D-Net

package eu.dnetlib.data.mapreduce.hbase.index;

import java.io.IOException;

import java.util.List;

import java.util.Map;

import java.util.Map.Entry;

import org.apache.commons.collections.MapUtils;

import org.apache.commons.logging.Log;

import org.apache.commons.logging.LogFactory;

import org.apache.hadoop.conf.Configuration;

import org.apache.hadoop.hbase.client.Result;

import org.apache.hadoop.hbase.io.ImmutableBytesWritable;

import org.apache.hadoop.hbase.mapreduce.TableMapper;

import org.apache.hadoop.hbase.util.Bytes;

import org.apache.hadoop.io.Text;

import org.apache.solr.client.solrj.SolrServerException;

import org.apache.solr.client.solrj.impl.CloudSolrClient;

import org.apache.solr.client.solrj.response.SolrPingResponse;

import org.apache.solr.client.solrj.response.UpdateResponse;

import org.apache.solr.common.SolrInputDocument;

import org.dom4j.DocumentException;

import com.google.common.collect.Lists;

import com.googlecode.protobuf.format.JsonFormat;

import eu.dnetlib.data.mapreduce.JobParams;

import eu.dnetlib.data.mapreduce.util.DedupUtils;

import eu.dnetlib.data.proto.OafProtos.Oaf;

import eu.dnetlib.data.transform.SolrProtoMapper;

import eu.dnetlib.functionality.index.solr.feed.InputDocumentFactory;

import eu.dnetlib.miscutils.datetime.HumanTime;

public class DedupIndexFeedMapper extends TableMapper<Text, Text> {

	private static final Log log = LogFactory.getLog(DedupIndexFeedMapper.class); // NOPMD by marko on 11/24/08 5:02 PM

	private CloudSolrClient solrServer;

	private String dsId;

	private String version;

	private int shutdownWaitTime = 10000;

	private int bufferFlushThreshold = 100;

	private List<SolrInputDocument> buffer;

	private int backoffTimeMs = 5000;

	private boolean simulation = false;

	private String entityType = null;

	private String actionset = null;

	private SolrProtoMapper mapper = null;

	private final static int MAX_RETRIES = 10;

	@Override

	protected void setup(final Context context) throws IOException, InterruptedException {

		logConfiguration(context.getConfiguration());

		shutdownWaitTime = Integer.parseInt(context.getConfiguration().get(JobParams.INDEX_SHUTDOWN_WAIT));

		bufferFlushThreshold = Integer.parseInt(context.getConfiguration().get(JobParams.INDEX_BUFFER_FLUSH_TRESHOLD));

		dsId = context.getConfiguration().get(JobParams.INDEX_DSID);

		version = InputDocumentFactory.getParsedDateField(context.getConfiguration().get(JobParams.INDEX_FEED_TIME));

		buffer = Lists.newArrayList();

		simulation = Boolean.parseBoolean(context.getConfiguration().get(JobParams.INDEX_FEED_SIMULATION_MODE));

		entityType = context.getConfiguration().get("entityType");

		actionset = context.getConfiguration().get("actionset");

		final String fields = context.getConfiguration().get("index.fields");

		log.info("got fields: \n" + fields);

		log.info("got dsId: " + dsId);

		log.info("got version: " + version);

		log.info("simulation: " + simulation);

		log.info("entityType: " + entityType);

		log.info("actionset: " + actionset);

		log.info("buffer size: " + bufferFlushThreshold);

		try {

			mapper = new SolrProtoMapper(fields);

		} catch (final DocumentException e) {

			log.error("unable to parse fields: " + fields);

			throw new IllegalArgumentException(e);

		}

		final String baseURL = context.getConfiguration().get(JobParams.INDEX_SOLR_URL);

		log.info("solr server baseURL: " + baseURL);

		final String collection = context.getConfiguration().get(JobParams.INDEX_SOLR_COLLECTION);

		log.info("solr server collection: " + collection);

		while (true) {

			try {

				log.info("initializing solr server...");

				solrServer = new CloudSolrClient.Builder()

					.withZkHost(baseURL)

					.build();

				solrServer.connect();

				solrServer.setParallelUpdates(true);

				solrServer.setDefaultCollection(collection);

				final SolrPingResponse rsp = solrServer.ping();

				if (rsp.getStatus() != 0) throw new SolrServerException("bad init status: " + rsp.getStatus());

				else {

					break;

				}

			} catch (final Throwable e) {

				if (solrServer != null) {

					solrServer.close();

				}

				context.getCounter("index init", e.getMessage()).increment(1);

				log.info(String.format("failed to init solr client wait %dms", backoffTimeMs));

				Thread.sleep(backoffTimeMs);

			}

		}

	}

	@Override

	protected void map(final ImmutableBytesWritable key, final Result value, final Context context) throws IOException, InterruptedException {

		SolrInputDocument doc = null;

		final Map<byte[], byte[]> bMap = value.getFamilyMap(Bytes.toBytes(entityType));

		if (MapUtils.isEmpty(bMap) || !bMap.containsKey(DedupUtils.BODY_B)) {

			context.getCounter(entityType, "missing body");

			return;

		}

		final Oaf oaf = Oaf.parseFrom(bMap.get(DedupUtils.BODY_B));

		try {

			doc = getDocument(oaf);

		} catch (final Throwable e) {

			handleError(key, new JsonFormat().printToString(oaf), context, doc, e);

			return;

		}

		int retries = 0;

		while (retries < MAX_RETRIES) {

			try {

				addDocument(context, doc);

				return;

			} catch (final Throwable e) {

				retries++;

				context.getCounter("index feed", "retries").increment(1);

				handleError(key, new JsonFormat().printToString(oaf), context, doc, e);

				log.info(String.format("failed to feed documents, waiting %dms", backoffTimeMs));

				Thread.sleep(backoffTimeMs);

			}

		}

		if (retries >= MAX_RETRIES)

			throw new IOException("too many retries: " + retries);

	}

	private SolrInputDocument getDocument(final Oaf oaf) throws DocumentException {

		final SolrInputDocument document = mapper.map(oaf, version, dsId, actionset);

		document.addField("actionset", actionset);

		return document;

	}

	private void addDocument(final Context context, final SolrInputDocument doc) throws SolrServerException, IOException {

		if (!doc.isEmpty()) {

			buffer.add(doc);

			if (buffer.size() >= bufferFlushThreshold) {

				doAdd(buffer, context);

				// Thread.sleep(100);

			}

		} else {

			context.getCounter("index feed", "skipped records").increment(1);

		}

	}

	private void doAdd(final List<SolrInputDocument> buffer, final Context context) throws SolrServerException, IOException {

		if (!simulation) {

			final long start = System.currentTimeMillis();

			final UpdateResponse rsp = solrServer.add(buffer);

			final long stop = System.currentTimeMillis() - start;

			log.info("feed time for " + buffer.size() + " records : " + HumanTime.exactly(stop) + "\n");

			final int status = rsp.getStatus();

			context.getCounter("index feed", "status code: " + status).increment(buffer.size());

			if (status != 0) throw new SolrServerException("bad status: " + status);

		}

		buffer.clear();

	}

	@Override

	protected void cleanup(final Context context) throws IOException, InterruptedException {

		super.cleanup(context);

		try {

			if (!buffer.isEmpty()) {

				doAdd(buffer, context);

			}

			log.info("\nwaiting " + shutdownWaitTime + "ms before shutdown");

			Thread.sleep(shutdownWaitTime);

			solrServer.close();

		} catch (final SolrServerException e) {

			System.err.println("couldn't shutdown server " + e.getMessage());

		}

	}

	private void handleError(final ImmutableBytesWritable key, final String value, final Context context, final SolrInputDocument doc, final Throwable e)

			throws IOException, InterruptedException {

		context.getCounter("index feed", e.getClass().getName()).increment(1);

		context.write(new Text(key.copyBytes()), printRottenRecord(context.getTaskAttemptID().toString(), value, doc));

		// e.printStackTrace(System.err);

	}

	private Text printRottenRecord(final String taskid, final String value, final SolrInputDocument doc) {

		return new Text("\n**********************************\n" + "task: " + taskid + "\n"

				+ check("original", value.toString() + check("solrDoc", doc)));

	}

	private String check(final String label, final Object value) {

		if ((value != null) && !value.toString().isEmpty()) return "\n " + label + ":\n" + value + "\n";

		return "\n";

	}

	private void logConfiguration(final Configuration conf) {

		log.info("job configutation #################");

		for (final Entry<String, String> e : conf) {

			log.info("'" + e.getKey() + "' : '" + e.getValue() + "'");

		}

		log.info("end of job configutation #################\n\n");

	}

}