2 * Copyright (c) 2015 Cisco Systems, Inc. and others. All rights reserved.
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
9 package org.opendaylight.netconf.mdsal.connector.ops.get;
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.netconf.api.DocumentedException;
16 import org.opendaylight.netconf.api.DocumentedException.ErrorSeverity;
17 import org.opendaylight.netconf.api.DocumentedException.ErrorTag;
18 import org.opendaylight.netconf.api.DocumentedException.ErrorType;
19 import org.opendaylight.netconf.api.xml.XmlElement;
20 import org.opendaylight.netconf.api.xml.XmlNetconfConstants;
21 import org.opendaylight.netconf.api.xml.XmlUtil;
22 import org.opendaylight.netconf.mdsal.connector.CurrentSchemaContext;
23 import org.opendaylight.netconf.mdsal.connector.TransactionProvider;
24 import org.opendaylight.netconf.mdsal.connector.ops.Datastore;
25 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
26 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
27 import org.slf4j.Logger;
28 import org.slf4j.LoggerFactory;
29 import org.w3c.dom.Document;
30 import org.w3c.dom.Element;
32 public class Get extends AbstractGet {
34 private static final Logger LOG = LoggerFactory.getLogger(Get.class);
36 private static final String OPERATION_NAME = "get";
37 private final TransactionProvider transactionProvider;
39 public Get(final String netconfSessionIdForReporting, final CurrentSchemaContext schemaContext,
40 final TransactionProvider transactionProvider) {
41 super(netconfSessionIdForReporting, schemaContext);
42 this.transactionProvider = transactionProvider;
46 protected Element handleWithNoSubsequentOperations(final Document document, final XmlElement operationElement)
47 throws DocumentedException {
49 final Optional<YangInstanceIdentifier> dataRootOptional = getDataRootFromFilter(operationElement);
50 if (!dataRootOptional.isPresent()) {
51 return XmlUtil.createElement(document, XmlNetconfConstants.DATA_KEY, Optional.absent());
54 final YangInstanceIdentifier dataRoot = dataRootOptional.get();
56 final DOMDataReadWriteTransaction rwTx = getTransaction(Datastore.running);
58 final Optional<NormalizedNode<?, ?>> normalizedNodeOptional = rwTx.read(
59 LogicalDatastoreType.OPERATIONAL, dataRoot).checkedGet();
60 transactionProvider.abortRunningTransaction(rwTx);
62 if (!normalizedNodeOptional.isPresent()) {
63 return XmlUtil.createElement(document, XmlNetconfConstants.DATA_KEY, Optional.absent());
66 return serializeNodeWithParentStructure(document, dataRoot, normalizedNodeOptional.get());
67 } catch (final ReadFailedException e) {
68 LOG.warn("Unable to read data: {}", dataRoot, e);
69 throw new IllegalStateException("Unable to read data " + dataRoot, e);
73 private DOMDataReadWriteTransaction getTransaction(final Datastore datastore) throws DocumentedException {
74 if (datastore == Datastore.candidate) {
75 return transactionProvider.getOrCreateTransaction();
76 } else if (datastore == Datastore.running) {
77 return transactionProvider.createRunningTransaction();
79 throw new DocumentedException("Incorrect Datastore: ", ErrorType.PROTOCOL, ErrorTag.BAD_ELEMENT,
84 protected String getOperationName() {
85 return OPERATION_NAME;