Using ingest processors in Painlessedit
Some ingest processors expose behavior through Painless methods that can be called in Painless scripts that execute in ingest pipelines.
Method usageedit
All ingest methods available in Painless are scoped to the Processors
namespace. For example:
POST /_ingest/pipeline/_simulate?verbose { "pipeline": { "processors": [ { "script": { "lang": "painless", "source": """ long bytes = Processors.bytes(ctx.size); ctx.size_in_bytes = bytes; """ } } ] }, "docs": [ { "_source": { "size": "1kb" } } ] }
Ingest methods referenceedit
Byte conversionedit
Use the bytes processor to return the number of
bytes in the human-readable byte value supplied in the value
parameter.
long bytes(String value);
Lowercase conversionedit
Use the lowercase processor to convert the
supplied string in the value
parameter to its lowercase equivalent.
String lowercase(String value);
Uppercase conversionedit
Use the uppercase processor to convert the
supplied string in the value
parameter to its uppercase equivalent.
String uppercase(String value);
JSON parsingedit
Use the JSON processor to convert JSON strings to structured
JSON objects. The first json
method accepts a map and a key. The processor converts
the JSON string in the map as specified by the key
parameter to structured JSON content.
That content is added directly to the map
object.
The second json
method accepts a JSON string in the value
parameter and
returns a structured JSON object.
void json(Map<String, Object> map, String key); Object json(Object value);
You can then add this object to the document through the context object:
Object json = Processors.json(ctx.inputJsonString); ctx.structuredJson = json;
URL decodingedit
Use the URL decode processor to URL-decode the string
supplied in the value
parameter.
String urlDecode(String value);