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.region;
  
  import java.util.Iterator;
  import java.util.Set;
  
  import jakarta.jms.JMSException;
  
  import org.apache.activemq.broker.ConnectionContext;
  import org.apache.activemq.broker.region.policy.PolicyEntry;
  import org.apache.activemq.command.ActiveMQDestination;
  import org.apache.activemq.command.ConsumerInfo;
  import org.apache.activemq.command.Message;
  import org.apache.activemq.command.MessageDispatchNotification;
  import org.apache.activemq.thread.TaskRunnerFactory;
  import org.apache.activemq.usage.SystemUsage;
  
  /**
   * 
   * 
   */
  public class QueueRegion extends AbstractRegion {
  
      public QueueRegion(RegionBroker broker, DestinationStatistics destinationStatistics,
                         SystemUsage memoryManager, TaskRunnerFactory taskRunnerFactory,
                         DestinationFactory destinationFactory) {
          super(broker, destinationStatistics, memoryManager, taskRunnerFactory, destinationFactory);
      }
  
      public String toString() {
          return "QueueRegion: destinations=" + destinations.size() + ", subscriptions=" + subscriptions.size()
                 + ", memory=" + usageManager.getMemoryUsage().getPercentUsage() + "%";
      }
  
      protected Subscription createSubscription(ConnectionContext context, ConsumerInfo info)
          throws JMSException {
          ActiveMQDestination destination = info.getDestination();
          PolicyEntry entry = null;
          if (destination != null && broker.getDestinationPolicy() != null) {
              entry = broker.getDestinationPolicy().getEntryFor(destination);
              
          }
          if (info.isBrowser()) {
              QueueBrowserSubscription sub = new QueueBrowserSubscription(broker,usageManager, context, info);
              if (entry != null) {
                  entry.configure(broker, usageManager, sub);
              }
              return sub;
          } else {
              QueueSubscription sub =   new QueueSubscription(broker, usageManager,context, info);
              if (entry != null) {
                  entry.configure(broker, usageManager, sub);
              }
              return sub;
          }
      }
  
      protected Set<ActiveMQDestination> getInactiveDestinations() {
          Set<ActiveMQDestination> inactiveDestinations = super.getInactiveDestinations();
          for (Iterator<ActiveMQDestination> iter = inactiveDestinations.iterator(); iter.hasNext();) {
              ActiveMQDestination dest = iter.next();
              if (!dest.isQueue()) {
                  iter.remove();
              }
          }
          return inactiveDestinations;
      }
      
      /*
       * For a Queue, dispatch order is imperative to match acks, so the dispatch is deferred till 
       * the notification to ensure that the subscription chosen by the master is used.
       * 
       * (non-Javadoc)
       * @see org.apache.activemq.broker.region.AbstractRegion#processDispatchNotification(org.apache.activemq.command.MessageDispatchNotification)
       */
      public void processDispatchNotification(MessageDispatchNotification messageDispatchNotification) throws Exception {
          processDispatchNotificationViaDestination(messageDispatchNotification);
      }
  }
  