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.component.micrometer.springboot;
  
  import io.micrometer.common.KeyValue;
  import io.micrometer.common.KeyValues;
  import jakarta.servlet.http.HttpServletRequest;
  import org.apache.camel.component.micrometer.springboot.metrics.CamelMetricsConfiguration;
  import org.apache.camel.http.common.CamelServlet;
  import org.apache.camel.http.common.HttpConsumer;
  import org.apache.camel.spring.boot.CamelAutoConfiguration;
  import org.apache.camel.spring.boot.util.ConditionalOnCamelContextAndAutoConfigurationBeans;
  import org.springframework.boot.autoconfigure.AutoConfigureAfter;
  import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
  import org.springframework.context.annotation.Bean;
  import org.springframework.context.annotation.Conditional;
  import org.springframework.context.annotation.Configuration;
  import org.springframework.http.server.observation.DefaultServerRequestObservationConvention;
  import org.springframework.http.server.observation.ServerRequestObservationContext;
  import org.springframework.http.server.observation.ServerRequestObservationConvention;
  
  import java.util.Optional;
  
  @Configuration(proxyBeanMethods = false)
  @Conditional({ ConditionalOnCamelContextAndAutoConfigurationBeans.class })
  @ConditionalOnProperty(prefix = "camel.metrics", name = "uriTagEnabled", havingValue = "true")
  @AutoConfigureAfter({ CamelAutoConfiguration.class })
  public class MicrometerTagsAutoConfiguration {
  
      /**
       * To integrate with micrometer to include expanded uri in tags when for example using camel rest-dsl with servlet.
       */
      @Bean
      ServerRequestObservationConvention serverRequestObservationConvention(Optional<CamelServlet> servlet,
              CamelMetricsConfiguration configuration) {
          return new DefaultServerRequestObservationConvention() {
  
              @Override
              public KeyValues getLowCardinalityKeyValues(ServerRequestObservationContext context) {
                  // here, we just want to have an additional KeyValue to the observation, keeping the default values
                  return super.getLowCardinalityKeyValues(context).and(custom(context));
              }
  
              protected KeyValue custom(ServerRequestObservationContext context) {
                  HttpServletRequest request = context.getCarrier();
                  String uri = null;
                  if (servlet.isPresent() && !configuration.isUriTagDynamic()) {
                      HttpConsumer consumer = servlet.get().getServletResolveConsumerStrategy().resolve(request,
                              servlet.get().getConsumers());
                      if (consumer != null) {
                          uri = consumer.getPath();
                      }
                  }
  
                  // the request may not be for camel servlet, so we need to capture uri from request
                  if (uri == null || uri.isEmpty()) {
                      // dynamic uri with the actual value from the http request
                      uri = request.getServletPath();
                      if (uri == null || uri.isEmpty()) {
                          uri = request.getPathInfo();
                      } else {
                          String p = request.getPathInfo();
                          if (p != null) {
                              uri = uri + p;
                          }
                      }
                  }
                  if (uri == null) {
                      uri = "";
                  }
  
                  return KeyValue.of("uri", uri);
              }
          };
      }
  }
  