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.base.Optional;
  13 import com.google.common.util.concurrent.FutureCallback;
  14 import com.google.common.util.concurrent.Futures;
  15 import com.google.common.util.concurrent.MoreExecutors;
  16 import javax.annotation.Nonnull;
  17 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  18 import org.opendaylight.controller.md.sal.dom.api.DOMDataReadTransaction;
  19 import org.opendaylight.netconf.topology.singleton.messages.NormalizedNodeMessage;
  20 import org.opendaylight.netconf.topology.singleton.messages.transactions.EmptyReadResponse;
  21 import org.opendaylight.netconf.topology.singleton.messages.transactions.ExistsRequest;
  22 import org.opendaylight.netconf.topology.singleton.messages.transactions.ReadRequest;
  23 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  24 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  25
  26 class ReadAdapter {
  27
  28     private final DOMDataReadTransaction tx;
  29
  30     ReadAdapter(final DOMDataReadTransaction tx) {
  31         this.tx = tx;
  32     }
  33
  34     @SuppressWarnings("checkstyle:IllegalThrows")
  35     public void handle(final Object message, final ActorRef sender, final ActorRef self) throws Throwable {
  36         if (message instanceof ReadRequest) {
  37
  38             final ReadRequest readRequest = (ReadRequest) message;
  39             final YangInstanceIdentifier path = readRequest.getPath();
  40             final LogicalDatastoreType store = readRequest.getStore();
  41             read(path, store, sender, self);
  42
  43         } else if (message instanceof ExistsRequest) {
  44             final ExistsRequest readRequest = (ExistsRequest) message;
  45             final YangInstanceIdentifier path = readRequest.getPath();
  46             final LogicalDatastoreType store = readRequest.getStore();
  47             exists(path, store, sender, self);
  48         }
  49     }
  50
  51     private void read(final YangInstanceIdentifier path, final LogicalDatastoreType store, final ActorRef sender,
  52                       final ActorRef self) {
  53         Futures.addCallback(tx.read(store, path), new FutureCallback<Optional<NormalizedNode<?, ?>>>() {
  54
  55             @Override
  56             public void onSuccess(@Nonnull final Optional<NormalizedNode<?, ?>> result) {
  57                 if (!result.isPresent()) {
  58                     sender.tell(new EmptyReadResponse(), self);
  59                     return;
  60                 }
  61                 sender.tell(new NormalizedNodeMessage(path, result.get()), self);
  62             }
  63
  64             @Override
  65             public void onFailure(@Nonnull final Throwable throwable) {
  66                 sender.tell(new Failure(throwable), self);
  67             }
  68         }, MoreExecutors.directExecutor());
  69     }
  70
  71     private void exists(final YangInstanceIdentifier path, final LogicalDatastoreType store, final ActorRef sender,
  72                         final ActorRef self) {
  73         Futures.addCallback(tx.exists(store, path), new FutureCallback<Boolean>() {
  74             @Override
  75             public void onSuccess(final Boolean result) {
  76                 if (result == null) {
  77                     sender.tell(false, self);
  78                 } else {
  79                     sender.tell(result, self);
  80                 }
  81             }
  82
  83             @Override
  84             public void onFailure(@Nonnull final Throwable throwable) {
  85                 sender.tell(new Failure(throwable), self);
  86             }
  87         }, MoreExecutors.directExecutor());
  88     }
  89 }