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.topology.singleton.api.NetconfDOMTransaction;
  23 import org.opendaylight.netconf.topology.singleton.messages.NormalizedNodeMessage;
  24 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  25 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  26 import scala.concurrent.Future;
  27
  28 public class NetconfReadOnlyTransaction implements DOMDataReadOnlyTransaction {
  29
  30     private final NetconfDOMTransaction delegate;
  31     private final ActorSystem actorSystem;
  32
  33     public NetconfReadOnlyTransaction(final ActorSystem actorSystem, final NetconfDOMTransaction delegate) {
  34         this.delegate = delegate;
  35         this.actorSystem = actorSystem;
  36     }
  37
  38     @Override
  39     public void close() {
  40         //NOOP
  41     }
  42
  43     @Override
  44     public CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> read(final LogicalDatastoreType store,
  45                                                                                    final YangInstanceIdentifier path) {
  46         final Future<Optional<NormalizedNodeMessage>> future = delegate.read(store, path);
  47         final SettableFuture<Optional<NormalizedNode<?, ?>>> settableFuture = SettableFuture.create();
  48         final CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> checkedFuture;
  49         checkedFuture = Futures.makeChecked(settableFuture, new Function<Exception, ReadFailedException>() {
  50             @Nullable
  51             @Override
  52             public ReadFailedException apply(Exception cause) {
  53                 return new ReadFailedException("Read from transaction failed", cause);
  54             }
  55         });
  56         future.onComplete(new OnComplete<Optional<NormalizedNodeMessage>>() {
  57             @Override
  58             public void onComplete(final Throwable throwable,
  59                                    final Optional<NormalizedNodeMessage> normalizedNodeMessage) throws Throwable {
  60                 if (throwable == null) {
  61                     if (normalizedNodeMessage.isPresent()) {
  62                         settableFuture.set(normalizedNodeMessage.transform(new Function<NormalizedNodeMessage,
  63                                 NormalizedNode<?, ?>>() {
  64
  65                             @Nullable
  66                             @Override
  67                             public NormalizedNode<?, ?> apply(final NormalizedNodeMessage input) {
  68                                 return input.getNode();
  69                             }
  70                         }));
  71                     } else {
  72                         settableFuture.set(Optional.absent());
  73                     }
  74                 } else {
  75                     settableFuture.setException(throwable);
  76                 }
  77             }
  78         }, actorSystem.dispatcher());
  79         return checkedFuture;
  80     }
  81
  82     @Override
  83     public CheckedFuture<Boolean, ReadFailedException> exists(final LogicalDatastoreType store,
  84                                                               final YangInstanceIdentifier path) {
  85         final Future<Boolean> existsFuture = delegate.exists(store, path);
  86         final SettableFuture<Boolean> settableFuture = SettableFuture.create();
  87         final CheckedFuture<Boolean, ReadFailedException> checkedFuture;
  88         checkedFuture = Futures.makeChecked(settableFuture, new Function<Exception, ReadFailedException>() {
  89             @Nullable
  90             @Override
  91             public ReadFailedException apply(Exception cause) {
  92                 return new ReadFailedException("Read from transaction failed", cause);
  93             }
  94         });
  95         existsFuture.onComplete(new OnComplete<Boolean>() {
  96             @Override
  97             public void onComplete(final Throwable throwable, final Boolean result) throws Throwable {
  98                 if (throwable == null) {
  99                     settableFuture.set(result);
 100                 } else {
 101                     settableFuture.setException(throwable);
 102                 }
 103             }
 104         }, actorSystem.dispatcher());
 105         return checkedFuture;
 106     }
 107
 108     @Override
 109     public Object getIdentifier() {
 110         return this;
 111     }
 112 }