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.xml;
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.file.xml.model.ConfigSnapshot;
13 import org.slf4j.Logger;
14 import org.slf4j.LoggerFactory;
16 import javax.xml.bind.JAXBContext;
17 import javax.xml.bind.JAXBException;
18 import javax.xml.bind.Unmarshaller;
20 import java.io.IOException;
21 import java.util.ArrayList;
22 import java.util.Arrays;
23 import java.util.Collections;
24 import java.util.List;
25 import java.util.SortedSet;
27 import static com.google.common.base.Preconditions.checkArgument;
29 public class XmlDirectoryPersister implements Persister {
30 private static final Logger logger = LoggerFactory.getLogger(XmlDirectoryPersister.class);
32 private final File storage;
34 public XmlDirectoryPersister(File storage) {
35 checkArgument(storage.exists() && storage.isDirectory(), "Storage directory does not exist: " + storage);
36 this.storage = storage;
40 public void persistConfig(ConfigSnapshotHolder holder) throws IOException {
41 throw new UnsupportedOperationException("This adapter is read only. Please set readonly=true on " + getClass());
45 public List<ConfigSnapshotHolder> loadLastConfigs() throws IOException {
46 File[] filesArray = storage.listFiles();
47 if (filesArray == null || filesArray.length == 0) {
48 return Collections.emptyList();
50 List<File> sortedFiles = new ArrayList<>(Arrays.asList(filesArray));
51 Collections.sort(sortedFiles);
52 // combine all found files
53 logger.debug("Reading files in following order: {}", sortedFiles);
55 List<ConfigSnapshotHolder> result = new ArrayList<>();
56 for (File file : sortedFiles) {
57 logger.trace("Adding file '{}' to combined result", file);
58 ConfigSnapshotHolder h = fromXmlSnapshot(file);
64 private ConfigSnapshotHolder fromXmlSnapshot(File file) {
66 JAXBContext jaxbContext = JAXBContext.newInstance(ConfigSnapshot.class);
67 Unmarshaller um = jaxbContext.createUnmarshaller();
69 return asHolder((ConfigSnapshot) um.unmarshal(file));
70 } catch (JAXBException e) {
71 logger.warn("Unable to restore configuration snapshot from {}", file, e);
72 throw new IllegalStateException("Unable to restore configuration snapshot from " + file, e);
76 private ConfigSnapshotHolder asHolder(final ConfigSnapshot unmarshalled) {
77 return new ConfigSnapshotHolder() {
79 public String getConfigSnapshot() {
80 return unmarshalled.getConfigSnapshot();
84 public SortedSet<String> getCapabilities() {
85 return unmarshalled.getCapabilities();
89 public String toString() {
90 return unmarshalled.toString();
102 public String toString() {
103 final StringBuffer sb = new StringBuffer("XmlDirectoryPersister{");
104 sb.append("storage=").append(storage);
106 return sb.toString();