001/**
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to You under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 *      http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package org.apache.activemq.broker.jmx;
018
019import org.apache.activemq.broker.region.DurableTopicSubscription;
020import org.apache.activemq.broker.region.TopicSubscription;
021
022/**
023 * 
024 * 
025 */
026public class TopicSubscriptionView extends SubscriptionView implements TopicSubscriptionViewMBean {
027
028    public TopicSubscriptionView(String clientId, TopicSubscription subs) {
029        super(clientId, subs);
030    }
031
032    protected TopicSubscription getTopicSubscription() {
033        return (TopicSubscription)subscription;
034    }
035
036    /**
037     * @return the number of messages discarded due to being a slow consumer
038     */
039    public int getDiscardedCount() {
040        TopicSubscription topicSubscription = getTopicSubscription();
041        return topicSubscription != null ? topicSubscription.discarded() : 0;
042    }
043
044    /**
045     * @return the maximun number of messages that can be pending.
046     */
047    public int getMaximumPendingQueueSize() {
048        TopicSubscription topicSubscription = getTopicSubscription();
049        return topicSubscription != null ? topicSubscription.getMaximumPendingMessages() : 0;
050    }
051
052    /**
053     * 
054     */
055    public void setMaximumPendingQueueSize(int max) {
056        TopicSubscription topicSubscription = getTopicSubscription();
057        if (topicSubscription != null) {
058            topicSubscription.setMaximumPendingMessages(max);
059        }
060    }
061
062    @Override
063    public boolean isActive() {
064        if (subscription instanceof DurableTopicSubscription) {
065            return ((DurableTopicSubscription)subscription).isActive();
066        } else {
067            return super.isActive();
068        }
069    }
070
071    
072
073}