Java tutorial
/** * 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.util; import org.apache.hadoop.classification.InterfaceAudience; import org.apache.hadoop.classification.InterfaceStability; /** * A facility for reporting progress. * * <p>Clients and/or applications can use the provided <code>Progressable</code> * to explicitly report progress to the Hadoop framework. This is especially * important for operations which take significant amount of time since, * in-lieu of the reported progress, the framework has to assume that an error * has occurred and time-out the operation.</p> */ @InterfaceAudience.Public @InterfaceStability.Stable public interface Progressable { /** * Report progress to the Hadoop framework. */ public void progress(); }