[SLIDER-1079] Cache MetaInfo for AgentClientProvider

• Type: Bug
• Status: Resolved
• Priority: Major
• Resolution: Fixed
• Affects Version/s: Slider 0.81, Slider 0.90.2
• Fix Version/s: Slider 0.91
• Component/s: client
• Assignee: shanyu zhao
• Reporter: shanyu zhao
• Created: 29/Jan/16 22:14
• Updated: 18/Jun/16 23:15
• Resolved: 15/Jun/16 00:34

Description

During app creation, the slider client calls AgentUtils.getApplicationMetainfo() 3 times. Each time this function actually download the whole app package from HDFS. If the app package is big, this is rather inefficient.

The 3 places are:
1) SliderClient.actionBuild() -> AgentClientProvider.validateInstanceDefinition()
2) AgentClientProvider.getApplicagionTags()
3) AgentClientProvider.validateInstanceDefinition()

We should cache the metainfo object in AgentClientProvider.