Error using RestResponse from RestEasy Reactive library

Question

I am trying to use the RestResponse<T> object from org.jboss.resteasy.reactive on the return of my application resources since the javax.ws.rs.core.Response doesn't provide the generic type.

I am getting the error when I call this endpoint:

public RestResponse<List<SampleResponse>> findAll() {
    return ResponseBuilder.ok(sampleService.findAll()).build();
}

The error:

Request failed: java.lang.ClassCastException: class org.jboss.resteasy.core.providerfactory.ResteasyProviderFactoryImpl cann
ot be cast to class org.jboss.resteasy.reactive.common.jaxrs.RuntimeDelegateImpl (org.jboss.resteasy.core.providerfactory.ResteasyProviderFactoryImpl and org.jboss.resteasy.reactive.common.jaxrs.RuntimeDelegateImpl are in unnamed mo
dule of loader io.quarkus.bootstrap.classloading.QuarkusClassLoader @3c153a1)

My dependencies in pom.xml:

<dependencies>
  <dependency>
    <groupId>io.quarkus</groupId>
    <artifactId>quarkus-hibernate-orm</artifactId>
  </dependency>
  <dependency>
    <groupId>io.quarkus</groupId>
    <artifactId>quarkus-hibernate-validator</artifactId>
  </dependency>
  <dependency>
    <groupId>io.quarkus</groupId>
    <artifactId>quarkus-rest-client</artifactId>
  </dependency>
  <dependency>
    <groupId>io.quarkus</groupId>
    <artifactId>quarkus-smallrye-openapi</artifactId>
  </dependency>
  <dependency>
    <groupId>io.quarkus</groupId>
    <artifactId>quarkus-resteasy-reactive-jackson</artifactId>
  </dependency>
  <dependency>
    <groupId>io.quarkus</groupId>
    <artifactId>quarkus-liquibase</artifactId>
  </dependency>
  <dependency>
    <groupId>io.quarkus</groupId>
    <artifactId>quarkus-smallrye-health</artifactId>
  </dependency>
  <dependency>
    <groupId>io.quarkus</groupId>
    <artifactId>quarkus-redis-client</artifactId>
  </dependency>
  <dependency>
    <groupId>io.quarkus</groupId>
    <artifactId>quarkus-arc</artifactId>
  </dependency>
  <dependency>
    <groupId>io.quarkus</groupId>
    <artifactId>quarkus-rest-client-jackson</artifactId>
  </dependency>
  <dependency>
    <groupId>io.quarkus</groupId>
    <artifactId>quarkus-config-yaml</artifactId>
  </dependency>
  <dependency>
    <groupId>io.quarkus</groupId>
    <artifactId>quarkus-junit5</artifactId>
    <scope>test</scope>
  </dependency>
  <dependency>
    <groupId>io.quarkus</groupId>
    <artifactId>quarkus-spring-data-jpa</artifactId>
  </dependency>
  <dependency>
    <groupId>org.projectlombok</groupId>
    <artifactId>lombok</artifactId>
    <version>${lombok.version}</version>
    <scope>compile</scope>
  </dependency>
  <dependency>
    <groupId>io.quarkus</groupId>
    <artifactId>quarkus-jdbc-postgresql</artifactId>
  </dependency>
  <dependency>
    <groupId>io.quarkus</groupId>
    <artifactId>quarkus-spring-web</artifactId>
  </dependency>
  <dependency>
    <groupId>io.quarkus</groupId>
    <artifactId>quarkus-resteasy-reactive</artifactId>
  </dependency>
</dependencies>

Answer 1

I just solved the problem... It was the order of dependecies. I switched quarkus-resteasy-reactive to the top and it is working now.

Answer 2

With RESTEasy Reactive, you should use quarkus-rest-client-reactive . quarkus-rest-client may bring some RESTEasy classic classes that conflict with the reactive version