hadoop RecoveryIterator 源码

  • 2022-10-20
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haddop RecoveryIterator 代码

文件路径:/hadoop-yarn-project/hadoop-yarn/hadoop-yarn-server/hadoop-yarn-server-nodemanager/src/main/java/org/apache/hadoop/yarn/server/nodemanager/recovery/RecoveryIterator.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.nodemanager.recovery;

import java.io.Closeable;
import java.io.IOException;
import java.util.NoSuchElementException;

/**
 * A wrapper for a Iterator to translate the raw RuntimeExceptions that
 * can be thrown into IOException.
 */
public interface RecoveryIterator<T> extends Closeable {

  /**
   * Returns true if the iteration has more elements.
   */
  boolean hasNext() throws IOException;

  /**
   * Returns the next element in the iteration.
   */
  T next() throws IOException, NoSuchElementException;

}

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