2 * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
4 * This program and the accompanying materials are made available under the
5 * terms of the Eclipse Public License v1.0 which accompanies this distribution,
6 * and is available at http://www.eclipse.org/legal/epl-v10.html
8 package org.opendaylight.controller.config.persist.storage.directory.autodetect;
10 import org.opendaylight.controller.config.persist.api.ConfigSnapshotHolder;
11 import org.opendaylight.controller.config.persist.api.Persister;
12 import org.opendaylight.controller.config.persist.storage.directory.DirectoryPersister;
13 import org.opendaylight.controller.config.persist.storage.directory.xml.XmlDirectoryPersister;
14 import org.slf4j.Logger;
15 import org.slf4j.LoggerFactory;
17 import javax.xml.bind.JAXBException;
19 import java.io.IOException;
20 import java.util.ArrayList;
21 import java.util.Arrays;
22 import java.util.Collections;
23 import java.util.List;
25 import static com.google.common.base.Preconditions.checkArgument;
27 public class AutodetectDirectoryPersister implements Persister {
28 private static final Logger logger = LoggerFactory.getLogger(AutodetectDirectoryPersister.class);
30 private final File storage;
32 public AutodetectDirectoryPersister(File storage) {
33 checkArgument(storage.exists() && storage.isDirectory(), "Storage directory does not exist: " + storage);
34 this.storage = storage;
38 public void persistConfig(ConfigSnapshotHolder holder) throws IOException {
39 throw new UnsupportedOperationException("This adapter is read only. Please set readonly=true on " + getClass());
43 public List<ConfigSnapshotHolder> loadLastConfigs() throws IOException {
44 File[] filesArray = storage.listFiles();
45 if (filesArray == null || filesArray.length == 0) {
46 return Collections.emptyList();
48 List<File> sortedFiles = new ArrayList<>(Arrays.asList(filesArray));
49 Collections.sort(sortedFiles);
51 // combine all found files
52 logger.debug("Reading files in following order: {}", sortedFiles);
54 List<ConfigSnapshotHolder> result = new ArrayList<>();
55 for (File file : sortedFiles) {
56 logger.trace("Adding file '{}' to combined result", file);
58 FileType fileType = FileType.getFileType(file);
59 logger.trace("File '{}' detected as {} storage", file, fileType);
61 ConfigSnapshotHolder snapshot = loadLastConfig(file, fileType);
67 private ConfigSnapshotHolder loadLastConfig(File file, FileType fileType) throws IOException {
70 return DirectoryPersister.loadLastConfig(file);
73 return XmlDirectoryPersister.loadLastConfig(file);
74 } catch (JAXBException e) {
75 logger.warn("Unable to restore configuration snapshot from {}", file, e);
76 throw new IllegalStateException("Unable to restore configuration snapshot from " + file, e);
79 throw new IllegalStateException("Unknown storage type " + fileType);
89 public String toString() {
90 final StringBuffer sb = new StringBuffer("AutodetectDirectoryPersister{");
91 sb.append("storage=").append(storage);