Status Report for 11/28/2007 -- 12/26/2007

Progress

1. Design for server side (updated)

To do it step by step, we first design the client side for one user who can register/monitor one variable/sensor.

The basic idea is that write new data to an XML file when it is available one the server side and return the file’s URL to the client.

2. Implementation

At current stage, logic in server side is not difficult. A program written by JSP, which is called by client, would do the following steps:

• Register a variable based on the parameters from client
• Write the new data to an XML file
• Return the URL of the file to the client

Discussion

1. Register multiple sensors for one user

The user first registers variable called A-var, the server can get the new coming data from some callback function. After that, he wants to register another variable B-var, is that true that we can obtain both data from the same function? There is a problem in register/unregister.

2. Register multiple sensors for multiple users

If multiple users register the same variable, which is better, the arrary or file? How to maintain the session?

Reference

• Bulletproof Ajax, Keith, Jeremy
• Ajax in practice, Crane, Dave
• JSP : the complete reference, Hanna, Phil
• JavaScript bible, Goodman, Danny
• Ajax for web application developers, Hadlock, Kris
• Ajax design patterns, Mahemoff, Michael
• Ajax : creating Web pages with asynchronous JavaScript and XML, Woychowsky, Edmond
• Ajax bible, Holzner, Steven