Field transformer (FIT)

DataStax Enterprise (DSE) supports using a field input/output transformer (FIT) API.

A field input/output transformer, an alternative for handling update requests, is executed later than a URP at indexing time. See the DataStax Developer Blog post An Introduction to DSE Field Transformers.

The DSE custom URP implementation is deprecated.

DSE custom URP provided similar functionality to the Solr URP chain, but appeared as a plugin to Solr. The classic URP is invoked when updating a document using HTTP and the custom URP is invoked when updating a table using DSE. If both classic and custom URPs are configured, the classic version is executed first. The custom URP chain and the FIT API work with CQL and HTTP updates.

Examples are provided for using the field input/output transformer API and the deprecated custom URP.

Field input/output (FIT) transformer API

Steps to use the field input/output transformer API as an option to the input/output transformer support in Apache Solr.

FIT transformer class examples

Field input and output transformer (FIT) class examples.

Custom URP example (deprecated)

The custom update request processor (URP) extends the Apache Solr™ URP.

Interface for custom field types

The CustomFieldType interface marks Apache Solr custom field types and provides their actual stored field type.

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