1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
|
/*
*
* Licensed to the Apache Software Foundation (ASF) under one
* or more contributor license agreements. See the NOTICE file
* distributed with this work for additional information
* regarding copyright ownership. The ASF licenses this file
* to you under the Apache License, Version 2.0 (the
* "License"); you may not use this file except in compliance
* with the License. You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing,
* software distributed under the License is distributed on an
* "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY
* KIND, either express or implied. See the License for the
* specific language governing permissions and limitations
* under the License.
*
*/
package org.apache.qpid.server.store.berkeleydb;
import java.util.HashMap;
import java.util.Map;
import org.apache.log4j.Logger;
import org.apache.qpid.server.connection.IConnectionRegistry;
import org.apache.qpid.server.logging.messages.MessageStoreMessages;
import org.apache.qpid.server.logging.subjects.MessageStoreLogSubject;
import org.apache.qpid.server.model.VirtualHost;
import org.apache.qpid.server.stats.StatisticsGatherer;
import org.apache.qpid.server.store.ConfiguredObjectRecordRecoveverAndUpgrader;
import org.apache.qpid.server.store.DurableConfigurationStore;
import org.apache.qpid.server.store.MessageStore;
import org.apache.qpid.server.store.berkeleydb.replication.ReplicatedEnvironmentFacade;
import org.apache.qpid.server.store.berkeleydb.replication.ReplicatedEnvironmentFacadeFactory;
import org.apache.qpid.server.store.handler.ConfiguredObjectRecordHandler;
import org.apache.qpid.server.virtualhost.AbstractVirtualHost;
import org.apache.qpid.server.virtualhost.MessageStoreRecoverer;
import org.apache.qpid.server.virtualhost.State;
import org.apache.qpid.server.virtualhost.VirtualHostRegistry;
import com.sleepycat.je.rep.StateChangeEvent;
import com.sleepycat.je.rep.StateChangeListener;
public class BDBHAVirtualHost extends AbstractVirtualHost
{
private static final Logger LOGGER = Logger.getLogger(BDBHAVirtualHost.class);
private BDBMessageStore _messageStore;
private MessageStoreLogSubject _messageStoreLogSubject;
BDBHAVirtualHost(VirtualHostRegistry virtualHostRegistry,
StatisticsGatherer brokerStatisticsGatherer,
org.apache.qpid.server.security.SecurityManager parentSecurityManager,
VirtualHost virtualHost)
{
super(virtualHostRegistry, brokerStatisticsGatherer, parentSecurityManager, virtualHost);
}
protected void initialiseStorage(VirtualHost virtualHost)
{
setState(State.PASSIVE);
_messageStoreLogSubject = new MessageStoreLogSubject(getName(), BDBMessageStore.class.getSimpleName());
_messageStore = new BDBMessageStore(new ReplicatedEnvironmentFacadeFactory());
getEventLogger().message(_messageStoreLogSubject, MessageStoreMessages.CREATED());
Map<String, Object> messageStoreSettings = new HashMap<String, Object>(virtualHost.getMessageStoreSettings());
messageStoreSettings.put(DurableConfigurationStore.IS_MESSAGE_STORE_TOO, true);
_messageStore.openConfigurationStore(virtualHost, messageStoreSettings);
_messageStore.openMessageStore(virtualHost, messageStoreSettings);
getEventLogger().message(_messageStoreLogSubject, MessageStoreMessages.STORE_LOCATION(_messageStore.getStoreLocation()));
// Make the virtualhost model object a replication group listener
ReplicatedEnvironmentFacade environmentFacade = (ReplicatedEnvironmentFacade) _messageStore.getEnvironmentFacade();
environmentFacade.setStateChangeListener(new BDBHAMessageStoreStateChangeListener());
}
@Override
public DurableConfigurationStore getDurableConfigurationStore()
{
return _messageStore;
}
@Override
public MessageStore getMessageStore()
{
return _messageStore;
}
private void activate()
{
try
{
_messageStore.getEnvironmentFacade().getEnvironment().flushLog(true);
ConfiguredObjectRecordHandler upgraderRecoverer = new ConfiguredObjectRecordRecoveverAndUpgrader(this, getDurableConfigurationRecoverers());
_messageStore.visitConfiguredObjectRecords(upgraderRecoverer);
initialiseModel();
new MessageStoreRecoverer(this, getMessageStoreLogSubject()).recover();
attainActivation();
}
catch (Exception e)
{
LOGGER.error("Failed to activate on hearing MASTER change event", e);
}
}
private void passivate()
{
State finalState = State.ERRORED;
try
{
/* the approach here is not ideal as there is a race condition where a
* queue etc could be created while the virtual host is on the way to
* the passivated state. However the store state change from MASTER to UNKNOWN
* is documented as exceptionally rare.
*/
getConnectionRegistry().close(IConnectionRegistry.VHOST_PASSIVATE_REPLY_TEXT);
removeHouseKeepingTasks();
getQueueRegistry().stopAllAndUnregisterMBeans();
getExchangeRegistry().clearAndUnregisterMbeans();
getDtxRegistry().close();
finalState = State.PASSIVE;
}
finally
{
setState(finalState);
reportIfError(getState());
}
}
@Override
protected MessageStoreLogSubject getMessageStoreLogSubject()
{
return _messageStoreLogSubject;
}
private class BDBHAMessageStoreStateChangeListener implements StateChangeListener
{
@Override
public void stateChange(StateChangeEvent stateChangeEvent) throws RuntimeException
{
com.sleepycat.je.rep.ReplicatedEnvironment.State state = stateChangeEvent.getState();
if (LOGGER.isInfoEnabled())
{
LOGGER.info("Received BDB event indicating transition to state " + state);
}
switch (state)
{
case MASTER:
activate();
break;
case REPLICA:
passivate();
break;
case DETACHED:
LOGGER.error("BDB replicated node in detached state, therefore passivating.");
passivate();
break;
case UNKNOWN:
LOGGER.warn("BDB replicated node in unknown state (hopefully temporarily)");
break;
default:
LOGGER.error("Unexpected state change: " + state);
throw new IllegalStateException("Unexpected state change: " + state);
}
}
}
}
|
