Analysis
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Evaluate design patterns side by side across intent, tradeoffs, languages, and integration fit.
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Analysis
Pattern comparison
Reviewing 3 patterns.
| Criteria | |||
|---|---|---|---|
| Basics | |||
| Category | creational | behavioral | structural |
| Summary | Provide an interface for creating families of related objects without specifying their concrete classes. | Encapsulate a request as an object so it can be invoked, queued, logged, or undone independently of the receiver that performs the work. | — |
| Intent | Provide an interface for creating families of related objects without specifying their concrete classes. | Encapsulate a request as an object so it can be invoked, queued, logged, or undone independently of the receiver that performs the work. | Provide a surrogate or placeholder for another object to control access to it. |
| Decision factors | |||
| Problem | Client code needs to create families of related objects, but hardcoding concrete classes makes the code rigid and hard to swap. | A system needs to trigger actions without tightly coupling the code that requests an operation to the code that performs it, and it may also need queuing, history, or undo support. | A client needs to interact with an object indirectly because the real object may be expensive, sensitive, or remote. |
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| Integration notes | Abstract Factory is especially useful when your app must produce matching sets of related objects for a theme, provider, platform, or pipeline. | Commands work well for UI actions, background jobs, workflow steps, and undoable operations because invokers can trigger commands without depending on receiver details. | Proxy is useful for lazy loading, access control, caching, logging, and remote service wrappers. |