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 java.util.HashMap;
  12 import java.util.Map;
  13
  14 import org.opendaylight.controller.config.util.ConfigRegistryClient;
  15 import org.opendaylight.controller.netconf.api.NetconfDocumentedException;
  16 import org.opendaylight.controller.netconf.api.NetconfDocumentedException.ErrorSeverity;
  17 import org.opendaylight.controller.netconf.api.NetconfDocumentedException.ErrorTag;
  18 import org.opendaylight.controller.netconf.api.NetconfDocumentedException.ErrorType;
  19 import org.opendaylight.controller.netconf.confignetconfconnector.transactions.TransactionProvider;
  20 import org.opendaylight.controller.netconf.util.xml.XmlElement;
  21 import org.opendaylight.controller.netconf.util.xml.XmlNetconfConstants;
  22 import org.opendaylight.controller.netconf.util.xml.XmlUtil;
  23 import org.slf4j.Logger;
  24 import org.slf4j.LoggerFactory;
  25 import org.w3c.dom.Document;
  26 import org.w3c.dom.Element;
  27
  28 import com.google.common.base.Optional;
  29
  30 public class DiscardChanges extends AbstractConfigNetconfOperation {
  31
  32     public static final String DISCARD = "discard-changes";
  33
  34     private static final Logger logger = LoggerFactory.getLogger(DiscardChanges.class);
  35
  36     private final TransactionProvider transactionProvider;
  37
  38     public DiscardChanges(final TransactionProvider transactionProvider, ConfigRegistryClient configRegistryClient,
  39             String netconfSessionIdForReporting) {
  40         super(configRegistryClient, netconfSessionIdForReporting);
  41         this.transactionProvider = transactionProvider;
  42     }
  43
  44     private static void fromXml(XmlElement xml) {
  45         xml.checkName(DISCARD);
  46         xml.checkNamespace(XmlNetconfConstants.URN_IETF_PARAMS_XML_NS_NETCONF_BASE_1_0);
  47     }
  48
  49     @Override
  50     protected String getOperationName() {
  51         return DISCARD;
  52     }
  53
  54     @Override
  55     protected Element handleWithNoSubsequentOperations(Document document, XmlElement xml) throws NetconfDocumentedException {
  56         try {
  57             fromXml(xml);
  58         } catch (final IllegalArgumentException e) {
  59             //FIXME where can IllegalStateException  be thrown?
  60             logger.warn("Rpc error: {}", ErrorTag.bad_attribute, e);
  61             final Map<String, String> errorInfo = new HashMap<>();
  62             errorInfo.put(ErrorTag.bad_attribute.name(), e.getMessage());
  63             throw new NetconfDocumentedException(e.getMessage(), e, ErrorType.rpc, ErrorTag.bad_attribute,
  64                     ErrorSeverity.error, errorInfo);
  65         }
  66
  67         try {
  68             this.transactionProvider.abortTransaction();
  69         } catch (final IllegalStateException e) {
  70             //FIXME where can IllegalStateException  be thrown?
  71             logger.warn("Abort failed: ", e);
  72             final Map<String, String> errorInfo = new HashMap<>();
  73             errorInfo
  74                     .put(ErrorTag.operation_failed.name(),
  75                             "Operation failed. Use 'get-config' or 'edit-config' before triggering 'discard-changes' operation");
  76             throw new NetconfDocumentedException(e.getMessage(), e, ErrorType.application, ErrorTag.operation_failed,
  77                     ErrorSeverity.error, errorInfo);
  78         }
  79         logger.trace("Changes discarded successfully from datastore {}", Datastore.candidate);
  80
  81         return XmlUtil.createElement(document, XmlNetconfConstants.OK, Optional.<String>absent());
  82     }
  83 }