org.springframework.messaging.rsocket

Interface MetadataExtractor

All Known Implementing Classes:

DefaultMetadataExtractor

public interface MetadataExtractor

Strategy to extract a map of value(s) from Payload metadata, which could be composite metadata with multiple entries. Each metadata entry is decoded based on its MimeType and a name is assigned to the decoded value. The resulting name-value pairs can be added to the headers of a Message.

Since:

5.2

Author:

Rossen Stoyanchev

See Also:

MetadataExtractorRegistry

Field Summary

Fields

Modifier and Type	Field and Description
static String	ROUTE_KEY The key to assign to the extracted "route" of the payload.

Method Summary

Modifier and Type	Method and Description
Map<String,Object>	extract(Payload payload, MimeType metadataMimeType) Extract a map of values from the given Payload metadata.

Field Detail

ROUTE_KEY

static final String ROUTE_KEY

The key to assign to the extracted "route" of the payload.

See Also:

Constant Field Values

Method Detail

extract

Map<String,Object> extract(Payload payload,
                           MimeType metadataMimeType)

Extract a map of values from the given Payload metadata. The Payload "route", if present, should be saved under ROUTE_KEY.

Parameters:

payload - the payload whose metadata should be read

metadataMimeType - the metadata MimeType for the connection.

Returns:

name values pairs extracted from the metadata

Throws:

DecodingException - if the metadata cannot be decoded

IllegalArgumentException - if routing metadata cannot be decoded