opendaylight/netconf/mdsal-netconf-connector/src/main/java/org/opendaylight/controller/netconf/mdsal/connector/ops/get/GetConfig.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 com.google.common.base.Preconditions;
  13 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  14 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  15 import org.opendaylight.controller.md.sal.dom.api.DOMDataReadWriteTransaction;
  16 import org.opendaylight.controller.netconf.api.NetconfDocumentedException;
  17 import org.opendaylight.controller.netconf.api.NetconfDocumentedException.ErrorSeverity;
  18 import org.opendaylight.controller.netconf.api.NetconfDocumentedException.ErrorTag;
  19 import org.opendaylight.controller.netconf.api.NetconfDocumentedException.ErrorType;
  20 import org.opendaylight.controller.netconf.mdsal.connector.CurrentSchemaContext;
  21 import org.opendaylight.controller.netconf.mdsal.connector.TransactionProvider;
  22 import org.opendaylight.controller.netconf.mdsal.connector.ops.Datastore;
  23 import org.opendaylight.controller.netconf.util.xml.XmlElement;
  24 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  25 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  26 import org.slf4j.Logger;
  27 import org.slf4j.LoggerFactory;
  28 import org.w3c.dom.Document;
  29 import org.w3c.dom.Element;
  30
  31 public class GetConfig extends AbstractGet {
  32
  33     private static final Logger LOG = LoggerFactory.getLogger(GetConfig.class);
  34
  35     private static final String OPERATION_NAME = "get-config";
  36
  37     private final TransactionProvider transactionProvider;
  38
  39     public GetConfig(final String netconfSessionIdForReporting, final CurrentSchemaContext schemaContext, final TransactionProvider transactionProvider) {
  40         super(netconfSessionIdForReporting, schemaContext);
  41         this.transactionProvider = transactionProvider;
  42     }
  43
  44     @Override
  45     protected Element handleWithNoSubsequentOperations(Document document, XmlElement operationElement) throws NetconfDocumentedException {
  46         GetConfigExecution getConfigExecution = null;
  47         try {
  48             getConfigExecution = GetConfigExecution.fromXml(operationElement, OPERATION_NAME);
  49
  50         } catch (final NetconfDocumentedException e) {
  51             LOG.warn("Get request processing failed on session: {}", getNetconfSessionIdForReporting(), e);
  52             throw e;
  53         }
  54
  55         final YangInstanceIdentifier dataRoot = ROOT;
  56         // Proper exception should be thrown
  57         Preconditions.checkState(getConfigExecution.getDatastore().isPresent(), "Source element missing from request");
  58
  59         DOMDataReadWriteTransaction rwTx = getTransaction(getConfigExecution.getDatastore().get());
  60         try {
  61             final Optional<NormalizedNode<?, ?>> normalizedNodeOptional = rwTx.read(LogicalDatastoreType.CONFIGURATION, dataRoot).checkedGet();
  62             if (getConfigExecution.getDatastore().get() == Datastore.running) {
  63                 transactionProvider.abortRunningTransaction(rwTx);
  64                 rwTx = null;
  65             }
  66             return (Element) transformNormalizedNode(document, normalizedNodeOptional.get(), dataRoot);
  67         } catch (ReadFailedException e) {
  68             LOG.warn("Unable to read data: {}", dataRoot, e);
  69             throw new IllegalStateException("Unable to read data " + dataRoot, e);
  70         }
  71     }
  72
  73     private DOMDataReadWriteTransaction getTransaction(Datastore datastore) throws NetconfDocumentedException{
  74         if (datastore == Datastore.candidate) {
  75             return transactionProvider.getOrCreateTransaction();
  76         } else if (datastore == Datastore.running) {
  77             return transactionProvider.createRunningTransaction();
  78         }
  79         throw new NetconfDocumentedException("Incorrect Datastore: ", ErrorType.protocol, ErrorTag.bad_element, ErrorSeverity.error);
  80     }
  81
  82     @Override
  83     protected String getOperationName() {
  84         return OPERATION_NAME;
  85     }
  86
  87 }