opendaylight/netconf/config-netconf-connector/src/main/java/org/opendaylight/controller/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.controller.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.controller.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, final String netconfSessionIdForReporting) {
  36         super(configSubsystemFacade, netconfSessionIdForReporting);
  37     }
  38
  39     private static void fromXml(XmlElement xml) throws DocumentedException {
  40         xml.checkName(DISCARD);
  41         xml.checkNamespace(XmlNetconfConstants.URN_IETF_PARAMS_XML_NS_NETCONF_BASE_1_0);
  42     }
  43
  44     @Override
  45     protected String getOperationName() {
  46         return DISCARD;
  47     }
  48
  49     @Override
  50     protected Element handleWithNoSubsequentOperations(Document document, XmlElement xml) throws DocumentedException {
  51         fromXml(xml);
  52         try {
  53             getConfigSubsystemFacade().abortConfiguration();
  54         } catch (final RuntimeException e) {
  55             LOG.warn("Abort failed: ", e);
  56             final Map<String, String> errorInfo = new HashMap<>();
  57             errorInfo
  58                     .put(ErrorTag.operation_failed.name(),
  59                             "Abort failed.");
  60             throw new DocumentedException(e.getMessage(), e, ErrorType.application, ErrorTag.operation_failed,
  61                     ErrorSeverity.error, errorInfo);
  62         }
  63         LOG.trace("Changes discarded successfully from datastore {}", Datastore.candidate);
  64
  65
  66         return XmlUtil.createElement(document, XmlNetconfConstants.OK, Optional.<String>absent());
  67     }
  68 }