Nutch Topical / Focused Crawl

[MyD ()]

Hi @ all,

I'd like to turn Nutch into an focused / topical crawler. I started to analyze the code and think that I found the right peace of code. I just wanted to know if I am on the right track. I think the right peace of code to implement a decision to fetch further is in the method output of the Fetcher class every time we call the collect method of the OutputCollector object.

private ParseStatus output(Text key, CrawlDatum datum, Content content, ProtocolStatus pstatus, int status) {
...
output.collect(...);
...
}

Would you mind to let me know the the best way to turn this decision into an plugin? I was thinking to go a similar way like the scoring filters. Thanks in advance.

Cheers,
MyD

[MyD]

I just found an interesting thesis which explains how to turn / modify Nutch into a focused / topical crawler. This thesis helped me a lot. Maybe useful to others...

http://wing.comp.nus.edu.sg/publications/theses/2009/markusHaenseThesis.pdf

MyD wrote:

Hi @ all,

I'd like to turn Nutch into an focused / topical crawler. I started to analyze the code and think that I found the right peace of code. I just wanted to know if I am on the right track. I think the right peace of code to implement a decision to fetch further is in the method output of the Fetcher class every time we call the collect method of the OutputCollector object.

private ParseStatus output(Text key, CrawlDatum datum, Content content, ProtocolStatus pstatus, int status) {
...
output.collect(...);
...
}

Would you mind to let me know the the best way to turn this decision into an plugin? I was thinking to go a similar way like the scoring filters. Thanks in advance.

Cheers,
MyD