Hi All,

i am working on rest web service. i did one web service deleting some records but it took much time how to reduce deleting time please guide me

@POST
@ApiOperation(value = "GenericResponse", notes = "This service deletes a list of existing dataset from a project")
@Path("/{projectId}/dataset/deleteDatasets")
@Consumes(MediaType.APPLICATION_JSON)
@Produces(MediaType.APPLICATION_JSON)
public GenericResponse deleteMultipleDatasetsFromAProject(
@ApiParam(defaultValue = "ndxis") @HeaderParam("SM_USER") String user,
@PathParam("projectId") String projectId,
DeleteDatasetsDTO deleteDatasetsDTO) throws Exception {

GenericResponse genericResponse = new GenericResponse();

long projectID = Long.parseLong(projectId);
Long[] datasetIDs = deleteDatasetsDTO.getDatasetIds();
boolean validateDatasetstoProject = false;
for (long n : datasetIDs) {
validateDatasetstoProject = projectManagmentDelegate
.validateProjectDatasetbyId(projectID, n);
if (!(validateDatasetstoProject))
throw new OtherValidationException(Constants.INVALID_DATASET_ID);
}

boolean result = false;

result = projectManagmentDelegate.deleteDatasetsFromAProject(
datasetIDs, projectID);

if (result) {
genericResponse.setMessage(Constants.DATASETS_DELETE_SUCCESS);
} else {
genericResponse.setMessage(Constants.DATASETS_DELETE_FAILURE);
}

return genericResponse;
}



@Transactional
public boolean deleteDatasetsFromAProject(Long[] datasetList, long projectId)
throws IntegrationStudioRepositoryException {
boolean result = false;
if (dataSetRepository.removeMultiple(datasetList))
result = updateProjectTimestampToCurrent(projectId);
return result;
}

@Transactional
public boolean updateProjectTimestampToCurrent(long projectId)
throws IntegrationStudioRepositoryException {

return projectRepository.updateTimestamp(projectId);
}




public Boolean removeMultiple(Long[] datasetList)
throws IntegrationStudioRepositoryException {
Boolean status = false;
Session session = sessionFactory.getCurrentSession();

for (long n : datasetList) {

InputDatasetModel anObject = (InputDatasetModel) session.load(
InputDatasetModel.class, n);

if (anObject != null) {
session.delete(anObject);
status = true;
}
}

return status;
}