opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/datastore/messages/ReadData.java

   1 /*
   2  * Copyright (c) 2014 Cisco Systems, Inc. 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.controller.cluster.datastore.messages;
  10
  11 import com.google.common.base.Preconditions;
  12 import com.google.common.util.concurrent.FluentFuture;
  13 import com.google.common.util.concurrent.SettableFuture;
  14 import java.util.Optional;
  15 import org.opendaylight.mdsal.common.api.ReadFailedException;
  16 import org.opendaylight.mdsal.dom.spi.store.DOMStoreReadTransaction;
  17 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  18 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  19
  20 public class ReadData extends AbstractRead<Optional<NormalizedNode<?, ?>>> {
  21     private static final long serialVersionUID = 1L;
  22
  23     public ReadData() {
  24     }
  25
  26     public ReadData(final YangInstanceIdentifier path, short version) {
  27         super(path, version);
  28     }
  29
  30     @Override
  31     public FluentFuture<Optional<NormalizedNode<?, ?>>> apply(DOMStoreReadTransaction readDelegate) {
  32         return readDelegate.read(getPath());
  33     }
  34
  35     @Override
  36     public void processResponse(Object readResponse, SettableFuture<Optional<NormalizedNode<?, ?>>> returnFuture) {
  37         if (ReadDataReply.isSerializedType(readResponse)) {
  38             ReadDataReply reply = ReadDataReply.fromSerializable(readResponse);
  39             returnFuture.set(Optional.<NormalizedNode<?, ?>>ofNullable(reply.getNormalizedNode()));
  40         } else {
  41             returnFuture.setException(new ReadFailedException("Invalid response reading data for path " + getPath()));
  42         }
  43     }
  44
  45     @Override
  46     protected AbstractRead<Optional<NormalizedNode<?, ?>>> newInstance(short withVersion) {
  47         return new ReadData(getPath(), withVersion);
  48     }
  49
  50     public static ReadData fromSerializable(final Object serializable) {
  51         Preconditions.checkArgument(serializable instanceof ReadData);
  52         return (ReadData)serializable;
  53     }
  54
  55     public static boolean isSerializedType(Object message) {
  56         return message instanceof ReadData;
  57     }
  58 }