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https://issues.apache.org/jira/browse/PIG-1881?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13004075#comment-13004075
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Alan Gates commented on PIG-1881:
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I don't want this to be a public interface at all, evolving or otherwise.
That's why it's marked limited private. The reason for the one off interface
is that this is a tool we think we should adopt and maintain.
> Need a special interface for Penny (Inspector Gadget)
> -----------------------------------------------------
>
> Key: PIG-1881
> URL: https://issues.apache.org/jira/browse/PIG-1881
> Project: Pig
> Issue Type: New Feature
> Components: impl
> Affects Versions: 0.9.0
> Reporter: Alan Gates
> Assignee: Laukik Chitnis
> Priority: Minor
> Fix For: 0.9.0
>
> Attachments: toolsserver.patch
>
>
> The proposed Penny tool needs access to Pig's new logical plan in order to
> inject code into the the dataflow. Once it has modified the plan it needs to
> then be able to hand back that modified plan and have Pig execute it.
> As we don't want to open this functionality up to general users, the proposal
> is to do this by subclasses PigServer with a new class that is marked as
> LimitedPrivate for Penny only. This class will provide calls to parse a Pig
> Latin script and return a logical plan, and one to take a logical plan and
> execute it.
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