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package eu.dnetlib.data.mapreduce.hbase.index;
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import java.io.IOException;
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import java.util.Set;
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import com.google.common.base.Splitter;
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import com.google.common.collect.Sets;
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import eu.dnetlib.data.mapreduce.JobParams;
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import eu.dnetlib.data.mapreduce.hbase.index.config.ContextMapper;
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import eu.dnetlib.data.mapreduce.hbase.index.config.EntityConfigTable;
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import eu.dnetlib.data.mapreduce.hbase.index.config.IndexConfig;
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import eu.dnetlib.data.mapreduce.hbase.index.config.RelClasses;
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import eu.dnetlib.data.mapreduce.util.OafDecoder;
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import eu.dnetlib.data.mapreduce.util.OafHbaseUtils;
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import eu.dnetlib.data.mapreduce.util.OafRowKeyDecoder;
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import eu.dnetlib.data.mapreduce.util.XmlRecordFactory;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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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 org.dom4j.DocumentException;
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public class PrepareFeedReducer extends Reducer<Text, ImmutableBytesWritable, Text, Text> {
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private static final Log log = LogFactory.getLog(PrepareFeedReducer.class); // NOPMD by marko on 11/24/08 5:02 PM
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private EntityConfigTable entityConfigTable;
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private ContextMapper contextMapper = new ContextMapper();
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private RelClasses relClasses;
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private Set<String> otherDatasourceTypesUForUI;
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private String schemaLocation;
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private final boolean entityDefaults = true;
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private final boolean relDefaults = false;
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private final boolean childDefaults = false;
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@Override
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protected void setup(final Context context) throws IOException, InterruptedException {
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final String json = context.getConfiguration().get(JobParams.INDEX_ENTITY_LINKS);
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log.info(JobParams.INDEX_ENTITY_LINKS + ":\n" + json);
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entityConfigTable = IndexConfig.load(json).getConfigMap();
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schemaLocation = context.getConfiguration().get("oaf.schema.location");
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log.info("schema location" + ":\n" + schemaLocation);
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final String contextMap = context.getConfiguration().get("contextmap");
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log.info("contextmap:\n" + contextMap);
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try {
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contextMapper = ContextMapper.fromXml(contextMap);
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log.info("context map:\n" + contextMapper);
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} catch (final DocumentException e) {
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throw new RuntimeException("unable to parse contextMap: " + contextMap, e);
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}
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final String relClassJson = context.getConfiguration().get("relClasses");
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log.info("relClassesJson:\n" + relClassJson);
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relClasses = new RelClasses(relClassJson);
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log.info("relClasses:\n" + relClasses);
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String otherDsTypesUI = context.getConfiguration().get("ui.other.datasourcetypes");
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log.info("ui.other.datasourcetypes:" + otherDsTypesUI);
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otherDatasourceTypesUForUI = Sets.newHashSet(Splitter.on(",").trimResults().omitEmptyStrings().split(otherDsTypesUI));
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log.info("ui.other.datasourcetypes parsed:" + otherDatasourceTypesUForUI);
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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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try {
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final XmlRecordFactory builder =
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new XmlRecordFactory(entityConfigTable, contextMapper, relClasses, schemaLocation, entityDefaults, relDefaults, childDefaults, otherDatasourceTypesUForUI);
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try {
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decodeValues(context, keyDecoder, values, builder);
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if (builder.isValid()) {
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context.write(keyDecoder.getKeyAsText(), new Text(builder.build()));
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// context.getCounter("entity", keyDecoder.getType().toString()).increment(1);
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} else {
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// System.err.println("invalid " + getType(key) + ": " + key.toString());
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context.getCounter("missing body (reduce)", keyDecoder.getType().toString()).increment(1);
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}
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} catch (final OutOfMemoryError e) {
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context.getCounter("error", e.getClass().getName()).increment(1);
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log.error(String.format("memory error building entity\nid: '%s'\ncounters: %s", keyDecoder.getKey(), builder.getRelCounters()), e);
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throw e;
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}
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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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private void decodeValues(final Context context,
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final OafRowKeyDecoder keyDecoder,
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final Iterable<ImmutableBytesWritable> values,
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final XmlRecordFactory builder) {
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for (final ImmutableBytesWritable bytes : values) {
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final OafDecoder decoder = OafHbaseUtils.decode(bytes);
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switch (decoder.getKind()) {
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case entity:
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builder.setMainEntity(decoder);
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break;
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case relation:
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if (decoder.getOafRel().getChild()) {
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builder.addChild(keyDecoder.getType(), decoder);
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} else {
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builder.addRelation(keyDecoder.getType(), decoder);
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}
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break;
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default:
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throw new IllegalArgumentException("unknow type: " + decoder.getKind());
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}
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}
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}
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}
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