object-graph-builder¶

https://travis-ci.org/eshta/object-graph-builder.svg?branch=master

Provides a multi-step dependency injection container builder to allow adding/recreating object graphs in different stages through an app life-cycle

Features¶

Offering a container builder, so one can dynamically build the object graph with many apps adding their specs, classes, modules
Dependency Injection Container (pinject)

Requirements¶

Python 3.6+

Usage¶

Prepare for development¶

A Python 3.6+ interpreter is required in addition to pipenv.

$ make init

Now you’re ready to run the tests:

$ make test

Resources¶

Contents:

Installation¶

Install with pip:
```
pip install object-graph-builder
```

1. Framework Agnostic App¶

In container.py

import object_graph.builder

builder =  object_graph.builder.ObjectGraphBuilder()

App 1

import container
import pinject


class MyService(object):
        def __init__(long_name: SomeReallyLongClassName):
                self.my_dep = long_name

class MyBindingSpec(pinject.BindingSpec):
         def configure(self, bind):
                 bind('long_name', to_class=SomeReallyLongClassName)

container.builder.addBindingSpec(MyBindingSpec)

App 2

import container

container.builder.addModules([app2.module1, app2.module2])

Client

import container

object_graph = container.builder.get_object_graph()

my_service = object_graph.provide(MyService)

2. Django Example¶

One can define the builder in your settings.py and then import it in each app and add the configurations you need

In settings.py

import object_graph.builder

object_graph_builder =  object_graph.builder.ObjectGraphBuilder()

App 1 in apps.App1Config.ready()

from config.settings import object_graph_builder
import pinject


class MyService(object):
        def __init__(long_name: SomeReallyLongClassName):
                self.my_dep = long_name

class MyBindingSpec(pinject.BindingSpec):
         def configure(self, bind):
                 bind('long_name', to_class=SomeReallyLongClassName)

object_graph_builder.addBindingSpec(MyBindingSpec)

App 2 in apps.App2Config.ready()

from config.settings import object_graph_builder

object_graph_builder.addModules([app2.module1, app2.module2])