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https://issues.apache.org/jira/browse/MAPREDUCE-777?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12746014#action_12746014
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Tom White commented on MAPREDUCE-777:
-------------------------------------
I think we can support the use case Todd mentioned above with a relatively
small change (and without resorting to aspects). Change the JobClient
constructors to static factory methods:
{code}
public JobClient() { ... }
public JobClient(Configuration conf) throws IOException { ... }
{code}
becomes
{code}
public static JobClient get() { ... }
public static JobClient get(Configuration conf) throws IOException { ... }
{code}
Then at a later point we can change the implementation of the static methods to
return a custom implementation of JobClient, without having to change
JobClient's API.
> A method for finding and tracking jobs from the new API
> -------------------------------------------------------
>
> Key: MAPREDUCE-777
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-777
> Project: Hadoop Map/Reduce
> Issue Type: New Feature
> Components: client
> Reporter: Owen O'Malley
> Assignee: Amareshwari Sriramadasu
> Fix For: 0.21.0
>
> Attachments: patch-777-1.txt, patch-777-2.txt, patch-777.txt
>
>
> We need to create a replacement interface for the JobClient API in the new
> interface. In particular, the user needs to be able to query and track jobs
> that were launched by other processes.
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