[HADOOP-670] Generic types for FSNamesystem

• Type: Improvement
• Status: Closed
• Priority: Major
• Resolution: Fixed
• Affects Version/s: 0.7.2
• Fix Version/s: 0.8.0
• Assignee: Konstantin Shvachko
• Reporter: Konstantin Shvachko
• Created: 01/Nov/06 22:24
• Updated: 03/Nov/06 22:40
• Resolved: 02/Nov/06 02:47

Description

I introduced generic types for FSNamesystem class.
I tried to keep interfaces in declarations of the member as general as possible
in order to have flexibility to change types of instances in the future.
I tried to contain changes within one java file.

I also replaced Vector types by ArrayList. Vectors are synchronized,
which we don't need since we already have top level synchronization in FSNamesystem.