hadoop StoreOp 源码
haddop StoreOp 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-common/src/main/java/org/apache/hadoop/yarn/nodelabels/store/StoreOp.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.nodelabels.store;
import java.io.IOException;
/**
* Define the interface for store activity.
* Used by for FileSystem based operation.
*
* @param <W> write to be done to
* @param <R> read to be done from
* @param <M> manager used
*/
public interface StoreOp<W, R, M> {
/**
* Write operation to persistent storage.
*
* @param write write to be done to
* @param mgr manager used by store
* @throws IOException
*/
void write(W write, M mgr) throws IOException;
/**
* Read and populate StoreOp.
*
* @param read read to be done from
* @param mgr manager used by store
* @throws IOException
*/
void recover(R read, M mgr) throws IOException;
}
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