第 23 章 Extract Field Action

Extract a field from the message body.

The extract field action expects an application/json content type.

The field parameter specifies which field in the JSON to extract. By default, the message body is overridden with the extracted field.

The optional parameter headerOutput specifies whether the extracted field should be stored in a message header named 'CamelKameletsExtractFieldName', leaving the message body untouched.

The optional parameter headerOutputName specifies a custom header name instead of the default 'CamelKameletsExtractFieldName'. This parameter must be used in conjunction with headerOutput. If no headerOutputName parameter is provided, the default 'CamelKameletsExtractFieldName' is used.

The optional parameter strictHeaderCheck enables a strict header name check. If enabled, the action checks if the header output name (custom or default) is already used in the exchange. If so, the extracted field is stored in the message body, if not, the extracted field is stored in the selected header (custom or default).

The headerOutput/headerOutputName/strictHeaderCheck parameters are particulary useful in case you would like to reuse an extracted field as parameter for another header, for example.