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.util.concurrent.CheckedFuture;
  13 import com.google.common.util.concurrent.SettableFuture;
  14 import org.opendaylight.controller.cluster.datastore.DataStoreVersions;
  15 import org.opendaylight.controller.cluster.datastore.util.InstanceIdentifierUtils;
  16 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  17 import org.opendaylight.controller.protobuff.messages.transaction.ShardTransactionMessages;
  18 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction;
  19 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  20 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  21
  22 public class ReadData extends AbstractRead<Optional<NormalizedNode<?, ?>>> {
  23     private static final long serialVersionUID = 1L;
  24
  25     public ReadData() {
  26     }
  27
  28     public ReadData(final YangInstanceIdentifier path, short version) {
  29         super(path, version);
  30     }
  31
  32     @Override
  33     public Object toSerializable() {
  34         if(getVersion() >= DataStoreVersions.BORON_VERSION) {
  35             return this;
  36         } else {
  37             return ShardTransactionMessages.ReadData.newBuilder().setInstanceIdentifierPathArguments(
  38                     InstanceIdentifierUtils.toSerializable(getPath())).build();
  39         }
  40     }
  41
  42     @Override
  43     public CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> apply(DOMStoreReadTransaction readDelegate) {
  44         return readDelegate.read(getPath());
  45     }
  46
  47     @Override
  48     public void processResponse(Object readResponse, SettableFuture<Optional<NormalizedNode<?, ?>>> returnFuture) {
  49         if(ReadDataReply.isSerializedType(readResponse)) {
  50             ReadDataReply reply = ReadDataReply.fromSerializable(readResponse);
  51             returnFuture.set(Optional.<NormalizedNode<?, ?>> fromNullable(reply.getNormalizedNode()));
  52         } else {
  53             returnFuture.setException(new ReadFailedException("Invalid response reading data for path " + getPath()));
  54         }
  55     }
  56
  57     @Override
  58     protected AbstractRead<Optional<NormalizedNode<?, ?>>> newInstance(short withVersion) {
  59         return new ReadData(getPath(), withVersion);
  60     }
  61
  62     public static ReadData fromSerializable(final Object serializable) {
  63         if(serializable instanceof ReadData) {
  64             return (ReadData)serializable;
  65         } else {
  66             ShardTransactionMessages.ReadData o = (ShardTransactionMessages.ReadData)serializable;
  67             return new ReadData(InstanceIdentifierUtils.fromSerializable(o.getInstanceIdentifierPathArguments()),
  68                     DataStoreVersions.LITHIUM_VERSION);
  69         }
  70     }
  71
  72     public static boolean isSerializedType(Object message) {
  73         return message instanceof ReadData || message instanceof ShardTransactionMessages.ReadData;
  74     }
  75 }