Hessian 2.0 provides cross-language binary object serialization with efficiencies better than java.io serialization. The compaction encodings added to Hessian 2.0 have improved an already-popular cross-platform binary web services protocol. With these changes, Hessian 2.0 now directly competes with java.io serialization in efficiency.

The addition example creates a Hessian web services with a servlet and uses that web service from a JSP client and a Python client.

Writing a Hessian service as a plain-old Java object (POJO) eliminates protocol dependencies and simplifies service testing.

Using Hessian with Dependency Injection pattern creates services which are simpler, protocol-independent and more easily tested. The Dependency Injection pattern (aka inversion of control) gives Resin the responsibility of configuring and assembling the service, protocol, and client.

The addition example creates a Burlap web services with a servlet and uses that web service from a JSP client.

This tutorial shows the usage of the Resin server architecture to handle a custom protocol. Resin handles the TCP connections, multi-threading, and the request object pooling. The application implements a class that reads from a stream and writes to a stream.

Professor Trelawny once got a student to make a Magic8Ball, used for prophecy. Originally it was used with a simple web interface. Now Trelawny wants to provide a magic8ball protocol server on the Hogwart's public web server. The magic8ball protocol is at the same level as http or smtp, it sit's directly on top of TCP/IP.