+++ /dev/null
-/*
- * Copyright (c) 2013 Cisco Systems, Inc. and others. All rights reserved.
- *
- * This program and the accompanying materials are made available under the
- * terms of the Eclipse Public License v1.0 which accompanies this distribution,
- * and is available at http://www.eclipse.org/legal/epl-v10.html
- */
-package org.opendaylight.controller.config.persist.storage.file.xml.model;
-
-import com.google.common.base.Optional;
-import com.google.common.collect.Iterables;
-import com.google.common.collect.Lists;
-import com.google.common.io.Files;
-import java.io.File;
-import java.io.IOException;
-import java.nio.charset.StandardCharsets;
-import java.util.List;
-import javax.xml.bind.JAXBContext;
-import javax.xml.bind.JAXBException;
-import javax.xml.bind.Marshaller;
-import javax.xml.bind.Unmarshaller;
-import javax.xml.bind.annotation.XmlElement;
-import javax.xml.bind.annotation.XmlElementWrapper;
-import javax.xml.bind.annotation.XmlRootElement;
-import javax.xml.stream.XMLInputFactory;
-import javax.xml.stream.XMLStreamException;
-import javax.xml.stream.XMLStreamReader;
-import javax.xml.transform.stream.StreamSource;
-import org.apache.commons.lang3.StringUtils;
-
-@XmlRootElement(name = "persisted-snapshots")
-public final class Config {
-
- private List<ConfigSnapshot> snapshots;
-
- Config(final List<ConfigSnapshot> snapshots) {
- this.snapshots = snapshots;
- }
-
- public Config() {
- this.snapshots = Lists.newArrayList();
- }
-
- @XmlElement(name = "snapshot")
- @XmlElementWrapper(name = "snapshots")
- public List<ConfigSnapshot> getSnapshots() {
- return snapshots;
- }
-
- public void setSnapshots(final List<ConfigSnapshot> snapshots) {
- this.snapshots = snapshots;
- }
-
- public void toXml(final File to) {
- try {
-
- // TODO Moxy has to be used instead of default jaxb impl due to a bug
- // default implementation has a bug that prevents from serializing xml in a string
- JAXBContext jaxbContext = org.eclipse.persistence.jaxb.JAXBContextFactory.createContext(new Class[]{Config.class}, null);
-
- Marshaller marshaller = jaxbContext.createMarshaller();
-
- marshaller.setProperty(Marshaller.JAXB_FORMATTED_OUTPUT, Boolean.TRUE);
-
- marshaller.marshal(this, to);
- } catch (final JAXBException e) {
- throw new PersistException("Unable to persist configuration", e);
- }
- }
-
- public static Config fromXml(final File from) {
- if(isEmpty(from)) {
- return new Config();
- }
-
- try {
- JAXBContext jaxbContext = JAXBContext.newInstance(Config.class);
- Unmarshaller um = jaxbContext.createUnmarshaller();
- XMLInputFactory xif = XMLInputFactory.newFactory();
- xif.setProperty(XMLInputFactory.IS_SUPPORTING_EXTERNAL_ENTITIES, false);
- xif.setProperty(XMLInputFactory.SUPPORT_DTD, false);
- XMLStreamReader xsr = xif.createXMLStreamReader(new StreamSource(from));
- return (Config) um.unmarshal(xsr);
- } catch (JAXBException | XMLStreamException e) {
- throw new PersistException("Unable to restore configuration", e);
- }
- }
-
- private static boolean isEmpty(final File from) {
- return from.length() == 0 || isBlank(from);
- }
-
- private static boolean isBlank(final File from) {
- try {
- return StringUtils.isBlank(Files.toString(from, StandardCharsets.UTF_8));
- } catch (final IOException e) {
- throw new IllegalStateException("Unexpected error reading file" + from, e);
- }
- }
-
- public Optional<ConfigSnapshot> getLastSnapshot() {
- ConfigSnapshot last = Iterables.getLast(snapshots, null);
- return last == null ? Optional.<ConfigSnapshot>absent() : Optional.of(last);
- }
-
- public void addConfigSnapshot(final ConfigSnapshot snap, final int numberOfStoredBackups) {
- if (shouldReplaceLast(numberOfStoredBackups) && !snapshots.isEmpty()) {
- snapshots.remove(0);
- }
- snapshots.add(snap);
- }
-
- private boolean shouldReplaceLast(final int numberOfStoredBackups) {
- return numberOfStoredBackups == snapshots.size();
- }
-}