content: /*
   * Licensed to the Apache Software Foundation (ASF) under one or more
   * contributor license agreements.  See the NOTICE file distributed with
   * this work for additional information regarding copyright ownership.
   * The ASF licenses this file to You under the Apache License, Version 2.0
   * (the "License"); you may not use this file except in compliance with
   * the License.  You may obtain a copy of the License at
   *
   *      http://www.apache.org/licenses/LICENSE-2.0
   *
   * Unless required by applicable law or agreed to in writing, software
   * distributed under the License is distributed on an "AS IS" BASIS,
   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
   * See the License for the specific language governing permissions and
   * limitations under the License.
   */
  package org.apache.camel.quarkus.component.observabilityservices.it.health;
  
  import java.lang.management.ManagementFactory;
  import java.util.Iterator;
  import java.util.Set;
  
  import javax.management.MBeanServer;
  import javax.management.MalformedObjectNameException;
  import javax.management.ObjectInstance;
  import javax.management.ObjectName;
  
  import io.micrometer.prometheus.PrometheusMeterRegistry;
  import jakarta.inject.Inject;
  import jakarta.ws.rs.GET;
  import jakarta.ws.rs.POST;
  import jakarta.ws.rs.Path;
  import jakarta.ws.rs.Produces;
  import jakarta.ws.rs.QueryParam;
  import jakarta.ws.rs.core.MediaType;
  import jakarta.ws.rs.core.Response;
  import org.apache.camel.FluentProducerTemplate;
  
  @Path("/observability-services")
  public class ObservabilityServicesResource {
      @Inject
      FluentProducerTemplate fluentProducerTemplate;
  
      @Inject
      PrometheusMeterRegistry prometheusMeterRegistry;
  
      @GET
      @Path("/registry")
      @Produces(MediaType.TEXT_PLAIN)
      public Response prometheusMeterRegistry() {
          if (prometheusMeterRegistry != null) {
              return Response.ok().entity(prometheusMeterRegistry.getClass().getName()).build();
          }
          return Response.status(Response.Status.NOT_FOUND).build();
      }
  
      @POST
      @Path("/trace")
      @Produces(MediaType.TEXT_PLAIN)
      public String trace(String message) {
          return fluentProducerTemplate.to("direct:start")
                  .withBody(message)
                  .request(String.class);
      }
  
      @GET
      @Path("/jmx/attribute")
      @Produces(MediaType.TEXT_PLAIN)
      public String getMBeanAttribute(@QueryParam("name") String name, @QueryParam("attribute") String attribute)
              throws Exception {
          ObjectInstance mbean = getMBean(name);
          if (mbean != null) {
              return String.valueOf(getMBeanServer().getAttribute(mbean.getObjectName(), attribute));
          }
          return null;
      }
  
      private ObjectInstance getMBean(String name) throws MalformedObjectNameException {
          ObjectName objectName = new ObjectName(name);
          Set<ObjectInstance> mbeans = getMBeanServer().queryMBeans(objectName, null);
          Iterator<ObjectInstance> iterator = mbeans.iterator();
          if (iterator.hasNext()) {
              return iterator.next();
          }
          return null;
      }
  
      private MBeanServer getMBeanServer() {
          return ManagementFactory.getPlatformMBeanServer();
      }
  }
  