April 2019
Intermediate to advanced
360 pages
9h 17m
English
Content preview from Hands-On Design Patterns with Java
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Exploring the command pattern
The purpose of the command design pattern is to send requests as objects. This pattern, also referred to as the transaction or action design pattern, permits the sending of requests without knowing any details about the receiver or even about what is being requested. This might sound counter-intuitive, and requires that it be looked at from a systems perspective and not a human-managed operation. With the command pattern, we encapsulate requests as objects and transmit them to a receiver.
We will look at an example use case, the UML class diagram, and the source code necessary to implement the command design pattern for this scenario.
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I wanted to learn C and C++, but it didn't click for me until I picked up an O'Reilly book. When I went on the O’Reilly platform, I was astonished to find all the books there, plus live events and sandboxes so you could play around with the technology.Addison B.
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