https://github.com/ajenti/jadi

A minimalistic DI container
https://github.com/ajenti/jadi

di ioc python

Last synced: 9 days ago
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A minimalistic DI container

• Host: GitHub
• URL: https://github.com/ajenti/jadi
• Owner: ajenti
• License: lgpl-3.0
• Created: 2015-04-22T13:51:31.000Z (over 9 years ago)
• Default Branch: master
• Last Pushed: 2021-10-28T07:27:29.000Z (about 3 years ago)
• Last Synced: 2024-10-11T11:53:56.397Z (about 1 month ago)
• Topics: di, ioc, python
• Language: Python
• Homepage: http://docs.ajenti.org/en/latest/ref/jadi.html
• Size: 10.7 KB
• Stars: 8
• Watchers: 5
• Forks: 7
• Open Issues: 0
• Metadata Files:
  • Readme: README.md
  • License: LICENSE

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README

        
# Jadi

[![Build Status](https://travis-ci.org/ajenti/jadi.svg)](https://travis-ci.org/ajenti/jadi)

Minimalistic IoC for Python

```python

import os

import subprocess

from jadi import service, component, interface, Context

# @services are singletons within their Context

@service

class FooService(object):

    def __init__(self, context):

        self.context = context

    def do_foo(self):

        BarManager.any(self.context).do_bar()

@interface

class BarManager(object):

    def __init__(self, context):

        pass

# @components implement @interfaces

@component(BarManager)

class DebianBarManager(BarManager):

    def __init__(self, context):

        pass

    @classmethod

    def __verify__(cls):

        return os.path.exists('/etc/debian_version')

    def do_bar(self):

        subprocess.call(['cowsay', 'bar'])

@component(BarManager)

class RHELBarManager(BarManager):

    def __init__(self, context):

        pass

    @classmethod

    def __verify__(cls):

        return os.path.exists('/etc/redhat-release')

    def do_bar(self):

        subprocess.call(['yum', 'install', 'bar'])

# Context tracks instantiated @services and @components

ctx = Context()

assert FooService.get(ctx) == FooService.get(ctx)

# .all() returns instance of each implementation

assert len(BarManager.all(ctx)) == 2

# .classes() returns class of each implementation

assert len(BarManager.classes(ctx)) == 2

# .any() returns first available implementation

assert isinstance(BarManager.any(ctx), BarManager)

foo = FooService.get(ctx)

foo.do_foo()

```