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    
018    package org.apache.activemq.state;
019    
020    import java.util.Collection;
021    import java.util.Map;
022    import java.util.Set;
023    import java.util.concurrent.ConcurrentHashMap;
024    import java.util.concurrent.atomic.AtomicBoolean;
025    
026    import org.apache.activemq.command.ConsumerId;
027    import org.apache.activemq.command.ConsumerInfo;
028    import org.apache.activemq.command.ProducerId;
029    import org.apache.activemq.command.ProducerInfo;
030    import org.apache.activemq.command.SessionInfo;
031    
032    public class SessionState {
033        final SessionInfo info;
034    
035        private final Map<ProducerId, ProducerState> producers = new ConcurrentHashMap<ProducerId, ProducerState>();
036        private final Map<ConsumerId, ConsumerState> consumers = new ConcurrentHashMap<ConsumerId, ConsumerState>();
037        private final AtomicBoolean shutdown = new AtomicBoolean(false);
038    
039        public SessionState(SessionInfo info) {
040            this.info = info;
041        }
042    
043        public String toString() {
044            return info.toString();
045        }
046    
047        public void addProducer(ProducerInfo info) {
048            checkShutdown();
049            producers.put(info.getProducerId(), new ProducerState(info));
050        }
051    
052        public ProducerState removeProducer(ProducerId id) {
053            ProducerState producerState = producers.remove(id);
054            if (producerState != null) {
055                if (producerState.getTransactionState() != null) {
056                    // allow the transaction to recreate dependent producer on recovery
057                    producerState.getTransactionState().addProducerState(producerState);
058                }
059            }
060            return producerState;
061        }
062        
063        public void addConsumer(ConsumerInfo info) {
064            checkShutdown();
065            consumers.put(info.getConsumerId(), new ConsumerState(info));
066        }
067    
068        public ConsumerState removeConsumer(ConsumerId id) {
069            return consumers.remove(id);
070        }
071    
072        public SessionInfo getInfo() {
073            return info;
074        }
075    
076        public Set<ConsumerId> getConsumerIds() {
077            return consumers.keySet();
078        }
079    
080        public Set<ProducerId> getProducerIds() {
081            return producers.keySet();
082        }
083    
084        public Collection<ProducerState> getProducerStates() {
085            return producers.values();
086        }
087    
088        public ProducerState getProducerState(ProducerId producerId) {
089            return producers.get(producerId);
090        }
091    
092        public Collection<ConsumerState> getConsumerStates() {
093            return consumers.values();
094        }
095    
096        public ConsumerState getConsumerState(ConsumerId consumerId) {
097            return consumers.get(consumerId);
098        }
099    
100        private void checkShutdown() {
101            if (shutdown.get()) {
102                throw new IllegalStateException("Disposed");
103            }
104        }
105    
106        public void shutdown() {
107            shutdown.set(false);
108        }
109    
110    }