4 package uk.ac.vamsas.client.simpleclient;
6 import java.io.IOException;
7 import java.util.Vector;
9 import org.apache.commons.logging.Log;
10 import org.apache.commons.logging.LogFactory;
12 import uk.ac.vamsas.client.ClientHandle;
13 import uk.ac.vamsas.client.IClientAppdata;
14 import uk.ac.vamsas.client.IClientDocument;
15 import uk.ac.vamsas.client.UserHandle;
16 import uk.ac.vamsas.client.Vobject;
17 import uk.ac.vamsas.client.VorbaId;
18 import uk.ac.vamsas.objects.core.ApplicationData;
19 import uk.ac.vamsas.objects.core.User;
20 import uk.ac.vamsas.objects.core.VAMSAS;
21 import uk.ac.vamsas.objects.core.VamsasDocument;
22 import uk.ac.vamsas.objects.utils.AppDataReference;
23 import uk.ac.vamsas.test.objects.Core;
26 * Maintains a collection of vamsas objects, appdatas and states,
27 * and provides api for a SimpleClient's client.
28 * TODO: test and migrate ArchiveClient.getAppData methods to here and retest in ExampleApplication
31 public class ClientDocument extends uk.ac.vamsas.client.ClientDocument implements IClientDocument {
32 private static Log log = LogFactory.getLog(ClientDocument.class);
33 private VamsasDocument doc;
34 protected SimpleClient sclient;
35 protected VamsasArchive iohandler = null;
37 * indicate if new data has been incorporated
39 private boolean isModified = false;
41 * Public method for internal use by SimpleClient.
42 * @return true if document has been modified.
44 public boolean isModified() {
49 * prepare Application-side dataset from the vamsas Document iohandler
50 * @param doc - the dataset
51 * @param docHandler - the sessionFile IO handler
52 * @param Factory - the source of current and new vorbaIds
53 * @param sclient - the simpleclient instance
55 protected ClientDocument(VamsasDocument doc, VamsasArchive docHandler, IdFactory Factory, SimpleClient sclient) {
56 super(Factory.getVorbaIdHash(), Factory);
60 * prepare Application-side dataset from the vamsas Document iohandler
62 this.sclient = sclient;
63 iohandler = docHandler;
65 _VamsasRoots=doc.getVAMSAS();
71 * @see uk.ac.vamsas.client.IClientDocument#getObject(uk.ac.vamsas.client.VorbaId)
73 public Vobject getObject(VorbaId id) {
74 if (vamsasObjects==null) {
75 log.debug("getObject called on null objrefs list.");
78 if (vamsasObjects.containsKey(id))
79 return (Vobject) vamsasObjects.get(id);
80 log.debug("Returning null Vobject reference for id "+id.getId());
87 * @see uk.ac.vamsas.client.IClientDocument#getObjects(uk.ac.vamsas.client.VorbaId[])
89 public Vobject[] getObjects(VorbaId[] ids) {
90 if (vamsasObjects==null) {
91 log.debug("getObject[] called on null vamsasObjects list.");
94 Vobject[] vo = new Vobject[ids.length];
95 for (int i=0,j=ids.length; i<j;i++)
96 if (vamsasObjects.containsKey(ids[i]))
97 vo[i] = (Vobject) vamsasObjects.get(ids[i]);
99 log.debug("Returning null Vobject reference for id "+ids[i].getId());
103 * internal reference to single copy of Document Roots array
105 private VAMSAS[] _VamsasRoots=null;
107 protected void updateDocumentRoots() {
109 log.error("updateDocumentRoots called on null document. Probably an implementation error.");
113 if (_VamsasRoots!=null) {
114 doc.setVAMSAS(_VamsasRoots);
121 * LATER: currently there is only one Vector of roots ever passed to client - decide if this is correct (means this is not thread safe and may behave unexpectedly)
122 * @see uk.ac.vamsas.client.IClientDocument#getVamsasRoots()
124 public VAMSAS[] getVamsasRoots() {
126 log.debug("Null document for getVamsasRoots(), returning null");
129 if (iohandler==null) {
130 // LATER: decide on read-only status of ClientDocument object
131 log.warn("getVamsasRoots() called on possibly read-only document.");
133 if (_VamsasRoots!=null)
135 VAMSAS[] roots = doc.getVAMSAS();
137 // Make a new one to return to client to get filled.
138 _VamsasRoots = new VAMSAS[] { new VAMSAS() };
139 registerObject(_VamsasRoots[0]);
140 // Do provenance now. just in case.
141 doc.getProvenance().addEntry(sclient.getProvenanceEntry("Created new document root [id="+_VamsasRoots[0].getId()+"]"));
142 doc.addVAMSAS(_VamsasRoots[0]);
144 _VamsasRoots = new VAMSAS[roots.length];
145 for (int r=0;r<roots.length; r++)
146 _VamsasRoots[r] = roots[r];
151 private int _contains(VAMSAS root, VAMSAS[] docRoots) {
154 if (docRoots==null || docRoots.length==0)
156 VorbaId d_id=null,r_id = root.getVorbaId();
157 for (int i=0,j=docRoots.length; i<j; i++)
158 if (docRoots[i]==root || (docRoots[i]!=null && (d_id=docRoots[i].getVorbaId())!=null) && d_id.equals(r_id))
164 * verify that newr version is really an intact version of the
165 * @param newVersion (may be modified)
168 * @return true if newVersion is a valid root that preserves original references
170 private boolean isValidUpdate(VAMSAS newVersion, final VAMSAS oldVersion, ClientDocument modflag) {
171 // ideal - this cascades down the two structures, ensuring that all ID'd objects in one are present in the other.
172 if (oldVersion==newVersion) {
173 // may be a virgin root element.
174 if (!newVersion.isRegistered())
176 _registerObject(newVersion); // TODO: check - this call hasn't been tested. (seems to work now)
177 modflag.isModified=true;
179 // TODO: Should attempt to repair document if client app has deleted/broken bits of it
180 if (oldVersion.is__stored_in_document()) {
181 // retrieve compare hashCodes to detect update.
182 if (oldVersion.get__last_hash()!=oldVersion.hashCode())
184 log.debug("Modified hashcode for vamsas root "+oldVersion.getVorbaId());
185 modflag.isModified = true;
187 log.debug("Unmodified vamsas root "+oldVersion.getVorbaId());
190 // just do internal validation for moment.
192 if (SimpleClientConfig.validateUpdatedRoots())
193 newVersion.validate();
198 log.error("Validation Exception for new vamsas root :"+newVersion.getVorbaId(),e);
202 // redundant ? if (oldVersion.is__stored_in_document())
203 if (!newVersion.isRegistered())
205 _registerObject(newVersion);
206 modflag.isModified=true;
209 if (SimpleClientConfig.validateMergedRoots())
211 newVersion.validate();
213 modflag.isModified=true;
218 log.error("Validation Exception for new vamsas root :"+newVersion.getVorbaId(),e);
223 * LATER: MUCH LATER! - not needed for simple case and this routine shouldn't live in this class anymore
224 * isValidUpdate : Ideally. we efficiently walk down, comparing hashes, to deal with merging and verifying provenance for objects
226 // extract root objects
227 if (newroots != null) {
228 // check newroots for objects that were present in the old document
229 // check to see if the 'old' objects have been modified
230 // if they have ? we overwrite them with their new version, ensuring that
231 // provenance is updated.
232 // if they haven't ? do nothing ?
234 for (int i = 0, k = newroots.length; i < k; i++) {
235 if (newroots[i].isRegistered()) {
236 // easy - just check if anything has changed and do provenance
237 Vobject oldversion = getObject(newroots[i].getVorbaId());
238 if (oldversion instanceof VAMSAS) {
239 // LATER: appropriate merging behaviour when two clients have improperly modified the same Vobject independently.
240 if (newroots[i].get__last_hash() != newroots[i].hashCode()) {
241 // client has modified this Vobject since last retrieval.
242 if (newroots[i].get__last_hash() != oldversion.get__last_hash()) {
243 // Vobject has been modified by another client since this
245 // last access to document.
250 "SimpleClient error when using setVamsasRoots : The vorbaId for Vobject "
252 + " does not refer to an Vobject of type VAMSAS in the current document!");
255 if (!newroots[i].is__stored_in_document()) {
256 // check if Vobject is modified
257 if (newroots[i].get__last_hash() != newroots[i].hashCode()) {
258 // it is - so we add newroots[i] as a new Vobject, with updated
265 // just add newroots[i] as a new Vobject in the document
266 // - with appropriate provenance.
272 * merge old and new root vectors
273 * @param newr This array may be written to
275 * @param the client document (usually this) which this root set belongs to.
276 * @return merged vector of vamsas roots
278 private VAMSAS[] _combineRoots(VAMSAS[] newr, final VAMSAS[] original, ClientDocument modflag) {
279 Vector rts = new Vector();
280 boolean modified=false;
281 for (int i=0,j=original.length; i<j; i++) {
282 int k = _contains(original[i], newr);
284 if (isValidUpdate(newr[k], original[i], modflag)) {
285 // set by isValidUpdate if the hashcodes were really different from last store
289 // LATER: try harder to merge ducument roots.
290 log.warn("Couldn't merge new VAMSAS root "+newr[k].getId());
291 newr[k] = null; // LATER: this means we ignore mangled roots. NOT GOOD
295 rts.add(original[i]);
298 // add remaining (new) roots
299 for (int i=0,j=newr.length; i<j; i++) {
302 modflag.isModified=true;
305 newr = new VAMSAS[rts.size()];
306 for (int i=0,j=rts.size(); i<j; i++)
307 newr[i] = (VAMSAS) rts.get(i);
312 * update the document with new roots.
313 * LATER: decide: this affects the next call to getVamsasRoots()
314 * @see org.vamsas.IClientDocument.setVamsasRoots
316 public void setVamsasRoots(VAMSAS[] newroots) {
318 log.debug("setVamsasRoots called on null document.");
322 if (newroots==null) {
323 log.debug("setVamsasRoots(null) - do nothing.");
326 // are we dealing with same array ?
327 if (_VamsasRoots!=newroots) {
328 // merge roots into local version.
329 newr = new VAMSAS[newroots.length];
330 for (int i=0;i<newr.length;i++)
331 newr[i] = newroots[i];
332 newr=_combineRoots(newr,_VamsasRoots,this);
334 newr = new VAMSAS[_VamsasRoots.length];
335 for (int i=0;i<newr.length;i++)
336 newr[i]=_VamsasRoots[i];
338 // actually compare with document root set for final combination (to ensure nothing is lost)
339 _VamsasRoots = _combineRoots(newr, doc.getVAMSAS(), this);
344 * LATER: decide: this affects the next call to getVamsasRoots()
345 * @see uk.ac.vamsas.client.IClientDocument#addVamsasRoot(uk.ac.vamsas.objects.core.VAMSAS)
347 public void addVamsasRoot(VAMSAS newroot) {
349 log.debug("addVamsasRoots called on null document.");
352 VAMSAS[] newroots = _combineRoots(new VAMSAS[] {newroot}, getVamsasRoots(), this);
353 _VamsasRoots = newroots;
359 * @see uk.ac.vamsas.client.IClientDocument#registerObjects(uk.ac.vamsas.client.Vobject[])
361 public VorbaId[] registerObjects(Vobject[] unregistered) {
363 log.warn("registerObjects[] called on null document.");
366 if (vamsasObjects==null) {
367 log.warn("registerObjects[] called for null vamsasObjects hasharray.");
370 if (unregistered!=null) {
371 VorbaId ids[] = new VorbaId[unregistered.length];
372 for (int i=0,k=unregistered.length; i<k; i++)
373 if (unregistered[i]!=null) {
374 log.warn("Null Vobject passed to registerObject[] at position "+i);
377 ids[i]=registerObject(unregistered[i]);
379 log.debug("Registered "+unregistered.length+" objects - total of "+vamsasObjects.size()+" ids.");
385 * @see uk.ac.vamsas.client.IClientDocument#registerObject(uk.ac.vamsas.client.Vobject)
387 public VorbaId registerObject(Vobject unregistered) {
389 log.warn("registerObjects called on null document.");
392 if (vamsasObjects==null) {
393 log.warn("registerObjects called for null vamsasObjects hasharray.");
396 if (iohandler==null) {
397 log.warn("registerObjects called for read only document.");
401 if (unregistered!=null) {
402 VorbaId id = _registerObject(unregistered);
403 log.debug("Registered object - total of "+vamsasObjects.size()+" ids.");
406 log.warn("Null Vobject passed to registerObject.");
410 * IClientAppdata instance - if it exists.
412 SimpleClientAppdata scappd = null;
414 * @see uk.ac.vamsas.client.IClientDocument#getClientAppdata()
416 public IClientAppdata getClientAppdata() {
417 // TODO: getClientAppdata not tested in ArchiveClient mockup
418 log.error("TODO: TEST Client Appdata access methods");
420 log.warn("getClientAppdata called on null document.");
424 log.debug("Creating new SimpleClientAppdata instance for "+sclient.getSessionHandle());
425 scappd = new SimpleClientAppdata(this);
427 // LATER: may not need this as a warning message.
428 log.warn("Null appdata object for "+sclient.getSessionHandle());
430 log.debug("Created SimpleClientAppdata successfully.");
433 log.debug("Returning existing SimpleClientAppdata reference.");
438 * access the vamsas document
439 * @return the session's vamsas document
441 protected VamsasDocument getVamsasDocument() {
445 * returns the read-only IO interface for the vamsas document Jar file
448 protected VamsasArchiveReader getVamsasArchiveReader() {
449 if (iohandler==null) {
450 log.error("Near fatal. Null VamsasArchive iohandler so can't get VamsasArchiveReader");
454 log.info("TODO: test getVamsasArchiveReader");
455 return iohandler.getOriginalArchiveReader();
456 } catch (Exception e) {
457 log.warn("Unable to create OriginalArchiveReader!", e);
462 * called by vamsas api to write updated document to session
463 * @return true if update was successful
464 * @throws java.io.IOException
466 protected boolean updateSessionDocument() throws java.io.IOException {
467 boolean docupdate = true; // 'non-serious' problems below set this false
469 log.warn("updateSessionDocument called on null document.");
470 throw new java.io.IOException("Document is closed.");
472 if (iohandler==null) {
473 log.warn("updateSessionDocument called document iohandler handler.");
474 throw new java.io.IOException("Document is closed.");
477 if (!isModified() && !scappd.isModified()) {
478 log.debug("Document update not necessary. returning false.");
481 VamsasSession session = sclient._session;
482 log.debug("updating Session Document in "+session.sessionDir);
483 // update the VamsasDocument structure with any new appData's.
484 // try to update the sessionFile
485 log.debug("Attempting to update session "+sclient.session.getSessionUrn());
486 if (scappd!=null && scappd.isModified()) {
487 ClientHandle client = sclient.client;
488 UserHandle user = sclient.user;
489 scappd.closeForWriting();
490 if (scappd.appsGlobal==null) {
491 log.debug("Creating new appData entry for this application...");
492 // first write for this application - add a new section in document
493 ApplicationData appd = scappd.appsGlobal = new ApplicationData();
494 appd.setName(client.getClientName());
495 // appd.setUrn(client.getClientUrn());
496 appd.setVersion(client.getVersion());
497 doc.addApplicationData(appd);
498 // embed or jarEntry ? - for now only jarEntry's are dealt with.
499 appd.setDataReference(AppDataReference.uniqueAppDataReference(doc, sclient.client.getClientUrn()));
500 log.debug("... created.");
502 if (scappd.newAppData!=null && scappd.newAppData.sessionFile.exists()) {
503 log.debug("Beginning update for new Global Appdata...");
504 // new global appdata to write.
505 if (scappd.appsGlobal.getData()!=null) {
506 scappd.appsGlobal.setData(null);
507 scappd.appsGlobal.setDataReference(AppDataReference.uniqueAppDataReference(doc, sclient.client.getClientUrn()));
509 // LATER: use a switch to decide if the data should be written as a reference or as an embedded data chunk
510 scappd.updateAnAppdataEntry(iohandler, scappd.appsGlobal, scappd.newAppData);
511 log.debug("...Successfully updated Global Appdata Entry.");
513 if (scappd.newUserData!=null && scappd.newUserData.sessionFile.exists()) {
514 log.debug("Beginning to update Users Appdata entry....");
515 if (scappd.usersData==null) {
516 // create new user appdata
517 scappd.usersData = new User();
518 scappd.usersData.setFullname(user.getFullName());
519 scappd.usersData.setOrganization(user.getOrganization());
520 scappd.appsGlobal.addUser(scappd.usersData);
522 User appd = scappd.usersData;
523 if (appd.getData()!=null || appd.getDataReference()==null) {
524 // LATER make standard appDataReference constructor for client+user
526 String safe_username = user.getFullName();
527 int t = safe_username.indexOf(" ");
529 safe_username = safe_username.substring(t);
531 appd.setDataReference(AppDataReference.uniqueAppDataReference(doc, sclient.client.getClientUrn()+safe_username));
533 scappd.updateAnAppdataEntry(iohandler, scappd.usersData, scappd.newUserData);
534 log.debug("...Successfully updated user AppData entry.");
538 if (iohandler.transferRemainingAppDatas())
539 log.debug("Remaining appdatas were transferred.");
541 log.debug("No remaining appdatas were transferred. (Correct?)");
542 } catch (Exception e) {
543 log.error("While transferring remaining AppDatas", e);
545 log.debug("Updating Document...");
546 // now update the document. - this was basically the doUpdate method in test.ArchiveClient
547 updateDocumentRoots();
549 iohandler.putVamsasDocument(doc);
550 log.debug("Successfully written document entry.");
552 catch (Exception e) {
553 log.error("Marshalling error for vamsas document.",e);
554 docupdate = false; // pass on the (probable) object validation error
556 iohandler.closeArchive();
557 iohandler=null; // so this method cannot be called again for this instance
558 log.debug("...successully finished and closed.");
559 return docupdate; // no errors ?
562 * @see java.lang.Object#finalize()
564 protected void finalize() throws Throwable {
565 log.debug("Garbage collecting on ClientDocument instance.");
573 // disengage from client
575 sclient.cdocument = null;
580 public Vector getUpdatedObjects() {
581 // TODO: WALK through the document objects calling the update mechanism for each one, or just pass this vector back to client ?return updatedObjects;