Thanks for your response. If the calculation is based on the most recent summed value of field_a and the value of field_a in the update, how can I?
Thanks. -----Original Message----- From: Alexandre Rafalovitch [mailto:arafa...@gmail.com] Sent: Sunday, October 26, 2014 2:11 PM To: solr-user Subject: RE: suggestion for new custom atomic update Can't you do the calculation in custom UpdateRequestProcessor? Regards, Alex On 26/10/2014 4:17 am, "Elran Dvir" <elr...@checkpoint.com> wrote: > Hi all, > > Did anyone have a chance to review my idea? > > Thanks. > > -----Original Message----- > From: Elran Dvir > Sent: Monday, October 20, 2014 12:42 PM > To: solr-user > Subject: suggestion for new custom atomic update > > Hi all, > > This is my use case: > I have a stored field, field_a, which is atomic updated (let's say by > "inc"). field_a is stored but not indexed due to the large number of > distinct values it can have. > I need to index field_b (I need facet and stats on it) which is not in > the document but its value is based on a calculation of the recent (e.g. > summed) value of field_a. > There is no way to do it nowadays. > So I thought of a new method: custom atomic update. > > There will be a new interface in Solr: > > public interface CustomAtomicUpdater { > public void update(SolrInputDocument oldDoc, String fieldName, > Object > fieldVal) ; } > > There will be a new attribute for fields in schema.xml called > "customAtomicUpdateClass" (and all support in code, of course). > The value is a class which is an implementation of CustomAtomicUpdater. > In our example it will be defined for field_a. > > In method "getUpdatedDocument" in DistributedUpdateProcessor.java, we > will add handling of "custom" case: > > } else if ("custom".equals(key)) { > updateField = true; > SchemaField sf = schema.getField(sif.getName()); > String customAtomicUpdaterClassName = > sf.getCustomAtomicUpdaterClass(); > if (customAtomicUpdaterClassName == null) { > throw new SolrException(ErrorCode.BAD_REQUEST, "There is > no customAtomicUpdaterClass defined for " + sif + "."); > } > CustomAtomicUpdater updater = schema.getResourceLoader() > .newInstance(customAtomicUpdaterClassName, > CustomAtomicUpdater.class); > if (updater == null) { > throw new SolrException(ErrorCode.BAD_REQUEST, "Was > unable to create instance of " + customAtomicUpdaterClassName + "."); > } > updater.update(oldDoc, sif.getName(), fieldVal); > > } > > In my implementation I will sum field_a (oldvalue + newvalue) and > update field_b according to my logic. > > Example of use: > <add> > <doc> > <field name="field_a" update="custom">128</field> > </doc> > </add> > > What do say about my suggestion? > > Thanks. > Email secured by Check Point
