Django Apps to Services

by Craig Kerstiens

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Django Apps to Services

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Craig Kerstiens @craigkerstiens work at @heroku

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Project A collection of configuration and apps for a particular Website. (per Django Project) Django

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Project App A collection of configuration and apps for a particular Website. (per Django Project) Django

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Project App A collection of configuration and apps for a particular Website. A web application that does something. I.e. Weblog, Poll, Ticket system (per Django Project) Django

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Table Table Table Table Table Table Table Table Table Table Table Table Table Table Table Table Table Table Table Table Table

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Table Table Table Table Table Table Table Table Table Table Table Table Table Table Table Table Table Table Table Table Table

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Table Table Table Table Table Table Table Table Table Table Table Table Table Table Table Table Table Table Table Table Table App

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Within Django

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Project Within Django

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Project App App App Within Django

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Project App App App Tickets FAQ FaqCreator Within Django

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Project App App App Tickets FAQ FaqCreator Within Django cd myproject && find . manage.py requirements.txt settings.py urls.py ./faq/admin.py ./faq/forms.py ./faq/models.py ./faq/urls.py ./faq/views.py ./faqcreator/admin.py ./faqcreator/forms.py ./faqcreator/models.py ./faqcreator/urls.py ./faqcreator/views.py ./tickets/admin.py ./tickets/forms.py ./tickets/models.py ./tickets/urls.py ./tickets/views.py

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Reusability

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cd myproject && find . Reusability

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cd myproject && find . manage.py requirements.txt settings.py urls.py ./faq/admin.py ./faq/forms.py ./faq/models.py ./faq/urls.py ./faq/views.py ./faqcreator/admin.py ./faqcreator/forms.py ./faqcreator/models.py ./faqcreator/urls.py ./faqcreator/views.py ./tickets/admin.py ./tickets/forms.py ./tickets/models.py ./tickets/urls.py ./tickets/views.py Reusability

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cd myproject && find . cd myproject && find . manage.py requirements.txt settings.py urls.py ./faq/admin.py ./faq/forms.py ./faq/models.py ./faq/urls.py ./faq/views.py ./faqcreator/admin.py ./faqcreator/forms.py ./faqcreator/models.py ./faqcreator/urls.py ./faqcreator/views.py ./tickets/admin.py ./tickets/forms.py ./tickets/models.py ./tickets/urls.py ./tickets/views.py --> Reusability

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cd myproject && find . manage.py requirements.txt settings.py urls.py cd myproject && find . manage.py requirements.txt settings.py urls.py ./faq/admin.py ./faq/forms.py ./faq/models.py ./faq/urls.py ./faq/views.py ./faqcreator/admin.py ./faqcreator/forms.py ./faqcreator/models.py ./faqcreator/urls.py ./faqcreator/views.py ./tickets/admin.py ./tickets/forms.py ./tickets/models.py ./tickets/urls.py ./tickets/views.py --> Reusability

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cd myproject && find . manage.py requirements.txt settings.py urls.py cat myproject/requirements.txt cd myproject && find . manage.py requirements.txt settings.py urls.py ./faq/admin.py ./faq/forms.py ./faq/models.py ./faq/urls.py ./faq/views.py ./faqcreator/admin.py ./faqcreator/forms.py ./faqcreator/models.py ./faqcreator/urls.py ./faqcreator/views.py ./tickets/admin.py ./tickets/forms.py ./tickets/models.py ./tickets/urls.py ./tickets/views.py --> Reusability

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cd myproject && find . manage.py requirements.txt settings.py urls.py cat myproject/requirements.txt faq==0.1 faqcreator==0.1 tickets==0.1 cd myproject && find . manage.py requirements.txt settings.py urls.py ./faq/admin.py ./faq/forms.py ./faq/models.py ./faq/urls.py ./faq/views.py ./faqcreator/admin.py ./faqcreator/forms.py ./faqcreator/models.py ./faqcreator/urls.py ./faqcreator/views.py ./tickets/admin.py ./tickets/forms.py ./tickets/models.py ./tickets/urls.py ./tickets/views.py --> Reusability

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REUSABILITY means faster features due to DRY (Don’t Repeat Yourself)

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REUSABILITY means faster features due to DRY (Don’t Repeat Yourself) REUSABILITY does not always mean SCALABILITY or MAINTAINABILITY

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REUSABILITY means faster features due to DRY (Don’t Repeat Yourself) REUSABILITY does not always mean SCALABILITY or MAINTAINABILITY

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Project App A collection of configuration and apps for a particular Website. A web application that does something. I.e. Weblog, Poll, Ticket system (per Django Project) Django

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Project App A collection of configuration and apps for a particular Website. A web application that does something. I.e. Weblog, Poll, Ticket system (per Django Project) Django

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Project App A collection of configuration and apps for a particular Website. A web application that does something. I.e. Weblog, Poll, Ticket system Django Service Method of communication over the web. Web APIs allow combination of multiple services

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Tech imitate Teams Project App App App Tickets FAQ FaqCreator Company Support Knowledge Base

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Support Knowledge Base Teams

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App App Support Knowledge Base Teams Grow

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App App Support Knowledge Base Billing Teams Grow

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App App Support Knowledge Base Billing Marketing Teams Grow

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App App Support Knowledge Base Billing Marketing Analytics Mobile API Front End Social Teams Grow

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App App App Support Knowledge Base Billing Apps Grow Marketing Analytics Mobile API Front End Social 3 Apps

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App App App Support Knowledge Base Billing Apps Grow App App App Marketing Analytics Mobile App App App API Front End Social 9 Apps

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Support Knowledge Base Billing Apps Grow Marketing Analytics Mobile API Front End Social 9 Apps 1 Codebase

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SOA To the Rescue

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SOA To the Rescue

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SOA To the Rescue

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Defined contract for communicating Service

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Defined contract for communicating Service $ curl -O $FAQ_API/create/ -X “question=my\ question source=123”

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In Python

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In Python data = { ‘question’: “my question”, ‘source’: 123 } requests.POST(os.environ[‘FAQ_API’] + ‘/create/’, data=data)

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Version Bump data = { ‘question’: “my question”, ‘source’: 123, ‘related’: [456, 789] } requests.POST(os.environ[‘FAQ_API’] + ‘/v2/create’, data=data)

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Version Bump data = { ‘question’: “my question”, ‘source’: 123, ‘related’: [456, 789] } requests.POST(os.environ[‘FAQ_API’] + ‘/v2/create’, data=data)

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Version Bump data = { ‘question’: “my question”, ‘source’: 123, ‘related’: [456, 789] } requests.POST(os.environ[‘FAQ_API’] + ‘/v2/create’, data=data) STILL VALID requests.POST(os.environ[‘FAQ_API’] + ‘/v1/create’, data=data)

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What’s a service Provider API_HOST= http://127.0.0.1

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What’s a service Provider Endpoint API_HOST= http://127.0.0.1 /v1/create/

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What’s a service Provider Endpoint API_HOST= http://127.0.0.1 /v1/create/ Contract { ‘question’: ‘foo bar’, ‘source’: 123 }

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Service App

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Service App Models Views URLs Provider Endpoint Contract

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A SERVICE means REUSABILITY and enables SCALABILITY and MAINTAINABILITY

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A SERVICE means REUSABILITY and enables SCALABILITY and MAINTAINABILITY

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In the real world

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In the real world

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In the real world Install Sentry

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In the real world Install Sentry Send lots of data

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In the real world Install Sentry Send lots of data ...........

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In the real world Install Sentry Send lots of data ........... Crash sentry

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In the real world Install Sentry Send lots of data ........... Crash sentry ...........

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In the real world Install Sentry Send lots of data ........... Crash sentry ........... Scale sentry

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In the real world Install Sentry Send lots of data ........... Crash sentry ........... Scale sentry ...........

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In the real world Install Sentry Send lots of data ........... Crash sentry ........... Scale sentry ........... Some time later, scale the app you build

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In the real world Install Sentry Send lots of data ........... Crash sentry ........... Scale sentry ........... Some time later, scale the app you build VS

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In the real world Install Sentry Send lots of data ........... Crash sentry ........... Scale sentry ........... Some time later, scale the app you build Install Sentry VS

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In the real world Install Sentry Send lots of data ........... Crash sentry ........... Scale sentry ........... Some time later, scale the app you build Install Sentry Send lots of data to Sentry Service VS

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App App App Support Knowledge Base Billing Where to Start App App App Marketing Analytics Mobile App App App API Front End Social

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App App Support Knowledge Base Billing Where to Start App Marketing Analytics Mobile App API Front End Social

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Service App

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Service App Models Views URLs Provider Endpoint Contract

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Take aways

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Take aways 1. Start non-critical (Cheat) 2. Create services where theres pain 3. Start small

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Fin. Resources http://www.craigkerstiens.com http://bit.ly/djangoappstoservices http://www.12factor.net