Robert Kanter commented on YARN-2423:

When I originally started working on this, we hadn't even started planning the 
new ATS yet.  The motivation was to make things easier for frameworks (e.g. 
Spark) who want to use the API, but would rather have Java calls instead of 
REST calls.  

I believe we're planning on doing an alpha for the new ATS in 2.8, so if we can 
include some Java API for GET calls in 2.7, that would at least give closure 
here.  [~zjshen], [~sjlee0], any thoughts on how we should handle compatibility 
for this?

> TimelineClient should wrap all GET APIs to facilitate Java users
> ----------------------------------------------------------------
>                 Key: YARN-2423
>                 URL: https://issues.apache.org/jira/browse/YARN-2423
>             Project: Hadoop YARN
>          Issue Type: Sub-task
>            Reporter: Zhijie Shen
>            Assignee: Robert Kanter
>         Attachments: YARN-2423.004.patch, YARN-2423.005.patch, 
> YARN-2423.006.patch, YARN-2423.007.patch, YARN-2423.patch, YARN-2423.patch, 
> YARN-2423.patch
> TimelineClient provides the Java method to put timeline entities. It's also 
> good to wrap over all GET APIs (both entity and domain), and deserialize the 
> json response into Java POJO objects.

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