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.activemq.broker;
  
  import java.util.Set;
  import org.apache.activemq.command.Message;
  import org.apache.activemq.jaas.UserPrincipal;
  import org.apache.activemq.security.SecurityContext;
  
  /**
   * This broker filter will append the producer's user ID into the JMSXUserID header
   * to allow folks to know reliably who the user was who produced a message.
   * Note that you cannot trust the client, especially if working over the internet
   * as they can spoof headers to be anything they like.
   * 
   * 
   */
  public class UserIDBroker extends BrokerFilter {
      boolean useAuthenticatePrincipal = false;
      public UserIDBroker(Broker next) {
          super(next);
      }
  
      public void send(ProducerBrokerExchange producerExchange, Message messageSend) throws Exception {
          final ConnectionContext context = producerExchange.getConnectionContext();
          if(context.isNetworkConnection() && messageSend.getUserID() != null) {
              super.send(producerExchange, messageSend);
              return;
          }
          String userID = context.getUserName();
          if (isUseAuthenticatePrincipal()) {
              SecurityContext securityContext = context.getSecurityContext();
              if (securityContext != null) {
                  Set<?> principals = securityContext.getPrincipals();
                  if (principals != null) {
                      for (Object candidate : principals) {
                          if (candidate instanceof UserPrincipal) {
                              userID = ((UserPrincipal)candidate).getName();
                              break;
                          }
                      }
                  }
              }
          }
          messageSend.setUserID(userID);
          super.send(producerExchange, messageSend);
      }
  
  
      public boolean isUseAuthenticatePrincipal() {
          return useAuthenticatePrincipal;
      }
  
      public void setUseAuthenticatePrincipal(boolean useAuthenticatePrincipal) {
          this.useAuthenticatePrincipal = useAuthenticatePrincipal;
      }
  }
  