Class DefaultMetadataExtractor

java.lang.Object

org.springframework.messaging.rsocket.DefaultMetadataExtractor

All Implemented Interfaces:

MetadataExtractor, MetadataExtractorRegistry

public class DefaultMetadataExtractor
extends Object
implements MetadataExtractor, MetadataExtractorRegistry

Default MetadataExtractor implementation that relies on Decoders to deserialize the content of metadata entries.

By default only "message/x.rsocket.routing.v0" is extracted and saved under MetadataExtractor.ROUTE_KEY. Use metadataToExtract methods to specify other metadata mime types of interest to extract.

Since:

5.2

Author:

Rossen Stoyanchev

Field Summary

Fields inherited from interface org.springframework.messaging.rsocket.MetadataExtractor

ROUTE_KEY

Constructor Summary

Constructors

Constructor	Description
DefaultMetadataExtractor(List<Decoder<?>> decoders)	Constructor with list of decoders for de-serializing metadata entries.
DefaultMetadataExtractor(Decoder<?>... decoders)	Constructor with decoders for de-serializing metadata entries.

Method Summary

Modifier and Type	Method	Description
Map<String,Object>	extract(io.rsocket.Payload payload, MimeType metadataMimeType)	Extract a map of values from the given Payload metadata.
List<? extends Decoder<?>>	getDecoders()	Return a read-only list with the configured decoders.
<T> void	metadataToExtract(MimeType mimeType, Class<T> targetType, BiConsumer<T, Map<String,Object>> mapper)	Variant of MetadataExtractorRegistry.metadataToExtract(MimeType, Class, String) that allows custom logic to be used to map the decoded value to any number of values in the output map.
<T> void	metadataToExtract(MimeType mimeType, ParameterizedTypeReference<T> type, BiConsumer<T, Map<String,Object>> mapper)	Variant of MetadataExtractorRegistry.metadataToExtract(MimeType, Class, BiConsumer) that accepts ParameterizedTypeReference instead of Class for specifying a target type with generic parameters.

Methods inherited from class java.lang.Object

clone, equals, finalize, getClass, hashCode, notify, notifyAll, toString, wait, wait, wait

Methods inherited from interface org.springframework.messaging.rsocket.MetadataExtractorRegistry

metadataToExtract, metadataToExtract

Constructor Details

DefaultMetadataExtractor

public DefaultMetadataExtractor(Decoder<?>... decoders)

Constructor with decoders for de-serializing metadata entries.

DefaultMetadataExtractor

public DefaultMetadataExtractor(List<Decoder<?>> decoders)

Constructor with list of decoders for de-serializing metadata entries.

Method Details

getDecoders

public List<? extends Decoder<?>> getDecoders()

Return a read-only list with the configured decoders.

metadataToExtract

public <T> void metadataToExtract(MimeType mimeType,
 Class<T> targetType,
 BiConsumer<T, Map<String,Object>> mapper)

Description copied from interface: MetadataExtractorRegistry

Variant of MetadataExtractorRegistry.metadataToExtract(MimeType, Class, String) that allows custom logic to be used to map the decoded value to any number of values in the output map.

Specified by:

metadataToExtract in interface MetadataExtractorRegistry

Type Parameters:

T - the target value type

Parameters:

mimeType - the mime type of metadata entries to extract

targetType - the target value type to decode to

mapper - custom logic to add the decoded value to the output map

metadataToExtract

public <T> void metadataToExtract(MimeType mimeType,
 ParameterizedTypeReference<T> type,
 BiConsumer<T, Map<String,Object>> mapper)

Description copied from interface: MetadataExtractorRegistry

Variant of MetadataExtractorRegistry.metadataToExtract(MimeType, Class, BiConsumer) that accepts ParameterizedTypeReference instead of Class for specifying a target type with generic parameters.

Specified by:

metadataToExtract in interface MetadataExtractorRegistry

Type Parameters:

T - the target value type

Parameters:

mimeType - the mime type of metadata entries to extract

type - the target value type to decode to

mapper - custom logic to add the decoded value to the output map

extract

public Map<String,Object> extract(io.rsocket.Payload payload,
 MimeType metadataMimeType)

Description copied from interface: MetadataExtractor

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

Specified by:

extract in interface MetadataExtractor

Parameters:

payload - the payload whose metadata should be read

metadataMimeType - the metadata MimeType for the connection.

Returns:

name values pairs extracted from the metadata