Week #7: Archive Management - Part II

This week I finished the implementation of "Archive Management", including:

1. Retrieving a list of collections
2. Retrieving a collection
3. Removing a collection

Actually, I've finished it on July 7. After that, I was always thinking about how to implement "Replication". This part(Replication) seems like implementing a "version control system"(Simpler, of course). I still can't figure out an efficient way to do this, so I decide to make it "workable" first.

Here is my thoughts:

1. Add a "access" attribute to chat element, representing the time this collection is last accessed(created/modified/removed).
2. modified_handler check this "access" attribute to determine if include this collection in the result set or not.
3. If a collection has no any child, that means it has been deleted.

The next step:

1. Mid-term Evaluation, :)
2. Replication