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https://issues.apache.org/jira/browse/HIVE-617?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12737261#action_12737261
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Edward Capriolo commented on HIVE-617:
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I follow what you are saying.
We may not need to add a helper class for the user. The user that would be
using this is likely advanced and should/would use the OptionsProcessor and
SessionState as they see fit.
A reason I could see for creating HiveShell is we would like to retrofit all
the current tools cli, lineage, hwi to fit into some interface ensure that the
SessionState, hive history, and etc is started up properly.
My use case is to be able to launch a class that can start a map/reduce program
with the hadoop API and then execute a query with the hive API. I am using
GregorianCalendar and date processing to figure out what files/partition to
operate on, building hive strings and executing them directly with the
QueryProcessor.
It seems some people are using a combination of bash|perl|python and hive
-e|-f. Other then my reliance on cron to start off these jobs, I am 100% pure
Java.
This tiny shell script is my entry point. For me, it does not need more
sophistication but I could be missing something.
> Script to start classes with hadoop and hive environment
> --------------------------------------------------------
>
> Key: HIVE-617
> URL: https://issues.apache.org/jira/browse/HIVE-617
> Project: Hadoop Hive
> Issue Type: New Feature
> Components: Clients
> Reporter: Edward Capriolo
> Assignee: Edward Capriolo
> Priority: Minor
> Attachments: hive-617.2.patch, hive-617.3.diff, hive-617.patch,
> TestHive.java
>
>
> At times it may be required to write a process that uses both the Hadoop and
> Hive environment and API. For example, someone may write an application that
> uses the HIVE api directly. This patch will add a more generic --jar
> extension that can start any class with the proper environment.
> RUNJAR=/opt/hive/lib/hive_hwi.jar RUNCLASS=test.TestHive hive --service jar
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