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Removing old external dependency provider example

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Roman Mogilatov 2015-06-18 16:37:19 +03:00
parent ab548df0b2
commit 8b479a1898
1 changed files with 0 additions and 48 deletions
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48
examples/readme2/external_dependency_providers.py
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@ -1,48 +0,0 @@
"""External dependency providers example."""
import sqlite3
from objects.providers import Singleton
from objects.providers import Factory
from objects.providers import ExternalDependency
from objects.injections import KwArg
from objects.injections import Attribute
class ObjectA(object):
"""ObjectA has dependency on database."""
def __init__(self, database):
"""Initializer.
Database dependency need to be injected via init arg."""
self.database = database
def get_one(self):
"""Select one from database and return it."""
return self.database.execute('SELECT 1').fetchone()[0]
# Database and `ObjectA` providers.
database = ExternalDependency(instance_of=sqlite3.Connection)
object_a_factory = Factory(ObjectA,
KwArg('database', database))
# Satisfaction of external dependency.
database.override(Singleton(sqlite3.Connection,
KwArg('database', ':memory:'),
KwArg('timeout', 30),
KwArg('detect_types', True),
KwArg('isolation_level', 'EXCLUSIVE'),
Attribute('row_factory', sqlite3.Row)))
# Creating several `ObjectA` instances.
object_a_1 = object_a_factory()
object_a_2 = object_a_factory()
# Making some asserts.
assert object_a_1 is not object_a_2
assert object_a_1.database is object_a_2.database is database()