[jira] [Commented] (OOZIE-1740) Add a new function hadoop:conf() that can be invoked from the workflow.xml and will return a hadoop configuration option

["sam liu (JIRA)" <ji...@apache.org>]

    [ https://issues.apache.org/jira/browse/OOZIE-1740?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14015466#comment-14015466 ] 

sam liu commented on OOZIE-1740:
--------------------------------

Hi Robert,

Sorry for responsing so late. According your comments, I tried 'Services.get().get(HadoopAccessorService.class).createJobConf(hostPort)' and it really works well to current EL function. Now my function looks like:
    public static String hadoop_conf(String hadoopConfHostPort, String propName) {
    	Configuration conf = Services.get().get(HadoopAccessorService.class).createJobConf(hadoopConfHostPort);
    	String prop = conf.get(propName);
    	if(prop == null || prop.equals("")){
    		conf = new Configuration();
    		prop = conf.get(propName);
    	}
      return conf.get(propName);
    }

And in the workflow.xml, we should invoke the EL function like:
    <property>
         <name>mapreduce.map.java.opts</name>
         <value>${hadoop:conf('jobtracker.host:9001', 'mapreduce.map.java.opts')} -Xss512k </value>
     </property>

I did some tests and this could return expected results. 

Now I am studying how to implement regarding coordinator EL functions. Will let you know if have any progress.

Please let me know if any comments/suggestions. Thanks a lot!




> Add a new function hadoop:conf() that can be invoked from the workflow.xml and will return a hadoop configuration option
> ------------------------------------------------------------------------------------------------------------------------
>
>                 Key: OOZIE-1740
>                 URL: https://issues.apache.org/jira/browse/OOZIE-1740
>             Project: Oozie
>          Issue Type: Improvement
>          Components: workflow
>    Affects Versions: trunk, 3.3.2
>            Reporter: sam liu
>            Assignee: sam liu
>         Attachments: OOZIE-1740.patch, OOZIE-1740.patch
>
>




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