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