hadoop WorkRequestProcessor 源码
haddop WorkRequestProcessor 代码
文件路径：/hadoop-tools/hadoop-distcp/src/main/java/org/apache/hadoop/tools/util/WorkRequestProcessor.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.tools.util;
/**
* Interface for ProducerConsumer worker loop.
*
*/
public interface WorkRequestProcessor<T, R> {
/**
* Work processor.
* The processor should be stateless: that is, it can be repeated after
* being interrupted.
*
* @param workRequest Input work item.
* @return Outputs WorkReport after processing workRequest item.
*
*/
public WorkReport<R> processItem(WorkRequest<T> workRequest);
}
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