Abstract
Consider the typical example of corporate malpractice: insider trading. Say a particular trader has been caught red-handed trading on inside information. Who is to blame for this? If management didn’t know, it’s the trader. But maybe the trader’s peers were in on it, in which case the group manager might be the one responsible. Or perhaps the practice is institutional, in which case it’s the CEO who would take the blame. This is a good example of a Chain of Reponsibility.
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Notes
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Actually, there’s a bit of confusion here. The concept of Command Query Separation (CQS) suggests the separation of operations into commands (which mutate state and yield no value) and queries (which do not mutate anything but yield a value). The GoF does not have a concept of a Query, so we let any encapsulated instruction to a component be called a Command.
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© 2018 Dmitri Nesteruk
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Nesteruk, D. (2018). Chain of Responsibility. In: Design Patterns in Modern C++. Apress, Berkeley, CA. https://doi.org/10.1007/978-1-4842-3603-1_13
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DOI: https://doi.org/10.1007/978-1-4842-3603-1_13
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Publisher Name: Apress, Berkeley, CA
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