| 1 |
581
|
berkley
|
/**
|
| 2 |
|
|
* '$RCSfile$'
|
| 3 |
2298
|
tao
|
* 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 |
669
|
jones
|
* with a certain docid.
|
| 8 |
581
|
berkley
|
* Copyright: 2000 Regents of the University of California and the
|
| 9 |
|
|
* National Center for Ecological Analysis and Synthesis
|
| 10 |
669
|
jones
|
* Authors: Chad Berkley
|
| 11 |
|
|
* Release: @release@
|
| 12 |
581
|
berkley
|
*
|
| 13 |
669
|
jones
|
* '$Author$'
|
| 14 |
|
|
* '$Date$'
|
| 15 |
|
|
* '$Revision$'
|
| 16 |
|
|
*
|
| 17 |
|
|
* This program is free software; you can redistribute it and/or modify
|
| 18 |
|
|
* it under the terms of the GNU General Public License as published by
|
| 19 |
|
|
* the Free Software Foundation; either version 2 of the License, or
|
| 20 |
|
|
* (at your option) any later version.
|
| 21 |
|
|
*
|
| 22 |
|
|
* This program is distributed in the hope that it will be useful,
|
| 23 |
|
|
* but WITHOUT ANY WARRANTY; without even the implied warranty of
|
| 24 |
|
|
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
| 25 |
|
|
* GNU General Public License for more details.
|
| 26 |
|
|
*
|
| 27 |
|
|
* You should have received a copy of the GNU General Public License
|
| 28 |
|
|
* along with this program; if not, write to the Free Software
|
| 29 |
|
|
* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
|
| 30 |
581
|
berkley
|
*/
|
| 31 |
2298
|
tao
|
|
| 32 |
581
|
berkley
|
package edu.ucsb.nceas.metacat;
|
| 33 |
|
|
|
| 34 |
|
|
import java.util.*;
|
| 35 |
|
|
import java.io.*;
|
| 36 |
|
|
import java.sql.*;
|
| 37 |
|
|
import java.net.*;
|
| 38 |
|
|
import java.lang.*;
|
| 39 |
|
|
import java.text.*;
|
| 40 |
|
|
|
| 41 |
669
|
jones
|
/**
|
| 42 |
2298
|
tao
|
* A class to asyncronously force the replication of each server
|
| 43 |
|
|
* that has an entry in the xml_replication table. When run,
|
| 44 |
|
|
* this thread communicates with each server in the list and
|
| 45 |
|
|
* solicites a read of an updated or newly inserted document
|
| 46 |
669
|
jones
|
* with a certain docid.
|
| 47 |
|
|
*/
|
| 48 |
581
|
berkley
|
public class ForceReplicationHandler implements Runnable
|
| 49 |
|
|
{
|
| 50 |
|
|
private Thread btThread;
|
| 51 |
|
|
private MetaCatUtil util = new MetaCatUtil();
|
| 52 |
|
|
private String docid;
|
| 53 |
|
|
private String action;
|
| 54 |
1022
|
tao
|
private boolean xmlDocument;
|
| 55 |
581
|
berkley
|
private boolean dbactionFlag = true;
|
| 56 |
2298
|
tao
|
private ReplicationServerList serverLists = null;//Serverlist
|
| 57 |
1292
|
tao
|
private int homeServerCode = 0; // home server code for the docid
|
| 58 |
2298
|
tao
|
// When a metacat A got forcereplication
|
| 59 |
1292
|
tao
|
// notification from B, then A will update its record. And A will notification
|
| 60 |
|
|
// other metacat in its serverlist to update this docid if A is a hub. But we
|
| 61 |
|
|
// don't want A to notify B again. B is nofitification of A
|
| 62 |
|
|
private String notificationServer = null;
|
| 63 |
2298
|
tao
|
|
| 64 |
|
|
//constant
|
| 65 |
|
|
public static final String DELETE = "delete";
|
| 66 |
|
|
|
| 67 |
|
|
|
| 68 |
|
|
|
| 69 |
581
|
berkley
|
/**
|
| 70 |
1292
|
tao
|
* Constructor of ForceReplicationHandler
|
| 71 |
581
|
berkley
|
* @param docid the docid to force replicate
|
| 72 |
2298
|
tao
|
* @param the action that is being performed on the document (either
|
| 73 |
581
|
berkley
|
* INSERT or UPDATE)
|
| 74 |
1292
|
tao
|
* @param xml the docid is a xml document or not (data file)
|
| 75 |
2298
|
tao
|
* @param notificationServer, when a metacat A got forcereplication
|
| 76 |
1292
|
tao
|
* notification from B, then A will update its record. And A will notification
|
| 77 |
|
|
* other metacat in its serverlist to update this docid if A is a hub. But we
|
| 78 |
|
|
* don't want A to notify B again. B is nofitification of A.
|
| 79 |
581
|
berkley
|
*/
|
| 80 |
2298
|
tao
|
public ForceReplicationHandler(String docid, String action, boolean xml,
|
| 81 |
1292
|
tao
|
String myNotificationServer)
|
| 82 |
581
|
berkley
|
{
|
| 83 |
|
|
this.docid = docid;
|
| 84 |
|
|
this.action = action;
|
| 85 |
1022
|
tao
|
this.xmlDocument =xml;
|
| 86 |
1292
|
tao
|
// Build a severLists from xml_replication table
|
| 87 |
|
|
this.serverLists = new ReplicationServerList();
|
| 88 |
|
|
// Get sever code for this docid
|
| 89 |
|
|
try
|
| 90 |
|
|
{
|
| 91 |
|
|
this.homeServerCode = MetacatReplication.getHomeServerCodeForDocId(docid);
|
| 92 |
|
|
}//try
|
| 93 |
|
|
catch (Exception e)
|
| 94 |
|
|
{
|
| 95 |
|
|
MetaCatUtil.debugMessage("Error in ForceReplicationHandle(): "
|
| 96 |
|
|
+e.getMessage(), 30);
|
| 97 |
|
|
}//catch
|
| 98 |
|
|
// Get the notification server
|
| 99 |
|
|
this.notificationServer = myNotificationServer;
|
| 100 |
2298
|
tao
|
|
| 101 |
581
|
berkley
|
if(this.action.equals(""))
|
| 102 |
|
|
{
|
| 103 |
|
|
dbactionFlag = false;
|
| 104 |
|
|
}
|
| 105 |
2298
|
tao
|
|
| 106 |
581
|
berkley
|
btThread = new Thread(this);
|
| 107 |
|
|
btThread.setPriority(Thread.MIN_PRIORITY);
|
| 108 |
|
|
btThread.start();
|
| 109 |
|
|
}
|
| 110 |
2298
|
tao
|
|
| 111 |
581
|
berkley
|
/**
|
| 112 |
|
|
* Use this constructor when the action is implied.
|
| 113 |
|
|
*/
|
| 114 |
2298
|
tao
|
public ForceReplicationHandler(String docid, boolean xml,
|
| 115 |
1292
|
tao
|
String myNotificationServer )
|
| 116 |
581
|
berkley
|
{
|
| 117 |
|
|
this.docid = docid;
|
| 118 |
1022
|
tao
|
this.xmlDocument = xml;
|
| 119 |
581
|
berkley
|
dbactionFlag = false;
|
| 120 |
1292
|
tao
|
// Build a severLists from xml_replication table
|
| 121 |
|
|
this.serverLists = new ReplicationServerList();
|
| 122 |
|
|
// Get home server code for this doicd
|
| 123 |
|
|
try
|
| 124 |
|
|
{
|
| 125 |
|
|
this.homeServerCode = MetacatReplication.getHomeServerCodeForDocId(docid);
|
| 126 |
|
|
}
|
| 127 |
|
|
catch (Exception e)
|
| 128 |
|
|
{
|
| 129 |
|
|
MetaCatUtil.debugMessage("Error in ForceReplicationHandle(): "
|
| 130 |
|
|
+e.getMessage(), 30);
|
| 131 |
|
|
}//catch
|
| 132 |
|
|
// Get notification server
|
| 133 |
|
|
this.notificationServer = myNotificationServer;
|
| 134 |
581
|
berkley
|
btThread = new Thread(this);
|
| 135 |
|
|
btThread.setPriority(Thread.MIN_PRIORITY);
|
| 136 |
|
|
btThread.start();
|
| 137 |
|
|
}
|
| 138 |
2298
|
tao
|
|
| 139 |
1292
|
tao
|
/**
|
| 140 |
2298
|
tao
|
* Method to send force replication command to other server to get
|
| 141 |
1292
|
tao
|
* a new or updated docid
|
| 142 |
|
|
*/
|
| 143 |
581
|
berkley
|
public void run()
|
| 144 |
|
|
{
|
| 145 |
2298
|
tao
|
|
| 146 |
581
|
berkley
|
try
|
| 147 |
|
|
{
|
| 148 |
1292
|
tao
|
// URL for notifcation
|
| 149 |
1022
|
tao
|
URL comeAndGetIt = null;
|
| 150 |
1030
|
tao
|
// If no server in xml_replication table, metacat don't need do anything
|
| 151 |
1292
|
tao
|
if (serverLists.isEmpty())
|
| 152 |
1030
|
tao
|
{
|
| 153 |
|
|
return;
|
| 154 |
|
|
}
|
| 155 |
2298
|
tao
|
|
| 156 |
|
|
// Thread seelping for some seconds to make sure the document was insert
|
| 157 |
1292
|
tao
|
// into the database before we send force replication request
|
| 158 |
|
|
int sleepTime = Integer.parseInt
|
| 159 |
|
|
(MetaCatUtil.getOption("forcereplicationwaitingtime"));
|
| 160 |
|
|
Thread.sleep(sleepTime);
|
| 161 |
|
|
MetaCatUtil.debugMessage("notification server:"+notificationServer, 34);
|
| 162 |
|
|
// Check every server in the serverlists
|
| 163 |
|
|
for (int i=0; i<serverLists.size(); i++)
|
| 164 |
581
|
berkley
|
{
|
| 165 |
1292
|
tao
|
//Set comeAndGetIt null
|
| 166 |
|
|
comeAndGetIt = null;
|
| 167 |
|
|
// Get ReplicationServer object in index i
|
| 168 |
|
|
ReplicationServer replicationServer = serverLists.serverAt(i);
|
| 169 |
|
|
// Get this ReplicationServer 's name
|
| 170 |
|
|
String server = replicationServer.getServerName();
|
| 171 |
2298
|
tao
|
|
| 172 |
|
|
// If the server is the notification server, we don't notify it back
|
| 173 |
1292
|
tao
|
// again, if server is null we don't replication it
|
| 174 |
|
|
if (server!=null && !server.equals(notificationServer))
|
| 175 |
581
|
berkley
|
{
|
| 176 |
2298
|
tao
|
|
| 177 |
1292
|
tao
|
if(dbactionFlag)
|
| 178 |
|
|
{
|
| 179 |
|
|
// xml documents and server can replicate xml doucment
|
| 180 |
|
|
if (xmlDocument && replicationServer.getReplication())
|
| 181 |
1022
|
tao
|
{
|
| 182 |
1292
|
tao
|
// If this docid's homeserver is localhost, replicate it
|
| 183 |
|
|
if (homeServerCode==1)
|
| 184 |
|
|
{
|
| 185 |
2298
|
tao
|
MetacatReplication.replLog("force xml replicating to "
|
| 186 |
1292
|
tao
|
+ server);
|
| 187 |
2298
|
tao
|
comeAndGetIt = new URL("https://" + server +
|
| 188 |
|
|
"?action=forcereplicate&server=" +
|
| 189 |
2579
|
tao
|
util.getLocalReplicationServerName()+
|
| 190 |
581
|
berkley
|
"&docid=" + docid + "&dbaction=" +
|
| 191 |
|
|
action);
|
| 192 |
2298
|
tao
|
//over write the url for delete
|
| 193 |
|
|
if (action != null && action.equals(DELETE))
|
| 194 |
|
|
{
|
| 195 |
|
|
comeAndGetIt = new URL("https://" + server + "?action=" +
|
| 196 |
|
|
MetacatReplication.FORCEREPLICATEDELETE +
|
| 197 |
2579
|
tao
|
"&docid=" + docid +"&server="+ util.getLocalReplicationServerName());
|
| 198 |
2298
|
tao
|
|
| 199 |
|
|
}
|
| 200 |
1292
|
tao
|
}//if servercode==1
|
| 201 |
|
|
else if (replicationServer.getHub()||
|
| 202 |
|
|
server.equals(MetacatReplication.
|
| 203 |
|
|
getServerNameForServerCode(homeServerCode)))
|
| 204 |
|
|
{
|
| 205 |
|
|
// If the docid's home server is not local host, but local host
|
| 206 |
|
|
// is a hub of this server, replicate the docid too.
|
| 207 |
|
|
// If the server is homeserver of the docid, replication it too
|
| 208 |
2298
|
tao
|
MetacatReplication.replLog("force xml replicating to "
|
| 209 |
1292
|
tao
|
+ server);
|
| 210 |
2298
|
tao
|
comeAndGetIt = new URL("https://" + server +
|
| 211 |
|
|
"?action=forcereplicate&server=" +
|
| 212 |
2579
|
tao
|
util.getLocalReplicationServerName() +
|
| 213 |
1292
|
tao
|
"&docid=" + docid + "&dbaction=" +
|
| 214 |
|
|
action);
|
| 215 |
2298
|
tao
|
//over write the url for delete
|
| 216 |
|
|
if (action != null && action.equals(DELETE))
|
| 217 |
|
|
{
|
| 218 |
|
|
comeAndGetIt = new URL("https://" + server + "?action=" +
|
| 219 |
|
|
MetacatReplication.FORCEREPLICATEDELETE +
|
| 220 |
2579
|
tao
|
"&docid=" + docid+"&server="+ util.getLocalReplicationServerName());
|
| 221 |
2298
|
tao
|
|
| 222 |
|
|
}
|
| 223 |
1292
|
tao
|
}//else
|
| 224 |
2298
|
tao
|
|
| 225 |
1292
|
tao
|
}//if xmlDocument
|
| 226 |
1022
|
tao
|
//It is data file and configured to handle data replication
|
| 227 |
1292
|
tao
|
else if (replicationServer.getDataReplication())
|
| 228 |
1022
|
tao
|
{
|
| 229 |
1292
|
tao
|
// If the docid's home server is local host, replicate the docid
|
| 230 |
|
|
if (homeServerCode==1)
|
| 231 |
|
|
{
|
| 232 |
2298
|
tao
|
MetacatReplication.replLog("force data replicating to "
|
| 233 |
1292
|
tao
|
+ server);
|
| 234 |
2298
|
tao
|
comeAndGetIt = new URL("https://" + server +
|
| 235 |
|
|
"?action=forcereplicatedatafile&server=" +
|
| 236 |
2579
|
tao
|
util.getLocalReplicationServerName() +
|
| 237 |
1022
|
tao
|
"&docid=" + docid + "&dbaction=" +
|
| 238 |
|
|
action);
|
| 239 |
2298
|
tao
|
//over write the url for delete
|
| 240 |
|
|
if (action != null && action.equals(DELETE))
|
| 241 |
|
|
{
|
| 242 |
|
|
comeAndGetIt = new URL("https://" + server + "?action=" +
|
| 243 |
|
|
MetacatReplication.FORCEREPLICATEDELETE +
|
| 244 |
2579
|
tao
|
"&docid=" + docid +"&server="+ util.getLocalReplicationServerName());
|
| 245 |
2298
|
tao
|
|
| 246 |
|
|
}
|
| 247 |
|
|
|
| 248 |
1292
|
tao
|
}//if serverCode==1
|
| 249 |
|
|
else if (replicationServer.getHub()||
|
| 250 |
|
|
server.equals(MetacatReplication.
|
| 251 |
|
|
getServerNameForServerCode(homeServerCode)))
|
| 252 |
|
|
{
|
| 253 |
2298
|
tao
|
// If the docid's home server is not local host, but local host
|
| 254 |
1292
|
tao
|
// is a hub of this server, replicate the docid too.
|
| 255 |
|
|
// If the server is homeserver of the docid replication it too
|
| 256 |
2298
|
tao
|
MetacatReplication.replLog("force data replicating to "
|
| 257 |
1292
|
tao
|
+ server);
|
| 258 |
2298
|
tao
|
comeAndGetIt = new URL("https://" + server +
|
| 259 |
|
|
"?action=forcereplicatedatafile&server=" +
|
| 260 |
2579
|
tao
|
util.getLocalReplicationServerName() +
|
| 261 |
1292
|
tao
|
"&docid=" + docid + "&dbaction=" +
|
| 262 |
|
|
action);
|
| 263 |
2298
|
tao
|
//over write the url for delete
|
| 264 |
|
|
if (action != null && action.equals(DELETE))
|
| 265 |
|
|
{
|
| 266 |
|
|
comeAndGetIt = new URL("https://" + server + "?action=" +
|
| 267 |
|
|
MetacatReplication.FORCEREPLICATEDELETE +
|
| 268 |
2579
|
tao
|
"&docid=" + docid+"&server="+ util.getLocalReplicationServerName());
|
| 269 |
2298
|
tao
|
|
| 270 |
|
|
}
|
| 271 |
|
|
|
| 272 |
1292
|
tao
|
}//else if servercode==1
|
| 273 |
|
|
}//else if data file
|
| 274 |
2298
|
tao
|
|
| 275 |
1292
|
tao
|
}//if has explicite action
|
| 276 |
|
|
else
|
| 277 |
|
|
{ // has implicite action
|
| 278 |
|
|
MetacatReplication.replLog("force replicating (default action) to )"
|
| 279 |
|
|
+ server);
|
| 280 |
|
|
// this docid is xml documents and can replicate xml doucment
|
| 281 |
|
|
if (xmlDocument && replicationServer.getReplication())
|
| 282 |
|
|
{
|
| 283 |
|
|
// If homeserver of this doicd is local, replicate it
|
| 284 |
|
|
if (homeServerCode ==1)
|
| 285 |
2298
|
tao
|
{
|
| 286 |
|
|
comeAndGetIt = new URL("https://" + server +
|
| 287 |
|
|
"?action=forcereplicate&server=" +
|
| 288 |
2579
|
tao
|
util.getLocalReplicationServerName()+
|
| 289 |
581
|
berkley
|
"&docid=" + docid);
|
| 290 |
2298
|
tao
|
|
| 291 |
1292
|
tao
|
}//if homeserver ==1
|
| 292 |
|
|
else if (replicationServer.getHub()||
|
| 293 |
|
|
server.equals(MetacatReplication.
|
| 294 |
|
|
getServerNameForServerCode(homeServerCode)))
|
| 295 |
|
|
{
|
| 296 |
2298
|
tao
|
// If home server of this docid is not local host, but local
|
| 297 |
1292
|
tao
|
// host is a hub for this server, replicate this doicd
|
| 298 |
|
|
// If the server is homeserver of the docid, replication it too
|
| 299 |
2298
|
tao
|
comeAndGetIt = new URL("https://" + server +
|
| 300 |
|
|
"?action=forcereplicate&server=" +
|
| 301 |
2579
|
tao
|
util.getLocalReplicationServerName() +
|
| 302 |
1292
|
tao
|
"&docid=" + docid);
|
| 303 |
2298
|
tao
|
|
| 304 |
1292
|
tao
|
}//else if
|
| 305 |
2298
|
tao
|
|
| 306 |
1292
|
tao
|
}//if xmlDoucment
|
| 307 |
2298
|
tao
|
else if (replicationServer.getDataReplication())
|
| 308 |
1292
|
tao
|
{ //It is datafile and server is configured to replicate data file
|
| 309 |
2298
|
tao
|
|
| 310 |
1292
|
tao
|
//if home server is local host, replicate the data file
|
| 311 |
|
|
if (homeServerCode ==1)
|
| 312 |
|
|
{
|
| 313 |
2298
|
tao
|
comeAndGetIt = new URL("https://" + server +
|
| 314 |
|
|
"?action=forcereplicatedatafile&server=" +
|
| 315 |
2579
|
tao
|
util.getLocalReplicationServerName() +
|
| 316 |
1022
|
tao
|
"&docid=" + docid);
|
| 317 |
1292
|
tao
|
}//if
|
| 318 |
|
|
else if (replicationServer.getHub()||
|
| 319 |
|
|
server.equals(MetacatReplication.
|
| 320 |
|
|
getServerNameForServerCode(homeServerCode)))
|
| 321 |
|
|
{
|
| 322 |
|
|
// If home server is not local host, but the local host is a hub
|
| 323 |
|
|
// For this server, replicate the data file
|
| 324 |
|
|
// If the server is homeserver of the docid, replication it too
|
| 325 |
2298
|
tao
|
comeAndGetIt = new URL("https://" + server +
|
| 326 |
|
|
"?action=forcereplicatedatafile&server=" +
|
| 327 |
2579
|
tao
|
util.getLocalReplicationServerName() +
|
| 328 |
1292
|
tao
|
"&docid=" + docid);
|
| 329 |
2298
|
tao
|
|
| 330 |
1292
|
tao
|
}//else
|
| 331 |
|
|
}//else if
|
| 332 |
|
|
}//else has implicit action
|
| 333 |
2298
|
tao
|
|
| 334 |
1292
|
tao
|
//Make sure comeAndGetIt is not empty
|
| 335 |
|
|
if ( comeAndGetIt != null && !comeAndGetIt.equals(""))
|
| 336 |
|
|
{
|
| 337 |
2298
|
tao
|
MetaCatUtil.debugMessage("sending message: "
|
| 338 |
1292
|
tao
|
+ comeAndGetIt.toString(), 25);
|
| 339 |
|
|
String message = MetacatReplication.getURLContent(comeAndGetIt);
|
| 340 |
|
|
}
|
| 341 |
|
|
//send out the url. message is a dummy variable as the target of
|
| 342 |
|
|
//the URL never directly replies to the request. this simply
|
| 343 |
|
|
//invoces a read request from the server to this local machine.
|
| 344 |
|
|
}//if notification server
|
| 345 |
|
|
}//for
|
| 346 |
2298
|
tao
|
|
| 347 |
1022
|
tao
|
}//try
|
| 348 |
581
|
berkley
|
catch(Exception e)
|
| 349 |
|
|
{
|
| 350 |
2298
|
tao
|
System.out.println("error in ForceReplicationHandler.run: " +
|
| 351 |
675
|
berkley
|
e.getMessage());
|
| 352 |
581
|
berkley
|
e.printStackTrace(System.out);
|
| 353 |
|
|
}
|
| 354 |
1292
|
tao
|
MetaCatUtil.debugMessage("exiting ForceReplicationHandler Thread", 25);
|
| 355 |
|
|
}//run
|
| 356 |
|
|
}//ForceReplication class
|