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.spring.boot;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  import org.springframework.boot.SpringApplication;
  import org.springframework.boot.env.EnvironmentPostProcessor;
  import org.springframework.core.env.ConfigurableEnvironment;
  
  /**
   * Environment post processor that automatically sets the Camel virtual thread 
   * system property when Spring Boot virtual threads are enabled.
   * 
   * This processor runs very early in the Spring Boot startup process, before
   * any Camel classes are loaded, ensuring that Camel's ThreadType static 
   * initialization picks up the correct virtual thread configuration.
   */
  public class CamelVirtualThreadEnvironmentPostProcessor implements EnvironmentPostProcessor {
  
      private static final Logger LOG = LoggerFactory.getLogger(CamelVirtualThreadEnvironmentPostProcessor.class);
  
      @Override
      public void postProcessEnvironment(ConfigurableEnvironment environment, SpringApplication application) {
          // Check if Spring Boot virtual threads are enabled
          String springVirtualThreads = environment.getProperty("spring.threads.virtual.enabled");
          
          if ("true".equalsIgnoreCase(springVirtualThreads)) {
              // Set the Camel virtual threads system property early, before Camel classes are loaded
              String existingCamelProperty = System.getProperty("camel.threads.virtual.enabled");
              
              if (existingCamelProperty == null) {
                  System.setProperty("camel.threads.virtual.enabled", "true");
                  LOG.info("Spring virtual threads enabled - automatically setting camel.threads.virtual.enabled=true");
              } else {
                  LOG.debug("camel.threads.virtual.enabled already set to: {}", existingCamelProperty);
              }
          }
      }
  }