/**
* Gets the current status of the object, (including transition status), for the object specified
* by path.
*
* @param requestPath path to a file
* @return JSONObject current QoS status
* @throws CacheException
*/
@GET
@Path("{requestPath : .*}")
@Produces(MediaType.APPLICATION_JSON)
public BackendCapabilityResponse getQosStatus(@PathParam("requestPath") String requestPath)
throws CacheException, URISyntaxException {
BackendCapabilityResponse response = new BackendCapabilityResponse();
try {
if (Subjects.isNobody(ServletContextHandlerAttributes.getSubject())) {
throw new PermissionDeniedCacheException("Permission denied");
}
FileAttributes fileAttributes = getFileAttributes(requestPath);
FileLocality fileLocality = getLocality(fileAttributes);
CellStub cellStub = ServletContextHandlerAttributes.getPinManager(ctx);
boolean isPinned = isPinned(fileAttributes, cellStub);
switch (fileLocality) {
case NEARLINE:
if (isPinned) {
response.setQoS(QosManagement.TAPE);
response.setTargetQoS(QosManagement.DISK_TAPE);
} else {
response.setQoS(QosManagement.TAPE);
}
break;
case ONLINE:
response.setQoS(QosManagement.DISK);
break;
case ONLINE_AND_NEARLINE:
/* When the locality of the file is NEARLINE_ONLINE and
* the object is not pinned the result for the user will be displayed as NEARLINE (Tape).
* else nearline_online (disk+tape)
*/
if (isPinned) {
response.setQoS(QosManagement.DISK_TAPE);
} else {
response.setQoS(QosManagement.TAPE);
}
break;
default:
// error cases
throw new InternalServerErrorException();
}
} catch (PermissionDeniedCacheException e) {
if (Subjects.isNobody(ServletContextHandlerAttributes.getSubject())) {
throw new NotAuthorizedException(e);
} else {
throw new ForbiddenException(e);
}
} catch (FileNotFoundCacheException e) {
throw new NotFoundException(e);
} catch (CacheException | InterruptedException e) {
throw new InternalServerErrorException(e);
}
return response;
}
/**
* Starts a object transition to the specified QoS.
*
* @param requestPath path to a file
* @param requestPath requestQuery
* @return JSONObject current QoS status
* @throws CacheException
*/
@POST
@Path("{requestPath : .*}")
@Consumes({MediaType.APPLICATION_JSON})
@Produces(MediaType.APPLICATION_JSON)
public String changeQosStatus(@PathParam("requestPath") String requestPath, String requestQuery)
throws CacheException, URISyntaxException, InterruptedException {
JSONObject jsonResponse = new JSONObject();
try {
if (Subjects.isNobody(ServletContextHandlerAttributes.getSubject())) {
throw new PermissionDeniedCacheException("Permission denied");
}
JSONObject jsonRequest = new JSONObject(requestQuery);
String update = jsonRequest.get("update").toString();
FileAttributes fileAttributes = getFileAttributes(requestPath);
CellStub cellStub = ServletContextHandlerAttributes.getPinManager(ctx);
FileLocality fileLocality = getLocality(fileAttributes);
switch (update) {
// change QoS to "disk+tape"
case QosManagement.DISK_TAPE:
makeDiskAndTape(fileLocality, fileAttributes, cellStub);
break;
// change QoS to "tape"
case QosManagement.TAPE:
makeTape(fileLocality, fileAttributes, cellStub);
break;
default:
// error cases
throw new BadRequestException();
}
} catch (PermissionDeniedCacheException e) {
if (Subjects.isNobody(ServletContextHandlerAttributes.getSubject())) {
throw new NotAuthorizedException(e);
} else {
throw new ForbiddenException(e);
}
} catch (FileNotFoundCacheException e) {
throw new NotFoundException(e);
} catch (CacheException e) {
throw new InternalServerErrorException(e);
} catch (JSONException e) {
throw new BadRequestException(e);
}
jsonResponse.put("status", "200");
jsonResponse.put("message", "Transition was successful");
return jsonResponse.toString();
}
public FileAttributes getFileAttributes(String requestPath) throws CacheException {
PnfsHandler handler = ServletContextHandlerAttributes.getPnfsHandler(ctx);
FsPath path;
if (requestPath == null || requestPath.isEmpty()) {
path = FsPath.ROOT;
} else {
path = FsPath.create(FsPath.ROOT + requestPath);
}
Set<FileAttribute> attributes = EnumSet.allOf(FileAttribute.class);
FileAttributes namespaceAttrributes = handler.getFileAttributes(path, attributes);
return namespaceAttrributes;
}
public FileLocality getLocality(FileAttributes fileAttributes) {
RemotePoolMonitor remotePoolMonitor = ServletContextHandlerAttributes.getRemotePoolMonitor(ctx);
return remotePoolMonitor.getFileLocality(fileAttributes, request.getRemoteHost());
}