org.apache.hadoop.mapred.Utils Maven / Gradle / Ivy
/**
* 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.mapred;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.fs.PathFilter;
/**
* A utility class. It provides
* - file-util
* - A path filter utility to filter out output/part files in the output dir
*/
public class Utils {
public static class OutputFileUtils {
/**
* This class filters output(part) files from the given directory
* It does not accept files with filenames _logs and _SUCCESS.
* This can be used to list paths of output directory as follows:
* Path[] fileList = FileUtil.stat2Paths(fs.listStatus(outDir,
* new OutputFilesFilter()));
*/
public static class OutputFilesFilter extends OutputLogFilter {
public boolean accept(Path path) {
return super.accept(path)
&& !FileOutputCommitter.SUCCEEDED_FILE_NAME
.equals(path.getName());
}
}
/**
* This class filters log files from directory given
* It doesnt accept paths having _logs.
* This can be used to list paths of output directory as follows:
* Path[] fileList = FileUtil.stat2Paths(fs.listStatus(outDir,
* new OutputLogFilter()));
*/
public static class OutputLogFilter implements PathFilter {
public boolean accept(Path path) {
return !(path.toString().contains("_logs"));
}
}
}
}