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.region;
018
019import org.apache.activemq.command.ActiveMQMessage;
020import org.apache.activemq.command.ConsumerId;
021import org.apache.activemq.command.Message;
022import org.apache.activemq.command.MessageId;
023
024/**
025 * Used by the {@link QueueMessageReference#NULL_MESSAGE}
026 */
027public final class NullMessageReference implements QueueMessageReference {
028
029    private final ActiveMQMessage message = new ActiveMQMessage();
030    private volatile int references;
031
032    public void drop() {
033        throw new RuntimeException("not implemented");
034    }
035
036    public LockOwner getLockOwner() {
037        throw new RuntimeException("not implemented");
038    }
039
040    public boolean isAcked() {
041        return false;
042    }
043
044    public boolean isDropped() {
045        return false;
046    }
047
048    public boolean lock(LockOwner subscription) {
049        return true;
050    }
051
052    public void setAcked(boolean b) {
053        throw new RuntimeException("not implemented");
054    }
055
056    public boolean unlock() {
057        return true;
058    }
059
060    public int decrementReferenceCount() {
061        return --references;
062    }
063
064    public long getExpiration() {
065        throw new RuntimeException("not implemented");
066    }
067
068    public String getGroupID() {
069        return null;
070    }
071
072    public int getGroupSequence() {
073        return 0;
074    }
075
076    public Message getMessage()  {
077        return message;
078    }
079
080    public Message getMessageHardRef() {
081        throw new RuntimeException("not implemented");
082    }
083
084    public MessageId getMessageId() {
085        return message.getMessageId();
086    }
087
088    public int getRedeliveryCounter() {
089        throw new RuntimeException("not implemented");
090    }
091
092    public int getReferenceCount() {
093        return references;
094    }
095
096    public Destination getRegionDestination() {
097        return null;
098    }
099
100    public int getSize() {
101        throw new RuntimeException("not implemented");
102    }
103
104    public ConsumerId getTargetConsumerId() {
105        throw new RuntimeException("not implemented");
106    }
107
108    public void incrementRedeliveryCounter() {
109        throw new RuntimeException("not implemented");
110    }
111
112    public int incrementReferenceCount() {
113        return ++references;
114    }
115
116    public boolean isExpired() {
117        return false;
118    }
119
120    public boolean isPersistent() {
121        throw new RuntimeException("not implemented");
122    }
123
124    public boolean isAdvisory() {
125        return false;
126    }
127
128    @Override
129    public boolean canProcessAsExpired() {
130        return false;
131    }
132
133}