org.apache.crunch.io.SourceTargetHelper.java Source code

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Here is the source code for org.apache.crunch.io.SourceTargetHelper.java

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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.crunch.io;

import java.io.IOException;

import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileStatus;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;

/**
 * Functions for configuring the inputs/outputs of MapReduce jobs.
 * 
 */
public class SourceTargetHelper {

    public static long getPathSize(Configuration conf, Path path) throws IOException {
        return getPathSize(path.getFileSystem(conf), path);
    }

    public static long getPathSize(FileSystem fs, Path path) throws IOException {
        FileStatus[] stati = fs.globStatus(path);
        if (stati == null || stati.length == 0) {
            return -1L;
        }
        long size = 0;
        for (FileStatus status : stati) {
            if (status.isDir()) {
                for (FileStatus st : fs.listStatus(status.getPath())) {
                    size += st.getLen();
                }
            } else {
                size += status.getLen();
            }
        }
        return size;
    }

    public static long getLastModifiedAt(FileSystem fs, Path path) throws IOException {
        FileStatus[] stati = fs.globStatus(path);
        if (stati == null || stati.length == 0) {
            return -1L;
        }
        long lastMod = -1;
        for (FileStatus status : stati) {
            if (lastMod < status.getModificationTime()) {
                lastMod = status.getModificationTime();
            }
        }
        return lastMod;
    }
}