StrataForge

Current selection

3 of 3 selected

You can now review the differences across the comparison table below.

Chain of Responsibilitybehavioral
View Remove
Decoratorstructural
View Remove
Mediatorbehavioral
View Remove

Criteria	behavioralChain of ResponsibilityView pattern	structuralDecoratorView pattern	behavioralMediatorView pattern
Basics
Category	behavioral	structural	behavioral
Summary	Pass a request through a sequence of handlers until one handles it or the chain ends.	Wrap an object with other objects that implement the same contract so responsibilities can be layered dynamically.	—
Intent	Pass requests along a chain of handlers until one of them handles the request or the request reaches the end of the chain.	Wrap an object with other objects that implement the same contract so responsibilities can be layered dynamically.	Define an object that encapsulates communication between a set of objects, keeping them from referring to each other directly.
Decision factors
Problem	A request must pass through multiple possible handlers, but the sender should not need to know which handler will process it.	A system needs to add optional behaviors to an object without creating many subclasses for every feature combination.	Multiple objects need to coordinate behavior, but direct references between them create tight coupling and complex dependencies.
Tradeoffs	Requests can become harder to trace because control flows through multiple handlers. A long chain may add overhead if many handlers are checked on every request. It keeps handler logic isolated and easier to extend.	Can introduce many small wrapper classes that are harder to trace in debugging. Ordering of decorators matters, so composition needs to be deliberate. Keeps responsibilities modular and easy to combine.	The mediator can become large and complex if it takes on too much coordination logic. Centralizing behavior can make the mediator a single point of failure if it is poorly designed.
Practical fit
Languages	typescript java python angular react react-native csharp dotnet	typescript java python angular react react-native csharp dotnet	typescript java python angular react react-native csharp dotnet
Platforms	frontend backend integration	frontend backend services	Web Backend Mobile UI kits Cross-platform systems
Integration notes	Chain of Responsibility is useful for validation pipelines, support routing, approval flows, and any system where requests may be processed by different handlers in sequence.	Decorators work well for cross-cutting concerns such as logging, retry, caching, compression, and telemetry because each layer keeps the same interface while adding one concern.	Mediator is useful for chat systems, form coordination, workflow orchestration, and any domain where many components must collaborate without knowing about each other.