hadoop DUHelper 源码
haddop DUHelper 代码
文件路径：/hadoop-common-project/hadoop-common/src/main/java/org/apache/hadoop/fs/DUHelper.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.fs;
import java.io.File;
import org.apache.hadoop.util.Shell;
public class DUHelper {
private int folderCount=0;
private int fileCount=0;
private double usage = 0;
private long folderSize = -1;
private DUHelper() {
}
public static long getFolderUsage(String folder) {
return new DUHelper().calculateFolderSize(folder);
}
private long calculateFolderSize(String folder) {
if (folder == null)
throw new IllegalArgumentException("folder");
File f = new File(folder);
return folderSize = getFileSize(f);
}
public String check(String folder) {
if (folder == null)
throw new IllegalArgumentException("folder");
File f = new File(folder);
folderSize = getFileSize(f);
usage = 1.0*(f.getTotalSpace() - f.getFreeSpace())/ f.getTotalSpace();
return String.format("used %d files %d disk in use %f", folderSize, fileCount, usage);
}
public long getFileCount() {
return fileCount;
}
public double getUsage() {
return usage;
}
private long getFileSize(File folder) {
folderCount++;
//Counting the total folders
long foldersize = 0;
if (folder.isFile())
return folder.length();
File[] filelist = folder.listFiles();
if (filelist == null) {
return 0;
}
for (int i = 0; i < filelist.length; i++) {
if (filelist[i].isDirectory()) {
foldersize += getFileSize(filelist[i]);
} else {
fileCount++; //Counting the total files
foldersize += filelist[i].length();
}
}
return foldersize;
}
public static void main(String[] args) {
if (Shell.WINDOWS)
System.out.println("Windows: "+ DUHelper.getFolderUsage(args[0]));
else
System.out.println("Other: " + DUHelper.getFolderUsage(args[0]));
}
}
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