hadoop TimelineStoreMapAdapter 源码
haddop TimelineStoreMapAdapter 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-applicationhistoryservice/src/main/java/org/apache/hadoop/yarn/server/timeline/TimelineStoreMapAdapter.java
/**
* 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.hadoop.yarn.server.timeline;
import java.io.Closeable;
import java.util.Iterator;
/**
* An adapter for map timeline store implementations
* @param <K> the type of the key set
* @param <V> the type of the value set
*/
interface TimelineStoreMapAdapter<K, V> {
/**
* @param key
* @return map(key)
*/
V get(K key);
/**
* Add mapping key->value in the map
* @param key
* @param value
*/
void put(K key, V value);
/**
* Remove mapping with key keyToRemove
* @param keyToRemove
*/
void remove(K keyToRemove);
/**
* @return the iterator of the value set of the map
*/
CloseableIterator<V> valueSetIterator();
/**
* Return the iterator of the value set of the map, starting from minV if type
* V is comparable.
* @param minV
* @return
*/
CloseableIterator<V> valueSetIterator(V minV);
interface CloseableIterator<V> extends Iterator<V>, Closeable {}
}
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