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package eu.dnetlib.data.mapreduce.es;
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import java.io.IOException;
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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.mapreduce.TableMapper;
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import org.apache.hadoop.hbase.util.Bytes;
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import org.apache.hadoop.io.BytesWritable;
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import org.apache.hadoop.io.NullWritable;
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import com.google.protobuf.InvalidProtocolBufferException;
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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.mapreduce.util.UpdateMerger;
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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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public class ElasticsearchFeedMapper extends TableMapper<NullWritable, BytesWritable> {
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@Override
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protected void setup(final Context context) throws IOException, InterruptedException {
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}
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@Override
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protected void map(final ImmutableBytesWritable keyIn, final Result value, final Context context) throws IOException, InterruptedException {
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final OafRowKeyDecoder keyDecoder = OafRowKeyDecoder.decode(keyIn.copyBytes());
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final Oaf oaf = mergeUpdates(value, context, keyDecoder.getType(), keyDecoder);
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if (isValid(oaf)) {
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context.write(NullWritable.get(), new BytesWritable(Bytes.toBytes(new JsonFormat().printToString(oaf))));
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}
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}
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private Oaf mergeUpdates(final Result value, final Context context, final Type type, final OafRowKeyDecoder keyDecoder)
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throws InvalidProtocolBufferException {
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try {
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return UpdateMerger.mergeBodyUpdates(context, value.getFamilyMap(Bytes.toBytes(type.toString())));
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} catch (final InvalidProtocolBufferException e) {
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System.err.println(String.format("Unable to parse proto (Type: %s) in row: %s", type.toString(), keyDecoder.getKey()));
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throw e;
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}
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}
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private boolean isValid(final Oaf oaf) {
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return (oaf != null) && oaf.isInitialized();
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}
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}
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