/**
* 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;
}
}