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https://issues.apache.org/jira/browse/NUTCH-1405?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13406559#comment-13406559
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Markus Jelsma commented on NUTCH-1405:
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This introduces some ambiguity. There are some possibilities such as ignore
update of overwrite is false which would imply the following rules:
db.injector.overwrite=true && db.injector.update=false ==> overwrite
db.injector.overwrite=true && db.injector.update=true ==> update
db.injector.overwrite=false && db.injector.update=false ==> keep existing
db.injector.overwrite=false && db.injector.update=true ==> keep existing
or a problem:
db.injector.overwrite=true && db.injector.update=false ==> overwrite
db.injector.overwrite=true && db.injector.update=true ==> <WHAT TO DO>
db.injector.overwrite=false && db.injector.update=false ==> keep existing
db.injector.overwrite=false && db.injector.update=true ==> update
I'd propose update to be ignored is overwrite is false.
> Allow to overwrite CrawlDatum's with injected entries
> -----------------------------------------------------
>
> Key: NUTCH-1405
> URL: https://issues.apache.org/jira/browse/NUTCH-1405
> Project: Nutch
> Issue Type: Improvement
> Components: injector
> Affects Versions: 1.5, 1.6
> Reporter: Markus Jelsma
> Assignee: Markus Jelsma
> Priority: Minor
> Fix For: 1.6
>
> Attachments: NUTCH-1405-1.6-3.patch, NUTCH-1405-1.6-4.patch,
> NUTCH-1405-1.6-5.patch, NUTCH-1405-1.6-6.patch
>
>
> Injector's reducer does not permit overwriting existing CrawlDatum entries.
> It is, however, useful to optionally overwrite so users can reset metadata
> manually.
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