private void createStoreThumb(
String dsIrodsPath,
int width,
int height,
String dsname,
boolean exists,
List<String> thumbRels)
throws Exception {
String resultPath = runConvertScaleStage(dsIrodsPath, "PNG", width, height);
String resultURI =
((AbstractIrodsObjectEnhancementService) service).makeIrodsURIFromPath(resultPath);
if (!exists) {
String message = "adding thumbnail";
client.addManagedDatastream(
pid,
dsname,
false,
message,
Collections.<String>emptyList(),
"Thumbnail Image",
false,
"image/png",
resultURI);
} else {
String message = "updating thumbnail";
client.modifyDatastreamByReference(
pid,
dsname,
false,
message,
new ArrayList<String>(),
"Thumbnail Image",
"image/png",
null,
null,
resultURI);
}
PID newDSPID = new PID(pid.getPid() + "/" + dsname);
if (thumbRels == null || !thumbRels.contains(newDSPID.getURI())) {
client.setExclusiveTripleRelation(
pid, CDRProperty.thumb.getPredicate(), CDRProperty.thumb.getNamespace(), newDSPID);
}
((AbstractIrodsObjectEnhancementService) service).deleteIRODSFile(resultPath);
}
@Override
public String getTargetID() {
return pid.getPid();
}
@Override
public Element call() throws EnhancementException {
Element result = null;
LOG.debug("Called thumbnail enhancement service for {}", pid);
String surrogateDsUri = null;
String surrogateDsId = null;
PID surrogatePid = null;
String dsLocation = null;
String dsIrodsPath = null;
try {
// enqueues objects that use this one as a surrogate.
List<PID> usesMeForSurrogate =
this.service.getTripleStoreQueryService().fetchPIDsSurrogateFor(pid);
for (PID usesMe : usesMeForSurrogate) {
this.service
.getMessageDirector()
.direct(
new EnhancementMessage(
usesMe,
JMSMessageUtil.servicesMessageNamespace,
JMSMessageUtil.ServicesActions.APPLY_SERVICE.getName(),
ThumbnailEnhancementService.class.getName()));
this.service
.getMessageDirector()
.direct(
new EnhancementMessage(
usesMe,
JMSMessageUtil.servicesMessageNamespace,
JMSMessageUtil.ServicesActions.APPLY_SERVICE.getName(),
SolrUpdateEnhancementService.class.getName()));
}
// get sourceData data stream IDs
List<String> surrogateDSIDs = this.service.getTripleStoreQueryService().getSurrogateData(pid);
if (surrogateDSIDs == null || surrogateDSIDs.size() < 1) {
throw new EnhancementException(pid, "Cannot find a suitable DSID for making a thumbnail.");
}
surrogateDsUri = surrogateDSIDs.get(0);
surrogateDsId = surrogateDsUri.substring(surrogateDsUri.lastIndexOf("/") + 1);
surrogatePid = new PID(surrogateDsUri.substring(0, surrogateDsUri.lastIndexOf("/")));
Document foxml = this.retrieveFoxml();
Document surrogateFoxml;
// Only retrieve the surrogate FOXML if the surrogate is a different object
if (surrogatePid.equals(message.getPid())) {
surrogateFoxml = foxml;
} else {
surrogateFoxml = client.getObjectXML(surrogatePid);
}
Element newestSourceDS =
FOXMLJDOMUtil.getMostRecentDatastream(
ContentModelHelper.Datastream.getDatastream(surrogateDsId), surrogateFoxml);
if (newestSourceDS == null)
throw new EnhancementException(
"Specified source or surrogate datastream "
+ surrogateDsUri
+ " was not found, the object "
+ this.pid.getPid()
+ " is most likely invalid",
Severity.UNRECOVERABLE);
dsLocation =
newestSourceDS
.getChild("contentLocation", JDOMNamespaceUtil.FOXML_NS)
.getAttributeValue("REF");
LOG.debug("Source DS location: {}", dsLocation);
if (dsLocation != null) {
dsIrodsPath = client.getIrodsPath(dsLocation);
LOG.debug("Making 2 Thumbnails..");
List<String> thumbRels =
FOXMLJDOMUtil.getRelationValues(
ContentModelHelper.CDRProperty.thumb.getPredicate(),
JDOMNamespaceUtil.CDR_NS,
FOXMLJDOMUtil.getRelsExt(foxml));
{
String dsname = ContentModelHelper.Datastream.THUMB_SMALL.getName();
boolean exists = client.getDatastream(pid, dsname) != null;
createStoreThumb(dsIrodsPath, 64, 64, dsname, exists, thumbRels);
}
{
String dsname = ContentModelHelper.Datastream.THUMB_LARGE.getName();
boolean exists = client.getDatastream(pid, dsname) != null;
createStoreThumb(dsIrodsPath, 128, 128, dsname, exists, thumbRels);
}
}
} catch (EnhancementException e) {
throw e;
} catch (FileSystemException e) {
throw new EnhancementException(e, Severity.FATAL);
} catch (NotFoundException e) {
throw new EnhancementException(e, Severity.UNRECOVERABLE);
} catch (FedoraException e) {
throw new EnhancementException(
"Thumbnail Enhancement failed to process, pid: "
+ pid.getPid()
+ " surrogateDS: "
+ surrogateDsId,
e,
Severity.RECOVERABLE);
} catch (Exception e) {
throw new EnhancementException(
"Thumbnail Enhancement failed to process, pid "
+ pid.getPid()
+ " surrogateDS: "
+ surrogateDsId,
e,
Severity.UNRECOVERABLE);
}
return result;
}