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package eu.dnetlib.data.mapreduce.hbase.broker;
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import java.io.IOException;
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import com.googlecode.protobuf.format.JsonFormat;
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import eu.dnetlib.data.mapreduce.util.OafRowKeyDecoder;
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import eu.dnetlib.data.proto.KindProtos.Kind;
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import eu.dnetlib.data.proto.OafProtos.Oaf;
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import eu.dnetlib.data.proto.TypeProtos.Type;
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import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
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import org.apache.hadoop.io.Text;
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import org.apache.hadoop.mapreduce.Reducer;
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import static eu.dnetlib.data.mapreduce.util.OafHbaseUtils.asOaf;
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public class PrepareBrokerDataReducer extends Reducer<Text, ImmutableBytesWritable, Text, Text> {
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private Text outKey;
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private Text outValue;
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@Override
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protected void setup(final Context context) throws IOException, InterruptedException {
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outKey = new Text("");
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outValue = new Text();
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}
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@Override
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protected void reduce(final Text key, final Iterable<ImmutableBytesWritable> values, final Context context) throws IOException, InterruptedException {
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final OafRowKeyDecoder keyDecoder = OafRowKeyDecoder.decode(key.toString());
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if (!keyDecoder.getType().equals(Type.result)) {
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return;
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}
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try {
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boolean entity = false;
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final Oaf.Builder out = Oaf.newBuilder();
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for(Oaf oaf : asOaf(values)) {
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if (Kind.entity.equals(oaf.getKind())) {
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if (entity == true) {
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context.getCounter("result", "skipped group > 1").increment(1);
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return;
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}
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final String resulttypeid = oaf.getEntity().getResult().getMetadata().getResulttype().getClassid();
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if (!"publication".equals(resulttypeid)) {
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context.getCounter("result", "skipped " + resulttypeid).increment(1);
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return;
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}
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out.mergeFrom(oaf);
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entity = true;
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} else {
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out.getEntityBuilder().addCachedRel(oaf.getRel());
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}
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}
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outValue.set(JsonFormat.printToString(out.build()));
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context.write(outKey, outValue);
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} catch (final Exception e) {
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context.getCounter("error", e.getClass().getName()).increment(1);
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throw new RuntimeException(e);
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}
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}
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}
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