Refactor ApplicationService

[GOODBOY008]

ApplicationService is violating the Interface segregation principle.

Try to refactor this interface by breaking it down into smaller according to different principle.

1. Split ApplicationService into three interface by principle.

• ApplicationService : manage application info.
• ApplicationUtilsService : for validate and query special info.
• ApplicationOpService : operate the jobs on cluster corresponding to application.

2. Split ApplicationOpService into different implement by deploy type.

Appreciate any comments or feedback you may have on this discussion.

[wolfboys]

How about split ApplicationService into three interface : ApplicationManageService, ApplicationActionService, ApplicationInfoService?