netconf/netconf-topology-singleton/src/main/java/org/opendaylight/netconf/topology/singleton/impl/tx/NetconfReadOnlyTransaction.java

   1 /*
   2  * Copyright (c) 2016 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.netconf.topology.singleton.impl.tx;
  10
  11 import akka.actor.ActorSystem;
  12 import akka.dispatch.OnComplete;
  13 import com.google.common.base.Function;
  14 import com.google.common.base.Optional;
  15 import com.google.common.util.concurrent.CheckedFuture;
  16 import com.google.common.util.concurrent.Futures;
  17 import com.google.common.util.concurrent.SettableFuture;
  18 import javax.annotation.Nullable;
  19 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  20 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  21 import org.opendaylight.controller.md.sal.dom.api.DOMDataReadOnlyTransaction;
  22 import org.opendaylight.netconf.sal.connect.util.RemoteDeviceId;
  23 import org.opendaylight.netconf.topology.singleton.api.NetconfDOMTransaction;
  24 import org.opendaylight.netconf.topology.singleton.messages.NormalizedNodeMessage;
  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 scala.concurrent.Future;
  30
  31 public class NetconfReadOnlyTransaction implements DOMDataReadOnlyTransaction {
  32
  33     private static final Logger LOG = LoggerFactory.getLogger(NetconfReadOnlyTransaction.class);
  34
  35     private final RemoteDeviceId id;
  36     private final NetconfDOMTransaction delegate;
  37     private final ActorSystem actorSystem;
  38
  39     public NetconfReadOnlyTransaction(final RemoteDeviceId id,
  40                                       final ActorSystem actorSystem,
  41                                       final NetconfDOMTransaction delegate) {
  42         this.id = id;
  43         this.delegate = delegate;
  44         this.actorSystem = actorSystem;
  45     }
  46
  47     @Override
  48     public void close() {
  49         //NOOP
  50     }
  51
  52     @Override
  53     public CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> read(final LogicalDatastoreType store,
  54                                                                                    final YangInstanceIdentifier path) {
  55
  56         LOG.trace("{}: Read {} via NETCONF: {}", id, store, path);
  57
  58         final Future<Optional<NormalizedNodeMessage>> future = delegate.read(store, path);
  59         final SettableFuture<Optional<NormalizedNode<?, ?>>> settableFuture = SettableFuture.create();
  60         final CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> checkedFuture;
  61         checkedFuture = Futures.makeChecked(settableFuture, new Function<Exception, ReadFailedException>() {
  62             @Nullable
  63             @Override
  64             public ReadFailedException apply(Exception cause) {
  65                 return new ReadFailedException("Read from transaction failed", cause);
  66             }
  67         });
  68         future.onComplete(new OnComplete<Optional<NormalizedNodeMessage>>() {
  69             @Override
  70             public void onComplete(final Throwable throwable,
  71                                    final Optional<NormalizedNodeMessage> normalizedNodeMessage) throws Throwable {
  72                 if (throwable == null) {
  73                     if (normalizedNodeMessage.isPresent()) {
  74                         settableFuture.set(normalizedNodeMessage.transform(new Function<NormalizedNodeMessage,
  75                                 NormalizedNode<?, ?>>() {
  76
  77                             @Nullable
  78                             @Override
  79                             public NormalizedNode<?, ?> apply(final NormalizedNodeMessage input) {
  80                                 return input.getNode();
  81                             }
  82                         }));
  83                     } else {
  84                         settableFuture.set(Optional.absent());
  85                     }
  86                 } else {
  87                     settableFuture.setException(throwable);
  88                 }
  89             }
  90         }, actorSystem.dispatcher());
  91         return checkedFuture;
  92     }
  93
  94     @Override
  95     public CheckedFuture<Boolean, ReadFailedException> exists(final LogicalDatastoreType store,
  96                                                               final YangInstanceIdentifier path) {
  97
  98         LOG.trace("{}: Exists {} via NETCONF: {}", id, store, path);
  99
 100         final Future<Boolean> existsFuture = delegate.exists(store, path);
 101         final SettableFuture<Boolean> settableFuture = SettableFuture.create();
 102         final CheckedFuture<Boolean, ReadFailedException> checkedFuture;
 103         checkedFuture = Futures.makeChecked(settableFuture, new Function<Exception, ReadFailedException>() {
 104             @Nullable
 105             @Override
 106             public ReadFailedException apply(Exception cause) {
 107                 return new ReadFailedException("Read from transaction failed", cause);
 108             }
 109         });
 110         existsFuture.onComplete(new OnComplete<Boolean>() {
 111             @Override
 112             public void onComplete(final Throwable throwable, final Boolean result) throws Throwable {
 113                 if (throwable == null) {
 114                     settableFuture.set(result);
 115                 } else {
 116                     settableFuture.setException(throwable);
 117                 }
 118             }
 119         }, actorSystem.dispatcher());
 120         return checkedFuture;
 121     }
 122
 123     @Override
 124     public Object getIdentifier() {
 125         return this;
 126     }
 127 }