December 2017
Intermediate to advanced
468 pages
13h 12m
English
book
Architectural Patterns
by Anupama Murali, Pethuru Raj, Harihara Subramanian J, Pethuru Raj Chelliah
Content preview from Architectural Patterns
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Memento
This pattern suggests capturing and externalizing an object's internal state without violating encapsulation principles; so, we can restore the captured object.
The preceding diagram depicts the structure of the memento pattern and a sample implementation for a calculator application. The Caretaker interface helps restore the previous operation that's handled in the <<Calculator>> concrete class.
These are the benefits:
- It preserves encapsulation boundaries by exposing information limited to the originator
- It simplifies the originator
Impacts are as follows:
- Memento implementation might be expensive, as it needs to copy large amounts ...
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I'm always learning. So when I got on to O'Reilly, I was like a kid in a candy store. There are playlists. There are answers. There's on-demand training. It's worth its weight in gold, in terms of what it allows me to do.