: I am trying to write some code to read rank data from external db, I saw : some example done using database - : http://sujitpal.blogspot.com/2011/05/custom-sorting-in-solr-using-external.html, ... : But is there any way to pass parameter or choose different database during : FieldComparator based on query. Lets say I want to pass versions, the sort : order in version 1 will be different then sort order in v2.
I would suggest that instead of trying to implement a custom sort, you instead look into implementing a custom ValueSourceParser -- this lets you define custom functions that can take input, and then use the function input to specify your query time variations. any registered function name can be sorted on. I think this article is still fairly accurate in terms of the internal APIs you need to implemnt... http://java.dzone.com/news/how-write-custom-solr ...or if you liked Sujit's blog on custom sorting, he has a more recent one on custom functions... http://sujitpal.blogspot.com/2013/03/solr-custom-ranking-with-function.html -Hoss
