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.policy;
  
  import org.apache.activemq.broker.region.TopicSubscription;
  
  /**
   * This PendingMessageLimitStrategy sets the maximum pending message limit value to be
   * a multiplier of the prefetch limit of the subscription.
   * 
   * @org.apache.xbean.XBean
   * 
   * 
   */
  public class PrefetchRatePendingMessageLimitStrategy implements PendingMessageLimitStrategy {
  
      private double multiplier = 0.5;
  
      public int getMaximumPendingMessageLimit(TopicSubscription subscription) {
          int prefetchSize = subscription.getConsumerInfo().getPrefetchSize();
          return (int) (prefetchSize * multiplier);
      }
  
      public double getMultiplier() {
          return multiplier;
      }
  
      /**
       * Sets the multiplier of the prefetch size which will be used to define the maximum number of pending
       * messages for non-durable topics before messages are discarded.
       */
      public void setMultiplier(double rate) {
          this.multiplier = rate;
      }
  
  }
  