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.Optional;
  12 import com.google.common.base.Preconditions;
  13 import com.google.common.util.concurrent.CheckedFuture;
  14 import com.google.common.util.concurrent.SettableFuture;
  15 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  16 import org.opendaylight.controller.sal.core.spi.data.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 CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> apply(
  32             DOMStoreReadTransaction readDelegate) {
  33         return readDelegate.read(getPath());
  34     }
  35
  36     @Override
  37     public void processResponse(Object readResponse, SettableFuture<Optional<NormalizedNode<?, ?>>> returnFuture) {
  38         if (ReadDataReply.isSerializedType(readResponse)) {
  39             ReadDataReply reply = ReadDataReply.fromSerializable(readResponse);
  40             returnFuture.set(Optional.<NormalizedNode<?, ?>>fromNullable(reply.getNormalizedNode()));
  41         } else {
  42             returnFuture.setException(new ReadFailedException("Invalid response reading data for path " + getPath()));
  43         }
  44     }
  45
  46     @Override
  47     protected AbstractRead<Optional<NormalizedNode<?, ?>>> newInstance(short withVersion) {
  48         return new ReadData(getPath(), withVersion);
  49     }
  50
  51     public static ReadData fromSerializable(final Object serializable) {
  52         Preconditions.checkArgument(serializable instanceof ReadData);
  53         return (ReadData)serializable;
  54     }
  55
  56     public static boolean isSerializedType(Object message) {
  57         return message instanceof ReadData;
  58     }
  59 }