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package eu.dnetlib.data.mapreduce.hbase.lodImport;
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import java.io.IOException;
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import java.sql.Connection;
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import java.sql.PreparedStatement;
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import java.util.ArrayList;
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import java.util.Arrays;
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import java.util.Iterator;
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import java.util.List;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.io.NullWritable;
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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.apache.log4j.Logger;
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import org.json.JSONObject;
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import com.jolbox.bonecp.BoneCPDataSource;
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import eu.dnetlib.data.mapreduce.hbase.lodImport.utils.DB;
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import eu.dnetlib.data.mapreduce.hbase.lodImport.utils.MapCountries;
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import eu.dnetlib.data.mapreduce.hbase.lodImport.utils.MapLanguages;
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import eu.dnetlib.data.mapreduce.hbase.lodImport.utils.RDFizer;
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public class LodImportReducer extends Reducer<Text, Text, NullWritable, NullWritable> {
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private Logger log = Logger.getLogger(LodImportReducer.class);
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private BoneCPDataSource ds;
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private String fileName = "";
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private Configuration hadoopConf;
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// private VirtGraph graph;
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private int counter;
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private int commitCounter;
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private String[] buildQuery = new String[2];
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private String insertQuery = "";
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private String deleteQuery = "";
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private String defaultGraph = "";
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private int entitiesPerQuery;
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private MapCountries mapCountries;
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private MapLanguages mapLanguages;
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private Connection conn;
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private Connection dConn;
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private JSONObject entitiesMappings;
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private JSONObject relationsMappings;
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public static enum REDUCES_COUNTER {
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RESULT,
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PROJECT,
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DATASOURCE,
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PERSON,
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ORGANIZATION,
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TOTAL_ENTITIES,
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TOTAL_RELATIONS
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}
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@Override
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protected void setup(Context context) throws IOException, InterruptedException {
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this.hadoopConf = context.getConfiguration();
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this.fileName = hadoopConf.get("lod.inputFile");
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if (!fileName.contains("relations")) defaultGraph = hadoopConf.get("lod.defaultGraph");
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else defaultGraph = hadoopConf.get("lod.relationsGraph");
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this.counter = 0;
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mapCountries = new MapCountries();
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mapLanguages = new MapLanguages();
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buildQuery[0] = "";
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buildQuery[1] = "";
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entitiesMappings = new JSONObject(hadoopConf.get("lod.jsonEntities"));
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relationsMappings = new JSONObject(hadoopConf.get("lod.jsonRels"));
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if (!fileName.contains("relations")) entitiesPerQuery = Integer.parseInt(hadoopConf.get("lod.entitiesPerQuery"));
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else entitiesPerQuery = Integer.parseInt(hadoopConf.get("lod.relationsPerQuery"));
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try {
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DB db = new DB();
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ds = db.getDatasource(hadoopConf.get("lod.conLine"), hadoopConf.get("lod.username"), hadoopConf.get("lod.password"), hadoopConf.get("lod.minCpart"), hadoopConf.get("lod.maxCpart"), hadoopConf.get("lod.part"));
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conn = ds.getConnection();
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conn.setAutoCommit(false);
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} catch (Exception e) {
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log.error(e.toString(), e);
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}
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}
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@Override
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protected void reduce(final Text key, final Iterable<Text> values, final Context context) throws IOException, InterruptedException {
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if (entitiesMappings == null || relationsMappings == null) {
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throw new InterruptedException("Could not read json mappings!");
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}
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Iterator<Text> it = values.iterator();
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while (it.hasNext()) {
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String data = it.next().toString();
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String[] split = data.split(hadoopConf.get("lod.delim"));
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List<String> row = new ArrayList<String>(Arrays.asList(split));
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if (!fileName.contains("relations")) {
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buildQuery = RDFizer.RDFizeEntityRow(row, ds, entitiesMappings, hadoopConf, mapCountries, mapLanguages, defaultGraph);
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insertQuery += buildQuery[0];
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deleteQuery += buildQuery[1];
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} else {
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buildQuery = RDFizer.RDFizeRelationRow(row, relationsMappings, hadoopConf);
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insertQuery += buildQuery[0];
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}
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}
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counter++;
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if (counter > entitiesPerQuery ) {
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try {
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PreparedStatement ps = conn.prepareStatement("DB.DBA.TTLP_MT (?, ?, ?, ?, ?, ?,?)");
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ps.setString(1, insertQuery);
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ps.setString(2, "");
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ps.setString(3, defaultGraph);
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final int NQUAD_LEVEL = 64;
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ps.setInt(4, NQUAD_LEVEL);
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ps.setInt(5, 0);
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ps.setInt(6, 12);
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ps.setInt(7, 0);
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ps.execute();
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conn.commit();
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ps.close();
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buildQuery = new String[2];
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buildQuery[0] = "";
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buildQuery[1] = "";
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insertQuery = "";
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counter = 0;
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if (!fileName.contains("relations")) {
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//s// TODO: keep counters for all entity types
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context.getCounter(REDUCES_COUNTER.TOTAL_ENTITIES).increment(entitiesPerQuery);
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} else {
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context.getCounter(REDUCES_COUNTER.TOTAL_RELATIONS).increment(entitiesPerQuery);
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}
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}catch(Exception e){
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log.error("Virtuoso write failed at query: " + insertQuery + " \n and with error " + e.toString(), e);
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try {
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if (conn != null) {
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conn.rollback();
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conn.close();
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conn = ds.getConnection();
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conn.setAutoCommit(false);
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} else {
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conn.close();
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conn = ds.getConnection();
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conn.setAutoCommit(false);
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}
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} catch (Exception e1) {
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log.error("Getting another Connection fail:" + e1.toString(), e1);
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}
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}
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}
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}
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@Override
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protected void cleanup(Context context) throws IOException, InterruptedException {
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try {
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log.info("########### \n Cleanup Started. Commiting last Triples...\n##########");
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PreparedStatement ps = conn.prepareStatement("DB.DBA.TTLP_MT (?, ?, ?, ?, ?, ?,?)");
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ps.setString(1, insertQuery);
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ps.setString(2, "");
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ps.setString(3, defaultGraph);
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final int NQUAD_LEVEL = 64;
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ps.setInt(4, NQUAD_LEVEL);
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ps.setInt(5, 0);
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ps.setInt(6, 12);
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ps.setInt(7, 0);
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ps.execute();
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conn.commit();
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ps.close();
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if (!fileName.contains("relations")) {
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//s// TODO: keep counters for all entity types
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context.getCounter(REDUCES_COUNTER.TOTAL_ENTITIES).increment(entitiesPerQuery);
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} else {
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context.getCounter(REDUCES_COUNTER.TOTAL_RELATIONS).increment(entitiesPerQuery);
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}
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} catch (Exception e) {
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log.error("Virtuoso write failed at query: " + insertQuery + " \n and with error " + e.toString(), e);
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try {
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if (conn != null) {
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conn.rollback();
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conn.close();
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conn = ds.getConnection();
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conn.setAutoCommit(false);
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PreparedStatement ps = conn.prepareStatement("DB.DBA.TTLP_MT (?, ?, ?, ?, ?, ?,?)");
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ps.setString(1, insertQuery);
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ps.setString(2, "");
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ps.setString(3, defaultGraph);
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final int NQUAD_LEVEL = 64;
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ps.setInt(4, NQUAD_LEVEL);
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ps.setInt(5, 0);
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ps.setInt(6, 12);
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ps.setInt(7, 0);
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ps.execute();
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conn.commit();
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ps.close();
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if (!fileName.contains("relations")) {
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//s// TODO: keep counters for all entity types
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context.getCounter(REDUCES_COUNTER.TOTAL_ENTITIES).increment(entitiesPerQuery);
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} else {
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context.getCounter(REDUCES_COUNTER.TOTAL_RELATIONS).increment(entitiesPerQuery);
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}
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} else {
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conn.close();
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conn = ds.getConnection();
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conn.setAutoCommit(false);
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PreparedStatement ps = conn.prepareStatement("DB.DBA.TTLP_MT (?, ?, ?, ?, ?, ?,?)");
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ps.setString(1, insertQuery);
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ps.setString(2, "");
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ps.setString(3, defaultGraph);
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final int NQUAD_LEVEL = 64;
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ps.setInt(4, NQUAD_LEVEL);
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ps.setInt(5, 0);
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ps.setInt(6, 12);
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ps.setInt(7, 0);
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ps.execute();
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conn.commit();
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ps.close();
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if (!fileName.contains("relations")) {
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//s// TODO: keep counters for all entity types
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context.getCounter(REDUCES_COUNTER.TOTAL_ENTITIES).increment(entitiesPerQuery);
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} else {
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context.getCounter(REDUCES_COUNTER.TOTAL_RELATIONS).increment(entitiesPerQuery);
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}
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}
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} catch (Exception e1) {
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log.error("Getting another Connection fail:" + e1.toString(), e1);
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}
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} finally {
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log.info("Cleaning up reducer...\nClosing Graph and Datasource");
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try {
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conn.commit();
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conn.close();
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} catch (Exception e) {
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log.error("Could not Close connection \n" + e.toString(), e);
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}
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log.info("Graph and Datasource Closed...");
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}
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}
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}
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