I think you are missunderstanding what Himanshu is suggesting to you. You don't need to make lots of big changes ot the internals of solr's code to get what you want -- instead you can leverage the Atomic Updates & Optimistic Concurrency features of Solr to get the existing internal Solr to reject any attempts to add a duplicate documentunless the client code sending the document specifies it should be an "update".
This means your client code needs to be a bit more sophisticated, but the benefit is that you don't have to try to make complex changes to the internals of Solr that may be impossible and/or difficult to support/upgrade later. More details... https://cwiki.apache.org/confluence/display/solr/Updating+Parts+of+Documents#UpdatingPartsofDocuments-OptimisticConcurrency Simplest possible idea based on the basic info you have given so far... 1) send every doc using _version_=-1 2a) if doc update fails with error 409, that means a version of this doc already exists 2b) resend just the field changes (using "set" atomic operation) and specify _version_=1 : Dear Himanshu, : Hi, : You misunderstood what I meant. I am not going to update some field. I am : going to change what Solr do on duplication of uniquekey field. I dont want : to solr overwrite Whole document I just want to overwrite some parts of : document. This situation does not come from user side this is what solr do : to documents with duplicated uniquekey. : Regards. : : : On Tue, Jul 8, 2014 at 12:29 PM, Himanshu Mehrotra < : himanshu.mehro...@snapdeal.com> wrote: : : > Please look at https://wiki.apache.org/solr/Atomic_Updates : > : > This does what you want just update relevant fields. : > : > Thanks, : > Himanshu : > : > : > On Tue, Jul 8, 2014 at 1:09 PM, Ali Nazemian <alinazem...@gmail.com> : > wrote: : > : > > Dears, : > > Hi, : > > According to my requirement I need to change the default behavior of Solr : > > for overwriting the whole document on unique-key duplication. I am going : > to : > > change that the overwrite just part of document (some fields) and other : > > parts of document (other fields) remain unchanged. First of all I need to : > > know such changing in Solr behavior is possible? Second, I really : > > appreciate if you can guide me through what class/classes should I : > consider : > > for changing that? : > > Best regards. : > > : > > -- : > > A.Nazemian : > > : > : : : : -- : A.Nazemian : -Hoss http://www.lucidworks.com/
