opendaylight/netconf/mdsal-netconf-connector/src/main/java/org/opendaylight/controller/netconf/mdsal/connector/ops/get/Get.java

   1 /*
   2  * Copyright (c) 2015 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.mdsal.connector.ops.get;
  10
  11 import com.google.common.base.Optional;
  12 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  13 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  14 import org.opendaylight.controller.md.sal.dom.api.DOMDataReadWriteTransaction;
  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.mdsal.connector.CurrentSchemaContext;
  20 import org.opendaylight.controller.netconf.mdsal.connector.TransactionProvider;
  21 import org.opendaylight.controller.netconf.mdsal.connector.ops.Datastore;
  22 import org.opendaylight.controller.netconf.util.xml.XmlElement;
  23 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  24 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  25 import org.slf4j.Logger;
  26 import org.slf4j.LoggerFactory;
  27 import org.w3c.dom.Document;
  28 import org.w3c.dom.Element;
  29
  30 public class Get extends AbstractGet {
  31
  32     private static final Logger LOG = LoggerFactory.getLogger(Get.class);
  33
  34     private static final String OPERATION_NAME = "get";
  35
  36     private final TransactionProvider transactionProvider;
  37
  38     public Get(final String netconfSessionIdForReporting, final CurrentSchemaContext schemaContext, final TransactionProvider transactionProvider) {
  39         super(netconfSessionIdForReporting, schemaContext);
  40         this.transactionProvider = transactionProvider;
  41     }
  42
  43     @Override
  44     protected Element handleWithNoSubsequentOperations(Document document, XmlElement operationElement) throws NetconfDocumentedException {
  45
  46         final YangInstanceIdentifier dataRoot = ROOT;
  47         DOMDataReadWriteTransaction rwTx = getTransaction(Datastore.running);
  48         try {
  49             final Optional<NormalizedNode<?, ?>> normalizedNodeOptional = rwTx.read(LogicalDatastoreType.OPERATIONAL, dataRoot).checkedGet();
  50             transactionProvider.abortRunningTransaction(rwTx);
  51             return (Element) transformNormalizedNode(document, normalizedNodeOptional.get(), dataRoot);
  52         } catch (ReadFailedException e) {
  53             LOG.warn("Unable to read data: {}", dataRoot, e);
  54             throw new IllegalStateException("Unable to read data " + dataRoot, e);
  55         }
  56     }
  57
  58     private DOMDataReadWriteTransaction getTransaction(Datastore datastore) throws NetconfDocumentedException{
  59         if (datastore == Datastore.candidate) {
  60             return transactionProvider.getOrCreateTransaction();
  61         } else if (datastore == Datastore.running) {
  62             return transactionProvider.createRunningTransaction();
  63         }
  64         throw new NetconfDocumentedException("Incorrect Datastore: ", ErrorType.protocol, ErrorTag.bad_element, ErrorSeverity.error);
  65     }
  66
  67     @Override
  68     protected String getOperationName() {
  69         return OPERATION_NAME;
  70     }
  71 }