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| 1 | # Business and Data Objects | |
| 2 | import functools | |
| 3 | class Foo: | |
| 4 | def __init__(self,create_bar): | |
| 5 | self.create_bar = create_bar | |
| 6 | def do_stuff(self,times): | |
| 7 | for _ in range(times): | |
| 8 | bar = self.create_bar() | |
| 9 | print(bar) | |
| 10 | ||
| 11 | class Bar: | |
| 12 | def __init__(self,prefix): | |
| 13 | self.prefix = prefix | |
| 14 | def __str__(self): | |
| 15 | return str(self.prefix)+"Hello" | |
| 16 | ||
| 17 | class Prefix: | |
| 18 | def __init__(self,name): | |
| 19 | self.name = name | |
| 20 | self.count = 0 | |
| 21 | def __str__(self): | |
| 22 | self.count +=1 | |
| 23 | return self.name+" "+str(self.count)+": " | |
| 24 | ||
| 25 | # Wiring up dependencies | |
| 26 | def create_bar(prefix): | |
| 27 | return Bar(prefix) | |
| 28 | ||
| 29 | ||
| 30 | def create_prefix(name): | |
| 31 | return Prefix(name) | |
| 32 | ||
| 33 | class BarCreator: | |
| 34 | def __init__(self, name): | |
| 35 | - | return Foo(functools.partial(create_bar,create_prefix(name))) |
| 35 | + | self.prefix = create_prefix(name) |
| 36 | def __call__(self): | |
| 37 | return create_bar(self.prefix) | |
| 38 | ||
| 39 | def create_foo(name): | |
| 40 | return Foo(BarCreator(name)) | |
| 41 | ||
| 42 | #def create_foo(name): | |
| 43 | # return Foo(functools.partial(create_bar,create_prefix(name))) | |
| 44 | ||
| 45 | # Starting the application | |
| 46 | f1 = create_foo("foo1")
| |
| 47 | f2 = create_foo("foo2")
| |
| 48 | f1.do_stuff(3) | |
| 49 | f2.do_stuff(2) | |
| 50 | f1.do_stuff(2) |
