You can also read some of the articles or watch some of the recorded webcasts e.g.
As far as standard documentation, the EMA Java Developer guide and Concepts guide are useful reading.
Most of the EMA Java Consumer examples consume and process streaming data - with the exception of a few like the Snapshot example / offstream posting example etc.
The simplest example is example100__MarketPrice__Streaming. A slightly more advanced example is example200__MarketPrice__Streaming
The above examples can be found in series100 and series200 subfolders of Ema\Src\examples\java\com\thomsonreuters\ema\examples\training folder when unpack the ElektronSDK.
Looks like you are consuming a Chain RIC - please refer to the articles on Chains starting with Simple Chain objects for EMA - Part 1
Prior to that I would recommend you work through the standard Tutorials to get a better high level understanding of how EMA Java works - this will definitely help more sense of things.