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package eu.dnetlib.data.mapreduce.hbase.broker.enrich;
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import java.io.IOException;
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import java.util.Map;
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import com.google.common.collect.Iterables;
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import eu.dnetlib.data.mapreduce.util.DedupUtils;
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import eu.dnetlib.data.mapreduce.util.OafRowKeyDecoder;
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import eu.dnetlib.data.mapreduce.util.UpdateMerger;
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import eu.dnetlib.data.proto.DedupProtos.Dedup.RelName;
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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.commons.collections.MapUtils;
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import org.apache.hadoop.hbase.client.Result;
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import org.apache.hadoop.hbase.io.ImmutableBytesWritable;
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import org.apache.hadoop.hbase.util.Bytes;
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/**
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* Created by claudio on 08/07/16.
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*/
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public class EnrichmentMapper extends AbstractEnrichmentMapper {
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@Override
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protected String counterGroup() {
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return "Broker Enrichment";
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}
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@Override
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protected void map(final ImmutableBytesWritable key, final Result value, final Context context) throws IOException, InterruptedException {
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final String type = OafRowKeyDecoder.decode(key.copyBytes()).getType().toString();
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final Map<byte[], byte[]> result = value.getFamilyMap(Bytes.toBytes(Type.result.name()));
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if (MapUtils.isEmpty(result)) {
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context.getCounter(counterGroup(), type + ": empty family map").increment(1);
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return;
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}
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final Oaf body = UpdateMerger.mergeBodyUpdates(context, result);
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if (body == null) {
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context.getCounter(counterGroup(), type + ": body null").increment(1);
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return;
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}
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final String mergedInCF = DedupUtils.getDedupCF_mergedIn(Type.result);
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final Map<byte[], byte[]> mergedIn = value.getFamilyMap(Bytes.toBytes(mergedInCF));
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final byte[] outKey = getEmitKey(context, key, mergedIn);
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emit(context, outKey, body.toByteArray(), type);
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}
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private byte[] getEmitKey(final Context context, final ImmutableBytesWritable key, final Map<byte[], byte[]> mergedIn) {
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if (MapUtils.isNotEmpty(mergedIn)) {
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context.getCounter(Type.result.name(), RelName.isMergedIn.name()).increment(1);
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return Iterables.getOnlyElement(mergedIn.keySet());
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} else {
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return key.copyBytes();
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}
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}
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}
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