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package eu.dnetlib.data.mapreduce.hbase.lodExport.build;
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import com.google.common.collect.ArrayListMultimap;
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import com.google.common.collect.Multimap;
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import com.lambdaworks.redis.RedisClusterConnection;
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import com.lambdaworks.redis.RedisURI;
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import com.lambdaworks.redis.cluster.ClusterClientOptions;
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import com.lambdaworks.redis.cluster.RedisAdvancedClusterConnection;
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import com.lambdaworks.redis.cluster.RedisClusterClient;
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import eu.dnetlib.data.mapreduce.hbase.lodExport.utils.Blocking;
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import eu.dnetlib.data.mapreduce.hbase.lodExport.utils.LodConfiguration;
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import org.apache.hadoop.io.LongWritable;
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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.apache.log4j.Logger;
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import java.io.IOException;
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import java.util.ArrayList;
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import java.util.List;
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import java.util.Map;
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import java.util.concurrent.TimeUnit;
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/**
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* Mapper Class that reads HBASE contents and prepares them for the StatsDB
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* export
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*/
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/*
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-> Parse LOD dump files
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Process lod input files and divide by entity type (both source and target)
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Transform to id, array of [ properties] format
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Store to HDFS
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For -> Multiple outputs and inputs
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Multiple inputs: all source and target datasets and their corresponding mappings
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M/O: separate output files for each dataset: mark records so that they are written to the correct one
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*/
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public class SourceBuildMapper extends Mapper<LongWritable, Text, Text, Text> {
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private Logger log = Logger.getLogger(this.getClass());
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//address of your redis server
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private String redisHost;
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private Integer redisPort;
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private LodConfiguration lodConfiguration;
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private String lastExecutionDate;
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// private StatefulRedisClusterConnection connection;
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private RedisClusterClient clusterClient;
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// private RedisAdvancedClusterCommands<String, String> syncCommands;
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RedisClusterConnection<String, String> connection;
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public static enum ENTITIES_COUNTER {
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BLOCKING_KEYS,
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REDIS_RECORDS
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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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lodConfiguration = new LodConfiguration();
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lodConfiguration.load(context.getConfiguration().get("lod.sourceMappings"));
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redisHost = context.getConfiguration().get("lod.redisHost");
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redisPort = Integer.parseInt(context.getConfiguration().get("lod.redisPort"));
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// initLettuceRedis();
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}
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private void initLettuceRedis() {
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RedisURI redisUri = RedisURI.Builder.redis(redisHost).withPort(redisPort).build();
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clusterClient = RedisClusterClient.create(redisUri);
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clusterClient.setOptions(new ClusterClientOptions.Builder()
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.refreshClusterView(true)
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.refreshPeriod(1, TimeUnit.MINUTES)
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.build());
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RedisClusterConnection<String, String> connection = clusterClient.connectCluster();
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System.out.println("Connected to Redis");
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/* connection = clusterClient.connect();
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syncCommands = connection.sync();*/
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}
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@Override
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protected void map(final LongWritable keyIn, final Text result, final Context context) throws IOException {
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try {
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//get ID - output source_recordID so we can group by id and get all props of a record
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StringBuffer value = new StringBuffer();
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Multimap<String, String> Fields = ArrayListMultimap.create();
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String[] pairs = result.toString().split(",");
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for (int i = 0; i < pairs.length; i += 2) {
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if (i + 1 < pairs.length) Fields.put(pairs[i], pairs[i + 1]);
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}
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//get ID
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String id = "source_" + (String) ((List) Fields.get("id")).get(0);
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for (Map.Entry<String, String> entry : Fields.entries()) {
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// if (lodConfiguration.isValidField(entityType, entry.getKey().replace("/", "\\/")))
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{
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value.append(entry.getKey() + "\t" + entry.getValue() + ",");
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}
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}
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//Write to cache
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// writeToRedis(id, value.toString());
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context.getCounter(ENTITIES_COUNTER.REDIS_RECORDS).increment(1);
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ArrayList<String> blockingKeys = Blocking.tokenBlocking(Fields);
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for (String blockingKey : blockingKeys) {
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//Write BlockingKey, RecordID to output
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context.write(new Text(blockingKey), new Text(id));
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context.getCounter(ENTITIES_COUNTER.BLOCKING_KEYS).increment(1);
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}
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} catch (Exception e) {
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log.error("Error writing entity to M/R output", e);
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log.error("result error " + result.toString());
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throw new RuntimeException(e);
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}
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}
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private void writeToRedis(String key, String value) throws Exception {
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try {
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//syncCommands.set(key, value);
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connection.set(key, value)
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; //jedisCluster.set(key, value);
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log.info("Writing out to redis " + key + " , " + value);
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} catch (Exception e) {
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log.error("Error writing entity to Redis", e);
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throw new RuntimeException("Error writing to Redis ", e);
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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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// connection.close();
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//clusterClient.shutdown();
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super.cleanup(context);
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}
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public Logger getLog() {
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return log;
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}
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public void setLog(Logger log) {
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this.log = log;
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}
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public String getRedisHost() {
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return redisHost;
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}
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public void setRedisHost(String redisHost) {
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this.redisHost = redisHost;
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}
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public Integer getRedisPort() {
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return redisPort;
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}
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public void setRedisPort(Integer redisPort) {
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this.redisPort = redisPort;
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}
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public LodConfiguration getLodConfiguration() {
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return lodConfiguration;
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}
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public void setLodConfiguration(LodConfiguration lodConfiguration) {
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this.lodConfiguration = lodConfiguration;
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}
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public String getLastExecutionDate() {
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return lastExecutionDate;
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}
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public void setLastExecutionDate(String lastExecutionDate) {
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this.lastExecutionDate = lastExecutionDate;
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}
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}
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