opendaylight/md-sal/sal-netconf-connector/src/main/java/org/opendaylight/controller/sal/connect/netconf/sal/tx/NetconfDeviceReadOnlyTx.java

   1 /*
   2  * Copyright (c) 2014 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 package org.opendaylight.controller.sal.connect.netconf.sal.tx;
   9
  10 import static org.opendaylight.controller.sal.connect.netconf.util.NetconfMessageTransformUtil.CONFIG_SOURCE_RUNNING;
  11 import static org.opendaylight.controller.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_DATA_QNAME;
  12 import static org.opendaylight.controller.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_GET_CONFIG_QNAME;
  13 import static org.opendaylight.controller.sal.connect.netconf.util.NetconfMessageTransformUtil.NETCONF_GET_QNAME;
  14 import static org.opendaylight.controller.sal.connect.netconf.util.NetconfMessageTransformUtil.toFilterStructure;
  15
  16 import com.google.common.base.Function;
  17 import com.google.common.base.Optional;
  18 import com.google.common.base.Preconditions;
  19 import com.google.common.util.concurrent.CheckedFuture;
  20 import com.google.common.util.concurrent.Futures;
  21 import com.google.common.util.concurrent.ListenableFuture;
  22 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  23 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  24 import org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizationException;
  25 import org.opendaylight.controller.md.sal.common.impl.util.compat.DataNormalizer;
  26 import org.opendaylight.controller.md.sal.dom.api.DOMDataReadOnlyTransaction;
  27 import org.opendaylight.controller.sal.connect.netconf.util.NetconfMessageTransformUtil;
  28 import org.opendaylight.controller.sal.connect.util.RemoteDeviceId;
  29 import org.opendaylight.controller.sal.core.api.RpcImplementation;
  30 import org.opendaylight.yangtools.util.concurrent.MappingCheckedFuture;
  31 import org.opendaylight.yangtools.yang.common.RpcResult;
  32 import org.opendaylight.yangtools.yang.data.api.CompositeNode;
  33 import org.opendaylight.yangtools.yang.data.api.Node;
  34 import org.opendaylight.yangtools.yang.data.api.SimpleNode;
  35 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  36 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  37 import org.slf4j.Logger;
  38 import org.slf4j.LoggerFactory;
  39
  40
  41 public final class NetconfDeviceReadOnlyTx implements DOMDataReadOnlyTransaction {
  42
  43     private static final Logger LOG  = LoggerFactory.getLogger(NetconfDeviceReadOnlyTx.class);
  44
  45     private final RpcImplementation rpc;
  46     private final DataNormalizer normalizer;
  47     private final RemoteDeviceId id;
  48
  49     public NetconfDeviceReadOnlyTx(final RpcImplementation rpc, final DataNormalizer normalizer, final RemoteDeviceId id) {
  50         this.rpc = rpc;
  51         this.normalizer = normalizer;
  52         this.id = id;
  53     }
  54
  55     private CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> readConfigurationData(
  56             final YangInstanceIdentifier path) {
  57         final ListenableFuture<RpcResult<CompositeNode>> future = rpc.invokeRpc(NETCONF_GET_CONFIG_QNAME,
  58                 NetconfMessageTransformUtil.wrap(NETCONF_GET_CONFIG_QNAME, CONFIG_SOURCE_RUNNING, toFilterStructure(path)));
  59
  60         ListenableFuture<Optional<NormalizedNode<?, ?>>> transformedFuture = Futures.transform(future, new Function<RpcResult<CompositeNode>, Optional<NormalizedNode<?, ?>>>() {
  61             @Override
  62             public Optional<NormalizedNode<?, ?>> apply(final RpcResult<CompositeNode> result) {
  63                 checkReadSuccess(result, path);
  64
  65                 final CompositeNode data = result.getResult().getFirstCompositeByName(NETCONF_DATA_QNAME);
  66                 final CompositeNode node = (CompositeNode) findNode(data, path);
  67
  68                 return data == null ?
  69                         Optional.<NormalizedNode<?, ?>>absent() :
  70                         transform(path, node);
  71             }
  72         });
  73
  74         return MappingCheckedFuture.create(transformedFuture, ReadFailedException.MAPPER);
  75     }
  76
  77     private void checkReadSuccess(final RpcResult<CompositeNode> result, final YangInstanceIdentifier path) {
  78         try {
  79             Preconditions.checkArgument(result.isSuccessful(), "%s: Unable to read data: %s, errors: %s", id, path, result.getErrors());
  80         } catch (IllegalArgumentException e) {
  81             LOG.warn("{}: Unable to read data: {}, errors: {}", id, path, result.getErrors());
  82             throw e;
  83         }
  84     }
  85
  86     private Optional<NormalizedNode<?, ?>> transform(final YangInstanceIdentifier path, final CompositeNode node) {
  87         if(node == null) {
  88             return Optional.absent();
  89         }
  90         try {
  91             return Optional.<NormalizedNode<?, ?>>of(normalizer.toNormalized(path, node).getValue());
  92         } catch (final Exception e) {
  93             LOG.error("{}: Unable to normalize data for {}, data: {}", id, path, node, e);
  94             throw e;
  95         }
  96     }
  97
  98     private CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> readOperationalData(
  99             final YangInstanceIdentifier path) {
 100         final ListenableFuture<RpcResult<CompositeNode>> future = rpc.invokeRpc(NETCONF_GET_QNAME, NetconfMessageTransformUtil.wrap(NETCONF_GET_QNAME, toFilterStructure(path)));
 101
 102         ListenableFuture<Optional<NormalizedNode<?, ?>>> transformedFuture = Futures.transform(future, new Function<RpcResult<CompositeNode>, Optional<NormalizedNode<?, ?>>>() {
 103             @Override
 104             public Optional<NormalizedNode<?, ?>> apply(final RpcResult<CompositeNode> result) {
 105                 checkReadSuccess(result, path);
 106
 107                 final CompositeNode data = result.getResult().getFirstCompositeByName(NETCONF_DATA_QNAME);
 108                 final CompositeNode node = (CompositeNode) findNode(data, path);
 109
 110                 return data == null ?
 111                         Optional.<NormalizedNode<?, ?>>absent() :
 112                         transform(path, node);
 113             }
 114         });
 115
 116         return MappingCheckedFuture.create(transformedFuture, ReadFailedException.MAPPER);
 117     }
 118
 119     private static Node<?> findNode(final CompositeNode node, final YangInstanceIdentifier identifier) {
 120
 121         Node<?> current = node;
 122         for (final YangInstanceIdentifier.PathArgument arg : identifier.getPathArguments()) {
 123             if (current instanceof SimpleNode<?>) {
 124                 return null;
 125             } else if (current instanceof CompositeNode) {
 126                 final CompositeNode currentComposite = (CompositeNode) current;
 127
 128                 current = currentComposite.getFirstCompositeByName(arg.getNodeType());
 129                 if (current == null) {
 130                     current = currentComposite.getFirstCompositeByName(arg.getNodeType().withoutRevision());
 131                 }
 132                 if (current == null) {
 133                     current = currentComposite.getFirstSimpleByName(arg.getNodeType());
 134                 }
 135                 if (current == null) {
 136                     current = currentComposite.getFirstSimpleByName(arg.getNodeType().withoutRevision());
 137                 }
 138                 if (current == null) {
 139                     return null;
 140                 }
 141             }
 142         }
 143         return current;
 144     }
 145
 146     @Override
 147     public void close() {
 148         // NOOP
 149     }
 150
 151     @Override
 152     public CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> read(
 153             final LogicalDatastoreType store, final YangInstanceIdentifier path) {
 154         final YangInstanceIdentifier legacyPath = toLegacyPath(normalizer, path, id);
 155
 156         switch (store) {
 157             case CONFIGURATION : {
 158                 return readConfigurationData(legacyPath);
 159             }
 160             case OPERATIONAL : {
 161                 return readOperationalData(legacyPath);
 162             }
 163         }
 164
 165         throw new IllegalArgumentException(String.format("%s, Cannot read data %s for %s datastore, unknown datastore type", id, path, store));
 166     }
 167
 168     static YangInstanceIdentifier toLegacyPath(final DataNormalizer normalizer, final YangInstanceIdentifier path, final RemoteDeviceId id) {
 169         try {
 170             return normalizer.toLegacy(path);
 171         } catch (final DataNormalizationException e) {
 172             throw new IllegalArgumentException(id + ": Cannot normalize path " + path, e);
 173         }
 174     }
 175
 176     @Override
 177     public Object getIdentifier() {
 178         return this;
 179     }
 180 }