2 * Copyright (c) 2016 Cisco Systems, Inc. and others. All rights reserved.
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
9 package org.opendaylight.groupbasedpolicy.sxp.ep.provider.impl;
11 import com.google.common.base.Optional;
12 import com.google.common.util.concurrent.ListenableFuture;
13 import javax.annotation.Nonnull;
14 import org.opendaylight.yangtools.yang.binding.DataObject;
17 * Purpose: encapsulate access to DS by exposing
20 * <dd>search through values (either in local cache or directly in DataStore)</dd>
23 * @param <K> data key type
24 * @param <V> data type
26 public interface DSAsyncDao<K, V extends DataObject> {
29 * @param key for search
30 * @return value found by key
32 ListenableFuture<Optional<V>> read(@Nonnull K key);