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25 lines
813 B
Text
25 lines
813 B
Text
Dependency Injection (DI) involves passing (injecting) one or more
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dependencies (or services) to a dependent object (or client) which
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become part of the client's state. It is like the Strategy Pattern,
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except the strategy is set once, at construction. DI enables loosely
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coupled designs, which are easier to maintain and test.
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Features:
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- None run-time overhead;
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- Compiles fast;
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- Gives short diagnostic messages;
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- Is non-intrusive;
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- Reduces boilerplate code;
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- Reduces testing effort;
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- Gives better control of what and how is created;
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- Gives better understanding about objects hierarchy.
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Design goals:
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- Be as fast as possible;
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- Compile as fast as possible;
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- Give short and intuitive error messages;
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- Guarantee object creation at compile-time;
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- Be as non-intrusive as possible;
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- Be easy to extend.
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