void SaveMD::doSaveEvents(typename MDEventWorkspace<MDE, nd>::sptr ws) { std::string filename = getPropertyValue("Filename"); bool update = getProperty("UpdateFileBackEnd"); bool MakeFileBacked = getProperty("MakeFileBacked"); bool wsIsFileBacked = ws->isFileBacked(); if (update && MakeFileBacked) throw std::invalid_argument( "Please choose either UpdateFileBackEnd or MakeFileBacked, not both."); if (MakeFileBacked && wsIsFileBacked) throw std::invalid_argument( "You picked MakeFileBacked but the workspace is already file-backed!"); BoxController_sptr bc = ws->getBoxController(); if (!wsIsFileBacked) { // Erase the file if it exists Poco::File oldFile(filename); if (oldFile.exists()) oldFile.remove(); } auto prog = new Progress(this, 0.0, 0.05, 1); if (update) // workspace has its own file and ignores any changes to the // algorithm parameters { if (!ws->isFileBacked()) throw std::runtime_error(" attempt to update non-file backed workspace"); filename = bc->getFileIO()->getFileName(); } //----------------------------------------------------------------------------------------------------- // create or open WS group and put there additional information about WS and // its dimensions int nDims = static_cast<int>(nd); bool data_exist; auto file = file_holder_type(MDBoxFlatTree::createOrOpenMDWSgroup( filename, nDims, MDE::getTypeName(), false, data_exist)); // Save each NEW ExperimentInfo to a spot in the file MDBoxFlatTree::saveExperimentInfos(file.get(), ws); if (!update || !data_exist) { MDBoxFlatTree::saveWSGenericInfo(file.get(), ws); } file->closeGroup(); file->close(); MDBoxFlatTree BoxFlatStruct; //----------------------------------------------------------------------------------------------------- if (update) // the workspace is already file backed; { // remove all boxes from the DiskBuffer. DB will calculate boxes positions // on HDD. bc->getFileIO()->flushCache(); // flatten the box structure; this will remember boxes file positions in the // box structure BoxFlatStruct.initFlatStructure(ws, filename); } else // not file backed; { // the boxes file positions are unknown and we need to calculate it. BoxFlatStruct.initFlatStructure(ws, filename); // create saver class auto Saver = boost::shared_ptr<API::IBoxControllerIO>( new DataObjects::BoxControllerNeXusIO(bc.get())); Saver->setDataType(sizeof(coord_t), MDE::getTypeName()); if (MakeFileBacked) { // store saver with box controller bc->setFileBacked(Saver, filename); // get access to boxes array std::vector<API::IMDNode *> &boxes = BoxFlatStruct.getBoxes(); // calculate the position of the boxes on file, indicating to make them // saveable and that the boxes were not saved. BoxFlatStruct.setBoxesFilePositions(true); prog->resetNumSteps(boxes.size(), 0.06, 0.90); for (auto &boxe : boxes) { auto saveableTag = boxe->getISaveable(); if (saveableTag) // only boxes can be saveable { // do not spend time on empty boxes if (boxe->getDataInMemorySize() == 0) continue; // save boxes directly using the boxes file postion, precalculated in // boxFlatStructure. saveableTag->save(); // remove boxes data from memory. This will actually correctly set the // tag indicatin that data were not loaded. saveableTag->clearDataFromMemory(); // put boxes into write buffer wich will save them when necessary // Saver->toWrite(saveTag); prog->report("Saving Box"); } } // remove everything from diskBuffer; (not sure if it really necessary // but just in case , should not make any harm) Saver->flushCache(); // drop NeXus on HDD (not sure if it really necessary but just in case ) Saver->flushData(); } else // just save data, and finish with it { Saver->openFile(filename, "w"); BoxFlatStruct.setBoxesFilePositions(false); std::vector<API::IMDNode *> &boxes = BoxFlatStruct.getBoxes(); std::vector<uint64_t> &eventIndex = BoxFlatStruct.getEventIndex(); prog->resetNumSteps(boxes.size(), 0.06, 0.90); for (size_t i = 0; i < boxes.size(); i++) { if (eventIndex[2 * i + 1] == 0) continue; boxes[i]->saveAt(Saver.get(), eventIndex[2 * i]); prog->report("Saving Box"); } Saver->closeFile(); } } // -------------- Save Box Structure ------------------------------------- // OK, we've filled these big arrays of data representing flat box structrre. // Save them. progress(0.91, "Writing Box Data"); prog->resetNumSteps(8, 0.92, 1.00); // Save box structure; BoxFlatStruct.saveBoxStructure(filename); delete prog; ws->setFileNeedsUpdating(false); }