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.web;
  
  import java.util.HashMap;
  import java.util.Map;
  import java.util.Date;
  
  import jakarta.jms.MessageConsumer;
  import jakarta.servlet.http.HttpServletRequest;
  
  import org.slf4j.Logger;
  import org.slf4j.LoggerFactory;
  
  import org.apache.activemq.MessageAvailableConsumer;
  
  /*
   * Collection of all data needed to fulfill requests from a single web client.
   */
  public class AjaxWebClient extends WebClient {
      private static final Logger LOG = LoggerFactory.getLogger(AjaxWebClient.class);
      
      // an instance which has not been accessed in this many milliseconds can be removed.
      final long expireAfter = 60 * 1000;
      
      Map<MessageAvailableConsumer, String> idMap;
      Map<MessageAvailableConsumer, String> destinationNameMap;
      AjaxListener listener;
      Long lastAccessed;
      
      public AjaxWebClient( HttpServletRequest request, long maximumReadTimeout ) {
          // 'id' meaning the first argument to the JavaScript addListener() function.
          // used to indicate which JS callback should handle a given message.
          this.idMap = new HashMap<MessageAvailableConsumer, String>();
          
          // map consumers to destinations like topic://test, etc.
          this.destinationNameMap = new HashMap<MessageAvailableConsumer, String>();
          
          this.listener = new AjaxListener( this, maximumReadTimeout );
          
          this.lastAccessed = this.getNow();
      }
      
      public Map<MessageAvailableConsumer, String> getIdMap() {
          return this.idMap;
      }
      
      public Map<MessageAvailableConsumer, String> getDestinationNameMap() {
          return this.destinationNameMap;
      }
      
      public AjaxListener getListener() {
          return this.listener;
      }
      
      public long getMillisSinceLastAccessed() {
          return this.getNow() - this.lastAccessed;
      }
      
      public void updateLastAccessed() {
          this.lastAccessed = this.getNow();
      }
      
      public boolean closeIfExpired() {
          long now = (new Date()).getTime();
          boolean returnVal = false;
          if( this.getMillisSinceLastAccessed() > this.expireAfter ) {
              this.close();
              returnVal = true;
          }
          return returnVal;
      }
      
      protected long getNow() {
          return (new Date()).getTime();
      }
  }
  