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.store.amq; 019 020 import java.io.IOException; 021 import java.util.Iterator; 022 import java.util.LinkedHashMap; 023 import java.util.Map; 024 025 import javax.transaction.xa.XAException; 026 027 import org.apache.activemq.command.JournalTopicAck; 028 import org.apache.activemq.command.JournalTransaction; 029 import org.apache.activemq.command.Message; 030 import org.apache.activemq.command.MessageAck; 031 import org.apache.activemq.command.TransactionId; 032 import org.apache.activemq.command.XATransactionId; 033 import org.apache.activemq.kaha.impl.async.Location; 034 import org.apache.activemq.store.TransactionRecoveryListener; 035 import org.apache.activemq.store.TransactionStore; 036 037 /** 038 */ 039 public class AMQTransactionStore implements TransactionStore { 040 041 protected Map<TransactionId, AMQTx> inflightTransactions = new LinkedHashMap<TransactionId, AMQTx>(); 042 Map<TransactionId, AMQTx> preparedTransactions = new LinkedHashMap<TransactionId, AMQTx>(); 043 044 private final AMQPersistenceAdapter peristenceAdapter; 045 private boolean doingRecover; 046 047 public AMQTransactionStore(AMQPersistenceAdapter adapter) { 048 this.peristenceAdapter = adapter; 049 } 050 051 /** 052 * @throws IOException 053 * @see org.apache.activemq.store.TransactionStore#prepare(TransactionId) 054 */ 055 public void prepare(TransactionId txid) throws IOException { 056 AMQTx tx = null; 057 synchronized (inflightTransactions) { 058 tx = inflightTransactions.remove(txid); 059 } 060 if (tx == null) { 061 return; 062 } 063 peristenceAdapter.writeCommand(new JournalTransaction(JournalTransaction.XA_PREPARE, txid, false), true); 064 synchronized (preparedTransactions) { 065 preparedTransactions.put(txid, tx); 066 } 067 } 068 069 /** 070 * @throws IOException 071 * @see org.apache.activemq.store.TransactionStore#prepare(TransactionId) 072 */ 073 public void replayPrepare(TransactionId txid) throws IOException { 074 AMQTx tx = null; 075 synchronized (inflightTransactions) { 076 tx = inflightTransactions.remove(txid); 077 } 078 if (tx == null) { 079 return; 080 } 081 synchronized (preparedTransactions) { 082 preparedTransactions.put(txid, tx); 083 } 084 } 085 086 public AMQTx getTx(TransactionId txid, Location location) { 087 AMQTx tx = null; 088 synchronized (inflightTransactions) { 089 tx = inflightTransactions.get(txid); 090 if (tx == null) { 091 tx = new AMQTx(location); 092 inflightTransactions.put(txid, tx); 093 } 094 } 095 return tx; 096 } 097 098 /** 099 * @throws XAException 100 * @see org.apache.activemq.store.TransactionStore#commit(org.apache.activemq.service.Transaction) 101 */ 102 public void commit(TransactionId txid, boolean wasPrepared) throws IOException { 103 AMQTx tx; 104 if (wasPrepared) { 105 synchronized (preparedTransactions) { 106 tx = preparedTransactions.remove(txid); 107 } 108 } else { 109 synchronized (inflightTransactions) { 110 tx = inflightTransactions.remove(txid); 111 } 112 } 113 if (tx == null) { 114 return; 115 } 116 if (txid.isXATransaction()) { 117 peristenceAdapter.writeCommand(new JournalTransaction(JournalTransaction.XA_COMMIT, txid, wasPrepared), true,true); 118 } else { 119 peristenceAdapter.writeCommand(new JournalTransaction(JournalTransaction.LOCAL_COMMIT, txid, wasPrepared), true,true); 120 } 121 } 122 123 /** 124 * @throws XAException 125 * @see org.apache.activemq.store.TransactionStore#commit(org.apache.activemq.service.Transaction) 126 */ 127 public AMQTx replayCommit(TransactionId txid, boolean wasPrepared) throws IOException { 128 if (wasPrepared) { 129 synchronized (preparedTransactions) { 130 return preparedTransactions.remove(txid); 131 } 132 } else { 133 synchronized (inflightTransactions) { 134 return inflightTransactions.remove(txid); 135 } 136 } 137 } 138 139 /** 140 * @throws IOException 141 * @see org.apache.activemq.store.TransactionStore#rollback(TransactionId) 142 */ 143 public void rollback(TransactionId txid) throws IOException { 144 AMQTx tx = null; 145 synchronized (inflightTransactions) { 146 tx = inflightTransactions.remove(txid); 147 } 148 if (tx != null) { 149 synchronized (preparedTransactions) { 150 tx = preparedTransactions.remove(txid); 151 } 152 } 153 if (tx != null) { 154 if (txid.isXATransaction()) { 155 peristenceAdapter.writeCommand(new JournalTransaction(JournalTransaction.XA_ROLLBACK, txid, false), true,true); 156 } else { 157 peristenceAdapter.writeCommand(new JournalTransaction(JournalTransaction.LOCAL_ROLLBACK, txid, false), true,true); 158 } 159 } 160 } 161 162 /** 163 * @throws IOException 164 * @see org.apache.activemq.store.TransactionStore#rollback(TransactionId) 165 */ 166 public void replayRollback(TransactionId txid) throws IOException { 167 boolean inflight = false; 168 synchronized (inflightTransactions) { 169 inflight = inflightTransactions.remove(txid) != null; 170 } 171 if (inflight) { 172 synchronized (preparedTransactions) { 173 preparedTransactions.remove(txid); 174 } 175 } 176 } 177 178 public void start() throws Exception { 179 } 180 181 public void stop() throws Exception { 182 } 183 184 public synchronized void recover(TransactionRecoveryListener listener) throws IOException { 185 // All the in-flight transactions get rolled back.. 186 synchronized (inflightTransactions) { 187 inflightTransactions.clear(); 188 } 189 this.doingRecover = true; 190 try { 191 Map<TransactionId, AMQTx> txs = null; 192 synchronized (preparedTransactions) { 193 txs = new LinkedHashMap<TransactionId, AMQTx>(preparedTransactions); 194 } 195 for (Iterator<TransactionId> iter = txs.keySet().iterator(); iter.hasNext();) { 196 Object txid = iter.next(); 197 AMQTx tx = txs.get(txid); 198 listener.recover((XATransactionId)txid, tx.getMessages(), tx.getAcks()); 199 } 200 } finally { 201 this.doingRecover = false; 202 } 203 } 204 205 /** 206 * @param message 207 * @throws IOException 208 */ 209 void addMessage(AMQMessageStore store, Message message, Location location) throws IOException { 210 AMQTx tx = getTx(message.getTransactionId(), location); 211 tx.add(store, message, location); 212 } 213 214 /** 215 * @param ack 216 * @throws IOException 217 */ 218 public void removeMessage(AMQMessageStore store, MessageAck ack, Location location) throws IOException { 219 AMQTx tx = getTx(ack.getTransactionId(), location); 220 tx.add(store, ack); 221 } 222 223 public void acknowledge(AMQTopicMessageStore store, JournalTopicAck ack, Location location) { 224 AMQTx tx = getTx(ack.getTransactionId(), location); 225 tx.add(store, ack); 226 } 227 228 public Location checkpoint() throws IOException { 229 // Nothing really to checkpoint.. since, we don't 230 // checkpoint tx operations in to long term store until they are 231 // committed. 232 // But we keep track of the first location of an operation 233 // that was associated with an active tx. The journal can not 234 // roll over active tx records. 235 Location minimumLocationInUse = null; 236 synchronized (inflightTransactions) { 237 for (Iterator<AMQTx> iter = inflightTransactions.values().iterator(); iter.hasNext();) { 238 AMQTx tx = iter.next(); 239 Location location = tx.getLocation(); 240 if (minimumLocationInUse == null || location.compareTo(minimumLocationInUse) < 0) { 241 minimumLocationInUse = location; 242 } 243 } 244 } 245 synchronized (preparedTransactions) { 246 for (Iterator<AMQTx> iter = preparedTransactions.values().iterator(); iter.hasNext();) { 247 AMQTx tx = iter.next(); 248 Location location = tx.getLocation(); 249 if (minimumLocationInUse == null || location.compareTo(minimumLocationInUse) < 0) { 250 minimumLocationInUse = location; 251 } 252 } 253 return minimumLocationInUse; 254 } 255 } 256 257 public boolean isDoingRecover() { 258 return doingRecover; 259 } 260 261 /** 262 * @return the preparedTransactions 263 */ 264 public Map<TransactionId, AMQTx> getPreparedTransactions() { 265 return this.preparedTransactions; 266 } 267 268 /** 269 * @param preparedTransactions the preparedTransactions to set 270 */ 271 public void setPreparedTransactions(Map<TransactionId, AMQTx> preparedTransactions) { 272 if (preparedTransactions != null) { 273 this.preparedTransactions.clear(); 274 this.preparedTransactions.putAll(preparedTransactions); 275 } 276 } 277 }