General Description
We plan to build a highly avaible electronic commerce service system using
Primary-Backup setup. Client will be able to make transactions with the
primary server. When the primary server is down, the backup server becomes
the primary and support client transactions. The primary and backup servers
will be synchronized during the transactions. If time permits, we will
also attempt to implement recovery and rejoining after a server crash.
Basic
Functionalities on User Level
Client should be able to register.
Client should be able to see a list of products and prices.
Client should be able to issue transactions to buy a certain quantity of a product.
Top
level View
Agent Functionalities:
- Communicate with database
Communicate with client
Synchronize with backup servers
Recover and rejoin the system after a crash
Design Choices
Primary-Back Protocol: Tandem Protocol
Transaction: 2 phase commitment
Implementation Details
OS Platform: Solaris
Implementation Language: Java
Developement Environment: JDK 1.1.3
Database to use: MiniSQL
Secure Communication: SSL 3.0 implemented in Java
Server will be a Java program that uses JDBC to communicate witht the database.
Client program will be a Java application.