hadoop ProtoTranslator 源码
haddop ProtoTranslator 代码
文件路径：/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-csi/src/main/java/org/apache/hadoop/yarn/csi/translator/ProtoTranslator.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.csi.translator;
import org.apache.hadoop.yarn.exceptions.YarnException;
/**
* ProtoTranslator converts a YARN side message to CSI proto message
* and vice versa. Each CSI proto message should have a corresponding
* YARN side message implementation, and a transformer to convert them
* one to the other. This layer helps we to hide CSI spec messages
* from YARN components.
*
* @param <A> YARN side internal messages
* @param <B> CSI proto messages
*/
public interface ProtoTranslator<A, B> {
/**
* Convert message from type A to type B.
* @param messageA
* @return messageB
* @throws YarnException
*/
B convertTo(A messageA) throws YarnException;
/**
* Convert message from type B to type A.
* @param messageB
* @return messageA
* @throws YarnException
*/
A convertFrom(B messageB) throws YarnException;
}
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