| /* |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| |
| package com.epam.datalab.backendapi.core.response.handlers.dao; |
| |
| import com.epam.datalab.backendapi.ProvisioningServiceApplicationConfiguration; |
| import com.epam.datalab.backendapi.core.response.handlers.PersistentFileHandler; |
| import com.epam.datalab.exceptions.DatalabException; |
| import com.epam.datalab.util.FileUtils; |
| import com.fasterxml.jackson.databind.ObjectMapper; |
| import com.google.inject.Inject; |
| import com.google.inject.Singleton; |
| import lombok.extern.slf4j.Slf4j; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.nio.file.Files; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| import java.nio.file.StandardOpenOption; |
| import java.util.Collections; |
| import java.util.List; |
| import java.util.Optional; |
| import java.util.stream.Stream; |
| |
| import static java.util.stream.Collectors.toList; |
| |
| @Singleton |
| @Slf4j |
| public class FileSystemCallbackHandlerDao implements CallbackHandlerDao { |
| |
| @Inject |
| private ProvisioningServiceApplicationConfiguration configuration; |
| @Inject |
| private ObjectMapper mapper; |
| |
| @Override |
| public void upsert(PersistentFileHandler handlerCallback) { |
| removeWithUUID(handlerCallback.getHandler().getUUID()); |
| final String fileName = fileName(handlerCallback.getHandler().getId()); |
| final String absolutePath = getAbsolutePath(fileName); |
| saveToFile(handlerCallback, fileName, absolutePath); |
| } |
| |
| @Override |
| public List<PersistentFileHandler> findAll() { |
| try (final Stream<Path> pathStream = Files.list(Paths.get(configuration.getHandlerDirectory()))) { |
| return pathStream.map(this::toPersistentFileHandler) |
| .filter(Optional::isPresent) |
| .map(Optional::get) |
| .collect(toList()); |
| } catch (IOException e) { |
| log.error("Can not restore handlers due to: {}", e.getMessage(), e); |
| } |
| return Collections.emptyList(); |
| } |
| |
| @Override |
| public void remove(String handlerId) { |
| try { |
| Files.delete(Paths.get(getAbsolutePath(fileName(handlerId)))); |
| } catch (Exception e) { |
| log.error("Can not remove handler {} due to: {}", handlerId, e.getMessage(), e); |
| throw new DatalabException("Can not remove handler " + handlerId + " due to: " + e.getMessage()); |
| } |
| } |
| |
| private void removeWithUUID(String uuid) { |
| try (final Stream<Path> pathStream = Files.list(Paths.get(configuration.getHandlerDirectory()))) { |
| pathStream.map(Path::toString) |
| .filter(path -> path.contains(uuid)) |
| .findAny() |
| .ifPresent(FileUtils::deleteFile); |
| } catch (IOException e) { |
| log.error("Problem occurred with accessing directory {} due to: {}", configuration.getHandlerDirectory(), |
| e.getLocalizedMessage(), e); |
| } |
| } |
| |
| private String getAbsolutePath(String fileName) { |
| return configuration.getHandlerDirectory() + File.separator + fileName; |
| } |
| |
| private void saveToFile(PersistentFileHandler handlerCallback, String fileName, String absolutePath) { |
| try { |
| log.trace("Persisting callback handler to file {}", absolutePath); |
| Files.write(Paths.get(absolutePath), mapper.writeValueAsBytes(handlerCallback), StandardOpenOption.CREATE); |
| } catch (Exception e) { |
| log.warn("Can not persist file handler {} due to {}", fileName, e.getMessage(), e); |
| } |
| } |
| |
| private String fileName(String handlerId) { |
| return handlerId + ".json"; |
| } |
| |
| private Optional<PersistentFileHandler> toPersistentFileHandler(Path path) { |
| try { |
| return Optional.of(mapper.readValue(path.toFile(), PersistentFileHandler.class)); |
| } catch (Exception e) { |
| log.warn("Can not deserialize file handler from file: {}", path.toString(), e); |
| } |
| return Optional.empty(); |
| } |
| } |