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     */
017    package org.apache.activemq.broker.jmx;
018    
019    import javax.management.openmbean.CompositeData;
020    import javax.management.openmbean.OpenDataException;
021    import javax.management.openmbean.TabularData;
022    
023    import org.apache.activemq.broker.ConnectionContext;
024    import org.apache.activemq.broker.region.DurableTopicSubscription;
025    import org.apache.activemq.broker.region.Subscription;
026    import org.apache.activemq.command.RemoveSubscriptionInfo;
027    
028    /**
029     *
030     */
031    public class DurableSubscriptionView extends SubscriptionView implements DurableSubscriptionViewMBean {
032    
033        protected ManagedRegionBroker broker;
034        protected String subscriptionName;
035        protected DurableTopicSubscription durableSub;
036    
037        /**
038         * Constructor
039         *
040         * @param clientId
041         * @param sub
042         */
043        public DurableSubscriptionView(ManagedRegionBroker broker, String clientId, String userName, Subscription sub) {
044            super(clientId, userName, sub);
045            this.broker = broker;
046            this.durableSub=(DurableTopicSubscription) sub;
047            if (sub != null) {
048                this.subscriptionName = sub.getConsumerInfo().getSubscriptionName();
049            }
050        }
051    
052        /**
053         * @return name of the durable consumer
054         */
055        public String getSubscriptionName() {
056            return subscriptionName;
057        }
058    
059        /**
060         * Browse messages for this durable subscriber
061         *
062         * @return messages
063         * @throws OpenDataException
064         */
065        public CompositeData[] browse() throws OpenDataException {
066            return broker.browse(this);
067        }
068    
069        /**
070         * Browse messages for this durable subscriber
071         *
072         * @return messages
073         * @throws OpenDataException
074         */
075        public TabularData browseAsTable() throws OpenDataException {
076            return broker.browseAsTable(this);
077        }
078    
079        /**
080         * Destroys the durable subscription so that messages will no longer be
081         * stored for this subscription
082         */
083        public void destroy() throws Exception {
084            RemoveSubscriptionInfo info = new RemoveSubscriptionInfo();
085            info.setClientId(clientId);
086            info.setSubscriptionName(subscriptionName);
087            ConnectionContext context = new ConnectionContext();
088            context.setBroker(broker);
089            context.setClientId(clientId);
090            broker.removeSubscription(context, info);
091        }
092    
093        public String toString() {
094            return "ActiveDurableSubscriptionView: " + getClientId() + ":" + getSubscriptionName();
095        }
096    
097    
098        public int cursorSize() {
099            if (durableSub != null && durableSub.getPending() != null) {
100                return durableSub.getPending().size();
101            }
102            return 0;
103        }
104    
105    
106        public boolean doesCursorHaveMessagesBuffered() {
107            if (durableSub != null && durableSub.getPending() != null) {
108                return durableSub.getPending().hasMessagesBufferedToDeliver();
109            }
110            return false;
111        }
112    
113    
114        public boolean doesCursorHaveSpace() {
115            if (durableSub != null && durableSub.getPending() != null) {
116                return durableSub.getPending().hasSpace();
117            }
118            return false;
119        }
120    
121        /* (non-Javadoc)
122         * @see org.apache.activemq.broker.jmx.DurableSubscriptionViewMBean#getCursorMemoryUsage()
123         */
124        public long getCursorMemoryUsage() {
125            if (durableSub != null && durableSub.getPending() != null && durableSub.getPending().getSystemUsage()!=null) {
126                return durableSub.getPending().getSystemUsage().getMemoryUsage().getUsage();
127            }
128            return 0;
129        }
130    
131    
132        public int getCursorPercentUsage() {
133            if (durableSub != null && durableSub.getPending() != null && durableSub.getPending().getSystemUsage()!=null) {
134                return durableSub.getPending().getSystemUsage().getMemoryUsage().getPercentUsage();
135            }
136            return 0;
137        }
138    
139        public boolean isCursorFull() {
140            if (durableSub != null && durableSub.getPending() != null) {
141                return durableSub.getPending().isFull();
142            }
143            return false;
144        }
145    
146        @Override
147        public boolean isActive() {
148            return durableSub.isActive();
149        }
150    
151    
152    }