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.observation.starter;
  
  import io.micrometer.core.instrument.observation.MeterObservationHandler;
  import io.micrometer.observation.Observation;
  import io.micrometer.observation.ObservationRegistry;
  import io.micrometer.tracing.Tracer;
  import io.micrometer.tracing.handler.TracingAwareMeterObservationHandler;
  
  import org.apache.camel.CamelContext;
  import org.apache.camel.observation.MicrometerObservationTracer;
  
  import org.springframework.beans.factory.ObjectProvider;
  import org.springframework.boot.actuate.autoconfigure.tracing.MicrometerTracingAutoConfiguration;
  import org.springframework.boot.autoconfigure.AutoConfigureAfter;
  import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
  import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
  import org.springframework.boot.context.properties.EnableConfigurationProperties;
  import org.springframework.context.annotation.Bean;
  import org.springframework.context.annotation.Configuration;
  
  @Configuration(proxyBeanMethods = false)
  @AutoConfigureAfter(value = {
          org.springframework.boot.actuate.autoconfigure.observation.ObservationAutoConfiguration.class,
          MicrometerTracingAutoConfiguration.class })
  @EnableConfigurationProperties(ObservationConfigurationProperties.class)
  @ConditionalOnProperty(value = "camel.observation.enabled", matchIfMissing = true)
  public class ObservationAutoConfiguration {
  
      @Bean(initMethod = "", destroyMethod = "")
      // Camel handles the lifecycle of this bean
      @ConditionalOnMissingBean(MicrometerObservationTracer.class)
      MicrometerObservationTracer micrometerObservationTracer(CamelContext camelContext,
              ObservationConfigurationProperties config, ObjectProvider<Tracer> tracer,
              ObjectProvider<ObservationRegistry> observationRegistry) {
          MicrometerObservationTracer micrometerObservationTracer = new MicrometerObservationTracer();
          tracer.ifAvailable(micrometerObservationTracer::setTracer);
          observationRegistry.ifAvailable(micrometerObservationTracer::setObservationRegistry);
  
          if (config.getExcludePatterns() != null) {
              micrometerObservationTracer.setExcludePatterns(config.getExcludePatterns());
          }
          if (config.getEncoding() != null) {
              micrometerObservationTracer.setEncoding(config.getEncoding().booleanValue());
          }
          micrometerObservationTracer.init(camelContext);
  
          return micrometerObservationTracer;
      }
  
      @Bean
      // No-op version to suppress metric creation which may explode the length
      // of actuator as seen in CAMEL-22349
      public TracingAwareMeterObservationHandler<Observation.Context> tracingAwareMeterObservationHandler(Tracer tracer) {
          return new TracingAwareMeterObservationHandler<>(
              new MeterObservationHandler<Observation.Context>() {},
              tracer
          ) {
              @Override
              public void onEvent(Observation.Event event, Observation.Context context) {}
          };
      }
  
  }
  