@Override public void map( WritableComparable key, CompactorInputSplit split, OutputCollector<NullWritable, NullWritable> nullWritableVOutputCollector, Reporter reporter) throws IOException { // This will only get called once, since CompactRecordReader only returns one record, // the input split. // Based on the split we're passed we go instantiate the real reader and then iterate on it // until it finishes. @SuppressWarnings("unchecked") // since there is no way to parametrize instance of Class AcidInputFormat<WritableComparable, V> aif = instantiate(AcidInputFormat.class, jobConf.get(INPUT_FORMAT_CLASS_NAME)); ValidTxnList txnList = new ValidReadTxnList(jobConf.get(ValidTxnList.VALID_TXNS_KEY)); boolean isMajor = jobConf.getBoolean(IS_MAJOR, false); AcidInputFormat.RawReader<V> reader = aif.getRawReader( jobConf, isMajor, split.getBucket(), txnList, split.getBaseDir(), split.getDeltaDirs()); RecordIdentifier identifier = reader.createKey(); V value = reader.createValue(); getWriter(reporter, reader.getObjectInspector(), split.getBucket()); while (reader.next(identifier, value)) { if (isMajor && reader.isDelete(value)) continue; writer.write(value); reporter.progress(); } }
@Override public boolean next(NullWritable key, CompactorInputSplit compactorInputSplit) throws IOException { if (split != null) { compactorInputSplit.set(split); split = null; return true; } return false; }