CODEWITHSUNDEEP
phpdependency-injectioninversion-of-controlioc-container
artvolk
artvolk

Reputation: 9518

How to use DI container in reusable library?

I'm building a reusable library in PHP which will be used by multiple in-house applications (some web some not). I use constructor dependency injection mostly for my classes, for example injecting my Repository classes into business logic classes:

namespace \Company\Project\BusinessLogic;

class MyComplexBusinessWorkflow
{
    private $_repository;

    public function __construct(IMyEntityRepository $repository)
    {
        $this->_repository = $repository
    }

    ...
}

So with Dice I'd like to have something like this which inject default for the library IMyEntityRepository implementation:

$my_complex_workflow_instance = $dice->create('MyComplexBusinessWorkflow');

instead of:

$my_complex_workflow_instance = new MyComplexBusinessWorkflow(new MyEntityMySQLRepository(new MysqlConnectionWrapper()));

I'm ok with embedding particular DI container library into my library code, but not sure how to manage container instance ($dice in the code above) itself.

Upvotes: 2

Views: 855

Answers (1)

artvolk
artvolk

Reputation: 9518

Didn't get an answer, so provide my "solution". I've implemented a separate Builder class for instantiating DI container.

Code that will use a library will have a dependency on the particular container, this can be absracted by an interface. Unfortunatelly different DI containers work in different way, so that's not a complete abstraction.

In comments I was pointed to this interesting initiative to unify DI containers in PHP: https://github.com/container-interop/container-interop

Upvotes: 1

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