Agent mode--headfirst design mode learning Notes

Proxy mode: Provides an alias or placeholder for another object to control access to this object

Characteristics:

• Allow proxy objects to control access to objects, which can be remote objects (remote proxies), create expensive objects (virtual proxies), or objects that require security control (protection agents)

Agent classification:

• Remote proxy: A local representation of a remote object (the object of a different JVM virtual machine) (the behavior of the local method is transferred to the remote) to help us deal with the details on the network
  • The agent pretends to be a remote object, but it's just an intermediate role that handles accessing remote objects

  • Java RMI provides the customer helper stub and the service helper object skeleton, and provides the same method for it

  • Note the method return value needs to be set to serializable object serializable, which does not require a serialized state variable to use transient declaration
  • Note Handling Remote access exceptions
  • Execution process: From the remote get proxy object-"Client calls proxy object Method-" Call Send to remote-"Remote accept call information and operation on the specific object-" Get results returned to the agent-"agent to tell the results to the customer

Agent mode--headfirst design mode learning Notes