netconf/netconf-topology/src/main/java/org/opendaylight/netconf/topology/pipeline/tx/ProxyReadOnlyTransaction.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.netconf.topology.pipeline.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.pipeline.ProxyNetconfDeviceDataBroker;
  24 import org.opendaylight.netconf.topology.util.messages.NormalizedNodeMessage;
  25 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  26 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  27 import scala.concurrent.Future;
  28
  29 public class ProxyReadOnlyTransaction implements DOMDataReadOnlyTransaction{
  30
  31     private final RemoteDeviceId id;
  32     private final ProxyNetconfDeviceDataBroker delegate;
  33     private final ActorSystem actorSystem;
  34
  35     public ProxyReadOnlyTransaction(final ActorSystem actorSystem, final RemoteDeviceId id, final ProxyNetconfDeviceDataBroker delegate) {
  36         this.id = id;
  37         this.delegate = delegate;
  38         this.actorSystem = actorSystem;
  39     }
  40
  41     @Override
  42     public void close() {
  43         //NOOP
  44     }
  45
  46     @Override
  47     public CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> read(final LogicalDatastoreType store, final YangInstanceIdentifier path) {
  48         final Future<Optional<NormalizedNodeMessage>> future = delegate.read(store, path);
  49         final SettableFuture<Optional<NormalizedNode<?, ?>>> settableFuture = SettableFuture.create();
  50         final CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> checkedFuture = Futures.makeChecked(settableFuture, new Function<Exception, ReadFailedException>() {
  51             @Nullable
  52             @Override
  53             public ReadFailedException apply(Exception cause) {
  54                 return new ReadFailedException("Read from transaction failed", cause);
  55             }
  56         });
  57         future.onComplete(new OnComplete<Optional<NormalizedNodeMessage>>() {
  58             @Override
  59             public void onComplete(Throwable throwable, Optional<NormalizedNodeMessage> normalizedNodeMessage) throws Throwable {
  60                 if (throwable == null) {
  61                     if (normalizedNodeMessage.isPresent()) {
  62                         settableFuture.set(normalizedNodeMessage.transform(new Function<NormalizedNodeMessage, NormalizedNode<?, ?>>() {
  63                             @Nullable
  64                             @Override
  65                             public NormalizedNode<?, ?> apply(NormalizedNodeMessage input) {
  66                                 return input.getNode();
  67                             }
  68                         }));
  69                     } else {
  70                         settableFuture.set(Optional.absent());
  71                     }
  72                 } else {
  73                     settableFuture.setException(throwable);
  74                 }
  75             }
  76         }, actorSystem.dispatcher());
  77         return checkedFuture;
  78     }
  79
  80     @Override
  81     public CheckedFuture<Boolean, ReadFailedException> exists(final LogicalDatastoreType store, final YangInstanceIdentifier path) {
  82         final Future<Boolean> existsFuture = delegate.exists(store, path);
  83         final SettableFuture<Boolean> settableFuture = SettableFuture.create();
  84         final CheckedFuture<Boolean, ReadFailedException> checkedFuture = Futures.makeChecked(settableFuture, new Function<Exception, ReadFailedException>() {
  85             @Nullable
  86             @Override
  87             public ReadFailedException apply(Exception cause) {
  88                 return new ReadFailedException("Read from transaction failed", cause);
  89             }
  90         });
  91         existsFuture.onComplete(new OnComplete<Boolean>() {
  92             @Override
  93             public void onComplete(Throwable throwable, Boolean result) throws Throwable {
  94                 if (throwable == null) {
  95                     settableFuture.set(result);
  96                 } else {
  97                     settableFuture.setException(throwable);
  98                 }
  99             }
 100         }, actorSystem.dispatcher());
 101         return checkedFuture;
 102     }
 103
 104     @Override
 105     public Object getIdentifier() {
 106         return this;
 107     }
 108 }