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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Proxy
The proxy pattern suggests providing a placeholder (surrogate) for another object to control and get access to it. It is the best fit for lazy loading of objects (defer the creation and initialization until we need to use it).
The preceding diagram shows a sample implementation of a proxy pattern for a payment class, and the payment can be either by check or by pay order. However, the actual access would be to DebitAccount object, so PayOrderProxy and CheckProxy are both surrogates for Debit Account.
The following are the benefits:
- It introduces the right level of indirections when accessing an object (abstraction of an object that ...
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