[ http://issues.apache.org/jira/browse/NUTCH-49?page=comments#action_63531
]
Doug Cutting commented on NUTCH-49:
-----------------------------------
This seems like reasonable functionality to add.
However the code needs a little cleanup. We should at least use constants for
the different modes. Better yet would be to use a type-safe enumeration, e.g.,
a nested class like:
public static final class Fetch {
private String name;
private Fetch(String name) { this.name = name}
public String toString() {
return this.getClass().getName()+":"+name;
}
public static final Mode ALL = new Mode("ALL");
public static final Mode NEW = new Mode("NEW");
public static final Mode OLD = new Mode("OLD");
}
Then fetch with something like:
new FetchListTool(..., Fetch.ALL, ...);
...
The above code is of course untested, needs javadoc, etc.
Doug
> Flag for generate to fetch only new pages to complement the -refetchonly flag
> -----------------------------------------------------------------------------
>
> Key: NUTCH-49
> URL: http://issues.apache.org/jira/browse/NUTCH-49
> Project: Nutch
> Type: New Feature
> Components: fetcher
> Reporter: Luke Baker
> Priority: Minor
> Attachments: fetchnewonly.patch
>
> It would be useful, especially for research/testing purposes, to have a flag
> for the FetchListTool that make sure to only include URLs in the fetchlist
> that have not already been fetched (according to the information from the
> webdb that you're generating the fetchlist from).
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