Atomic update of SOLR/SOLRJ

Lucene itself does not have much of an introduction to atomic updates, but SOLR encapsulates them, and here's a simple introduction, which is useful for indexing. This is used in the code as follows:

2. /**
4. * Atomic update mode
6.  * */
8. public  static  void  updatesolrfield () throws  exception{  
10.      Solrinputdocument doc = new  solrinputdocument ();   
12.      DOC  . AddField (" id ",  " ); span class= "comment" style= "padding:0px; margin:0px; Color:rgb (0,130,0); Width:auto; border:0px ">//uniquely identifies    by ID;
14.     Map< string,string> map= new   Hashmap<string, string> ();   
16.      Map.put (,  " new Field ""; //into a supported operation, for multi-range pipe  , add field 
18. //map.put ("Set", "updated field");//For single-valued and multi-range Works, update field
20. //map.put ("Inc", "100");//Put a supported operation on a numeric field
22. Sd.addfield ("name", map);
24. Server.add (SD);
26. Server.commit ();
28. System.out.println ("Atomic update succeeded!") ");
30. }

note, of course, that the field of the operation must be stored (store= "true"), otherwise the updated index will overwrite the previous index.

Atomic update of SOLR/SOLRJ