| /** |
| * Licensed to the Apache Software Foundation (ASF) under one |
| * or more contributor license agreements. See the NOTICE file |
| * distributed with this work for additional information |
| * regarding copyright ownership. The ASF licenses this file |
| * to you under the Apache License, Version 2.0 (the |
| * "License"); you may not use this file except in compliance |
| * with the License. You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, |
| * software distributed under the License is distributed on an |
| * "AS IS" BASIS, WITHOUT WARRANTIES OR CONDITIONS OF ANY |
| * KIND, either express or implied. See the License for the |
| * specific language governing permissions and limitations |
| * under the License. |
| */ |
| package org.apache.apex.malhar.lib.db; |
| |
| import java.util.List; |
| import java.util.Map; |
| |
| /** |
| * This interface is for any service that provides key/value storage |
| * |
| * @since 0.9.3 |
| */ |
| public interface KeyValueStore extends Connectable |
| { |
| /** |
| * Gets the value given the key. |
| * |
| * @param key |
| * @return the value |
| */ |
| public Object get(Object key); |
| |
| /** |
| * Gets all the values given by all the keys. |
| * Optimally the implementation should take advantage of any bulk get call with the store |
| * |
| * @param keys |
| * @return the list of values |
| */ |
| public List<Object> getAll(List<Object> keys); |
| |
| /** |
| * Sets the key with the value in the store. |
| * |
| * @param key |
| * @param value |
| */ |
| public void put(Object key, Object value); |
| |
| /** |
| * Sets the keys with the values according to the given map |
| * |
| * @param m the map |
| */ |
| public void putAll(Map<Object, Object> m); |
| |
| /** |
| * Removes the key and the value given the key |
| * |
| * @param key |
| */ |
| public void remove(Object key); |
| } |