Design pattern Start--proxy mode

Proxy mode

Role: The agent is equivalent to the access to introduce a certain degree of indirection between the object, but also because of this indirection, you can do a lot of things in the proxy class do not do, such as counting this additional work, you can add a lot of additional functions in the proxy class Ah!

The proxy mode is mainly used in several ways:

• Virtual proxies: Create expensive objects as needed, and choose whether to instantiate this large object through the proxy class
• Remote Agent
• Security Agent

The following examples and class diagrams capture the seventh chapter of the in-depth study of Java design patterns

Class Diagram:

Realize:

Design pattern Start--proxy mode