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decoator or proxy partern?

 
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EJBObject uses decoator or proxy parttern for EJB instance?
 
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A decorator adds functionality to an already existing Object without adding it directly into the class code.
A Proxy is kind of like a middle man, it passes calls through itself to the actual object it is representing. It can also filter some of the calls. Think of it like a real Proxy Server. A Proxy server receives calls from the outside, looks at the call to make sure it is valid, then passes it to the actual object.
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