Progressable.java
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上传日期:2018-01-08
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- /**
- * 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;
- /**
- * 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 an insignificant amount of time since,
- * in-lieu of the reported progress, the framework has to assume that an error
- * has occured and time-out the operation.</p>
- */
- public interface Progressable {
- /**
- * Report progress to the Hadoop framework.
- */
- public void progress();
- }