Serializing CAS 2 Ticket Caches

If you want more than one CAS server for failover purposes, see Clustering the CAS server.

To modify CAS 2 to serialize ticket caches and restore them on initialization, the basic strategy is this:

• Modify CacheInit (a ServletContextListener) to persist the caches on shutdown, and attempt to restore them on initialization
  • Storing serialized data into files
  • web.xml has a new parameter for directory location
• Make Ticket as Serializable
• Make the caches Serializable
  • Use custom serialization since their implementations use a WeakHashMap which is not serializable

Attached is CAS:a patch file of the differences in the code.  Note that this implementation was previously modified so that 'tolerance' (timeout) is a long instead of an int in the caches.

The CAS:CacheInit.java file has been updated to serialize to files instead of the the Java Preferences API.  Replace the patch file's CacheInit.java with the attached one.