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