1
|
/**
|
2
|
* '$RCSfile$'
|
3
|
* Purpose: A class to asyncronously force the replication of each server
|
4
|
* that has an entry in the xml_replication table. When run,
|
5
|
* this thread communicates with each server in the list and
|
6
|
* solicites a read of an updated or newly inserted document
|
7
|
* with a certain docid.
|
8
|
* Copyright: 2000 Regents of the University of California and the
|
9
|
* National Center for Ecological Analysis and Synthesis
|
10
|
* Authors: Chad Berkley
|
11
|
*
|
12
|
* '$Author: leinfelder $'
|
13
|
* '$Date: 2013-07-02 16:47:11 -0700 (Tue, 02 Jul 2013) $'
|
14
|
* '$Revision: 7840 $'
|
15
|
*
|
16
|
* This program is free software; you can redistribute it and/or modify
|
17
|
* it under the terms of the GNU General Public License as published by
|
18
|
* the Free Software Foundation; either version 2 of the License, or
|
19
|
* (at your option) any later version.
|
20
|
*
|
21
|
* This program is distributed in the hope that it will be useful,
|
22
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
23
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
24
|
* GNU General Public License for more details.
|
25
|
*
|
26
|
* You should have received a copy of the GNU General Public License
|
27
|
* along with this program; if not, write to the Free Software
|
28
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
29
|
*/
|
30
|
|
31
|
package edu.ucsb.nceas.metacat.replication;
|
32
|
|
33
|
import java.io.IOException;
|
34
|
import java.net.*;
|
35
|
|
36
|
import org.apache.log4j.Logger;
|
37
|
|
38
|
import edu.ucsb.nceas.metacat.properties.PropertyService;
|
39
|
import edu.ucsb.nceas.metacat.shared.ServiceException;
|
40
|
import edu.ucsb.nceas.metacat.util.MetacatUtil;
|
41
|
import edu.ucsb.nceas.utilities.PropertyNotFoundException;
|
42
|
|
43
|
/**
|
44
|
* A class to asyncronously force the replication of each server
|
45
|
* that has an entry in the xml_replication table. When run,
|
46
|
* this thread communicates with each server in the list and
|
47
|
* solicites a read of an updated or newly inserted document
|
48
|
* with a certain docid.
|
49
|
*/
|
50
|
public class ForceReplicationHandler implements Runnable
|
51
|
{
|
52
|
private Thread btThread;
|
53
|
private String docid;
|
54
|
private String action;
|
55
|
private boolean xmlDocument;
|
56
|
private boolean dbactionFlag = true;
|
57
|
private ReplicationServerList serverLists = null;//Serverlist
|
58
|
private int homeServerCode = 0; // home server code for the docid
|
59
|
// When a metacat A got forcereplication
|
60
|
// notification from B, then A will update its record. And A will notification
|
61
|
// other metacat in its serverlist to update this docid if A is a hub. But we
|
62
|
// don't want A to notify B again. B is nofitification of A
|
63
|
private String notificationServer = null;
|
64
|
private static Logger logReplication = Logger.getLogger("ReplicationLogging");
|
65
|
private static Logger logMetacat = Logger.getLogger(ForceReplicationHandler.class);
|
66
|
|
67
|
/**
|
68
|
* Constructor of ForceReplicationHandler
|
69
|
* @param docid the docid to force replicate
|
70
|
* @param the action that is being performed on the document (either
|
71
|
* INSERT or UPDATE)
|
72
|
* @param xml the docid is a xml document or not (data file)
|
73
|
* @param notificationServer, when a metacat A got forcereplication
|
74
|
* notification from B, then A will update its record. And A will notification
|
75
|
* other metacat in its serverlist to update this docid if A is a hub. But we
|
76
|
* don't want A to notify B again. B is nofitification of A.
|
77
|
*/
|
78
|
public ForceReplicationHandler(String docid, String action, boolean xml,
|
79
|
String myNotificationServer)
|
80
|
{
|
81
|
this.docid = docid;
|
82
|
this.action = action;
|
83
|
this.xmlDocument =xml;
|
84
|
// Build a severLists from xml_replication table
|
85
|
this.serverLists = new ReplicationServerList();
|
86
|
// Get sever code for this docid
|
87
|
try
|
88
|
{
|
89
|
this.homeServerCode = ReplicationService.getHomeServerCodeForDocId(docid);
|
90
|
}//try
|
91
|
catch (ServiceException se)
|
92
|
{
|
93
|
logMetacat.error("ForceReplicationHandler() - " + ReplicationService.METACAT_REPL_ERROR_MSG);
|
94
|
logReplication.error("ForceReplicationHandler() - Service issue in constructor: "
|
95
|
+ se.getMessage());
|
96
|
}//catch
|
97
|
// Get the notification server
|
98
|
this.notificationServer = myNotificationServer;
|
99
|
|
100
|
if(this.action.equals(""))
|
101
|
{
|
102
|
dbactionFlag = false;
|
103
|
}
|
104
|
|
105
|
btThread = new Thread(this);
|
106
|
btThread.setPriority(Thread.MIN_PRIORITY);
|
107
|
btThread.start();
|
108
|
}
|
109
|
|
110
|
/**
|
111
|
* Use this constructor when the action is implied.
|
112
|
*/
|
113
|
public ForceReplicationHandler(String docid, boolean xml,
|
114
|
String myNotificationServer )
|
115
|
{
|
116
|
this.docid = docid;
|
117
|
this.xmlDocument = xml;
|
118
|
dbactionFlag = false;
|
119
|
// Build a severLists from xml_replication table
|
120
|
this.serverLists = new ReplicationServerList();
|
121
|
// Get home server code for this doicd
|
122
|
try
|
123
|
{
|
124
|
this.homeServerCode = ReplicationService.getHomeServerCodeForDocId(docid);
|
125
|
}
|
126
|
catch (ServiceException se)
|
127
|
{
|
128
|
logMetacat.error("ForceReplicationHandler() - " + ReplicationService.METACAT_REPL_ERROR_MSG);
|
129
|
logReplication.error("ForceReplicationHandler()- Service issue in constructor: "
|
130
|
+ se.getMessage());
|
131
|
}//catch
|
132
|
// Get notification server
|
133
|
this.notificationServer = myNotificationServer;
|
134
|
btThread = new Thread(this);
|
135
|
btThread.setPriority(Thread.MIN_PRIORITY);
|
136
|
btThread.start();
|
137
|
}
|
138
|
|
139
|
/**
|
140
|
* Method to send force replication command to other server to get
|
141
|
* a new or updated docid
|
142
|
*/
|
143
|
public void run()
|
144
|
{
|
145
|
|
146
|
|
147
|
// URL for notifcation
|
148
|
URL comeAndGetIt = null;
|
149
|
// If no server in xml_replication table, metacat don't need do anything
|
150
|
if (serverLists.isEmpty()) {
|
151
|
return;
|
152
|
}
|
153
|
|
154
|
// Thread seelping for some seconds to make sure the document was insert
|
155
|
// into the database before we send force replication request
|
156
|
int sleepTime;
|
157
|
try {
|
158
|
sleepTime = Integer.parseInt(PropertyService.getProperty("replication.forcereplicationwaitingtime"));
|
159
|
Thread.sleep(sleepTime);
|
160
|
} catch (PropertyNotFoundException pnfe) {
|
161
|
logMetacat.error("ForceReplicationHandler.run - " + ReplicationService.METACAT_REPL_ERROR_MSG);
|
162
|
logReplication.error("ForceReplicationHandler.run - property error: " + pnfe.getMessage());
|
163
|
} catch (InterruptedException ie) {
|
164
|
logMetacat.error("ForceReplicationHandler.run - " + ReplicationService.METACAT_REPL_ERROR_MSG);
|
165
|
logReplication.error("ForceReplicationHandler.run - Thread sleep error: " + ie.getMessage());
|
166
|
}
|
167
|
logReplication.info("ForceReplicationHandler.run - notification server:" + notificationServer);
|
168
|
// Check every server in the serverlists
|
169
|
for (int i = 0; i < serverLists.size(); i++) {
|
170
|
//Set comeAndGetIt null
|
171
|
comeAndGetIt = null;
|
172
|
// Get ReplicationServer object in index i
|
173
|
ReplicationServer replicationServer = serverLists.serverAt(i);
|
174
|
// Get this ReplicationServer 's name
|
175
|
String server = replicationServer.getServerName();
|
176
|
try {
|
177
|
|
178
|
// If the server is the notification server, we don't notify it back
|
179
|
// again, if server is null we don't replication it
|
180
|
if (server != null && !server.equals(notificationServer)) {
|
181
|
|
182
|
if (dbactionFlag) {
|
183
|
// xml documents and server can replicate xml doucment
|
184
|
if (xmlDocument && replicationServer.getReplication()) {
|
185
|
// If this docid's homeserver is localhost, replicate it
|
186
|
if (homeServerCode == 1) {
|
187
|
logReplication.info("ForceReplicationHandler.run - force xml replicating to "
|
188
|
+ server);
|
189
|
comeAndGetIt = new URL("https://" + server
|
190
|
+ "?action=forcereplicate&server="
|
191
|
+ MetacatUtil.getLocalReplicationServerName()
|
192
|
+ "&docid=" + docid + "&dbaction=" + action);
|
193
|
//over write the url for delete
|
194
|
if (action != null && (action.equals(ReplicationService.FORCEREPLICATEDELETE) || action.equals(ReplicationService.FORCEREPLICATEDELETEALL))) {
|
195
|
comeAndGetIt = new URL("https://" + server
|
196
|
+ "?action="
|
197
|
+ action
|
198
|
+ "&docid=" + docid + "&server="
|
199
|
+ MetacatUtil.getLocalReplicationServerName());
|
200
|
|
201
|
}
|
202
|
}//if servercode==1
|
203
|
else if (replicationServer.getHub()
|
204
|
|| server.equals(ReplicationService
|
205
|
.getServerNameForServerCode(homeServerCode))) {
|
206
|
// If the docid's home server is not local host, but local host
|
207
|
// is a hub of this server, replicate the docid too.
|
208
|
// If the server is homeserver of the docid, replication it too
|
209
|
logReplication.info("ForceReplicationHandler.run - force xml replicating to "
|
210
|
+ server);
|
211
|
comeAndGetIt = new URL("https://" + server
|
212
|
+ "?action=forcereplicate&server="
|
213
|
+ MetacatUtil.getLocalReplicationServerName()
|
214
|
+ "&docid=" + docid + "&dbaction=" + action);
|
215
|
//over write the url for delete
|
216
|
if (action != null && (action.equals(ReplicationService.FORCEREPLICATEDELETE) || action.equals(ReplicationService.FORCEREPLICATEDELETEALL))) {
|
217
|
comeAndGetIt = new URL("https://" + server
|
218
|
+ "?action="
|
219
|
+ action
|
220
|
+ "&docid=" + docid + "&server="
|
221
|
+ MetacatUtil.getLocalReplicationServerName());
|
222
|
|
223
|
}
|
224
|
}//else
|
225
|
|
226
|
}//if xmlDocument
|
227
|
//It is data file and configured to handle data replication
|
228
|
else if (replicationServer.getDataReplication()) {
|
229
|
// If the docid's home server is local host, replicate the docid
|
230
|
if (homeServerCode == 1) {
|
231
|
logReplication.info("ForceReplicationHandler.run - force data replicating to "
|
232
|
+ server);
|
233
|
comeAndGetIt = new URL("https://" + server
|
234
|
+ "?action=forcereplicatedatafile&server="
|
235
|
+ MetacatUtil.getLocalReplicationServerName()
|
236
|
+ "&docid=" + docid + "&dbaction=" + action);
|
237
|
//over write the url for delete
|
238
|
if (action != null && (action.equals(ReplicationService.FORCEREPLICATEDELETE) || action.equals(ReplicationService.FORCEREPLICATEDELETEALL))) {
|
239
|
comeAndGetIt = new URL("https://" + server
|
240
|
+ "?action="
|
241
|
+ action
|
242
|
+ "&docid=" + docid + "&server="
|
243
|
+ MetacatUtil.getLocalReplicationServerName());
|
244
|
|
245
|
}
|
246
|
|
247
|
}//if serverCode==1
|
248
|
else if (replicationServer.getHub()
|
249
|
|| server.equals(ReplicationService
|
250
|
.getServerNameForServerCode(homeServerCode))) {
|
251
|
// If the docid's home server is not local host, but local host
|
252
|
// is a hub of this server, replicate the docid too.
|
253
|
// If the server is homeserver of the docid replication it too
|
254
|
logReplication.info("ForceReplicationHandler.run - force data replicating to "
|
255
|
+ server);
|
256
|
comeAndGetIt = new URL("https://" + server
|
257
|
+ "?action=forcereplicatedatafile&server="
|
258
|
+ MetacatUtil.getLocalReplicationServerName()
|
259
|
+ "&docid=" + docid + "&dbaction=" + action);
|
260
|
//over write the url for delete
|
261
|
if (action != null && (action.equals(ReplicationService.FORCEREPLICATEDELETE) || action.equals(ReplicationService.FORCEREPLICATEDELETEALL))) {
|
262
|
comeAndGetIt = new URL("https://" + server
|
263
|
+ "?action="
|
264
|
+ action
|
265
|
+ "&docid=" + docid + "&server="
|
266
|
+ MetacatUtil.getLocalReplicationServerName());
|
267
|
|
268
|
}
|
269
|
|
270
|
}//else if servercode==1
|
271
|
}//else if data file
|
272
|
|
273
|
}//if has explicite action
|
274
|
else { // has implicite action
|
275
|
logReplication.info("ForceReplicationHandler.run - force replicating (default action) to )"
|
276
|
+ server);
|
277
|
// this docid is xml documents and can replicate xml doucment
|
278
|
if (xmlDocument && replicationServer.getReplication()) {
|
279
|
// If homeserver of this doicd is local, replicate it
|
280
|
if (homeServerCode == 1) {
|
281
|
comeAndGetIt = new URL("https://" + server
|
282
|
+ "?action=forcereplicate&server="
|
283
|
+ MetacatUtil.getLocalReplicationServerName()
|
284
|
+ "&docid=" + docid);
|
285
|
|
286
|
}//if homeserver ==1
|
287
|
else if (replicationServer.getHub()
|
288
|
|| server.equals(ReplicationService
|
289
|
.getServerNameForServerCode(homeServerCode))) {
|
290
|
// If home server of this docid is not local host, but local
|
291
|
// host is a hub for this server, replicate this doicd
|
292
|
// If the server is homeserver of the docid, replication it too
|
293
|
comeAndGetIt = new URL("https://" + server
|
294
|
+ "?action=forcereplicate&server="
|
295
|
+ MetacatUtil.getLocalReplicationServerName()
|
296
|
+ "&docid=" + docid);
|
297
|
|
298
|
}//else if
|
299
|
|
300
|
}//if xmlDoucment
|
301
|
else if (replicationServer.getDataReplication()) { //It is datafile and server is configured to replicate data file
|
302
|
|
303
|
//if home server is local host, replicate the data file
|
304
|
if (homeServerCode == 1) {
|
305
|
comeAndGetIt = new URL("https://" + server
|
306
|
+ "?action=forcereplicatedatafile&server="
|
307
|
+ MetacatUtil.getLocalReplicationServerName()
|
308
|
+ "&docid=" + docid);
|
309
|
}//if
|
310
|
else if (replicationServer.getHub()
|
311
|
|| server.equals(ReplicationService
|
312
|
.getServerNameForServerCode(homeServerCode))) {
|
313
|
// If home server is not local host, but the local host is a hub
|
314
|
// For this server, replicate the data file
|
315
|
// If the server is homeserver of the docid, replication it too
|
316
|
comeAndGetIt = new URL("https://" + server
|
317
|
+ "?action=forcereplicatedatafile&server="
|
318
|
+ MetacatUtil.getLocalReplicationServerName()
|
319
|
+ "&docid=" + docid);
|
320
|
|
321
|
}//else
|
322
|
}//else if
|
323
|
}//else has implicit action
|
324
|
|
325
|
//Make sure comeAndGetIt is not empty
|
326
|
if (comeAndGetIt != null && !comeAndGetIt.equals("")) {
|
327
|
logReplication.warn("ForceReplicationHandler.run - sending message: " + comeAndGetIt.toString());
|
328
|
String message = ReplicationService.getURLContent(comeAndGetIt);
|
329
|
}
|
330
|
//send out the url. message is a dummy variable as the target of
|
331
|
//the URL never directly replies to the request. this simply
|
332
|
//invoces a read request from the server to this local machine.
|
333
|
}//if notification server
|
334
|
} catch (MalformedURLException mue) {
|
335
|
logMetacat.error("ForceReplicationHandler.run - " + ReplicationService.METACAT_REPL_ERROR_MSG);
|
336
|
logReplication.error("ForceReplicationHandler.run - URL error in ForceReplicationHandler.run for server "
|
337
|
+ server + " : " + mue.getMessage());
|
338
|
// mue.printStackTrace();
|
339
|
} catch (IOException io) {
|
340
|
logMetacat.error("ForceReplicationHandler.run - " + ReplicationService.METACAT_REPL_ERROR_MSG);
|
341
|
logReplication.error("ForceReplicationHandler.run - I/O error in ForceReplicationHandler.run for server "
|
342
|
+ server + " : " + io.getMessage());
|
343
|
}
|
344
|
}//for
|
345
|
|
346
|
logReplication.warn("ForceReplicationHandler.run - exiting ForceReplicationHandler Thread");
|
347
|
}//run
|
348
|
}//ForceReplication class
|