public void setup(Context context) {
Configuration conf = context.getConfiguration();
String date = DayPartitioner.getDate(context);
HDFSPath outdir = new HDFSPath(conf, conf.get("output"));
Datafile dataFile = outdir.getFile(date);
sentenceFile = new SentenceFile(dataFile);
sentenceFile.openWrite();
}
@Override
public void cleanup(Context context) {
sentenceFile.closeWrite();
}