co.nubetech.hiho.mapreduce.lib.output.FTPTextOutputFormat.java Source code

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Here is the source code for co.nubetech.hiho.mapreduce.lib.output.FTPTextOutputFormat.java

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/**
 * Copyright 2010 Nube Technologies
 * 
 * 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. 
 */
package co.nubetech.hiho.mapreduce.lib.output;

import java.io.DataOutputStream;
import java.io.IOException;
import java.io.OutputStream;
import java.io.UnsupportedEncodingException;

import org.apache.commons.net.ftp.FTP;
import org.apache.commons.net.ftp.FTPClient;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.compress.CompressionCodec;
import org.apache.hadoop.io.compress.GzipCodec;
import org.apache.hadoop.mapred.FileAlreadyExistsException;
import org.apache.hadoop.mapreduce.JobContext;
import org.apache.hadoop.mapreduce.RecordWriter;
import org.apache.hadoop.mapreduce.TaskAttemptContext;
import org.apache.hadoop.mapreduce.lib.output.TextOutputFormat;
import org.apache.hadoop.util.ReflectionUtils;

import co.nubetech.hiho.common.HIHOConf;

public class FTPTextOutputFormat<K, V> extends TextOutputFormat<K, V> {

    protected static class FTPLineRecordWriter<K, V> extends LineRecordWriter<K, V> {
        private static final String utf8 = "UTF-8";
        private static final byte[] newline;
        static {
            try {
                newline = "\n".getBytes(utf8);
            } catch (UnsupportedEncodingException uee) {
                throw new IllegalArgumentException("can't find " + utf8 + " encoding");
            }
        }

        private final byte[] keyValueSeparator;
        private FTPClient ftpClient;

        public FTPLineRecordWriter(DataOutputStream out, String keyValueSeparator, FTPClient ftpClient) {
            super(out, keyValueSeparator);
            this.ftpClient = ftpClient;
            try {
                this.keyValueSeparator = keyValueSeparator.getBytes(utf8);
            } catch (UnsupportedEncodingException uee) {
                throw new IllegalArgumentException("can't find " + utf8 + " encoding");
            }
        }

        public FTPLineRecordWriter(DataOutputStream out, FTPClient ftpClient) {
            this(out, "\t", ftpClient);
        }

        /**
         * Write the object to the byte stream, handling Text as a special case.
         * 
         * @param o
         *            the object to print
         * @throws IOException
         *             if the write throws, we pass it on
         */
        private void writeObject(Object o) throws IOException {
            if (o instanceof Text) {
                Text to = (Text) o;
                out.write(to.getBytes(), 0, to.getLength());
            } else {
                out.write(o.toString().getBytes(utf8));
            }
        }

        public synchronized void close(TaskAttemptContext context) throws IOException {
            out.close();
            ftpClient.disconnect();
        }
    }

    @Override
    public void checkOutputSpecs(JobContext job) throws FileAlreadyExistsException, IOException {
    }

    @Override
    public RecordWriter<K, V> getRecordWriter(TaskAttemptContext job) throws IOException, InterruptedException {

        Configuration conf = job.getConfiguration();

        String ip = conf.get(HIHOConf.FTP_ADDRESS);
        String portno = conf.get(HIHOConf.FTP_PORT);
        String usr = conf.get(HIHOConf.FTP_USER);
        String pwd = conf.get(HIHOConf.FTP_PASSWORD);
        String dir = getOutputPath(job).toString();
        System.out.println("\n\ninside ftpoutputformat" + ip + " " + portno + " " + usr + " " + pwd + " " + dir);
        String keyValueSeparator = conf.get("mapred.textoutputformat.separator", "\t");
        FTPClient f = new FTPClient();
        f.connect(ip, Integer.parseInt(portno));
        f.login(usr, pwd);
        f.changeWorkingDirectory(dir);
        f.setFileType(FTP.BINARY_FILE_TYPE);

        boolean isCompressed = getCompressOutput(job);
        CompressionCodec codec = null;
        String extension = "";
        if (isCompressed) {
            Class<? extends CompressionCodec> codecClass = getOutputCompressorClass(job, GzipCodec.class);
            codec = (CompressionCodec) ReflectionUtils.newInstance(codecClass, conf);
            extension = codec.getDefaultExtension();
        }
        Path file = getDefaultWorkFile(job, extension);
        FileSystem fs = file.getFileSystem(conf);
        String filename = file.getName();
        if (!isCompressed) {
            // FSDataOutputStream fileOut = fs.create(file, false);
            OutputStream os = f.appendFileStream(filename);
            DataOutputStream fileOut = new DataOutputStream(os);
            return new FTPLineRecordWriter<K, V>(fileOut, new String(keyValueSeparator), f);

        } else {
            // FSDataOutputStream fileOut = fs.create(file, false);
            OutputStream os = f.appendFileStream(filename);
            DataOutputStream fileOut = new DataOutputStream(os);
            return new FTPLineRecordWriter<K, V>(new DataOutputStream(codec.createOutputStream(fileOut)),
                    keyValueSeparator, f);
        }
    }

}