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
   9 package org.opendaylight.netconf.topology.singleton.impl.actors;
  10
  11 import akka.actor.ActorRef;
  12 import akka.actor.Status.Failure;
  13 import com.google.common.base.Optional;
  14 import com.google.common.util.concurrent.CheckedFuture;
  15 import com.google.common.util.concurrent.FutureCallback;
  16 import com.google.common.util.concurrent.Futures;
  17 import com.google.common.util.concurrent.MoreExecutors;
  18 import javax.annotation.Nonnull;
  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.DOMDataReadTransaction;
  22 import org.opendaylight.netconf.topology.singleton.messages.NormalizedNodeMessage;
  23 import org.opendaylight.netconf.topology.singleton.messages.transactions.EmptyReadResponse;
  24 import org.opendaylight.netconf.topology.singleton.messages.transactions.ExistsRequest;
  25 import org.opendaylight.netconf.topology.singleton.messages.transactions.ReadRequest;
  26 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  27 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  28
  29 class ReadAdapter {
  30
  31     private final DOMDataReadTransaction tx;
  32
  33     ReadAdapter(final DOMDataReadTransaction tx) {
  34         this.tx = tx;
  35     }
  36
  37     @SuppressWarnings("checkstyle:IllegalThrows")
  38     public void handle(final Object message, final ActorRef sender, final ActorRef self) throws Throwable {
  39         if (message instanceof ReadRequest) {
  40
  41             final ReadRequest readRequest = (ReadRequest) message;
  42             final YangInstanceIdentifier path = readRequest.getPath();
  43             final LogicalDatastoreType store = readRequest.getStore();
  44             read(path, store, sender, self);
  45
  46         } else if (message instanceof ExistsRequest) {
  47             final ExistsRequest readRequest = (ExistsRequest) message;
  48             final YangInstanceIdentifier path = readRequest.getPath();
  49             final LogicalDatastoreType store = readRequest.getStore();
  50             exists(path, store, sender, self);
  51         }
  52     }
  53
  54     private void read(final YangInstanceIdentifier path, final LogicalDatastoreType store, final ActorRef sender,
  55                       final ActorRef self) {
  56         final CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> read = tx.read(store, path);
  57         Futures.addCallback(read, new FutureCallback<Optional<NormalizedNode<?, ?>>>() {
  58
  59             @Override
  60             public void onSuccess(@Nonnull final Optional<NormalizedNode<?, ?>> result) {
  61                 if (!result.isPresent()) {
  62                     sender.tell(new EmptyReadResponse(), self);
  63                     return;
  64                 }
  65                 sender.tell(new NormalizedNodeMessage(path, result.get()), self);
  66             }
  67
  68             @Override
  69             public void onFailure(@Nonnull final Throwable throwable) {
  70                 sender.tell(new Failure(throwable), self);
  71             }
  72         }, MoreExecutors.directExecutor());
  73     }
  74
  75     private void exists(final YangInstanceIdentifier path, final LogicalDatastoreType store, final ActorRef sender,
  76                         final ActorRef self) {
  77         final CheckedFuture<Boolean, ReadFailedException> readFuture = tx.exists(store, path);
  78         Futures.addCallback(readFuture, new FutureCallback<Boolean>() {
  79             @Override
  80             public void onSuccess(final Boolean result) {
  81                 if (result == null) {
  82                     sender.tell(false, self);
  83                 } else {
  84                     sender.tell(result, self);
  85                 }
  86             }
  87
  88             @Override
  89             public void onFailure(@Nonnull final Throwable throwable) {
  90                 sender.tell(new Failure(throwable), self);
  91             }
  92         }, MoreExecutors.directExecutor());
  93     }
  94 }