Use cases
Since there are at least four common proxy types, the Proxy design pattern has many use cases, as follows:
It is used when creating a distributed system using either a private network or the cloud. In a distributed system, some objects exist in the local memory and some objects exist in the memory of remote computers. If we don't want the client code to be aware of such differences, we can create a remote proxy that hides/encapsulates them, making the distributed nature of the application transparent.
It is used if our application is suffering from performance issues due to the early creation of expensive objects. Introducing lazy initialization using a virtual proxy to create the objects only at the moment they are actually required can give us significant performance improvements.
It is used to check if a user has sufficient privileges to access a piece of information. If our application handles sensitive information (for example, medical data), we want to make sure that the user...
