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.mail;
  
  import java.io.IOException;
  import java.util.Map;
  
  import jakarta.mail.MessagingException;
  import jakarta.mail.internet.MimeMessage;
  
  import org.apache.camel.AsyncCallback;
  import org.apache.camel.Exchange;
  import org.apache.camel.support.DefaultAsyncProducer;
  import org.apache.camel.util.URISupport;
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  /**
   * A Producer to send messages using JavaMail.
   */
  public class MailProducer extends DefaultAsyncProducer {
  
      private static final Logger LOG = LoggerFactory.getLogger(MailProducer.class);
  
      private final JavaMailSender defaultSender;
  
      public MailProducer(MailEndpoint endpoint, JavaMailSender sender) {
          super(endpoint);
          this.defaultSender = sender;
      }
  
      @Override
      public boolean process(Exchange exchange, AsyncCallback callback) {
          JavaMailSender mailSender = getSender(exchange);
  
          ClassLoader tccl = Thread.currentThread().getContextClassLoader();
          try {
              ClassLoader applicationClassLoader = getEndpoint().getCamelContext().getApplicationContextClassLoader();
              if (applicationClassLoader != null) {
                  Thread.currentThread().setContextClassLoader(applicationClassLoader);
              }
  
              MimeMessage mimeMessage;
  
              final Object body = exchange.getIn().getBody();
              if (body instanceof MimeMessage) {
                  // Body is directly a MimeMessage
                  mimeMessage = (MimeMessage) body;
              } else {
                  // Create a message with exchange data
                  mimeMessage = new MimeMessage(mailSender.getSession());
                  getEndpoint().getBinding().populateMailMessage(getEndpoint(), mimeMessage, exchange);
              }
              if (LOG.isDebugEnabled()) {
                  LOG.debug("Sending MimeMessage: {}", MailUtils.dumpMessage(mimeMessage));
              }
              mailSender.send(mimeMessage);
              // set the message ID for further processing
              exchange.getIn().setHeader(MailConstants.MAIL_MESSAGE_ID, mimeMessage.getMessageID());
          } catch (MessagingException | IOException e) {
              exchange.setException(e);
          } finally {
              Thread.currentThread().setContextClassLoader(tccl);
          }
  
          callback.done(true);
          return true;
      }
  
      @Override
      public MailEndpoint getEndpoint() {
          return (MailEndpoint) super.getEndpoint();
      }
  
      protected JavaMailSender getSender(Exchange exchange) {
          // do we have special headers
          Map<String, Object> additional = URISupport.extractProperties(exchange.getMessage().getHeaders(), "mail.smtp.");
          if (additional.isEmpty()) {
              // no then use default sender
              LOG.trace("Using default JavaMailSender");
              return defaultSender;
          } else {
              // create new mail sender specially for this
              LOG.debug("Creating new JavaMailSender to include additional {} java mail properties", additional.size());
              JavaMailSender customSender
                      = getEndpoint().getConfiguration().createJavaMailSender(getEndpoint().getCamelContext());
              additional.forEach((k, v) -> {
                  if (v != null) {
                      // add with prefix so we dont loose that
                      customSender.addAdditionalJavaMailProperty("mail.smtp." + k, v.toString());
                  }
              });
              return customSender;
          }
      }
  }
  