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 org.opendaylight.controller.config.util.ConfigRegistryClient;
  12 import org.opendaylight.controller.netconf.api.NetconfDocumentedException;
  13 import org.opendaylight.controller.netconf.api.NetconfDocumentedException.ErrorSeverity;
  14 import org.opendaylight.controller.netconf.api.NetconfDocumentedException.ErrorTag;
  15 import org.opendaylight.controller.netconf.api.NetconfDocumentedException.ErrorType;
  16 import org.opendaylight.controller.netconf.confignetconfconnector.transactions.TransactionProvider;
  17 import org.opendaylight.controller.netconf.util.xml.XmlElement;
  18 import org.opendaylight.controller.netconf.util.xml.XmlNetconfConstants;
  19 import org.slf4j.Logger;
  20 import org.slf4j.LoggerFactory;
  21 import org.w3c.dom.Document;
  22 import org.w3c.dom.Element;
  23
  24 import java.util.HashMap;
  25 import java.util.Map;
  26
  27 public class DiscardChanges extends AbstractConfigNetconfOperation {
  28
  29     public static final String DISCARD = "discard-changes";
  30
  31     private static final Logger logger = LoggerFactory.getLogger(DiscardChanges.class);
  32
  33     private final TransactionProvider transactionProvider;
  34
  35     public DiscardChanges(final TransactionProvider transactionProvider, ConfigRegistryClient configRegistryClient,
  36             String netconfSessionIdForReporting) {
  37         super(configRegistryClient, netconfSessionIdForReporting);
  38         this.transactionProvider = transactionProvider;
  39     }
  40
  41     private static void fromXml(XmlElement xml) {
  42         xml.checkName(DISCARD);
  43         xml.checkNamespace(XmlNetconfConstants.URN_IETF_PARAMS_XML_NS_NETCONF_BASE_1_0);
  44     }
  45
  46     @Override
  47     protected String getOperationName() {
  48         return DISCARD;
  49     }
  50
  51     @Override
  52     protected Element handle(Document document, XmlElement xml) throws NetconfDocumentedException {
  53         try {
  54             fromXml(xml);
  55         } catch (final IllegalArgumentException e) {
  56             //FIXME where can IllegalStateException  be thrown?
  57             logger.warn("Rpc error: {}", ErrorTag.bad_attribute, e);
  58             final Map<String, String> errorInfo = new HashMap<>();
  59             errorInfo.put(ErrorTag.bad_attribute.name(), e.getMessage());
  60             throw new NetconfDocumentedException(e.getMessage(), e, ErrorType.rpc, ErrorTag.bad_attribute,
  61                     ErrorSeverity.error, errorInfo);
  62         }
  63
  64         try {
  65             this.transactionProvider.abortTransaction();
  66         } catch (final IllegalStateException e) {
  67             //FIXME where can IllegalStateException  be thrown?
  68             logger.warn("Abort failed: ", e);
  69             final Map<String, String> errorInfo = new HashMap<>();
  70             errorInfo
  71                     .put(ErrorTag.operation_failed.name(),
  72                             "Operation failed. Use 'get-config' or 'edit-config' before triggering 'discard-changes' operation");
  73             throw new NetconfDocumentedException(e.getMessage(), e, ErrorType.application, ErrorTag.operation_failed,
  74                     ErrorSeverity.error, errorInfo);
  75         }
  76         logger.trace("Changes discarded successfully from datastore {}", Datastore.candidate);
  77
  78         return document.createElement(XmlNetconfConstants.OK);
  79     }
  80 }