netconf/netconf-topology-singleton/src/main/java/org/opendaylight/netconf/topology/singleton/impl/actors/ReadAdapter.java

   1 /*
   2  * Copyright (c) 2017 Pantheon Technologies s.r.o. 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.netconf.topology.singleton.impl.actors;
   9
  10 import akka.actor.ActorRef;
  11 import akka.actor.Status.Failure;
  12 import com.google.common.util.concurrent.FutureCallback;
  13 import com.google.common.util.concurrent.MoreExecutors;
  14 import java.util.Optional;
  15 import javax.annotation.Nonnull;
  16 import org.opendaylight.mdsal.common.api.LogicalDatastoreType;
  17 import org.opendaylight.mdsal.dom.api.DOMDataTreeReadTransaction;
  18 import org.opendaylight.netconf.topology.singleton.messages.NormalizedNodeMessage;
  19 import org.opendaylight.netconf.topology.singleton.messages.transactions.EmptyReadResponse;
  20 import org.opendaylight.netconf.topology.singleton.messages.transactions.ExistsRequest;
  21 import org.opendaylight.netconf.topology.singleton.messages.transactions.ReadRequest;
  22 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  23 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  24
  25 class ReadAdapter {
  26
  27     private final DOMDataTreeReadTransaction tx;
  28
  29     ReadAdapter(final DOMDataTreeReadTransaction tx) {
  30         this.tx = tx;
  31     }
  32
  33     @SuppressWarnings("checkstyle:IllegalThrows")
  34     public void handle(final Object message, final ActorRef sender, final ActorRef self) {
  35         if (message instanceof ReadRequest) {
  36
  37             final ReadRequest readRequest = (ReadRequest) message;
  38             final YangInstanceIdentifier path = readRequest.getPath();
  39             final LogicalDatastoreType store = readRequest.getStore();
  40             read(path, store, sender, self);
  41
  42         } else if (message instanceof ExistsRequest) {
  43             final ExistsRequest readRequest = (ExistsRequest) message;
  44             final YangInstanceIdentifier path = readRequest.getPath();
  45             final LogicalDatastoreType store = readRequest.getStore();
  46             exists(path, store, sender, self);
  47         }
  48     }
  49
  50     private void read(final YangInstanceIdentifier path, final LogicalDatastoreType store, final ActorRef sender,
  51                       final ActorRef self) {
  52         tx.read(store, path).addCallback(new FutureCallback<Optional<NormalizedNode<?, ?>>>() {
  53             @Override
  54             public void onSuccess(final Optional<NormalizedNode<?, ?>> result) {
  55                 if (!result.isPresent()) {
  56                     sender.tell(new EmptyReadResponse(), self);
  57                     return;
  58                 }
  59                 sender.tell(new NormalizedNodeMessage(path, result.get()), self);
  60             }
  61
  62             @Override
  63             public void onFailure(@Nonnull final Throwable throwable) {
  64                 sender.tell(new Failure(throwable), self);
  65             }
  66         }, MoreExecutors.directExecutor());
  67     }
  68
  69     private void exists(final YangInstanceIdentifier path, final LogicalDatastoreType store, final ActorRef sender,
  70                         final ActorRef self) {
  71         tx.exists(store, path).addCallback(new FutureCallback<Boolean>() {
  72             @Override
  73             public void onSuccess(final Boolean result) {
  74                 if (result == null) {
  75                     sender.tell(Boolean.FALSE, self);
  76                 } else {
  77                     sender.tell(result, self);
  78                 }
  79             }
  80
  81             @Override
  82             public void onFailure(@Nonnull final Throwable throwable) {
  83                 sender.tell(new Failure(throwable), self);
  84             }
  85         }, MoreExecutors.directExecutor());
  86     }
  87 }