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 @Override 033 public void drop() { 034 throw new RuntimeException("not implemented"); 035 } 036 037 @Override 038 public synchronized boolean dropIfLive() { 039 throw new RuntimeException("not implemented"); 040 } 041 042 @Override 043 public LockOwner getLockOwner() { 044 throw new RuntimeException("not implemented"); 045 } 046 047 @Override 048 public boolean isAcked() { 049 return false; 050 } 051 052 @Override 053 public boolean isDropped() { 054 return false; 055 } 056 057 @Override 058 public boolean lock(LockOwner subscription) { 059 return true; 060 } 061 062 @Override 063 public void setAcked(boolean b) { 064 throw new RuntimeException("not implemented"); 065 } 066 067 @Override 068 public boolean unlock() { 069 return true; 070 } 071 072 @Override 073 public int decrementReferenceCount() { 074 return --references; 075 } 076 077 @Override 078 public long getExpiration() { 079 throw new RuntimeException("not implemented"); 080 } 081 082 @Override 083 public String getGroupID() { 084 return null; 085 } 086 087 @Override 088 public int getGroupSequence() { 089 return 0; 090 } 091 092 @Override 093 public Message getMessage() { 094 return message; 095 } 096 097 @Override 098 public Message getMessageHardRef() { 099 throw new RuntimeException("not implemented"); 100 } 101 102 @Override 103 public MessageId getMessageId() { 104 return message.getMessageId(); 105 } 106 107 @Override 108 public int getRedeliveryCounter() { 109 throw new RuntimeException("not implemented"); 110 } 111 112 @Override 113 public int getReferenceCount() { 114 return references; 115 } 116 117 @Override 118 public Destination getRegionDestination() { 119 return null; 120 } 121 122 @Override 123 public int getSize() { 124 throw new RuntimeException("not implemented"); 125 } 126 127 @Override 128 public ConsumerId getTargetConsumerId() { 129 throw new RuntimeException("not implemented"); 130 } 131 132 @Override 133 public void incrementRedeliveryCounter() { 134 throw new RuntimeException("not implemented"); 135 } 136 137 @Override 138 public int incrementReferenceCount() { 139 return ++references; 140 } 141 142 @Override 143 public boolean isExpired() { 144 return false; 145 } 146 147 @Override 148 public boolean isPersistent() { 149 throw new RuntimeException("not implemented"); 150 } 151 152 @Override 153 public boolean isAdvisory() { 154 return false; 155 } 156 157 @Override 158 public boolean canProcessAsExpired() { 159 return false; 160 } 161 162}