/**
* 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);
}
}
}