[jira] [Updated] (HBASE-4448) HBaseTestingUtilityFactory - pattern for re-using HBaseTestingUtility instances across unit tests

["Doug Meil (JIRA)" <ji...@apache.org>]

     [ https://issues.apache.org/jira/browse/HBASE-4448?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Doug Meil updated HBASE-4448:
-----------------------------

    Attachment: HBaseTestingUtilityFactory.java

> HBaseTestingUtilityFactory - pattern for re-using HBaseTestingUtility instances across unit tests
> -------------------------------------------------------------------------------------------------
>
>                 Key: HBASE-4448
>                 URL: https://issues.apache.org/jira/browse/HBASE-4448
>             Project: HBase
>          Issue Type: Improvement
>            Reporter: Doug Meil
>            Assignee: Doug Meil
>            Priority: Minor
>         Attachments: HBaseTestingUtilityFactory.java
>
>
> Setting up and tearing down HBaseTestingUtility instances in unit tests is very expensive.  On my MacBook it takes about 10 seconds to set up a MiniCluster, and 7 seconds to tear it down.  When multiplied by the number of test classes that use this facility, that's a lot of time in the build.
> This factory assumes that the JVM is being re-used across test classes in the build, otherwise this pattern won't work. 
> I don't think this is appropriate for every use, but I think it can be applicable in a great many cases - especially where developers just want a simple MiniCluster with 1 slave.

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