opendaylight/md-sal/sal-distributed-datastore/src/main/java/org/opendaylight/controller/cluster/databroker/ShardedDOMStoreReadTransaction.java

   1 /*
   2  * Copyright (c) 2016 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 package org.opendaylight.controller.cluster.databroker;
   9
  10 import com.google.common.base.Optional;
  11 import com.google.common.util.concurrent.CheckedFuture;
  12 import org.opendaylight.controller.cluster.databroker.actors.dds.ClientTransaction;
  13 import org.opendaylight.controller.md.sal.common.api.data.ReadFailedException;
  14 import org.opendaylight.controller.sal.core.spi.data.DOMStoreReadTransaction;
  15 import org.opendaylight.yangtools.yang.data.api.YangInstanceIdentifier;
  16 import org.opendaylight.yangtools.yang.data.api.schema.NormalizedNode;
  17
  18 /**
  19  * Proxy implementation of {@link DOMStoreReadTransaction}. It routes all requests to the backing
  20  * {@link ClientTransaction}. This class is not final to allow further subclassing by
  21  * {@link ShardedDOMStoreReadWriteTransaction}.
  22  *
  23  * @author Robert Varga
  24  */
  25 class ShardedDOMStoreReadTransaction extends AbstractShardedTransaction implements DOMStoreReadTransaction {
  26     ShardedDOMStoreReadTransaction(final ClientTransaction tx) {
  27         super(tx);
  28     }
  29
  30     @Override
  31     public final void close() {
  32         transaction().abort();
  33     }
  34
  35     @Override
  36     public final CheckedFuture<Optional<NormalizedNode<?, ?>>, ReadFailedException> read(final YangInstanceIdentifier path) {
  37         return transaction().read(path);
  38     }
  39
  40     @Override
  41     public final CheckedFuture<Boolean, ReadFailedException> exists(final YangInstanceIdentifier path) {
  42         return transaction().exists(path);
  43     }
  44 }