opendaylight/netconf/netconf-impl/src/main/java/org/opendaylight/controller/netconf/impl/mapping/operations/DefaultCommit.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.impl.mapping.operations;
  10
  11 import com.google.common.base.Preconditions;
  12 import org.opendaylight.controller.netconf.api.NetconfDocumentedException;
  13 import org.opendaylight.controller.netconf.impl.osgi.NetconfOperationRouter;
  14 import org.opendaylight.controller.netconf.impl.DefaultCommitNotificationProducer;
  15 import org.opendaylight.controller.netconf.impl.mapping.CapabilityProvider;
  16 import org.opendaylight.controller.netconf.mapping.api.HandlingPriority;
  17 import org.opendaylight.controller.netconf.mapping.api.NetconfOperationChainedExecution;
  18 import org.opendaylight.controller.netconf.util.mapping.AbstractNetconfOperation;
  19 import org.opendaylight.controller.netconf.util.xml.XmlElement;
  20 import org.opendaylight.controller.netconf.util.xml.XmlNetconfConstants;
  21 import org.opendaylight.controller.netconf.util.xml.XmlUtil;
  22 import org.slf4j.Logger;
  23 import org.slf4j.LoggerFactory;
  24 import org.w3c.dom.Document;
  25 import org.w3c.dom.Element;
  26
  27 import java.io.InputStream;
  28
  29 public class DefaultCommit extends AbstractNetconfOperation {
  30
  31     private static final Logger logger = LoggerFactory.getLogger(DefaultCommit.class);
  32
  33     private static final String NOTIFY_ATTR = "notify";
  34
  35     private final DefaultCommitNotificationProducer notificationProducer;
  36     private final CapabilityProvider cap;
  37     private final NetconfOperationRouter operationRouter;
  38
  39     public DefaultCommit(DefaultCommitNotificationProducer notifier, CapabilityProvider cap,
  40                          String netconfSessionIdForReporting, NetconfOperationRouter netconfOperationRouter) {
  41         super(netconfSessionIdForReporting);
  42         this.notificationProducer = notifier;
  43         this.cap = cap;
  44         this.operationRouter = netconfOperationRouter;
  45         this.getConfigMessage = loadGetConfigMessage();
  46     }
  47
  48     private final Document getConfigMessage;
  49     public static final String GET_CONFIG_CANDIDATE_XML_LOCATION = "/getConfig_candidate.xml";
  50
  51     private static Document loadGetConfigMessage() {
  52         try (InputStream asStream = DefaultCommit.class.getResourceAsStream(GET_CONFIG_CANDIDATE_XML_LOCATION)) {
  53             return XmlUtil.readXmlToDocument(asStream);
  54         } catch (Exception e) {
  55             throw new IllegalStateException("Unable to load getConfig message for notifications from "
  56                     + GET_CONFIG_CANDIDATE_XML_LOCATION);
  57         }
  58     }
  59
  60     @Override
  61     protected String getOperationName() {
  62         return XmlNetconfConstants.COMMIT;
  63     }
  64
  65     @Override
  66     public Document handle(Document requestMessage, NetconfOperationChainedExecution subsequentOperation) throws NetconfDocumentedException {
  67         Preconditions.checkArgument(!subsequentOperation.isExecutionTermination(),
  68                 "Subsequent netconf operation expected by %s", this);
  69
  70         if (isCommitWithoutNotification(requestMessage)) {
  71             logger.debug("Skipping commit notification");
  72         } else {
  73             // Send commit notification if commit was not issued by persister
  74             removePersisterAttributes(requestMessage);
  75             Element cfgSnapshot = getConfigSnapshot(operationRouter);
  76             logger.debug("Config snapshot retrieved successfully {}", cfgSnapshot);
  77             notificationProducer.sendCommitNotification("ok", cfgSnapshot, cap.getCapabilities());
  78         }
  79
  80         return subsequentOperation.execute(requestMessage);
  81     }
  82
  83     @Override
  84     protected Element handle(Document document, XmlElement message, NetconfOperationChainedExecution subsequentOperation) throws NetconfDocumentedException {
  85         throw new UnsupportedOperationException("Never gets called");
  86     }
  87
  88     @Override
  89     protected HandlingPriority getHandlingPriority() {
  90         return HandlingPriority.HANDLE_WITH_DEFAULT_PRIORITY.increasePriority(1);
  91     }
  92
  93     private void removePersisterAttributes(Document message) {
  94         message.getDocumentElement().removeAttribute(NOTIFY_ATTR);
  95     }
  96
  97     private boolean isCommitWithoutNotification(Document message) {
  98         XmlElement xmlElement = null;
  99         try {
 100             xmlElement = XmlElement.fromDomElementWithExpected(message.getDocumentElement(),
 101                     XmlNetconfConstants.RPC_KEY, XmlNetconfConstants.URN_IETF_PARAMS_XML_NS_NETCONF_BASE_1_0);
 102         } catch (NetconfDocumentedException e) {
 103             logger.trace("Commit operation is not valid due to  {}",e);
 104             return false;
 105         }
 106
 107         String attr = xmlElement.getAttribute(NOTIFY_ATTR);
 108
 109         if (attr == null || attr.equals("")){
 110             return false;
 111         } else if (attr.equals(Boolean.toString(false))) {
 112             logger.debug("Commit operation received with notify=false attribute {}", message);
 113             return true;
 114         } else {
 115             return false;
 116         }
 117     }
 118
 119     private Element getConfigSnapshot(NetconfOperationRouter opRouter) throws NetconfDocumentedException {
 120         final Document responseDocument = opRouter.onNetconfMessage(
 121                 getConfigMessage, null);
 122
 123         XmlElement dataElement;
 124         XmlElement xmlElement = XmlElement.fromDomElementWithExpected(responseDocument.getDocumentElement(),
 125                 XmlNetconfConstants.RPC_REPLY_KEY, XmlNetconfConstants.URN_IETF_PARAMS_XML_NS_NETCONF_BASE_1_0);
 126         dataElement = xmlElement.getOnlyChildElement(XmlNetconfConstants.DATA_KEY);
 127         return dataElement.getDomElement();
 128     }
 129
 130 }