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.controller.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.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.api.xml.XmlNetconfConstants;
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.controller.netconf.util.xml.XmlUtil;
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, final TransactionProvider transactionProvider) {
40 super(netconfSessionIdForReporting, schemaContext);
41 this.transactionProvider = transactionProvider;
45 protected Element handleWithNoSubsequentOperations(Document document, XmlElement operationElement) throws NetconfDocumentedException {
47 final Optional<YangInstanceIdentifier> dataRootOptional = getDataRootFromFilter(operationElement);
48 if (!dataRootOptional.isPresent()) {
49 return XmlUtil.createElement(document, XmlNetconfConstants.DATA_KEY, Optional.<String>absent());
52 final YangInstanceIdentifier dataRoot = dataRootOptional.get();
54 DOMDataReadWriteTransaction rwTx = getTransaction(Datastore.running);
56 final Optional<NormalizedNode<?, ?>> normalizedNodeOptional = rwTx.read(LogicalDatastoreType.OPERATIONAL, dataRoot).checkedGet();
57 transactionProvider.abortRunningTransaction(rwTx);
59 if (!normalizedNodeOptional.isPresent()) {
60 return XmlUtil.createElement(document, XmlNetconfConstants.DATA_KEY, Optional.<String>absent());
63 return serializeNodeWithParentStructure(document, dataRoot, normalizedNodeOptional.get());
64 } catch (ReadFailedException e) {
65 LOG.warn("Unable to read data: {}", dataRoot, e);
66 throw new IllegalStateException("Unable to read data " + dataRoot, e);
70 private DOMDataReadWriteTransaction getTransaction(Datastore datastore) throws NetconfDocumentedException{
71 if (datastore == Datastore.candidate) {
72 return transactionProvider.getOrCreateTransaction();
73 } else if (datastore == Datastore.running) {
74 return transactionProvider.createRunningTransaction();
76 throw new NetconfDocumentedException("Incorrect Datastore: ", ErrorType.protocol, ErrorTag.bad_element, ErrorSeverity.error);
80 protected String getOperationName() {
81 return OPERATION_NAME;