1 |
522
|
berkley
|
/**
|
2 |
|
|
* '$RCSfile$'
|
3 |
|
|
* Purpose: A class to asyncronously do delta-T replication checking
|
4 |
|
|
* Copyright: 2000 Regents of the University of California and the
|
5 |
|
|
* National Center for Ecological Analysis and Synthesis
|
6 |
|
|
* Authors: Chad Berkley
|
7 |
|
|
* Release: @release@
|
8 |
|
|
*
|
9 |
|
|
* '$Author$'
|
10 |
|
|
* '$Date$'
|
11 |
|
|
* '$Revision$'
|
12 |
669
|
jones
|
*
|
13 |
|
|
* This program is free software; you can redistribute it and/or modify
|
14 |
|
|
* it under the terms of the GNU General Public License as published by
|
15 |
|
|
* the Free Software Foundation; either version 2 of the License, or
|
16 |
|
|
* (at your option) any later version.
|
17 |
|
|
*
|
18 |
|
|
* This program is distributed in the hope that it will be useful,
|
19 |
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
20 |
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
21 |
|
|
* GNU General Public License for more details.
|
22 |
|
|
*
|
23 |
|
|
* You should have received a copy of the GNU General Public License
|
24 |
|
|
* along with this program; if not, write to the Free Software
|
25 |
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
26 |
522
|
berkley
|
*/
|
27 |
|
|
|
28 |
|
|
package edu.ucsb.nceas.metacat;
|
29 |
|
|
|
30 |
|
|
import java.sql.*;
|
31 |
|
|
import java.util.*;
|
32 |
|
|
import java.lang.Thread;
|
33 |
|
|
import java.io.*;
|
34 |
|
|
import java.net.*;
|
35 |
543
|
berkley
|
import java.text.*;
|
36 |
522
|
berkley
|
import org.xml.sax.AttributeList;
|
37 |
|
|
import org.xml.sax.ContentHandler;
|
38 |
|
|
import org.xml.sax.DTDHandler;
|
39 |
|
|
import org.xml.sax.EntityResolver;
|
40 |
|
|
import org.xml.sax.ErrorHandler;
|
41 |
|
|
import org.xml.sax.InputSource;
|
42 |
|
|
import org.xml.sax.XMLReader;
|
43 |
|
|
import org.xml.sax.SAXException;
|
44 |
|
|
import org.xml.sax.SAXParseException;
|
45 |
|
|
import org.xml.sax.helpers.XMLReaderFactory;
|
46 |
561
|
berkley
|
import org.xml.sax.helpers.DefaultHandler;
|
47 |
522
|
berkley
|
|
48 |
561
|
berkley
|
|
49 |
|
|
|
50 |
522
|
berkley
|
/**
|
51 |
|
|
* This class handles deltaT replication checking. Whenever this TimerTask
|
52 |
|
|
* is fired it checks each server in xml_replication for updates and updates
|
53 |
|
|
* the local db as needed.
|
54 |
|
|
*/
|
55 |
|
|
public class ReplicationHandler extends TimerTask
|
56 |
|
|
{
|
57 |
573
|
berkley
|
int serverCheckCode = 1;
|
58 |
522
|
berkley
|
MetaCatUtil util = new MetaCatUtil();
|
59 |
1292
|
tao
|
ReplicationServerList serverList = null;
|
60 |
522
|
berkley
|
PrintWriter out;
|
61 |
|
|
|
62 |
|
|
public ReplicationHandler(PrintWriter o)
|
63 |
|
|
{
|
64 |
|
|
this.out = o;
|
65 |
1292
|
tao
|
serverList = new ReplicationServerList();
|
66 |
522
|
berkley
|
}
|
67 |
|
|
|
68 |
573
|
berkley
|
public ReplicationHandler(PrintWriter o, int serverCheckCode)
|
69 |
|
|
{
|
70 |
|
|
this.out = o;
|
71 |
|
|
this.serverCheckCode = serverCheckCode;
|
72 |
1292
|
tao
|
serverList = new ReplicationServerList();
|
73 |
573
|
berkley
|
}
|
74 |
|
|
|
75 |
522
|
berkley
|
/**
|
76 |
|
|
* Method that implements TimerTask.run(). It runs whenever the timer is
|
77 |
|
|
* fired.
|
78 |
|
|
*/
|
79 |
|
|
public void run()
|
80 |
|
|
{
|
81 |
|
|
//find out the last_checked time of each server in the server list and
|
82 |
|
|
//send a query to each server to see if there are any documents in
|
83 |
|
|
//xml_documents with an update_date > last_checked
|
84 |
|
|
try
|
85 |
|
|
{
|
86 |
1032
|
tao
|
//if serverList is null, metacat don't need to replication
|
87 |
|
|
if (serverList==null||serverList.isEmpty())
|
88 |
|
|
{
|
89 |
|
|
return;
|
90 |
|
|
}
|
91 |
1292
|
tao
|
updateCatalog();
|
92 |
|
|
update();
|
93 |
1217
|
tao
|
//conn.close();
|
94 |
|
|
}//try
|
95 |
522
|
berkley
|
catch (Exception e)
|
96 |
|
|
{
|
97 |
1217
|
tao
|
MetaCatUtil.debugMessage("Error in replicationHandler.run():"
|
98 |
|
|
+e.getMessage(), 30);
|
99 |
1292
|
tao
|
e.printStackTrace();
|
100 |
1217
|
tao
|
}//catch
|
101 |
522
|
berkley
|
}
|
102 |
|
|
|
103 |
|
|
/**
|
104 |
577
|
berkley
|
* Method that uses revision taging for replication instead of update_date.
|
105 |
|
|
*/
|
106 |
1292
|
tao
|
private void update()
|
107 |
577
|
berkley
|
{
|
108 |
|
|
/*
|
109 |
|
|
Pseudo-algorithm
|
110 |
|
|
- request a doc list from each server in xml_replication
|
111 |
|
|
- check the rev number of each of those documents agains the
|
112 |
|
|
documents in the local database
|
113 |
|
|
- pull any documents that have a lesser rev number on the local server
|
114 |
|
|
from the remote server
|
115 |
|
|
- delete any documents that still exist in the local xml_documents but
|
116 |
|
|
are in the deletedDocuments tag of the remote host response.
|
117 |
|
|
- update last_checked to keep track of the last time it was checked.
|
118 |
|
|
(this info is theoretically not needed using this system but probably
|
119 |
|
|
should be kept anyway)
|
120 |
|
|
*/
|
121 |
683
|
berkley
|
|
122 |
1217
|
tao
|
DBConnection dbConn = null;
|
123 |
|
|
int serialNumber = -1;
|
124 |
1292
|
tao
|
|
125 |
|
|
ReplicationServer replServer = null; // Variable to store the
|
126 |
|
|
// ReplicationServer got from
|
127 |
|
|
// Server list
|
128 |
|
|
String server; // Variable to store server name
|
129 |
577
|
berkley
|
String update;
|
130 |
|
|
ReplMessageHandler message = new ReplMessageHandler();
|
131 |
|
|
Vector responses = new Vector();
|
132 |
667
|
berkley
|
PreparedStatement pstmt = null;
|
133 |
577
|
berkley
|
ResultSet rs;
|
134 |
|
|
boolean tablehasrows;
|
135 |
1292
|
tao
|
boolean flag=false; // If a document need to update
|
136 |
1037
|
tao
|
boolean dataFile=false;
|
137 |
577
|
berkley
|
String action = new String();
|
138 |
|
|
XMLReader parser;
|
139 |
|
|
URL u;
|
140 |
|
|
|
141 |
|
|
try
|
142 |
|
|
{
|
143 |
1292
|
tao
|
// Get DBConnection from pool
|
144 |
1217
|
tao
|
dbConn=DBConnectionPool.
|
145 |
|
|
getDBConnection("ReplicationHandler.update");
|
146 |
|
|
serialNumber=dbConn.getCheckOutSerialNumber();
|
147 |
1292
|
tao
|
MetaCatUtil.debugMessage("init parser", 50);
|
148 |
577
|
berkley
|
parser = initParser(message);
|
149 |
1292
|
tao
|
//Check for every server in server list
|
150 |
|
|
for (int i=0; i<serverList.size(); i++)
|
151 |
577
|
berkley
|
{
|
152 |
1292
|
tao
|
// Get ReplicationServer object from server list
|
153 |
|
|
replServer = serverList.serverAt(i);
|
154 |
|
|
// Get server name from ReplicationServer object
|
155 |
|
|
server = replServer.getServerName();
|
156 |
584
|
berkley
|
MetacatReplication.replLog("full update started to: " + server);
|
157 |
1292
|
tao
|
// Send command to that server to get updated docid information
|
158 |
1011
|
tao
|
u = new URL("https://" + server + "?server="
|
159 |
1015
|
tao
|
+util.getLocalReplicationServerName()+"&action=update");
|
160 |
1292
|
tao
|
MetaCatUtil.debugMessage("Sending infomation " +u.toString(), 50);
|
161 |
|
|
// Get information from remote server
|
162 |
|
|
String result = null;
|
163 |
|
|
try
|
164 |
|
|
{
|
165 |
|
|
result = MetacatReplication.getURLContent(u);
|
166 |
|
|
}//try
|
167 |
|
|
catch (Exception e)
|
168 |
|
|
{
|
169 |
|
|
|
170 |
|
|
MetaCatUtil.debugMessage("Error in get docid information from "+
|
171 |
|
|
server+" :"+e.getMessage(), 30);
|
172 |
|
|
continue;
|
173 |
|
|
}//catch
|
174 |
|
|
MetaCatUtil.debugMessage("docid: "+server+" "+result, 50);
|
175 |
|
|
//check if result have error or not, if has skip it.
|
176 |
1102
|
tao
|
if (result.indexOf("error")!=-1)
|
177 |
|
|
{
|
178 |
|
|
continue;
|
179 |
|
|
}
|
180 |
577
|
berkley
|
responses.add(result);
|
181 |
|
|
}
|
182 |
|
|
|
183 |
1032
|
tao
|
//make sure that there is updated file list
|
184 |
1292
|
tao
|
//If response is null, metacat don't need do anything
|
185 |
1032
|
tao
|
if (responses==null||responses.isEmpty())
|
186 |
|
|
{
|
187 |
|
|
return;
|
188 |
|
|
}
|
189 |
1292
|
tao
|
|
190 |
1032
|
tao
|
|
191 |
1292
|
tao
|
MetaCatUtil.debugMessage("Responses from remote metacat about updated "+
|
192 |
|
|
"document information: "+ responses.toString(), 30);
|
193 |
577
|
berkley
|
|
194 |
|
|
for(int i=0; i<responses.size(); i++)
|
195 |
|
|
{ //check each server for updated files
|
196 |
|
|
parser.parse(new InputSource(
|
197 |
|
|
new StringReader(
|
198 |
|
|
(String)(responses.elementAt(i)))));
|
199 |
1037
|
tao
|
//v is the list of updated documents
|
200 |
577
|
berkley
|
Vector v = new Vector(message.getUpdatesVect());
|
201 |
|
|
//System.out.println("v: " + v.toString());
|
202 |
1037
|
tao
|
//d is the list of deleted documents
|
203 |
577
|
berkley
|
Vector d = new Vector(message.getDeletesVect());
|
204 |
1037
|
tao
|
//System.out.println("d: " + d.toString());
|
205 |
1292
|
tao
|
MetaCatUtil.debugMessage("Update vector size: "+ v.size(), 40);
|
206 |
|
|
MetaCatUtil.debugMessage("Delete vector size: "+ d.size(),40);
|
207 |
577
|
berkley
|
//check the revs in u to see if there are any newer ones than
|
208 |
|
|
//in the local DB.
|
209 |
|
|
for(int j=0; j<v.size(); j++)
|
210 |
|
|
{
|
211 |
1037
|
tao
|
//initial dataFile is false
|
212 |
|
|
dataFile=false;
|
213 |
|
|
//w is information for one document, information contain
|
214 |
|
|
//docid, rev, server or datafile.
|
215 |
577
|
berkley
|
Vector w = new Vector((Vector)(v.elementAt(j)));
|
216 |
1037
|
tao
|
//Check if the vector w contain "datafile"
|
217 |
|
|
//If it has, this document is data file
|
218 |
|
|
if (w.contains((String)util.getOption("datafileflag")))
|
219 |
|
|
{
|
220 |
|
|
dataFile=true;
|
221 |
|
|
}
|
222 |
577
|
berkley
|
//System.out.println("w: " + w.toString());
|
223 |
1292
|
tao
|
// Get docid
|
224 |
577
|
berkley
|
String docid = (String)w.elementAt(0);
|
225 |
1071
|
tao
|
MetaCatUtil.debugMessage("docid: " + docid, 40);
|
226 |
1292
|
tao
|
// Get revision number
|
227 |
577
|
berkley
|
int rev = Integer.parseInt((String)w.elementAt(1));
|
228 |
1071
|
tao
|
MetaCatUtil.debugMessage("rev: " + rev, 40);
|
229 |
1292
|
tao
|
// Get remote server name (it is may not be doc homeserver because
|
230 |
|
|
// the new hub feature
|
231 |
|
|
String remoteServer = (String)w.elementAt(2);
|
232 |
1071
|
tao
|
|
233 |
1292
|
tao
|
// Choose revision number from local host
|
234 |
|
|
pstmt = dbConn.prepareStatement("select rev from xml_documents where "
|
235 |
|
|
+ "docid like '" + docid + "'");
|
236 |
577
|
berkley
|
pstmt.execute();
|
237 |
|
|
rs = pstmt.getResultSet();
|
238 |
|
|
tablehasrows = rs.next();
|
239 |
|
|
if(tablehasrows)
|
240 |
|
|
{ //check the revs for an update because this document is in the
|
241 |
1292
|
tao
|
//local DB, it might be out of date.
|
242 |
577
|
berkley
|
int localrev = rs.getInt(1);
|
243 |
|
|
if(localrev == rev)
|
244 |
|
|
{
|
245 |
1292
|
tao
|
// Local meatacat has the same rev to remote host, don't need
|
246 |
|
|
// update and flag set false
|
247 |
577
|
berkley
|
flag = false;
|
248 |
|
|
}
|
249 |
|
|
else if(localrev < rev)
|
250 |
|
|
{//this document needs to be updated so send an read request
|
251 |
|
|
action = "UPDATE";
|
252 |
|
|
flag = true;
|
253 |
|
|
}
|
254 |
|
|
}
|
255 |
|
|
else
|
256 |
|
|
{ //insert this document as new because it is not in the local DB
|
257 |
|
|
action = "INSERT";
|
258 |
|
|
flag = true;
|
259 |
|
|
}
|
260 |
|
|
|
261 |
1292
|
tao
|
// Close result set
|
262 |
|
|
rs.close();
|
263 |
|
|
// Close preparedstatement
|
264 |
|
|
pstmt.close();
|
265 |
|
|
|
266 |
1037
|
tao
|
// this is non-data file
|
267 |
|
|
if(flag && !dataFile)
|
268 |
577
|
berkley
|
{ //if the document needs to be updated or inserted, this is executed
|
269 |
1292
|
tao
|
u = new URL("https://" + remoteServer + "?server="+
|
270 |
1015
|
tao
|
util.getLocalReplicationServerName()+"&action=read&docid="+docid);
|
271 |
1011
|
tao
|
//System.out.println("Sending message: " + u.toString());
|
272 |
1292
|
tao
|
// Get docid content
|
273 |
577
|
berkley
|
String newxmldoc = MetacatReplication.getURLContent(u);
|
274 |
1292
|
tao
|
// If couldn't get skip it
|
275 |
1098
|
tao
|
if ( newxmldoc.indexOf("error")!= -1)
|
276 |
|
|
{
|
277 |
1100
|
tao
|
continue;
|
278 |
1098
|
tao
|
}
|
279 |
1071
|
tao
|
MetaCatUtil.debugMessage("xml documnet:", 50);
|
280 |
|
|
MetaCatUtil.debugMessage(newxmldoc, 50);
|
281 |
1292
|
tao
|
|
282 |
|
|
// Try get the docid info from remote server
|
283 |
577
|
berkley
|
DocInfoHandler dih = new DocInfoHandler();
|
284 |
|
|
XMLReader docinfoParser = initParser(dih);
|
285 |
1292
|
tao
|
URL docinfoUrl = new URL("https://" + remoteServer +
|
286 |
1015
|
tao
|
"?server="+util.getLocalReplicationServerName()+
|
287 |
1011
|
tao
|
"&action=getdocumentinfo&docid="+docid);
|
288 |
1292
|
tao
|
MetaCatUtil.debugMessage("Sending message: " +
|
289 |
|
|
docinfoUrl.toString(), 50);
|
290 |
577
|
berkley
|
String docInfoStr = MetacatReplication.getURLContent(docinfoUrl);
|
291 |
|
|
docinfoParser.parse(new InputSource(new StringReader(docInfoStr)));
|
292 |
|
|
Hashtable docinfoHash = dih.getDocInfo();
|
293 |
1292
|
tao
|
// Get home server of the docid
|
294 |
1068
|
tao
|
String docHomeServer = (String)docinfoHash.get("home_server");
|
295 |
1292
|
tao
|
|
296 |
1011
|
tao
|
//docid should include rev number too
|
297 |
|
|
String accnum=docid+util.getOption("accNumSeparator")+
|
298 |
|
|
(String)docinfoHash.get("rev");
|
299 |
625
|
berkley
|
try
|
300 |
|
|
{
|
301 |
1292
|
tao
|
// Write the document into local host
|
302 |
1387
|
tao
|
String newDocid = DocumentImplWrapper.writeReplication(dbConn,
|
303 |
577
|
berkley
|
new StringReader(newxmldoc),
|
304 |
697
|
bojilova
|
(String)docinfoHash.get("public_access"),
|
305 |
|
|
null, /* the dtd text */
|
306 |
577
|
berkley
|
action,
|
307 |
1011
|
tao
|
accnum,
|
308 |
577
|
berkley
|
(String)docinfoHash.get("user_owner"),
|
309 |
804
|
bojilova
|
null, /* null for groups[] */
|
310 |
1068
|
tao
|
docHomeServer,
|
311 |
1292
|
tao
|
remoteServer);
|
312 |
1217
|
tao
|
//increase usage
|
313 |
|
|
dbConn.increaseUsageCount(1);
|
314 |
625
|
berkley
|
MetacatReplication.replLog("wrote doc " + docid + " from " +
|
315 |
1292
|
tao
|
remoteServer);
|
316 |
1011
|
tao
|
/*System.out.println("wrote doc " + docid + " from " +
|
317 |
|
|
docServer);*/
|
318 |
625
|
berkley
|
}
|
319 |
|
|
catch(Exception e)
|
320 |
|
|
{
|
321 |
675
|
berkley
|
System.out.println("error writing document in " +
|
322 |
|
|
"ReplicationHandler.update: " + docid +
|
323 |
|
|
": " + e.getMessage());
|
324 |
625
|
berkley
|
}
|
325 |
1037
|
tao
|
}//if for non-data file
|
326 |
|
|
|
327 |
1292
|
tao
|
// this is for data file
|
328 |
|
|
if(flag && dataFile)
|
329 |
1037
|
tao
|
{
|
330 |
|
|
//if the document needs to be updated or inserted, this is executed
|
331 |
1292
|
tao
|
|
332 |
|
|
// Try get docid info from remote server
|
333 |
1037
|
tao
|
DocInfoHandler dih = new DocInfoHandler();
|
334 |
|
|
XMLReader docinfoParser = initParser(dih);
|
335 |
1292
|
tao
|
URL docinfoUrl = new URL("https://" + remoteServer +
|
336 |
1037
|
tao
|
"?server="+util.getLocalReplicationServerName()+
|
337 |
|
|
"&action=getdocumentinfo&docid="+docid);
|
338 |
1292
|
tao
|
|
339 |
1037
|
tao
|
String docInfoStr = MetacatReplication.getURLContent(docinfoUrl);
|
340 |
|
|
docinfoParser.parse(new InputSource(new StringReader(docInfoStr)));
|
341 |
|
|
Hashtable docinfoHash = dih.getDocInfo();
|
342 |
1292
|
tao
|
// Get doicd owner
|
343 |
1037
|
tao
|
String user = (String)docinfoHash.get("user_owner");
|
344 |
1292
|
tao
|
// Get docid name (such as acl or dataset)
|
345 |
1037
|
tao
|
String docName = (String)docinfoHash.get("docname");
|
346 |
1292
|
tao
|
// Get doc type (eml public id)
|
347 |
1037
|
tao
|
String docType = (String)docinfoHash.get("doctype");
|
348 |
1292
|
tao
|
// Get docid home sever. it might be different to remoteserver
|
349 |
|
|
// becuause of hub feature
|
350 |
1066
|
tao
|
String docHomeServer = (String)docinfoHash.get("home_server");
|
351 |
1292
|
tao
|
|
352 |
1037
|
tao
|
//System.out.println("updating doc: " + docid +" action: "+ action);
|
353 |
|
|
//docid should include rev number too
|
354 |
|
|
String accnum=docid+util.getOption("accNumSeparator")+
|
355 |
|
|
(String)docinfoHash.get("rev");
|
356 |
|
|
String datafilePath = util.getOption("datafilepath");
|
357 |
1292
|
tao
|
// Get data file content
|
358 |
|
|
u = new URL("https://" + remoteServer + "?server="+
|
359 |
1037
|
tao
|
util.getLocalReplicationServerName()+
|
360 |
|
|
"&action=readdata&docid="+accnum);
|
361 |
1292
|
tao
|
|
362 |
1037
|
tao
|
try
|
363 |
|
|
{
|
364 |
|
|
//register data file into xml_documents table and wite data file
|
365 |
|
|
//into file system
|
366 |
1098
|
tao
|
if (u.openStream() != null)
|
367 |
|
|
{
|
368 |
1292
|
tao
|
DocumentImpl.writeDataFileInReplication(u.openStream(),
|
369 |
|
|
datafilePath,
|
370 |
|
|
docName,docType,
|
371 |
|
|
accnum, user,
|
372 |
|
|
docHomeServer,
|
373 |
|
|
remoteServer);
|
374 |
1037
|
tao
|
|
375 |
1292
|
tao
|
MetacatReplication.replLog("wrote doc " + docid + " from " +
|
376 |
|
|
remoteServer);
|
377 |
|
|
}//if
|
378 |
1098
|
tao
|
else
|
379 |
|
|
{
|
380 |
1292
|
tao
|
// If get null, skip it
|
381 |
1100
|
tao
|
continue;
|
382 |
1292
|
tao
|
}//else
|
383 |
|
|
|
384 |
|
|
}//try
|
385 |
1037
|
tao
|
catch(Exception e)
|
386 |
|
|
{
|
387 |
|
|
System.out.println("error writing document in " +
|
388 |
|
|
"ReplicationHandler.update: " + docid +
|
389 |
|
|
": " + e.getMessage());
|
390 |
1292
|
tao
|
}//catch
|
391 |
1037
|
tao
|
}//for datafile
|
392 |
|
|
}//for update docs
|
393 |
577
|
berkley
|
|
394 |
1037
|
tao
|
//handle deleted docs
|
395 |
577
|
berkley
|
for(int k=0; k<d.size(); k++)
|
396 |
|
|
{ //delete the deleted documents;
|
397 |
|
|
Vector w = new Vector((Vector)d.elementAt(k));
|
398 |
|
|
String docid = (String)w.elementAt(0);
|
399 |
1217
|
tao
|
if(!alreadyDeleted(docid))
|
400 |
579
|
berkley
|
{
|
401 |
1037
|
tao
|
|
402 |
|
|
//because delete method docid should have rev number
|
403 |
|
|
//so we just add one for it. This rev number is no sence.
|
404 |
|
|
String accnum=docid+util.getOption("accNumSeparator")+"1";
|
405 |
|
|
//System.out.println("accnum: "+accnum);
|
406 |
1217
|
tao
|
DocumentImpl.delete(accnum, null, null);
|
407 |
584
|
berkley
|
MetacatReplication.replLog("doc " + docid + " deleted");
|
408 |
579
|
berkley
|
}
|
409 |
1037
|
tao
|
}//for delete docs
|
410 |
1292
|
tao
|
}//for
|
411 |
|
|
|
412 |
|
|
//updated last_checked
|
413 |
|
|
for (int i=0;i<serverList.size(); i++)
|
414 |
|
|
{
|
415 |
|
|
// Get ReplicationServer object from server list
|
416 |
|
|
replServer = serverList.serverAt(i);
|
417 |
|
|
// Get server name from ReplicationServer object
|
418 |
|
|
server = replServer.getServerName();
|
419 |
|
|
// Get time from remote server
|
420 |
1011
|
tao
|
URL dateurl = new URL("https://" + server + "?server="+
|
421 |
1015
|
tao
|
util.getLocalReplicationServerName()+"&action=gettime");
|
422 |
577
|
berkley
|
String datexml = MetacatReplication.getURLContent(dateurl);
|
423 |
1071
|
tao
|
MetaCatUtil.debugMessage("datexml: "+datexml, 40);
|
424 |
|
|
if (datexml!=null && !datexml.equals(""))
|
425 |
|
|
{
|
426 |
|
|
String datestr = datexml.substring(11, datexml.indexOf('<', 11));
|
427 |
|
|
StringBuffer sql = new StringBuffer();
|
428 |
|
|
sql.append("update xml_replication set last_checked = to_date('");
|
429 |
|
|
sql.append(datestr).append("', 'YY-MM-DD HH24:MI:SS') where ");
|
430 |
|
|
sql.append("server like '").append(server).append("'");
|
431 |
|
|
//System.out.println("sql: " + sql.toString());
|
432 |
|
|
pstmt.close();
|
433 |
1217
|
tao
|
pstmt = dbConn.prepareStatement(sql.toString());
|
434 |
|
|
//increase usage count
|
435 |
|
|
dbConn.increaseUsageCount(1);
|
436 |
1071
|
tao
|
pstmt.executeUpdate();
|
437 |
1217
|
tao
|
dbConn.commit();
|
438 |
1292
|
tao
|
MetaCatUtil.debugMessage("last_checked updated to "+datestr+" on "
|
439 |
|
|
+ server, 45);
|
440 |
|
|
}//if
|
441 |
1037
|
tao
|
}//for
|
442 |
|
|
}//try
|
443 |
577
|
berkley
|
catch(Exception e)
|
444 |
|
|
{
|
445 |
1011
|
tao
|
/*System.out.println("error in ReplicationHandler.update: " +
|
446 |
|
|
e.getMessage());*/
|
447 |
577
|
berkley
|
e.printStackTrace(System.out);
|
448 |
|
|
}
|
449 |
667
|
berkley
|
finally
|
450 |
|
|
{
|
451 |
|
|
try
|
452 |
|
|
{
|
453 |
1292
|
tao
|
|
454 |
|
|
pstmt.close();
|
455 |
|
|
|
456 |
1217
|
tao
|
}//try
|
457 |
|
|
catch(Exception ee)
|
458 |
|
|
{
|
459 |
|
|
MetaCatUtil.debugMessage("Error in ReplicationHandler.update to close"+
|
460 |
|
|
" pstmt: "+ee.getMessage(), 30);
|
461 |
|
|
}//catch
|
462 |
|
|
finally
|
463 |
|
|
{
|
464 |
|
|
DBConnectionPool.returnDBConnection(dbConn, serialNumber);
|
465 |
|
|
}//finally
|
466 |
1037
|
tao
|
}//finally
|
467 |
|
|
}//update
|
468 |
577
|
berkley
|
|
469 |
|
|
/**
|
470 |
590
|
berkley
|
* updates xml_catalog with entries from other servers.
|
471 |
|
|
*/
|
472 |
1292
|
tao
|
private void updateCatalog()
|
473 |
590
|
berkley
|
{
|
474 |
1292
|
tao
|
// DConnection
|
475 |
1217
|
tao
|
DBConnection dbConn = null;
|
476 |
1292
|
tao
|
// DBConnection checkout serial number
|
477 |
1217
|
tao
|
int serialNumber = -1;
|
478 |
1292
|
tao
|
// ReplicationServer object in server list
|
479 |
|
|
ReplicationServer replServer = null;
|
480 |
1217
|
tao
|
PreparedStatement pstmt = null;
|
481 |
590
|
berkley
|
try
|
482 |
|
|
{
|
483 |
1292
|
tao
|
|
484 |
1217
|
tao
|
dbConn=DBConnectionPool.
|
485 |
|
|
getDBConnection("ReplicationHandler.updateCatalog");
|
486 |
|
|
serialNumber=dbConn.getCheckOutSerialNumber();
|
487 |
590
|
berkley
|
String server;
|
488 |
1292
|
tao
|
|
489 |
|
|
// Go through each ReplicationServer object in sererlist
|
490 |
|
|
for (int j=0; j<serverList.size(); j++)
|
491 |
|
|
{
|
492 |
|
|
// Get ReplicationServer object from server list
|
493 |
|
|
replServer = serverList.serverAt(j);
|
494 |
|
|
// Get server name from the ReplicationServer object
|
495 |
|
|
server = replServer.getServerName();
|
496 |
|
|
// Try to get catalog
|
497 |
1011
|
tao
|
URL u = new URL("https://" + server + "?server="+
|
498 |
1015
|
tao
|
util.getLocalReplicationServerName()+"&action=getcatalog");
|
499 |
1292
|
tao
|
MetaCatUtil.debugMessage("sending message " + u.toString(), 50);
|
500 |
590
|
berkley
|
String catxml = MetacatReplication.getURLContent(u);
|
501 |
1292
|
tao
|
|
502 |
|
|
// Make sure there are not error, no empty string
|
503 |
|
|
if (catxml.indexOf("error")!=-1 || catxml==null||catxml.equals(""))
|
504 |
|
|
{
|
505 |
|
|
continue;
|
506 |
|
|
}
|
507 |
|
|
MetaCatUtil.debugMessage("catxml: " + catxml, 50);
|
508 |
590
|
berkley
|
CatalogMessageHandler cmh = new CatalogMessageHandler();
|
509 |
|
|
XMLReader catparser = initParser(cmh);
|
510 |
|
|
catparser.parse(new InputSource(new StringReader(catxml)));
|
511 |
|
|
//parse the returned catalog xml and put it into a vector
|
512 |
|
|
Vector remoteCatalog = cmh.getCatalogVect();
|
513 |
|
|
|
514 |
1292
|
tao
|
// Makse sure remoteCatalog is not empty
|
515 |
|
|
if (remoteCatalog.isEmpty())
|
516 |
|
|
{
|
517 |
|
|
continue;
|
518 |
|
|
}
|
519 |
|
|
|
520 |
590
|
berkley
|
String localcatxml = MetacatReplication.getCatalogXML();
|
521 |
1292
|
tao
|
|
522 |
|
|
// Make sure local catalog is no empty
|
523 |
|
|
if (localcatxml==null||localcatxml.equals(""))
|
524 |
|
|
{
|
525 |
|
|
continue;
|
526 |
|
|
}
|
527 |
|
|
|
528 |
590
|
berkley
|
cmh = new CatalogMessageHandler();
|
529 |
|
|
catparser = initParser(cmh);
|
530 |
|
|
catparser.parse(new InputSource(new StringReader(localcatxml)));
|
531 |
|
|
Vector localCatalog = cmh.getCatalogVect();
|
532 |
|
|
|
533 |
|
|
//now we have the catalog from the remote server and this local server
|
534 |
|
|
//we now need to compare the two and merge the differences.
|
535 |
|
|
//the comparison is base on the public_id fields which is the 4th
|
536 |
|
|
//entry in each row vector.
|
537 |
|
|
Vector publicId = new Vector();
|
538 |
|
|
for(int i=0; i<localCatalog.size(); i++)
|
539 |
|
|
{
|
540 |
|
|
Vector v = new Vector((Vector)localCatalog.elementAt(i));
|
541 |
1292
|
tao
|
MetaCatUtil.debugMessage("v1: " + v.toString(), 50);
|
542 |
590
|
berkley
|
publicId.add(new String((String)v.elementAt(3)));
|
543 |
595
|
berkley
|
//System.out.println("adding " + (String)v.elementAt(3));
|
544 |
590
|
berkley
|
}
|
545 |
|
|
|
546 |
|
|
for(int i=0; i<remoteCatalog.size(); i++)
|
547 |
|
|
{
|
548 |
|
|
Vector v = (Vector)remoteCatalog.elementAt(i);
|
549 |
595
|
berkley
|
//System.out.println("v2: " + v.toString());
|
550 |
590
|
berkley
|
//System.out.println("i: " + i);
|
551 |
|
|
//System.out.println("remoteCatalog.size(): " + remoteCatalog.size());
|
552 |
595
|
berkley
|
//System.out.println("publicID: " + publicId.toString());
|
553 |
1292
|
tao
|
MetaCatUtil.debugMessage
|
554 |
|
|
("v.elementAt(3): " + (String)v.elementAt(3), 50);
|
555 |
590
|
berkley
|
if(!publicId.contains(v.elementAt(3)))
|
556 |
|
|
{ //so we don't have this public id in our local table so we need to
|
557 |
|
|
//add it.
|
558 |
595
|
berkley
|
//System.out.println("in if");
|
559 |
590
|
berkley
|
StringBuffer sql = new StringBuffer();
|
560 |
|
|
sql.append("insert into xml_catalog (entry_type, source_doctype, ");
|
561 |
|
|
sql.append("target_doctype, public_id, system_id) values (?,?,?,");
|
562 |
|
|
sql.append("?,?)");
|
563 |
595
|
berkley
|
//System.out.println("sql: " + sql.toString());
|
564 |
1217
|
tao
|
pstmt = dbConn.prepareStatement(sql.toString());
|
565 |
|
|
//increase usage count 1
|
566 |
|
|
dbConn.increaseUsageCount(1);
|
567 |
590
|
berkley
|
pstmt.setString(1, (String)v.elementAt(0));
|
568 |
|
|
pstmt.setString(2, (String)v.elementAt(1));
|
569 |
|
|
pstmt.setString(3, (String)v.elementAt(2));
|
570 |
|
|
pstmt.setString(4, (String)v.elementAt(3));
|
571 |
|
|
pstmt.setString(5, (String)v.elementAt(4));
|
572 |
|
|
pstmt.execute();
|
573 |
667
|
berkley
|
pstmt.close();
|
574 |
590
|
berkley
|
}
|
575 |
|
|
}
|
576 |
|
|
}
|
577 |
1292
|
tao
|
|
578 |
590
|
berkley
|
}
|
579 |
|
|
catch(Exception e)
|
580 |
|
|
{
|
581 |
675
|
berkley
|
System.out.println("error in ReplicationHandler.updateCatalog: " +
|
582 |
|
|
e.getMessage());
|
583 |
590
|
berkley
|
e.printStackTrace(System.out);
|
584 |
1217
|
tao
|
}//catch
|
585 |
|
|
finally
|
586 |
|
|
{
|
587 |
1292
|
tao
|
DBConnectionPool.returnDBConnection(dbConn, serialNumber);
|
588 |
1217
|
tao
|
}//finall
|
589 |
590
|
berkley
|
}
|
590 |
|
|
|
591 |
|
|
/**
|
592 |
579
|
berkley
|
* Method that returns true if docid has already been "deleted" from metacat.
|
593 |
582
|
berkley
|
* This method really implements a truth table for deleted documents
|
594 |
590
|
berkley
|
* The table is (a docid in one of the tables is represented by the X):
|
595 |
582
|
berkley
|
* xml_docs xml_revs deleted?
|
596 |
|
|
* ------------------------------------
|
597 |
|
|
* X X FALSE
|
598 |
|
|
* X _ FALSE
|
599 |
|
|
* _ X TRUE
|
600 |
|
|
* _ _ TRUE
|
601 |
579
|
berkley
|
*/
|
602 |
1217
|
tao
|
private static boolean alreadyDeleted(String docid)
|
603 |
579
|
berkley
|
{
|
604 |
1217
|
tao
|
DBConnection dbConn = null;
|
605 |
|
|
int serialNumber = -1;
|
606 |
|
|
PreparedStatement pstmt = null;
|
607 |
579
|
berkley
|
try
|
608 |
|
|
{
|
609 |
1217
|
tao
|
dbConn=DBConnectionPool.
|
610 |
|
|
getDBConnection("ReplicationHandler.alreadyDeleted");
|
611 |
|
|
serialNumber=dbConn.getCheckOutSerialNumber();
|
612 |
582
|
berkley
|
boolean xml_docs = false;
|
613 |
|
|
boolean xml_revs = false;
|
614 |
|
|
|
615 |
579
|
berkley
|
StringBuffer sb = new StringBuffer();
|
616 |
582
|
berkley
|
sb.append("select docid from xml_revisions where docid like '");
|
617 |
579
|
berkley
|
sb.append(docid).append("'");
|
618 |
1217
|
tao
|
pstmt = dbConn.prepareStatement(sb.toString());
|
619 |
579
|
berkley
|
pstmt.execute();
|
620 |
|
|
ResultSet rs = pstmt.getResultSet();
|
621 |
|
|
boolean tablehasrows = rs.next();
|
622 |
|
|
if(tablehasrows)
|
623 |
|
|
{
|
624 |
582
|
berkley
|
xml_revs = true;
|
625 |
|
|
}
|
626 |
|
|
|
627 |
|
|
sb = new StringBuffer();
|
628 |
|
|
sb.append("select docid from xml_documents where docid like '");
|
629 |
|
|
sb.append(docid).append("'");
|
630 |
667
|
berkley
|
pstmt.close();
|
631 |
1217
|
tao
|
pstmt = dbConn.prepareStatement(sb.toString());
|
632 |
|
|
//increase usage count
|
633 |
|
|
dbConn.increaseUsageCount(1);
|
634 |
582
|
berkley
|
pstmt.execute();
|
635 |
|
|
rs = pstmt.getResultSet();
|
636 |
|
|
tablehasrows = rs.next();
|
637 |
667
|
berkley
|
pstmt.close();
|
638 |
582
|
berkley
|
if(tablehasrows)
|
639 |
|
|
{
|
640 |
|
|
xml_docs = true;
|
641 |
|
|
}
|
642 |
|
|
|
643 |
|
|
if(xml_docs && xml_revs)
|
644 |
|
|
{
|
645 |
|
|
return false;
|
646 |
|
|
}
|
647 |
|
|
else if(xml_docs && !xml_revs)
|
648 |
|
|
{
|
649 |
|
|
return false;
|
650 |
|
|
}
|
651 |
|
|
else if(!xml_docs && xml_revs)
|
652 |
|
|
{
|
653 |
579
|
berkley
|
return true;
|
654 |
|
|
}
|
655 |
582
|
berkley
|
else if(!xml_docs && !xml_revs)
|
656 |
|
|
{
|
657 |
|
|
return true;
|
658 |
|
|
}
|
659 |
579
|
berkley
|
}
|
660 |
|
|
catch(Exception e)
|
661 |
|
|
{
|
662 |
675
|
berkley
|
System.out.println("error in ReplicationHandler.alreadyDeleted: " +
|
663 |
|
|
e.getMessage());
|
664 |
579
|
berkley
|
e.printStackTrace(System.out);
|
665 |
|
|
}
|
666 |
667
|
berkley
|
finally
|
667 |
|
|
{
|
668 |
1217
|
tao
|
try
|
669 |
|
|
{
|
670 |
|
|
pstmt.close();
|
671 |
|
|
}//try
|
672 |
|
|
catch (SQLException ee)
|
673 |
|
|
{
|
674 |
|
|
MetaCatUtil.debugMessage("Error in replicationHandler.alreadyDeleted "+
|
675 |
|
|
"to close pstmt: "+ee.getMessage(), 30);
|
676 |
|
|
}//catch
|
677 |
|
|
finally
|
678 |
|
|
{
|
679 |
|
|
DBConnectionPool.returnDBConnection(dbConn, serialNumber);
|
680 |
|
|
}//finally
|
681 |
|
|
}//finally
|
682 |
579
|
berkley
|
return false;
|
683 |
|
|
}
|
684 |
533
|
berkley
|
|
685 |
|
|
|
686 |
|
|
/**
|
687 |
574
|
berkley
|
* Method to initialize the message parser
|
688 |
|
|
*/
|
689 |
|
|
public static XMLReader initParser(DefaultHandler dh)
|
690 |
|
|
throws Exception
|
691 |
|
|
{
|
692 |
|
|
XMLReader parser = null;
|
693 |
|
|
|
694 |
|
|
try {
|
695 |
|
|
ContentHandler chandler = dh;
|
696 |
|
|
|
697 |
|
|
// Get an instance of the parser
|
698 |
|
|
MetaCatUtil util = new MetaCatUtil();
|
699 |
|
|
String parserName = util.getOption("saxparser");
|
700 |
|
|
parser = XMLReaderFactory.createXMLReader(parserName);
|
701 |
|
|
|
702 |
|
|
// Turn off validation
|
703 |
|
|
parser.setFeature("http://xml.org/sax/features/validation", false);
|
704 |
|
|
|
705 |
|
|
parser.setContentHandler((ContentHandler)chandler);
|
706 |
|
|
parser.setErrorHandler((ErrorHandler)chandler);
|
707 |
|
|
|
708 |
|
|
} catch (Exception e) {
|
709 |
|
|
throw e;
|
710 |
|
|
}
|
711 |
|
|
|
712 |
|
|
return parser;
|
713 |
|
|
}
|
714 |
1011
|
tao
|
|
715 |
1015
|
tao
|
|
716 |
522
|
berkley
|
}
|