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