Service Locator

• A service locator knows now to find (and create) every dependency needed in the system.

• This knowledge is provided by someone else at another moment of the application lifecycle.

• Contextual information can be passed onto the SL for it to provide the correct implementation of a given service. Factories can still be used for more complex and specific context passing.

• Individual classes are still responsible of asking the locator what they need. Scalability anyone?

• Hard dependencies are taken on the SL by every class that uses it.

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