RESTEasy Java 11, Tomcat 10.1 How to deploy an run - maven

Question

Since days i'm googling for a working solution on how to deploy an run a RESTEasy JAX-RS test application.
It has to run on at least Java 11 and Tomcat 10.1 using the most actual JAX-RS and RESTEasy version.
Regardless what i'm trying getting it up and running, each URL call to - as example -
http://localhost:8080/NetworkManagement/network-management/configurations ends with error 404.
Please, could anyone give me a hint or solution for this?
The since the actual last try used code fragments are posted in the next posts - Eclipse 22.06 maven project:
pom.xml
<?xml version="1.0" encoding="UTF-8"?><project xmlns="http://maven.apache.org/POM/4.0.0" xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
<modelVersion>4.0.0</modelVersion>
<parent>
<artifactId>ParentServer</artifactId>
<groupId>com.gncc.srv</groupId>
<version>0.0.1-SNAPSHOT</version>
</parent>
<artifactId>api.rest</artifactId>
<packaging>war</packaging>
<name>GNCC Base Rest Api Server</name>
<!-- FIXME change it to the project's website -->
<url>http://localhost:8080</url>
<properties>
<project.build.sourceEncoding>UTF-8</project.build.sourceEncoding>
<maven.compiler.source>11</maven.compiler.source>
<maven.compiler.target>11</maven.compiler.target>
<swagger-core-version>2.0.9</swagger-core-version>
<jackson-version>2.11.2</jackson-version>
<jetty-version>9.2.9.v20150224</jetty-version>
<resteasy-version>3.15.3.Final</resteasy-version>
<resteasy-servlet>6.2.2.FINAL</resteasy-servlet>
<slf4j-version>1.6.3</slf4j-version>
<junit-version>4.13.1</junit-version>
<servlet-api-version>4.0.4</servlet-api-version>
<jakarta-annotation-version>1.3.5</jakarta-annotation-version>
<beanvalidation-version>2.0.2</beanvalidation-version>
</properties>
<dependencies>
<dependency>
<groupId>junit</groupId>
<artifactId>junit</artifactId>
<version>4.11</version>
<scope>test</scope>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxrs</artifactId>
<version>${resteasy-version}</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxb-provider</artifactId>
<version>${resteasy-version}</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-servlet-initializer</artifactId>
<version>${resteasy-servlet}</version>
</dependency>
</dependencies>
<build>
<finalName>NetworkManagement</finalName>
<pluginManagement>
<!-- lock down plugins versions to avoid using Maven defaults (may be moved to parent pom) -->
<plugins>
<plugin>
<artifactId>maven-clean-plugin</artifactId>
<version>3.1.0</version>
</plugin>
<!-- see http://maven.apache.org/ref/current/maven-core/default-bindings.html#Plugin_bindings_for_war_packaging -->
<plugin>
<artifactId>maven-resources-plugin</artifactId>
<version>3.0.2</version>
</plugin>
<plugin>
<artifactId>maven-compiler-plugin</artifactId>
<version>3.8.0</version>
</plugin>
<plugin>
<artifactId>maven-surefire-plugin</artifactId>
<version>2.22.1</version>
</plugin>
<plugin>
<artifactId>maven-war-plugin</artifactId>
<version>3.2.2</version>
</plugin>
<plugin>
<artifactId>maven-install-plugin</artifactId>
<version>2.5.2</version>
</plugin>
<plugin>
<artifactId>maven-deploy-plugin</artifactId>
<version>2.8.2</version>
</plugin>
</plugins>
</pluginManagement>
</build>
</project>
web.xml
<?xml version="1.0" encoding="UTF-8"?><web-app xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
xmlns="https://jakarta.ee/xml/ns/jakartaee"
xmlns:web="http://xmlns.jcp.org/xml/ns/javaee"
xsi:schemaLocation="https://jakarta.ee/xml/ns/jakartaee https://jakarta.ee/xml/ns/jakartaee/web-app_5_0.xsd http://xmlns.jcp.org/xml/ns/javaee http://java.sun.com/xml/ns/javaee/web-app_2_5.xsd"
id="WebApp_ID" version="5.0">
<display-name>Archetype Created Web Application</display-name>
</web-app>
App:
package com.gncc.srv.api.rest;
import java.util.HashSet;
import java.util.Set;
import javax.ws.rs.ApplicationPath;
import javax.ws.rs.core.Application;
import com.gncc.srv.api.rest.service.ConfigurationResource;
#ApplicationPath("/network-management")
public class NetworkManagement extends Application {
private Set<Object> singletons = new HashSet<Object>();
private Set<Class<?>> empty = new HashSet<Class<?>>();
public NetworkManagement() {
singletons.add(new ConfigurationResource());
}
#Override
public Set<Class<?>> getClasses() {
return empty;
}
#Override
public Set<Object> getSingletons() {
return singletons;
}}
resource.class
package com.gncc.srv.api.rest.service;
import java.util.List;
import javax.ws.rs.Consumes;
import javax.ws.rs.DELETE;
import javax.ws.rs.GET;
import javax.ws.rs.POST;
import javax.ws.rs.PUT;
import javax.ws.rs.Path;
import javax.ws.rs.PathParam;
import javax.ws.rs.Produces;
import javax.ws.rs.core.Context;
import javax.ws.rs.core.Link;
import javax.ws.rs.core.Response;
import javax.ws.rs.core.UriBuilder;
import javax.ws.rs.core.UriInfo;
import com.gncc.srv.api.rest.dao.ConfigurationDB;
import com.gncc.srv.api.rest.domain.Configuration;
import com.gncc.srv.api.rest.domain.Configurations;
import com.gncc.srv.api.rest.domain.common.Message;
import com.gncc.srv.api.rest.domain.common.Status;
/**
* This REST resource has common path "/configurations" and
* represents configurations collection resources
* as well as individual collection resources.
*
* Default MIME type for this resource is "application/XML"
* */
#Path("/configurations")
#Produces("application/xml")
public class ConfigurationResource
{
/**
* Initialize the application with these two default configurations
* */
static {
ConfigurationDB.createConfiguration("Some Content", Status.ACTIVE);
ConfigurationDB.createConfiguration("Some More Content", Status.INACTIVE);
}
/**
* Use uriInfo to get current context path and to build HATEOAS links
* */
#Context
UriInfo uriInfo;
/**
* Get configurations collection resource mapped at path "HTTP GET /configurations"
* */
#GET
public Configurations getConfigurations() {
List<Configuration> list = ConfigurationDB.getAllConfigurations();
Configurations configurations = new Configurations();
configurations.setConfigurations(list);
configurations.setSize(list.size());
//Set link for primary collection
Link link = Link.fromUri(uriInfo.getPath()).rel("uri").build();
configurations.setLink(link);
//Set links in configuration items
for(Configuration c: list){
Link lnk = Link.fromUri(uriInfo.getPath() + "/" + c.getId()).rel("self").build();
c.setLink(lnk);
}
return configurations;
}
/**
* Get individual configuration resource mapped at path "HTTP GET /configurations/{id}"
* */
#GET
#Path("/{id}")
public Response getConfigurationById(#PathParam("id") Integer id){
Configuration config = ConfigurationDB.getConfiguration(id);
if(config == null) {
return Response.status(javax.ws.rs.core.Response.Status.NOT_FOUND)
.build();
}
if(config != null){
UriBuilder builder = UriBuilder.fromResource(ConfigurationResource.class)
.path(ConfigurationResource.class, "getConfigurationById");
Link link = Link.fromUri(builder.build(id))
.rel("self")
.build();
config.setLink(link);
}
return Response.status(javax.ws.rs.core.Response.Status.OK)
.entity(config)
.build();
}
/**
* Create NEW configuration resource in configurations collection resource
* */
#POST
#Path("/")
#Consumes("application/xml")
public Response createConfiguration(Configuration config){
if(config.getContent() == null) {
return Response.status(javax.ws.rs.core.Response.Status.BAD_REQUEST)
.entity(new Message("Config content not found"))
.build();
}
Integer id = ConfigurationDB.createConfiguration(config.getContent(), config.getStatus());
Link lnk = Link.fromUri(uriInfo.getPath() + "/" + id).rel("self")
.build();
return Response.status(javax.ws.rs.core.Response.Status.CREATED)
.location(lnk.getUri())
.build();
}
/**
* Modify EXISTING configuration resource by it’s "id" at path "/configurations/{id}"
* */
#PUT
#Path("/{id}")
#Consumes("application/xml")
public Response updateConfiguration(#PathParam("id") Integer id, Configuration config){
Configuration origConfig = ConfigurationDB.getConfiguration(id);
if(origConfig == null) {
return Response.status(javax.ws.rs.core.Response.Status.NOT_FOUND)
.build();
}
if(config.getContent() == null) {
return Response.status(javax.ws.rs.core.Response.Status.BAD_REQUEST)
.entity(new Message("Config content not found"))
.build();
}
ConfigurationDB.updateConfiguration(id, config);
return Response.status(javax.ws.rs.core.Response.Status.OK)
.entity(new Message("Config Updated Successfully"))
.build();
}
/**
* Delete configuration resource by it’s "id" at path "/configurations/{id}"
* */
#DELETE
#Path("/{id}")
public Response deleteConfiguration(#PathParam("id") Integer id){
Configuration origConfig = ConfigurationDB.getConfiguration(id);
if(origConfig == null) {
return Response.status(javax.ws.rs.core.Response.Status.NOT_FOUND).build();
}
ConfigurationDB.removeConfiguration(id);
return Response.status(javax.ws.rs.core.Response.Status.OK).build();
}
}

Answer 1

You're RESTEasy dependencies do not look correct. You're mixing two different versions of RESTEasy which will not work. You need to use 6.2.2.Final if you're using Jakarta EE 9+, which Tomcat 10 uses. Your dependencies should look more like:
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-client</artifactId>
<version>${resteasy-version}</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-core</artifactId>
<version>${resteasy-version}</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-jaxb-provider</artifactId>
<version>${resteasy-version}</version>
</dependency>
<dependency>
<groupId>org.jboss.resteasy</groupId>
<artifactId>resteasy-servlet-initializer</artifactId>
<version>${resteasy-version}</version>
</dependency>