source: main/trunk/greenstone3/src/java/org/greenstone/gsdl3/collection/ServiceCluster.java@ 23417

Last change on this file since 23417 was 23417, checked in by sjb48, 13 years ago

Started work on versioning and saving of format statement in ServiceCluster.java
  • Property svn:keywords set to Author Date Id Revision
File size: 27.3 KB
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1/*
2 * ServiceCluster.java
3 * Copyright (C) 2002 New Zealand Digital Library, http://www.nzdl.org
4 *
5 * This program is free software; you can redistribute it and/or modify
6 * it under the terms of the GNU General Public License as published by
7 * the Free Software Foundation; either version 2 of the License, or
8 * (at your option) any later version.
9 *
10 * This program is distributed in the hope that it will be useful,
11 * but WITHOUT ANY WARRANTY; without even the implied warranty of
12 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 * GNU General Public License for more details.
14 *
15 * You should have received a copy of the GNU General Public License
16 * along with this program; if not, write to the Free Software
17 * Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18 */
19// leave the package name as is for now - should be changed to something better
20// cluster? groups?
21package org.greenstone.gsdl3.collection;
22
23
24import org.greenstone.gsdl3.util.*;
25import org.greenstone.gsdl3.core.*;
26import org.greenstone.gsdl3.service.*;
27
28// java XML classes we're using
29import org.w3c.dom.Document;
30import org.w3c.dom.Node;
31import org.w3c.dom.Element;
32import org.w3c.dom.NodeList;
33
34import java.io.*;
35import java.io.File;
36import java.util.HashMap;
37import java.util.Iterator;
38
39import org.apache.log4j.*;
40
41/* ServiceCluster - a groups of services that are related in some way
42 * Implements ModuleInterface. Contains a list of services provided by the cluster, along with metadata about the cluster itself.
43 * a collection is a special type of cluster
44 * @author <a href="mailto:[email protected]">Katherine Don</a>
45 * @version $Revision: 23417 $
46 * @see ModuleInterface
47 */
48public class ServiceCluster
49 implements ModuleInterface {
50
51 static Logger logger = Logger.getLogger(org.greenstone.gsdl3.collection.ServiceCluster.class.getName());
52
53 protected static final String CONFIG_ENCODING = "utf-8";
54
55 protected static final String DEFAULT_LANG = "en"; // hack for now, should be read from the coll cfg file? or site cfg file for cluster
56
57 /** base directory for the site that this cluster belongs to*/
58 protected String site_home = null;
59 /** http address of the site that this cluster belongs to */
60 protected String site_http_address = null;
61 /** The name of the cluster - for a collection, this is the collection name*/
62 protected String cluster_name = null;
63 /** collection type : mg or mgpp */
64 protected String col_type = "";
65
66 /** a reference to the message router */
67 protected MessageRouter router = null;
68 /** The map of services.
69 *
70 * Maps Services to ServiceRack objects
71 * @see ServiceRack
72 *
73 */
74 protected HashMap service_map=null;
75 /** maps pseudo service names to real service names - needed if we have two services with the same name for one collection */
76 protected HashMap service_name_map=null;
77
78 /** XML converter for String to DOM and vice versa */
79 protected XMLConverter converter=null;
80
81 /** container doc for description elements */
82 protected Document doc = null;
83 /** list of services */
84 protected Element service_list = null;
85 /** list of metadata - all metadata, regardless of language goes in here */
86 protected Element metadata_list = null;
87 /** language specific stuff */
88 //protected Element lang_specific_metadata_list = null;
89 protected Element display_item_list = null;
90 /** the element that will have any descriptions passed back in */
91 protected Element description = null;
92
93 /** list of plugin */
94 protected Element plugin_item_list = null;
95
96 public void setSiteHome(String home) {
97 this.site_home = home;
98 }
99
100 public void setSiteAddress(String address) {
101 this.site_http_address = address;
102 }
103
104 public void cleanUp() {
105 Iterator i = this.service_map.values().iterator();
106 while (i.hasNext()) {
107 ServiceRack s = (ServiceRack)i.next();
108 s.cleanUp();
109 }
110 }
111 public void setClusterName(String name) {
112 this.cluster_name = name;
113 this.description.setAttribute(GSXML.NAME_ATT, name);
114 }
115
116 public void setMessageRouter(MessageRouter m) {
117 this.router = m;
118 }
119
120 public ServiceCluster() {
121 this.service_map = new HashMap();
122 this.service_name_map = new HashMap();
123 this.converter = new XMLConverter();
124 this.doc = this.converter.newDOM();
125 this.description = this.doc.createElement(GSXML.CLUSTER_ELEM);
126 this.display_item_list = this.doc.createElement(GSXML.DISPLAY_TEXT_ELEM+GSXML.LIST_MODIFIER);
127 this.metadata_list = this.doc.createElement(GSXML.METADATA_ELEM+GSXML.LIST_MODIFIER);
128 this.plugin_item_list = this.doc.createElement(GSXML.PLUGIN_ELEM+GSXML.LIST_MODIFIER);
129 }
130
131 /**
132 * Configures the cluster.
133 *
134 * gsdlHome and clusterName must be set before configure is called.
135 *
136 * reads the site configuration file, and configures itself
137 * this calls configure(Element) with the XML element node from the config
138 * file.
139 * configure(Element) should be used if the config file has already been
140 * parsed. This method will work with any subclass.
141 *
142 * @return true if configure successful, false otherwise.
143 */
144 public boolean configure() {
145
146 if (this.site_home == null || this.cluster_name== null) {
147 logger.error("site_home and cluster_name must be set before configure called!");
148 return false;
149 }
150 logger.info("configuring service cluster");
151 // read the site configuration file
152 File config_file = new File(GSFile.siteConfigFile(this.site_home));
153
154 if (!config_file.exists()) {
155 logger.error("couldn't configure cluster: "+this.cluster_name +", "+config_file+" does not exist");
156 return false;
157 }
158
159 Document doc = this.converter.getDOM(config_file, CONFIG_ENCODING);
160 if (doc == null) {
161 logger.error("couldn't parse config file "+config_file.getPath());
162 return false;
163 }
164
165 // get the appropriate service cluster element
166 Element cluster_list = (Element)GSXML.getChildByTagName(doc.getDocumentElement(), GSXML.CLUSTER_ELEM+GSXML.LIST_MODIFIER);
167 Element sc = GSXML.getNamedElement(cluster_list, GSXML.CLUSTER_ELEM,
168 GSXML.NAME_ATT, this.cluster_name);
169
170 return this.configure(sc);
171 }
172
173
174 public boolean configure(Element service_cluster_info) {
175
176 // get the metadata - for now just add it to the list
177 Element meta_list = (Element) GSXML.getChildByTagName(service_cluster_info, GSXML.METADATA_ELEM+GSXML.LIST_MODIFIER);
178 if (meta_list !=null) {
179 if (!addMetadata(meta_list)) {
180
181 logger.error(" couldn't configure the metadata");
182 }
183 }
184
185 // get the display info
186 Element display_list = (Element) GSXML.getChildByTagName(service_cluster_info, GSXML.DISPLAY_TEXT_ELEM+GSXML.LIST_MODIFIER);
187 if (display_list !=null) {
188 if (!addDisplayItems(display_list)) {
189
190 logger.error("couldn't configure the display items");
191 }
192 }
193
194 //get the plugin info
195 Element import_list = (Element) GSXML.getChildByTagName(service_cluster_info, GSXML.IMPORT_ELEM);
196 if (import_list != null)
197 {
198 Element plugin_list = (Element) GSXML.getChildByTagName(service_cluster_info, GSXML.PLUGIN_ELEM+GSXML.LIST_MODIFIER);
199 if (plugin_list !=null) {
200 if (!addPlugins(plugin_list)) {
201
202 logger.error("couldn't configure the plugins");
203 }
204 }
205 }
206
207 // do the service racks
208 // empty the service map in case this is a reconfigure
209 clearServices();
210 Element service_rack_list = (Element)GSXML.getChildByTagName(service_cluster_info, GSXML.SERVICE_CLASS_ELEM+GSXML.LIST_MODIFIER);
211 if (service_rack_list == null) {
212 // is this an error? could you ever have a service cluster
213 // without service racks???
214 logger.error("cluster has no service racks!!");
215 } else {
216
217 if (!configureServiceRackList(service_rack_list, null)) {
218 logger.error("couldn't configure the service racks!!");
219 return false;
220 }
221 }
222
223 return true;
224 }
225
226 /** adds metadata from a metadataList into the metadata_list xml
227 */
228 protected boolean addMetadata(Element metadata_list) {
229 if (metadata_list == null) return false;
230 NodeList metanodes = metadata_list.getElementsByTagName(GSXML.METADATA_ELEM);
231 if (metanodes.getLength()>0) {
232 for(int k=0; k<metanodes.getLength(); k++) {
233 this.metadata_list.appendChild(this.doc.importNode(metanodes.item(k), true));
234 }
235 }
236
237 return true;
238 }
239
240 protected boolean addDisplayItems(Element display_list) {
241
242 if (display_list==null) return false;
243 NodeList displaynodes = display_list.getElementsByTagName(GSXML.DISPLAY_TEXT_ELEM);
244 if (displaynodes.getLength()>0) {
245 for(int k=0; k<displaynodes.getLength(); k++) {
246 Element d = (Element) displaynodes.item(k);
247 String lang = d.getAttribute(GSXML.LANG_ATT);
248 if (lang==null||lang.equals("")) {
249 //set the lang to teh default
250 d.setAttribute(GSXML.LANG_ATT, DEFAULT_LANG);
251 }
252 String name = d.getAttribute(GSXML.NAME_ATT);
253 Element this_item = GSXML.getNamedElement(this.display_item_list, GSXML.DISPLAY_TEXT_ELEM, GSXML.NAME_ATT, name);
254 if (this_item==null) {
255 this_item = this.doc.createElement(GSXML.DISPLAY_TEXT_ELEM);
256 this_item.setAttribute(GSXML.NAME_ATT, name);
257 this.display_item_list.appendChild(this_item);
258 }
259
260 this_item.appendChild(this.doc.importNode(d, true));
261 }
262 }
263
264 return true;
265 }
266
267 protected boolean addPlugins(Element plugin_list) {
268 if (plugin_list == null) return false;
269 NodeList pluginNodes = plugin_list.getElementsByTagName(GSXML.PLUGIN_ELEM);
270 if (pluginNodes.getLength() > 0) {
271 for (int k = 0; k < pluginNodes.getLength(); k++)
272 {
273 this.plugin_item_list.appendChild(this.doc.importNode(pluginNodes.item(k), true));
274 }
275 }
276
277 return true;
278 }
279
280
281 protected void clearServices() {
282 service_map.clear();
283 this.service_list = this.doc.createElement(GSXML.SERVICE_ELEM+GSXML.LIST_MODIFIER);
284 }
285 /** creates and configures all the services - extra_info is some more xml
286that is passed to teh service - eg used for coll config files for Collection
287 */
288 protected boolean configureServiceRackList(Element service_rack_list,
289 Element extra_info) {
290
291 // create all the services
292 NodeList nodes = service_rack_list.getElementsByTagName(GSXML.SERVICE_CLASS_ELEM);
293 if (nodes.getLength()==0) {
294 logger.error("ServiceCluster configuration error: cluster "+this.cluster_name+" has no service modules!");
295 return false;
296 }
297
298 for(int i=0; i<nodes.getLength(); i++) {
299
300 // the xml request to send to the serviceRack to query what
301 // services it provides
302 Element message = this.doc.createElement(GSXML.MESSAGE_ELEM);
303 Element request = GSXML.createBasicRequest(this.doc, GSXML.REQUEST_TYPE_DESCRIBE, "", "", "");
304 message.appendChild(request);
305
306 Element n = (Element)nodes.item(i);
307 String servicetype = n.getAttribute(GSXML.NAME_ATT);
308
309 ServiceRack s = null;
310
311 try {
312 // try for a default service in standard package
313 s = (ServiceRack)Class.forName("org.greenstone.gsdl3.service."+servicetype).newInstance();
314
315 } catch (Exception e) {}
316 if (s == null) {
317 try {
318 // name as is, in case package is already specified
319 s = (ServiceRack)Class.forName(servicetype).newInstance();
320 } catch (Exception e) {}
321 }
322
323 if (s == null) {
324 logger.error("Couldn't get an instance of class "+servicetype+", or org.greenstone.gsdl3.service."+servicetype);
325 continue;
326 }
327
328
329 s.setSiteHome(this.site_home);
330 s.setSiteAddress(this.site_http_address);
331 s.setClusterName(this.cluster_name);
332 s.setMessageRouter(this.router);
333 // pass the xml node to the service for configuration
334 if (s.configure(n, extra_info)) {
335
336 // find out the supported service types for this service module
337 Node types = s.process(message);
338 NodeList typenodes = ((Element)types).getElementsByTagName(GSXML.SERVICE_ELEM);
339
340 for (int j=0; j<typenodes.getLength();j++) {
341 String service = ((Element) typenodes.item(j)).getAttribute(GSXML.NAME_ATT);
342 if (service_map.get(service)!=null) {
343 char extra = '0';
344 String new_service = service+extra;
345
346 while (service_map.get(new_service)!=null) {
347 extra++;
348 new_service = service+extra;
349 }
350 this.service_name_map.put(new_service, service);
351 service=new_service;
352 ((Element) typenodes.item(j)).setAttribute(GSXML.NAME_ATT, service);
353 }
354 this.service_map.put(service, s);
355 // also add info to the ServiceInfo XML element
356 this.service_list.appendChild(this.doc.importNode(typenodes.item(j), true));
357 }
358 }
359 }
360
361 return true;
362
363
364 }
365
366
367 /**
368 * Process an XML document - uses Strings
369 * just calls process(Node).
370 *
371 * @param in the Document to process - a string
372 * @return the resultant document as a string - contains any error messages
373 * @see String
374 */
375 public String process(String in) {
376
377 Document doc = this.converter.getDOM(in);
378
379 Node res = process(doc);
380 return this.converter.getString(res);
381
382 }
383
384 /** process XML as Node
385 *
386 */
387 public Node process(Node message_node) {
388
389 Element message = this.converter.nodeToElement(message_node);
390
391 NodeList requests = message.getElementsByTagName(GSXML.REQUEST_ELEM);
392 Document mess_doc = message.getOwnerDocument();
393 Element mainResult = this.doc.createElement(GSXML.MESSAGE_ELEM);
394 if (requests.getLength()==0) {
395 logger.error("no requests for cluster:"+this.cluster_name);
396 // no requests
397 return mainResult; // for now
398 }
399 for (int i=0; i<requests.getLength(); i++) {
400 Element request = (Element)requests.item(i);
401 String to = request.getAttribute(GSXML.TO_ATT);
402
403 // the cluster name should be first, check, then remove
404 String clustername = GSPath.getFirstLink(to);
405 if (!clustername.equals(this.cluster_name)){
406 logger.error("cluster name wrong! was "+clustername+" should have been "+this.cluster_name);
407 continue; // ignore this request
408 }
409 to = GSPath.removeFirstLink(to);
410 request.setAttribute(GSXML.TO_ATT, to);
411
412 if (to.equals("")) { // this command is for me
413 Element response = processMessage(request);
414 mainResult.appendChild(response);
415
416 } else { // the request is for one of my services
417 String service = GSPath.getFirstLink(to);
418
419 if (!this.service_map.containsKey(service)) {
420 logger.error("non-existant service, "+service+", specified!");
421 continue;
422 }
423 String real_service = service;
424 if (this.service_name_map.containsKey(service)) {
425 real_service = (String)this.service_name_map.get(service);
426 // need to change the to att in the request - give the real service name
427 to = request.getAttribute(GSXML.TO_ATT);
428 String old_to = to;
429 to = GSPath.replaceFirstLink(to, real_service);
430 request.setAttribute(GSXML.TO_ATT, to);
431 }
432 // have to pass the request to the service
433 Element single_message = mess_doc.createElement(GSXML.MESSAGE_ELEM);
434 single_message.appendChild(request);
435 Node response_message = ((ModuleInterface)this.service_map.get(service)).process(single_message);
436 if (response_message != null) {
437 Element response = (Element) GSXML.getChildByTagName(response_message, GSXML.RESPONSE_ELEM);
438 String from = response.getAttribute(GSXML.FROM_ATT);
439 if (!real_service.equals(service)) {
440 // replace the real service name with the pseudo service name
441 from = GSPath.replaceFirstLink(from, service);
442 // also need to do it in the service itself
443 // shoudl this be done here??
444 Element service_elem = (Element) GSXML.getChildByTagName(response, GSXML.SERVICE_ELEM);
445 if (service_elem!= null) {
446 service_elem.setAttribute(GSXML.NAME_ATT, service);
447 }
448 }
449 from = GSPath.prependLink(from, this.cluster_name);
450 response.setAttribute(GSXML.FROM_ATT, from);
451 mainResult.appendChild(this.doc.importNode(response, true));
452 }
453
454 } // else
455
456
457 } // for each request
458 return mainResult;
459 }
460
461 /** handles requests made to the ServiceCluster itself
462 *
463 * @param req - the request Element- <request>
464 * @return the result Element - should be <response>
465 */
466 protected Element processMessage(Element request) {
467
468 Element response = this.doc.createElement(GSXML.RESPONSE_ELEM);
469 response.setAttribute(GSXML.FROM_ATT, this.cluster_name);
470 String type = request.getAttribute(GSXML.TYPE_ATT);
471 String lang = request.getAttribute(GSXML.LANG_ATT);
472 response.setAttribute(GSXML.TYPE_ATT, type);
473
474 if (type.equals(GSXML.REQUEST_TYPE_DESCRIBE)) {
475 // create the collection element
476 Element description = (Element)this.description.cloneNode(false);
477 // set collection type : mg or mgpp
478 description.setAttribute(GSXML.TYPE_ATT, col_type);
479
480 response.appendChild(description);
481 // check the param list
482 Element param_list = (Element) GSXML.getChildByTagName(request, GSXML.PARAM_ELEM+GSXML.LIST_MODIFIER);
483 if (param_list == null) {
484 addAllDisplayInfo(description, lang);
485 description.appendChild(this.service_list);
486 description.appendChild(this.metadata_list);
487 description.appendChild(this.plugin_item_list);
488 return response;
489 }
490
491 // go through the param list and see what components are wanted
492 NodeList params = param_list.getElementsByTagName(GSXML.PARAM_ELEM);
493 for (int i=0; i<params.getLength(); i++) {
494
495 Element param = (Element)params.item(i);
496 // Identify the structure information desired
497 if (param.getAttribute(GSXML.NAME_ATT).equals(GSXML.SUBSET_PARAM)) {
498 String info = param.getAttribute(GSXML.VALUE_ATT);
499 if (info.equals(GSXML.SERVICE_ELEM+GSXML.LIST_MODIFIER)) {
500 description.appendChild(this.service_list);
501 } else if (info.equals(GSXML.METADATA_ELEM+GSXML.LIST_MODIFIER)) {
502 description.appendChild(metadata_list);
503 } else if (info.equals(GSXML.DISPLAY_TEXT_ELEM+GSXML.LIST_MODIFIER)) {
504 addAllDisplayInfo(description, lang);
505 } else if (info.equals(GSXML.PLUGIN_ELEM+GSXML.LIST_MODIFIER)) {
506 description.appendChild(plugin_item_list);
507 }
508 }
509 }
510 return response;
511 }
512
513 if (type.equals(GSXML.REQUEST_TYPE_FORMAT_STRING)) {
514 logger.error("Received format string request");
515 String service = request.getAttribute("service");
516 logger.error("Service is " + service);
517 String classifier = null;
518 if(service.equals("ClassifierBrowse"))
519 {
520 classifier = request.getAttribute("classifier");
521 logger.error("Classifier is " + classifier);
522 }
523 Element format_element = (Element) GSXML.getChildByTagName(request, GSXML.FORMAT_STRING_ELEM);
524 String format_string = GSXML.getNodeText(format_element);
525 logger.error("Format string: " + format_string);
526 logger.error("Config file location = " + GSFile.collectionConfigFile(this.site_home, this.cluster_name));
527
528 // check for version file
529
530 String directory = new File(GSFile.collectionConfigFile(this.site_home, this.cluster_name)).getParent() + "/";
531 logger.error("Directory is " + directory);
532
533 String version_filename = "";
534
535 if(service.equals("ClassifierBrowse"))
536 version_filename = directory + "browse_"+classifier+"_format_statement_version.txt";
537 else
538 version_filename = directory + "query_format_statement_version.txt";
539
540 File version_file = new File(version_filename);
541 logger.error("Version filename is " + version_filename);
542 String version_number = "1";
543
544 try{
545
546 if(version_file.exists())
547 {
548 // Read version
549 BufferedReader reader = new BufferedReader(new FileReader(version_filename));
550 version_number = reader.readLine();
551 int aInt = Integer.parseInt(version_number) + 1;
552 version_number = Integer.toString(aInt);
553 reader.close();
554 }
555 else{
556 // Create
557 version_file.createNewFile();
558 // write 1 to file
559 BufferedWriter writer = new BufferedWriter(new FileWriter(version_filename));
560 writer.write(version_number);
561 writer.close();
562 }
563
564 // Write version file
565 String format_statement_filename = "";
566
567 if(service.equals("ClassifierBrowse"))
568 format_statement_filename = directory + "browse_"+classifier+"_format_statement_v" + version_number + ".txt";
569 else
570 format_statement_filename = directory + "query_format_statement_v" + version_number + ".txt";
571
572 logger.error("Format statement filename is " + format_statement_filename);
573
574 BufferedWriter writer = new BufferedWriter(new FileWriter(format_statement_filename));
575 writer.write(format_string);
576 writer.close();
577
578 // Update version number
579
580 } catch (IOException e) {
581 logger.error("IO Exception "+e);
582 //System.exit(1);
583 }
584
585
586 }
587 if (type.equals(GSXML.REQUEST_TYPE_SYSTEM)) {
588 response = processSystemRequest(request);
589 } else { // unknown type
590 logger.error("cant handle request of type "+ type);
591
592 }
593 return response;
594 }
595
596 protected Element processSystemRequest(Element request) {
597
598 Element response = this.doc.createElement(GSXML.RESPONSE_ELEM);
599 response.setAttribute(GSXML.FROM_ATT, this.cluster_name);
600 response.setAttribute(GSXML.TYPE_ATT, GSXML.REQUEST_TYPE_SYSTEM);
601
602 // a list of system requests - should put any error messages
603 // or success messages into response
604 NodeList commands = request.getElementsByTagName(GSXML.SYSTEM_ELEM);
605 String message=null;
606 for (int i=0; i<commands.getLength(); i++) {
607 // all the commands should be Elements
608 Element elem = (Element)commands.item(i);
609 String action = elem.getAttribute(GSXML.TYPE_ATT);
610 if (action.equals(GSXML.SYSTEM_TYPE_CONFIGURE)) {
611 String subset = elem.getAttribute(GSXML.SYSTEM_SUBSET_ATT);
612 if (subset.equals("")) {
613 // need to reconfigure the service cluster
614
615 if (this.configure()) {
616 Element s = GSXML.createTextElement(this.doc, GSXML.STATUS_ELEM, this.cluster_name + " reconfigured");
617 response.appendChild(s);
618
619 } else {
620 Element s = GSXML.createTextElement(this.doc, GSXML.STATUS_ELEM, this.cluster_name + " could not be reconfigured");
621 response.appendChild(s);
622 }
623 } else if (this.configureSubset(subset)) {
624 Element s = GSXML.createTextElement(this.doc, GSXML.STATUS_ELEM, this.cluster_name + " "+subset+" reconfigured");
625 response.appendChild(s);
626 } else {
627 Element s = GSXML.createTextElement(this.doc, GSXML.STATUS_ELEM, this.cluster_name + " "+subset + " could not be reconfigured");
628 response.appendChild(s);
629 }
630 continue;
631 } // configure action
632
633 String module_name = elem.getAttribute(GSXML.SYSTEM_MODULE_NAME_ATT);
634 String module_type = elem.getAttribute(GSXML.SYSTEM_MODULE_TYPE_ATT);
635 if (action.equals(GSXML.SYSTEM_TYPE_ACTIVATE)) {
636 Element s = GSXML.createTextElement(this.doc, GSXML.STATUS_ELEM, "activate action not yet implemented - does it even make sense in this context??");
637 response.appendChild(s);
638 } else if (action.equals(GSXML.SYSTEM_TYPE_DEACTIVATE)) {
639 if (module_type.equals(GSXML.SERVICE_ELEM)) {
640 // deactivate the service
641 // remove from service_map
642 this.service_map.remove(module_name);
643 Element service_elem = GSXML.getNamedElement(this.service_list, GSXML.SERVICE_ELEM, GSXML.NAME_ATT, module_name);
644 service_list.removeChild(service_elem);
645 message = module_type+": "+module_name+" deactivated";
646 } else {
647 message = "can't deactivate "+module_type+" type modules!";}
648 Element s = GSXML.createTextElement(this.doc, GSXML.STATUS_ELEM, message);
649 response.appendChild(s);
650 } else {
651 logger.error("cant process system request, action "+action);
652 continue;
653 }
654 } // for each command
655 return response;
656 }
657
658 /**
659 * do a configure on only part of the collection
660 */
661 protected boolean configureSubset(String subset) {
662
663 File configFile = new File(GSFile.siteConfigFile(this.site_home));
664 if (!configFile.exists() ) {
665 logger.error("site config file: "+configFile.getPath()+" not found!");
666 // wont be able to do any of the requests
667 return false;
668
669 }
670
671 Document site_config_doc = this.converter.getDOM(configFile);
672 if (site_config_doc == null) {
673 logger.error("could not read in site config file: "+configFile.getPath());
674 return false;
675 }
676
677 Element site_config_elem = site_config_doc.getDocumentElement();
678 Element cluster_config_elem = GSXML.getNamedElement((Element)GSXML.getChildByTagName(site_config_elem, GSXML.CLUSTER_ELEM+GSXML.LIST_MODIFIER), GSXML.CLUSTER_ELEM, GSXML.NAME_ATT, this.cluster_name);
679 if (cluster_config_elem == null) {
680 logger.error("site config file: "+configFile.getPath()+" has no element for cluster "+this.cluster_name);
681 // wont be able to do any of teh requests
682 return false;
683
684 }
685 if (subset.equals(GSXML.SERVICE_ELEM+GSXML.LIST_MODIFIER)) {
686 Element service_rack_list = (Element)GSXML.getChildByTagName(cluster_config_elem, GSXML.SERVICE_CLASS_ELEM+GSXML.LIST_MODIFIER);
687 clearServices();
688 return configureServiceRackList(service_rack_list, null);
689 } else if (subset.equals(GSXML.METADATA_ELEM+GSXML.LIST_MODIFIER)) {
690 this.metadata_list = this.doc.createElement(GSXML.METADATA_ELEM+GSXML.LIST_MODIFIER);
691 Element metadata_list = (Element)GSXML.getChildByTagName(cluster_config_elem, GSXML.METADATA_ELEM+GSXML.LIST_MODIFIER);
692 return addMetadata(metadata_list);
693 } else if (subset.equals(GSXML.PLUGIN_ELEM+GSXML.LIST_MODIFIER)) {
694 this.plugin_item_list = this.doc.createElement(GSXML.PLUGIN_ELEM+GSXML.LIST_MODIFIER);
695 Element import_list = (Element)GSXML.getChildByTagName(cluster_config_elem,GSXML.IMPORT_ELEM);
696 if (import_list != null)
697 {
698 Element plugin_item_list = (Element)GSXML.getChildByTagName(cluster_config_elem,GSXML.PLUGIN_ELEM+GSXML.LIST_MODIFIER);
699 return addPlugins(plugin_item_list);
700 }
701 else
702 return false;
703 } else {
704 logger.error("cannot process system request, configure "+subset);
705 return false;
706 }
707
708 }
709
710
711 protected boolean addAllDisplayInfo(Element description, String lang) {
712
713 NodeList items = this.display_item_list.getChildNodes();
714 for (int i=0; i<items.getLength(); i++) { // for each key
715 Element m = (Element) items.item(i);
716 // find the child with the correct language
717 Element new_m = GSXML.getNamedElement(m, GSXML.DISPLAY_TEXT_ELEM, GSXML.LANG_ATT, lang);
718 if (new_m==null && lang != DEFAULT_LANG) {
719 // use the default lang
720 new_m = GSXML.getNamedElement(m, GSXML.DISPLAY_TEXT_ELEM, GSXML.LANG_ATT, DEFAULT_LANG);
721 }
722 if (new_m==null) {
723 // just get the first one
724 new_m = (Element)GSXML.getChildByTagName(m, GSXML.DISPLAY_TEXT_ELEM);
725 }
726 description.appendChild(new_m.cloneNode(true));
727 }
728 return true;
729
730 }
731
732
733 protected Element getDisplayTextElement(String key, String lang) {
734
735 Element this_item = GSXML.getNamedElement(this.display_item_list, GSXML.DISPLAY_TEXT_ELEM, GSXML.NAME_ATT, key);
736 if (this_item == null) {
737 return null;
738 }
739
740 Element this_lang = GSXML.getNamedElement(this_item, GSXML.DISPLAY_TEXT_ELEM, GSXML.LANG_ATT, lang);
741 if (this_lang == null && lang != DEFAULT_LANG) {
742 // try the default
743 this_lang = GSXML.getNamedElement(this_item, GSXML.DISPLAY_TEXT_ELEM, GSXML.LANG_ATT, DEFAULT_LANG);
744 }
745 if (this_lang == null) {
746 // just return the first one
747 return GSXML.getFirstElementChild(this_item);//(Element)this_item.getFirstChild().cloneNode(true);
748 }
749 return (Element)this_lang.cloneNode(true);
750
751 }
752 public HashMap getServiceMap() {
753 return service_map;
754 }
755}
756
757
758
759
760
761
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