Class MetadataParameterResolver

java.lang.Object

io.fluxzero.sdk.tracking.handling.MetadataParameterResolver

public class MetadataParameterResolver
extends Object

Resolves handler method parameters of type Metadata.

This resolver can inject metadata into handler methods in two ways:

• If the message being handled implements HasMetadata, its metadata is directly returned.
• Otherwise, the metadata is extracted from the current DeserializingMessage (if available).

Example handler:

@HandleCommand
public void handle(MyCommand command, Metadata metadata) {
    String user = metadata.get("userId");
}

Constructor Summary

Constructors

Constructor	Description
MetadataParameterResolver()

Method Summary

Modifier and Type	Method	Description
default boolean	determinesSpecificity()
Object	getInputCacheKey(Parameter parameter, Annotation methodAnnotation, io.fluxzero.common.handling.HandlerInput<Object> representative)
boolean	isNoMatchPayloadClassKey(Parameter parameter, Annotation methodAnnotation, io.fluxzero.common.handling.HandlerInput<Object> representative)
boolean	isPayloadClassKey(Parameter parameter, Annotation methodAnnotation, io.fluxzero.common.handling.HandlerInput<Object> representative)
default boolean	matches(Parameter arg0, Annotation arg1, Object arg2)
boolean	matches(Parameter arg0, Annotation arg1, Object arg2)
default boolean	mayApply(Executable arg0, Class<?> arg1)
boolean	mayApply(Executable arg0, Class<?> arg1)
Function<Object,Object>	prepare(Parameter parameter, Annotation methodAnnotation)
io.fluxzero.common.handling.HandlerInputResolver.Resolution<Object>	prepareInput(Parameter parameter, Annotation methodAnnotation, io.fluxzero.common.handling.HandlerInput<Object> representative)
Function<Object,Object>	resolve(Parameter p, Annotation methodAnnotation)
default int	specificityPriority()
default boolean	test(Object arg0, Parameter arg1)

Methods inherited from class Object

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

Constructor Details

MetadataParameterResolver

public MetadataParameterResolver()

Method Details

resolve

public Function<Object,Object> resolve(Parameter p,
 Annotation methodAnnotation)

prepare

public Function<Object,Object> prepare(Parameter parameter,
 Annotation methodAnnotation)

getInputCacheKey

public Object getInputCacheKey(Parameter parameter,
 Annotation methodAnnotation,
 io.fluxzero.common.handling.HandlerInput<Object> representative)

isPayloadClassKey

public boolean isPayloadClassKey(Parameter parameter,
 Annotation methodAnnotation,
 io.fluxzero.common.handling.HandlerInput<Object> representative)

isNoMatchPayloadClassKey

public boolean isNoMatchPayloadClassKey(Parameter parameter,
 Annotation methodAnnotation,
 io.fluxzero.common.handling.HandlerInput<Object> representative)

prepareInput

public io.fluxzero.common.handling.HandlerInputResolver.Resolution<Object> prepareInput(Parameter parameter,
 Annotation methodAnnotation,
 io.fluxzero.common.handling.HandlerInput<Object> representative)

matches

default boolean matches(Parameter arg0,
 Annotation arg1,
 Object arg2)

determinesSpecificity

default boolean determinesSpecificity()

specificityPriority

default int specificityPriority()

test

default boolean test(Object arg0,
 Parameter arg1)

mayApply

default boolean mayApply(Executable arg0,
 Class<?> arg1)

matches

public boolean matches(Parameter arg0,
 Annotation arg1,
 Object arg2)

mayApply

public boolean mayApply(Executable arg0,
 Class<?> arg1)