UUIDUpdateProcessorFactory (Solr 9.6.0 core API)

java.lang.Object
- org.apache.solr.update.processor.UpdateRequestProcessorFactory
- - org.apache.solr.update.processor.UUIDUpdateProcessorFactory

All Implemented Interfaces:

NamedListInitializedPlugin
```
public class UUIDUpdateProcessorFactory
extends UpdateRequestProcessorFactory
```
An update processor that adds a newly generated UUID value to any document being added that does not already have a value in the specified field.
In the example configuration below, if a document does not contain a value in the id field, a new UUID will be generated and added as the value of that field.
```
 <processor class="solr.UUIDUpdateProcessorFactory">
   <str name="fieldName">id</str>
 </processor>
 
```
You can also invoke the processor with request handler param(s) as uuid.fieldname with processor=uuid curl -X POST -H Content-Type: application/json http://localhost:8983/solr/test/update/json/docs?processor=uuid;ampersand;uuid.fieldName=id;ampersand;commit=true --data-binary {"id":"1","title": "titleA"}
NOTE: The param(s) provided in request handler will override / supersede processor's config.
If field name is omitted in processor configuration and not provided in request handler param(s), then IndexSchema.getUniqueKeyField() is used as field and a new UUID will be generated and added as the value of that field. The field type of the uniqueKeyField must be anything which accepts a string or UUID value.
Since:

4.0.0

See Also:

UUID

Nested Class Summary
- Nested classes/interfaces inherited from class org.apache.solr.update.processor.UpdateRequestProcessorFactory
  UpdateRequestProcessorFactory.RunAlways

Field Summary

Fields
Modifier and Type Field Description

protected String fieldName

static String NAME

Constructor Summary

Constructors
Constructor Description

UUIDUpdateProcessorFactory()

Method Summary

All Methods Instance Methods Concrete Methods
Modifier and Type	Method	Description
`UpdateRequestProcessor`	`getInstance(SolrQueryRequest req, SolrQueryResponse rsp, UpdateRequestProcessor next)`
`void`	`init(org.apache.solr.common.util.NamedList<?> args)`	`init` will be called just once, immediately after creation.

Methods inherited from class java.lang.Object
clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

- Field Detail
  - NAME
```
public static final String NAME
```
    See Also:
    
    Constant Field Values
  - fieldName
```
protected String fieldName
```
- Constructor Detail
  - UUIDUpdateProcessorFactory
```
public UUIDUpdateProcessorFactory()
```
- Method Detail
  - init
```
public void init(org.apache.solr.common.util.NamedList<?> args)
```
    Description copied from interface: NamedListInitializedPlugin
    
    init will be called just once, immediately after creation.
    Source of the initialization arguments will typically be solrconfig.xml, but will ultimately depends on the plugin itself
    
    Parameters:
    
    args - non-null list of initialization parameters (may be empty)
  - getInstance
```
public UpdateRequestProcessor getInstance(SolrQueryRequest req,
                                          SolrQueryResponse rsp,
                                          UpdateRequestProcessor next)
```
    Specified by:
    
    getInstance in class UpdateRequestProcessorFactory