Jonathan Hsieh created HBASE-16668:
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Summary: Admin class should have a synchronous Admin#mergeRegions*
method
Key: HBASE-16668
URL: https://issues.apache.org/jira/browse/HBASE-16668
Project: HBase
Issue Type: Bug
Components: hbase
Affects Versions: 2.0.0
Reporter: Jonathan Hsieh
Fix For: 2.0.0
In trunk from HBASE-14552, we have deprecated {{void Admin#mergeRegions}} (in
1.x this was an asynchronous call) and replaced it with {{Future<Void>
Admin#mergeRegionsAsync}} which is clearly async.
This leaves us only with the async version.
We should have an easy way to make {{mergeRegions}} or an equivalant behave
synchronously.
For normal java Futures, we could just call the future's {{get()}} method.
Unforutnately, the future this method returns doesn't follow java Future
convention and throws Unimplemented operation when a plain {{get()}} is called
and makes the api harder to use and read. We could make this future act more
normally, and have the timeout throw an InterruptedException.
Alternately, we could expose a new method in {{Admin}} that behaves
synchronously such as {{HBaseAdmin#mergeRegionsSync}}. The caveat here is that
we shouldn't use the name {{#mergeRegions}} since it exists in 1.x with async
semantics.
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