When using HTTP-PATCH Resources in JAX-RS on Wildfly (tested with 14 and 18), some automagic happens that calls the same resource path using GET, applies the changes from the JSON-PATCH and calls the actual method with the result.

The actual ContainerRequestFilter is Resteasy/PatchMethodFilter.java at master · resteasy/Resteasy · GitHub

This is pretty cool in general, however, I have some szenarios in which I am more interested in the patch itself (i.e. generating LDAP modify requests). Is there some way to disable the PatchMethodFilter for specific resources or a single deployment/whole app?

I have created a sample resource class demonstrating the issue (see also my question on stackoverflow.com: java - Is there a way to disable automatic JSON PATCH application in Wildfly - Stack Overflow ):

package so;

import javax.json.Json;
import javax.json.JsonArray;
import javax.json.JsonObject;
import javax.json.JsonPatch;
import javax.json.JsonStructure;
import javax.ws.rs.Consumes;
import javax.ws.rs.GET;
import javax.ws.rs.PATCH;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.WebApplicationException;
import javax.ws.rs.core.MediaType;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.Response.Status;

@Path( "/" )
public class MyPatchResource
{
   public static class Data
   {
      public String name;
      public int  age;
   }

   @GET
   @Produces( MediaType.APPLICATION_JSON )
   @Path( "auto/{name}" )
   public Data read( @PathParam( "name" ) String name )
   {
   Data result = new Data();
      result.name = name;
      result.age = 42;
      return result;
   }

   @PATCH
   @Path( "auto/{name}" )
   @Consumes( MediaType.APPLICATION_JSON_PATCH_JSON )
   @Produces( MediaType.APPLICATION_JSON )
   public Data patchAuto( Data patched )
   {
       return patched;
   }

   @PATCH
   @Path( "manual/{name}" )
   @Consumes( MediaType.APPLICATION_JSON_PATCH_JSON )
   @Produces( MediaType.APPLICATION_JSON )
   public JsonObject patchManual( @PathParam( "name" ) String name, JsonStructure patch )
   {
      if ( !(patch instanceof JsonArray) )
      {
         throw new WebApplicationException( Response.status( Status.BAD_REQUEST )
                 .type( MediaType.TEXT_PLAIN )
                 .entity( "not a json patch: " + patch )
                 .build() );
      }

      JsonPatch jsonPatch = Json.createPatch( patch.asJsonArray() );
      JsonObject original = readManual( name );

      return jsonPatch.apply( original );
   }

   @GET
   @Path( "manual/{name}" )
   @Produces( MediaType.APPLICATION_JSON )
   public JsonObject readManual( @PathParam( "name" ) String name )
   {
      return Json.createObjectBuilder()
              .add( "name", name )
              .add( "age", 42 )
              .build();
   }
}