Module io.fluxzero.sdk
Package io.fluxzero.sdk.tracking.handling

Class MetadataParameterResolver

java.lang.Object
io.fluxzero.common.handling.TypedParameterResolver<Object>
io.fluxzero.sdk.tracking.handling.MetadataParameterResolver
All Implemented Interfaces:
io.fluxzero.common.handling.ParameterResolver<Object>
public class MetadataParameterResolver extends io.fluxzero.common.handling.TypedParameterResolver<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");
 }