hadoop WorkRequestProcessor 源码

  • 2022-10-20
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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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