WriteHdfs.java Source code

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Here is the source code for WriteHdfs.java

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/**
* Tencent is pleased to support the open source community by making TDW available.
* Copyright (C) 2014 THL A29 Limited, a Tencent company. All rights reserved.
* Licensed 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.
*/

import java.io.IOException;

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

public class WriteHdfs {
    static String str = "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000"
            + "0000000000000000000000000000000000000000000000000000000000000000";

    static byte[] data = str.getBytes();

    static void writehdfs(String filename, long length) throws IOException {
        FileSystem fs = FileSystem.get(new Configuration());
        FSDataOutputStream fos = fs.create(new Path(filename), true, 1024 * 1024, null);
        for (int i = 0; i < length / data.length; i++) {
            fos.write(data);
        }
        fos.close();
    }

    public static void main(String[] args) throws IOException {
        if (args.length < 2) {
            System.out.println("filename | length");
            return;
        }
        String filename = args[0];
        long length = Long.valueOf(args[1]);
        long time = System.currentTimeMillis();
        writehdfs(filename, length);
        System.out.println(System.currentTimeMillis() - time);
    }
}