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 javax.annotation.Nonnull;
  17 import org.opendaylight.controller.md.sal.common.api.data.LogicalDatastoreType;
  18 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  19 import org.opendaylight.controller.md.sal.dom.api.DOMDataReadTransaction;
  20 import org.opendaylight.netconf.topology.singleton.messages.NormalizedNodeMessage;
  21 import org.opendaylight.netconf.topology.singleton.messages.transactions.EmptyReadResponse;
  22 import org.opendaylight.netconf.topology.singleton.messages.transactions.ExistsRequest;
  23 import org.opendaylight.netconf.topology.singleton.messages.transactions.ReadRequest;
  24 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  25 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  26
  27 class ReadAdapter {
  28
  29     private final DOMDataReadTransaction tx;
  30
  31     public ReadAdapter(final DOMDataReadTransaction tx) {
  32         this.tx = tx;
  33     }
  34
  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         final CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> read = tx.read(store, path);
  54         Futures.addCallback(read, new FutureCallback<Optional<NormalizedNode<?, ?>>>() {
  55
  56             @Override
  57             public void onSuccess(final Optional<NormalizedNode<?, ?>> result) {
  58                 if (!result.isPresent()) {
  59                     sender.tell(new EmptyReadResponse(), self);
  60                     return;
  61                 }
  62                 sender.tell(new NormalizedNodeMessage(path, result.get()), self);
  63             }
  64
  65             @Override
  66             public void onFailure(@Nonnull final Throwable throwable) {
  67                 sender.tell(throwable, self);
  68             }
  69         });
  70     }
  71
  72     private void exists(final YangInstanceIdentifier path, final LogicalDatastoreType store, final ActorRef sender,
  73                         final ActorRef self) {
  74         final CheckedFuture<Boolean, ReadFailedException> readFuture = tx.exists(store, path);
  75         Futures.addCallback(readFuture, new FutureCallback<Boolean>() {
  76             @Override
  77             public void onSuccess(final Boolean result) {
  78                 if (result == null) {
  79                     sender.tell(false, self);
  80                 } else {
  81                     sender.tell(result, self);
  82                 }
  83             }
  84
  85             @Override
  86             public void onFailure(@Nonnull final Throwable throwable) {
  87                 sender.tell(throwable, self);
  88             }
  89         });
  90     }
  91 }