefit
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- Else it really is just another standard
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- The more people know about this, the better it is for everyone
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- Developers can start working on integrating now
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- Knowing they can trivially upgrade once it's in Django
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- Integration
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- Can't use other libraries until the integrations exists
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-->
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---
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- Bringing the stability and longevity guarantees that come with Django
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- Doesn't mean they'll never come
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- With your help, we can make these happen
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- Except swappable argument serialization
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- `pickle` is a bad idea
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-->
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---
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- Test it out
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- Report back your issues
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- Suggest improvements
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- Issues / Discussions are open
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- Issues / Discussions are open and active
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- If you want to get involved, please do!
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- There's plenty of work to do
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- And I can't do it alone!
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