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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.io.StringReader;
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import java.util.Map.Entry;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.io.Text;
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import org.apache.hadoop.mapreduce.Mapper;
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import org.dom4j.Document;
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import org.dom4j.io.SAXReader;
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public class DocumentDatabaseMapper extends Mapper<Text, Text, Text, Text> {
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@Override
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protected void setup(final Context context) throws IOException, InterruptedException {
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logConfiguration(context.getConfiguration());
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}
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@Override
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protected void map(final Text key, final Text value, final Context context) throws IOException, InterruptedException {
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try {
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final SAXReader reader = new SAXReader();
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final Document doc = reader.read(new StringReader(value.toString()));
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final String id = doc.valueOf("//dri:objIdentifier");
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addDocument(context, id, value.toString());
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context.getCounter("Document Database", "records").increment(1);
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} catch (Exception e) {
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context.getCounter("Document Database", "errors").increment(1);
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context.write(key, value);
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e.printStackTrace(System.err);
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}
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}
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private void addDocument(final Context context, final String id, final String string) {
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// TODO
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// ADD the document to the DB
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}
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@Override
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protected void cleanup(final Context context) throws IOException, InterruptedException {
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super.cleanup(context);
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}
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private void logConfiguration(final Configuration conf) {
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System.out.println("job configutation #################");
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for (Entry<String, String> e : conf) {
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System.out.println("'" + e.getKey() + "' : '" + e.getValue() + "'");
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}
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System.out.println("end of job configutation #################\n\n");
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}
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}
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