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.util.InstanceIdentifierUtils;
  14 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  15 import org.opendaylight.controller.protobuff.messages.transaction.ShardTransactionMessages;
  16 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction;
  17 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  18
  19 public class DataExists extends AbstractRead<Boolean> {
  20
  21     public static final Class<ShardTransactionMessages.DataExists> SERIALIZABLE_CLASS =
  22             ShardTransactionMessages.DataExists.class;
  23
  24     public DataExists(final YangInstanceIdentifier path) {
  25         super(path);
  26     }
  27
  28     @Override public Object toSerializable() {
  29         return ShardTransactionMessages.DataExists.newBuilder()
  30             .setInstanceIdentifierPathArguments(
  31                 InstanceIdentifierUtils.toSerializable(getPath())).build();
  32     }
  33
  34     public static DataExists fromSerializable(final Object serializable){
  35         ShardTransactionMessages.DataExists o = (ShardTransactionMessages.DataExists) serializable;
  36         return new DataExists(InstanceIdentifierUtils.fromSerializable(o.getInstanceIdentifierPathArguments()));
  37     }
  38
  39     @Override
  40     public CheckedFuture<Boolean, ReadFailedException> apply(DOMStoreReadTransaction readDelegate) {
  41         return readDelegate.exists(getPath());
  42     }
  43
  44     @Override
  45     public void processResponse(Object response, SettableFuture<Boolean> returnFuture) {
  46         if(response instanceof DataExistsReply) {
  47             returnFuture.set(Boolean.valueOf(((DataExistsReply) response).exists()));
  48
  49         } else if(response.getClass().equals(DataExistsReply.SERIALIZABLE_CLASS)) {
  50             returnFuture.set(Boolean.valueOf(DataExistsReply.fromSerializable(response).exists()));
  51
  52         } else {
  53             returnFuture.setException(new ReadFailedException("Invalid response checking exists for path " + getPath()));
  54         }
  55     }
  56
  57 }