Java J2ee Planet

The proxy pattern is used when you need to represent a complex with a simpler one. If creation of object is expensive, its creation can be postponed till the very need arises and till then, a simple object can represent it. This simple object is called the "Proxy" for the complex object The cases can be innumerable why we can use the proxy. Let's take a scenario. Say, we want to attach an image with the email. Now, suppose this email has to be sent to 1 lakh consumers in a campaign. Attaching the image and sending along with the email will be a very heavy operation. What we can do instead is, send the image as a link to one of the sevlet. The place holder of the image will be sent. Once the email reaches the consumer, the image place holder will call the servlet and load the image at run time straight from the server. Let's try and understand this pattern with the help of a non-software example as we have tried to do throughout this article. Bank.java