== Brief Guide to Service Basis 

resource encapsulation provides common functions such as resource broker, cache, resource container.

1. resourceBroker 
resourceBroker checks and monitors the status of resources. 
This module notifies the change of reachability of selected resource to users. 

2. resourceCache
resourceCache provides the up-to-date "DATA" of remote resource to users.
It tracks the most recent value of the selected resource and notifies to users according to called API

3. resourceContainer
Need to be updated.