1.1 KiB
1.1 KiB
layout, title, folder, permalink, categories, tags
| layout | title | folder | permalink | categories | tags |
|---|---|---|---|---|---|
| pattern | Proxy | proxy | /patterns/proxy/ | pattern_cat | pattern_tag |
Intent: Provide a surrogate or placeholder for another object to control access to it.
Applicability: Proxy is applicable whenever there is a need for a more versatile or sophisticated reference to an object than a simple pointer. Here are several common situations in which the Proxy pattern is applicable
- a remote proxy provides a local representative for an object in a different address space.
- a virtual proxy creates expensive objects on demand.
- a protection proxy controls access to the original object. Protection proxies are useful when objects should have different access rights.
Typical Use Case:
- control access to another object
- lazy initialization
- implement logging
- facilitate network connection
- to count references to an object
Real world examples: