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
186
187
188
189
190
191
192
193
194
195
196
197
198
199
200
201
202
203
204
205
206
207
208
209
210
211
212
213
214
215
216
217
218
219
220
221
222
223
224
225
226
227
228
229
230
231
232
233
234
235
236
237
|
/*
*
* 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.virtualhostnode.berkeleydb;
import java.util.Map;
import java.util.Set;
import com.sleepycat.je.rep.MasterStateException;
import org.apache.log4j.Logger;
import org.apache.qpid.server.configuration.IllegalConfigurationException;
import org.apache.qpid.server.logging.EventLogger;
import org.apache.qpid.server.logging.messages.HighAvailabilityMessages;
import org.apache.qpid.server.logging.subjects.BDBHAVirtualHostNodeLogSubject;
import org.apache.qpid.server.logging.subjects.GroupLogSubject;
import org.apache.qpid.server.model.AbstractConfiguredObject;
import org.apache.qpid.server.model.Broker;
import org.apache.qpid.server.model.ConfiguredObject;
import org.apache.qpid.server.model.IllegalStateTransitionException;
import org.apache.qpid.server.model.ManagedAttributeField;
import org.apache.qpid.server.model.State;
import org.apache.qpid.server.model.StateTransition;
import org.apache.qpid.server.model.SystemConfig;
import org.apache.qpid.server.model.VirtualHostNode;
import org.apache.qpid.server.store.berkeleydb.replication.ReplicatedEnvironmentFacade;
public class BDBHARemoteReplicationNodeImpl extends AbstractConfiguredObject<BDBHARemoteReplicationNodeImpl> implements BDBHARemoteReplicationNode<BDBHARemoteReplicationNodeImpl>
{
private static final Logger LOGGER = Logger.getLogger(BDBHARemoteReplicationNodeImpl.class);
private final ReplicatedEnvironmentFacade _replicatedEnvironmentFacade;
private final String _address;
private final Broker _broker;
private volatile long _joinTime;
private volatile long _lastTransactionId;
@ManagedAttributeField(afterSet="afterSetRole")
private volatile NodeRole _role;
private final boolean _isMonitor;
private BDBHAVirtualHostNodeLogSubject _virtualHostNodeLogSubject;
private GroupLogSubject _groupLogSubject;
private volatile NodeRole _lastKnownRole;
public BDBHARemoteReplicationNodeImpl(BDBHAVirtualHostNode<?> virtualHostNode, Map<String, Object> attributes, ReplicatedEnvironmentFacade replicatedEnvironmentFacade)
{
super(parentsMap(virtualHostNode), attributes);
_broker = virtualHostNode.getParent(Broker.class);
_address = (String)attributes.get(ADDRESS);
_replicatedEnvironmentFacade = replicatedEnvironmentFacade;
setState(State.ACTIVE);
_role = NodeRole.UNREACHABLE;
_lastKnownRole = NodeRole.UNREACHABLE;
_isMonitor = (Boolean)attributes.get(MONITOR);
}
@Override
public String getGroupName()
{
return _replicatedEnvironmentFacade.getGroupName();
}
@Override
public String getAddress()
{
return _address;
}
@Override
public NodeRole getRole()
{
return _lastKnownRole;
}
@Override
public long getJoinTime()
{
return _joinTime;
}
@Override
public long getLastKnownReplicationTransactionId()
{
return _lastTransactionId;
}
@Override
public boolean isMonitor()
{
return _isMonitor;
}
@Override
public void deleted()
{
super.deleted();
}
@Override
public String toString()
{
return getClass().getSimpleName() + "[id=" + getId() + ", name=" + getName() + ", address=" + getAddress()
+ ", state=" + getState() + ", role=" + getRole() + "]";
}
@StateTransition(currentState = {State.ACTIVE, State.UNAVAILABLE}, desiredState = State.DELETED)
private void doDelete()
{
String nodeName = getName();
getEventLogger().message(_virtualHostNodeLogSubject, HighAvailabilityMessages.DELETED());
try
{
_replicatedEnvironmentFacade.removeNodeFromGroup(nodeName);
setState(State.DELETED);
deleted();
}
catch(MasterStateException e)
{
throw new IllegalStateTransitionException("Node '" + nodeName + "' cannot be deleted when role is a master");
}
catch (Exception e)
{
throw new IllegalStateTransitionException("Unexpected exception on node '" + nodeName + "' deletion", e);
}
}
protected void afterSetRole()
{
try
{
String nodeName = getName();
getEventLogger().message(_groupLogSubject, HighAvailabilityMessages.TRANSFER_MASTER(getName(), getAddress()));
_replicatedEnvironmentFacade.transferMasterAsynchronously(nodeName);
}
catch (Exception e)
{
throw new IllegalConfigurationException("Cannot transfer mastership to '" + getName() + "'", e);
}
}
@Override
protected void validateChange(final ConfiguredObject<?> proxyForValidation, final Set<String> changedAttributes)
{
super.validateChange(proxyForValidation, changedAttributes);
if (changedAttributes.contains(ROLE))
{
NodeRole currentRole = getRole();
if (NodeRole.REPLICA != currentRole)
{
throw new IllegalArgumentException("Cannot transfer mastership when not in replica role."
+ " Current role " + currentRole);
}
NodeRole newRole = (NodeRole) ((BDBHARemoteReplicationNode<?>) proxyForValidation).getAttribute(ROLE);
if (NodeRole.MASTER != newRole)
{
throw new IllegalArgumentException("Changing role to other value then " + NodeRole.MASTER + " is unsupported");
}
}
if (changedAttributes.contains(JOIN_TIME))
{
throw new IllegalArgumentException("Cannot change derived attribute " + JOIN_TIME);
}
if (changedAttributes.contains(LAST_KNOWN_REPLICATION_TRANSACTION_ID))
{
throw new IllegalArgumentException("Cannot change derived attribute " + LAST_KNOWN_REPLICATION_TRANSACTION_ID);
}
}
void setRole(NodeRole role)
{
_lastKnownRole = role;
_role = role;
updateModelStateFromRole(role);
}
void setJoinTime(long joinTime)
{
_joinTime = joinTime;
}
void setLastTransactionId(long lastTransactionId)
{
_lastTransactionId = lastTransactionId;
}
private void updateModelStateFromRole(NodeRole role)
{
State currentState = getState();
if (currentState == State.DELETED)
{
return;
}
boolean isActive = NodeRole.MASTER == role || NodeRole.REPLICA == role;
setState(isActive ? State.ACTIVE : State.UNAVAILABLE);
}
@Override
public void onValidate()
{
super.onValidate();
_virtualHostNodeLogSubject = new BDBHAVirtualHostNodeLogSubject(getGroupName(), getName());
_groupLogSubject = new GroupLogSubject(getGroupName());
}
private EventLogger getEventLogger()
{
return ((SystemConfig)getParent(VirtualHostNode.class).getParent(Broker.class).getParent(SystemConfig.class)).getEventLogger();
}
}
|
