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
238
239
240
241
242
243
244
245
246
247
248
249
|
/**
* Copyright (c) 2004 - 2010 Eike Stepper (Berlin, Germany) and others.
* All rights reserved. This program and the accompanying materials
* are made available under the terms of the Eclipse Public License v1.0
* which accompanies this distribution, and is available at
* http://www.eclipse.org/legal/epl-v10.html
*
* Contributors:
* Eike Stepper - initial API and implementation
*/
package org.eclipse.emf.cdo.internal.net4j;
import org.eclipse.emf.cdo.common.branch.CDOBranch;
import org.eclipse.emf.cdo.common.branch.CDOBranchPoint;
import org.eclipse.emf.cdo.net4j.FailoverCDOSessionConfiguration;
import org.eclipse.emf.cdo.session.CDOSession.ExceptionHandler;
import org.eclipse.emf.cdo.spi.common.branch.CDOBranchUtil;
import org.eclipse.emf.cdo.transaction.CDOTransaction;
import org.eclipse.net4j.connector.IConnector;
import org.eclipse.net4j.signal.RequestWithConfirmation;
import org.eclipse.net4j.signal.SignalProtocol;
import org.eclipse.net4j.signal.failover.IFailOverStrategy;
import org.eclipse.net4j.signal.heartbeat.HeartBeatProtocol;
import org.eclipse.net4j.util.ObjectUtil;
import org.eclipse.net4j.util.WrappedException;
import org.eclipse.net4j.util.container.IManagedContainer;
import org.eclipse.net4j.util.container.IPluginContainer;
import org.eclipse.net4j.util.io.ExtendedDataInputStream;
import org.eclipse.net4j.util.io.ExtendedDataOutputStream;
import org.eclipse.emf.spi.cdo.CDOSessionProtocol;
import org.eclipse.emf.spi.cdo.InternalCDOSession;
import org.eclipse.emf.spi.cdo.InternalCDOView;
import java.util.ArrayList;
import java.util.List;
/**
* @author Eike Stepper
* @since 4.0
*/
public class FailoverCDOSessionConfigurationImpl extends CDONet4jSessionConfigurationImpl implements
FailoverCDOSessionConfiguration
{
private String monitorConnectorDescription;
private IConnector monitorConnector;
private SignalProtocol<Object> monitorProtocol;
private String repositoryGroup;
private String repositoryConnectorDescription;
private String repositoryName;
public FailoverCDOSessionConfigurationImpl(String monitorConnectorDescription, String repositoryGroup)
{
this.monitorConnectorDescription = monitorConnectorDescription;
this.repositoryGroup = repositoryGroup;
}
public String getMonitorConnectorDescription()
{
return monitorConnectorDescription;
}
public String getRepositoryGroup()
{
return repositoryGroup;
}
@Override
public void setRepositoryName(String repositoryName)
{
throw new UnsupportedOperationException();
}
@Override
public void setConnector(IConnector connector)
{
throw new UnsupportedOperationException();
}
@Override
public void setFailOverStrategy(IFailOverStrategy failOverStrategy)
{
throw new UnsupportedOperationException();
}
@Override
public void setExceptionHandler(ExceptionHandler exceptionHandler)
{
throw new UnsupportedOperationException();
}
@Override
public InternalCDOSession createSession()
{
updateConnectorAndRepositoryName();
return new FailoverCDOSessionImpl(this);
}
public void failover(FailoverCDOSessionImpl session)
{
try
{
List<Object> targets = getViewTargets(session);
uncheckedSetPassiveUpdateEnabled(session.options().isPassiveUpdateEnabled());
uncheckedSetPassiveUpdateMode(session.options().getPassiveUpdateMode());
updateConnectorAndRepositoryName();
initProtocol(session);
reregisterViews(session, targets);
reregisterRemoteSessions(session);
System.out.println("Connected");
}
catch (RuntimeException ex)
{
session.deactivate();
throw ex;
}
catch (Error ex)
{
session.deactivate();
throw ex;
}
}
private void updateConnectorAndRepositoryName()
{
System.out.println("Querying fail-over monitor...");
queryRepositoryInfoFromMonitor();
System.out.println("Connecting to " + repositoryConnectorDescription + "/" + repositoryName + "...");
IConnector connector = getConnector(repositoryConnectorDescription);
new HeartBeatProtocol(connector, getContainer()).start(1000L, 5000L);
uncheckedSetConnector(connector);
uncheckedSetRepositoryName(repositoryName);
}
protected void queryRepositoryInfoFromMonitor()
{
if (monitorConnector == null)
{
monitorConnector = getConnector(monitorConnectorDescription);
monitorProtocol = new SignalProtocol<Object>("failover-client");
monitorProtocol.open(monitorConnector);
}
try
{
String oldRepositoryConnectorDescription = repositoryConnectorDescription;
String oldRepositoryName = repositoryName;
while (ObjectUtil.equals(repositoryConnectorDescription, oldRepositoryConnectorDescription)
&& ObjectUtil.equals(repositoryName, oldRepositoryName))
{
new RequestWithConfirmation<Boolean>(monitorProtocol, (short)1, "QueryRepositoryInfo")
{
@Override
protected void requesting(ExtendedDataOutputStream out) throws Exception
{
out.writeString(repositoryGroup);
}
@Override
protected Boolean confirming(ExtendedDataInputStream in) throws Exception
{
repositoryConnectorDescription = in.readString();
repositoryName = in.readString();
return true;
}
}.send();
}
}
catch (Exception ex)
{
throw WrappedException.wrap(ex);
}
finally
{
// protocol.close();
// if (connector.getChannels().isEmpty())
// {
// connector.close();
// }
}
}
protected IConnector getConnector(String description)
{
IManagedContainer container = getContainer();
// container.removeElement("org.eclipse.net4j.connectors", "tcp", description);
return (IConnector)container.getElement("org.eclipse.net4j.connectors", "tcp", description);
}
protected IManagedContainer getContainer()
{
return IPluginContainer.INSTANCE;
}
private List<Object> getViewTargets(FailoverCDOSessionImpl session)
{
List<Object> targets = new ArrayList<Object>();
for (InternalCDOView view : session.getViews())
{
if (view instanceof CDOTransaction)
{
CDOTransaction transaction = (CDOTransaction)view;
targets.add(transaction.getBranch());
}
else
{
targets.add(CDOBranchUtil.copyBranchPoint(view));
}
}
return targets;
}
private void reregisterViews(FailoverCDOSessionImpl session, List<Object> targets)
{
CDOSessionProtocol sessionProtocol = session.getSessionProtocol();
int viewID = 0;
for (Object target : targets)
{
if (target instanceof CDOBranchPoint)
{
CDOBranchPoint branchPoint = (CDOBranchPoint)target;
sessionProtocol.openView(++viewID, branchPoint, true);
}
else
{
CDOBranch branch = (CDOBranch)target;
sessionProtocol.openView(++viewID, branch.getHead(), false);
}
}
}
private void reregisterRemoteSessions(FailoverCDOSessionImpl session)
{
// TODO
}
}
|
