[TAJO-1288] Refactoring org.apache.tajo.master package

• Type: Improvement
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Fix Version/s: 0.10.0
• Component/s: QueryMaster
• Assignee: Hyunsik Choi
• Reporter: Hyunsik Choi
• Created: 08/Jan/15 13:00
• Updated: 08/Jan/15 15:57
• Resolved: 08/Jan/15 15:36

Description

org.apache.tajo.master includes a mixed of classes for TajoMaster and QueryMaster. It looks somewhat messy. This patch refactors them to be located in a proper package. Especially, I did as follows:

• Move some classes to org.apache.tajo.querymaster
• Move org.apache.tajo.scheduler to org.apache.tajo.master.scheduler
• Move some classes in org.apache.tajo.master to tajo.apache.tajo.master.exec
• Move some classes in org.apache.tajo.master to org.apache.tajo.ha.
• Remove FragmentPair, ScheduledFetch, and QueryMasterRunner which are unused.
• Move Abstract/Default TaskScheduler and TaskScheduler* to org.apache.tajo.querymaster.

This is just a move issue of classes. Now, nobody seems to be working on these packages. So, I think that now is the change to refactor them.

Issue Links

• is required by: TAJO-1282 Cleanup the relationship of QueryInProgress and QueryJobManager