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
018package org.apache.activemq.state;
019
020import java.util.Collection;
021import java.util.Map;
022import java.util.Set;
023import java.util.concurrent.ConcurrentHashMap;
024import java.util.concurrent.atomic.AtomicBoolean;
025
026import org.apache.activemq.command.ConsumerId;
027import org.apache.activemq.command.ConsumerInfo;
028import org.apache.activemq.command.ProducerId;
029import org.apache.activemq.command.ProducerInfo;
030import org.apache.activemq.command.SessionInfo;
031
032public 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}