netconf/config-netconf-connector/src/main/java/org/opendaylight/netconf/confignetconfconnector/operations/DiscardChanges.java

   1 /*
   2  * Copyright (c) 2013 Cisco Systems, Inc. and others.  All rights reserved.
   3  *
   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
   7  */
   8
   9 package org.opendaylight.netconf.confignetconfconnector.operations;
  10
  11 import com.google.common.base.Optional;
  12 import java.util.HashMap;
  13 import java.util.Map;
  14 import org.opendaylight.controller.config.facade.xml.ConfigSubsystemFacade;
  15 import org.opendaylight.controller.config.facade.xml.Datastore;
  16 import org.opendaylight.controller.config.util.xml.DocumentedException;
  17 import org.opendaylight.controller.config.util.xml.DocumentedException.ErrorSeverity;
  18 import org.opendaylight.controller.config.util.xml.DocumentedException.ErrorTag;
  19 import org.opendaylight.controller.config.util.xml.DocumentedException.ErrorType;
  20 import org.opendaylight.controller.config.util.xml.XmlElement;
  21 import org.opendaylight.controller.config.util.xml.XmlUtil;
  22 import org.opendaylight.netconf.api.xml.XmlNetconfConstants;
  23 import org.slf4j.Logger;
  24 import org.slf4j.LoggerFactory;
  25 import org.w3c.dom.Document;
  26 import org.w3c.dom.Element;
  27
  28
  29 public class DiscardChanges extends AbstractConfigNetconfOperation {
  30
  31     public static final String DISCARD = "discard-changes";
  32
  33     private static final Logger LOG = LoggerFactory.getLogger(DiscardChanges.class);
  34
  35     public DiscardChanges(final ConfigSubsystemFacade configSubsystemFacade,
  36                           final String netconfSessionIdForReporting) {
  37         super(configSubsystemFacade, netconfSessionIdForReporting);
  38     }
  39
  40     private static void fromXml(final XmlElement xml) throws DocumentedException {
  41         xml.checkName(DISCARD);
  42         xml.checkNamespace(XmlNetconfConstants.URN_IETF_PARAMS_XML_NS_NETCONF_BASE_1_0);
  43     }
  44
  45     @Override
  46     protected String getOperationName() {
  47         return DISCARD;
  48     }
  49
  50     @SuppressWarnings("checkstyle:IllegalCatch")
  51     @Override
  52     protected Element handleWithNoSubsequentOperations(final Document document,
  53                                                        final XmlElement xml) throws DocumentedException {
  54         fromXml(xml);
  55         try {
  56             getConfigSubsystemFacade().abortConfiguration();
  57         } catch (final RuntimeException e) {
  58             LOG.warn("Abort failed: ", e);
  59             final Map<String, String> errorInfo = new HashMap<>();
  60             errorInfo
  61                     .put(ErrorTag.OPERATION_FAILED.name(),
  62                             "Abort failed.");
  63             throw new DocumentedException(e.getMessage(), e, ErrorType.APPLICATION, ErrorTag.OPERATION_FAILED,
  64                     ErrorSeverity.ERROR, errorInfo);
  65         }
  66         LOG.trace("Changes discarded successfully from datastore {}", Datastore.candidate);
  67
  68
  69         return XmlUtil.createElement(document, XmlNetconfConstants.OK, Optional.absent());
  70     }
  71 }