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14 lines
589 B
Markdown
14 lines
589 B
Markdown
## Command
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Command pattern encapsulates a request as an object, thereby letting you parameterize
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clients with different requests, queue or log requests, and supports undoable
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operations. The pattern has a behavioral purpose and deals with relationships between objects.
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### When to use
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* want to parameterize objects by an action to perform
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* want to specify, queue, and execute requests at different times
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* support undo
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* support logging changes so that they can be reapplied in case of a system crash
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* structure a system around high-level operations built on primitives operations
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