@Override
protected void doInit() throws ResourceException {
super.doInit();
// Add a Cache-Control header that tells clients this page never
// expires.
final List<CacheDirective> directives = new ArrayList<>();
directives.add(CacheDirective.maxAge(Integer.MAX_VALUE));
directives.add(CacheDirective.publicInfo());
getResponseCacheDirectives().addAll(directives);
}
/**
* Analyzes incoming variables and returns suitable XML representation, the method also sets
* suitable cache directives.
*/
public Representation getVersionAsXMLRepresentatioFromDatabase() throws ResourceException {
Node dbResultObject = null;
// Check that we actually got an ehrID else scream...
if (ehrID == null || ehrID.length() == 0) {
throw new ResourceException(
Status.CLIENT_ERROR_BAD_REQUEST,
"Error: No " + EEEConstants.EHR_ID + " supplied in request");
}
// Check that we actually got an objectID else scream...
if (objectID == null || objectID.length() == 0) {
throw new ResourceException(
Status.CLIENT_ERROR_BAD_REQUEST,
"Error: No " + EEEConstants.OBJECT_ID + " supplied in request");
}
if (command != null) {
// Command examples
// * ---- /ehr/{ehrId}/{versionedObject}/{command} ---
// * http://localhost:8182/ehr/1234000/56780007/all_version_ids
// * http://localhost:8182/ehr/1234000/56780007/all_versions
// * http://localhost:8182/ehr/1234000/56780007/revision_history
throw new ResourceException(
Status.SERVER_ERROR_INTERNAL,
"Broken URI routing. Commands should be routed by "
+ EHRRouter.class.getName()
+ " to "
+ VersionedObjectCommandResource.class.getCanonicalName()
+ " instead of "
+ this.getClass().getCanonicalName()
+ " (You tried to send a /command to the object "
+ objectID
+ " in the EHR "
+ ehrID
+ ")");
} else if (lookupString != null) {
// Enters here only if command was null and lookupString != null
// @Command examples
// * ---- /ehr/{ehrId}/{versionedObject}@{versionLookup} ----
// * http://localhost:8182/ehr/1234000/56780007@latest_trunk_version
// * http://localhost:8182/ehr/1234000/56780007@latest_version
// * http://localhost:8182/ehr/1234000/56780007@2005-08-02T04:30:00
// TODO: Possibly insert a better string matcher for allowed @commands below
try {
if (lookupString.startsWith(LATEST_TRUNK_VERSION)) {
dbResultObject = dbReader.getVersionedObject_latest_trunk_version(ehrID, objectID);
getResponseCacheDirectives().add(CacheDirective.noCache());
} else if (lookupString.startsWith(LATEST_VERSION)) {
dbResultObject = dbReader.getVersionedObject_latest_version(ehrID, objectID);
getResponseCacheDirectives().add(CacheDirective.noCache());
}
// TODO: Insert a better string matcher for timestamps below
else if (lookupString.matches("(\\d{2,4})(?:\\-(\\d{2}))?(?:\\-(\\d{2}))?.*")) {
// OK, matched a date go on do a date lookup
dbResultObject = dbReader.getVersionedObject_at_time(ehrID, objectID, lookupString);
getResponseCacheDirectives()
.add(
CacheDirective
.noCache()); // FIXME: Consider if we actually could allow (private) caching
// of timestamped lookup resources
} else {
// @parameter unknown...
throw new ResourceException(
Status.CLIENT_ERROR_BAD_REQUEST,
"The parameter after @ was illegal. Try suffixing with a timestamp or '"
+ LATEST_TRUNK_VERSION
+ "' or '"
+ LATEST_VERSION
+ "' instead");
}
} catch (Exception e) {
// - internal error, DB not reached etc
throw new ResourceException(Status.SERVER_ERROR_INTERNAL, e);
}
} else if (treeID != null && systemID != null) {
// The commonly used DB lookup when we have ehrID, objectID, systemID
// and treeID is done here
// These fully identified version never change and can thus be cached for long time
getResponseCacheDirectives().add(CacheDirective.maxAge(identifiedVersionsMaxage.intValue()));
getResponseCacheDirectives().add(CacheDirective.privateInfo());
try {
dbResultObject = dbReader.getVersionedObject(ehrID, objectID, systemID, treeID);
// System.out.println("VersionedObjectResource ---> db OK");
} catch (Exception e) {
// - internal error, DB not reached etc
throw new ResourceException(Status.SERVER_ERROR_INTERNAL, e);
}
} else if (systemID == null && treeID == null && command == null && lookupString == null) {
// Now the resource was called with only ehrId and objectID, so return same as for
// command=ALL_VERSION_IDS
// TODO: Implement
getResponseCacheDirectives().add(CacheDirective.noCache());
throw new ResourceException(
Status.SERVER_ERROR_NOT_IMPLEMENTED,
"When implemented this would return all version IDs of the object "
+ objectID
+ " in the EHR "
+ ehrID);
} else {
throw new ResourceException(
Status.CLIENT_ERROR_BAD_REQUEST,
"This system did not recognize this combination of parameters "
+ "(Parameters found; ehrID:"
+ ehrID
+ ", objectID:"
+ objectID
+ ", systemID:"
+ systemID
+ ", treeID:"
+ treeID
+ ", command:"
+ command
+ ", lookupString:"
+ lookupString);
}
if (dbResultObject == null) {
// System.out.println("VersionedObjectResource ---> dbResultObject==null");
// Http error 404 if version not found
throw new ResourceException(
Status.CLIENT_ERROR_NOT_FOUND,
"Correct query format, but there was no such versioned object stored here. (You asked for "
+ ehrID
+ "::"
+ objectID
+ ":"
+ systemID
+ ":"
+ treeID
+ " )");
}
// ***** Now, if we got all the way here, then return (a version) in XML *******
return new DomRepresentation(MediaType.TEXT_XML, (Document) dbResultObject);
}