forked from D-Net/dnet-hadoop
106 lines
3.3 KiB
Java
106 lines
3.3 KiB
Java
package eu.dnetlib.collector.worker;
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import org.apache.hadoop.io.IntWritable;
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import org.apache.hadoop.io.SequenceFile;
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import org.apache.hadoop.io.Text;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import org.springframework.beans.factory.annotation.Autowired;
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import org.springframework.boot.CommandLineRunner;
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import org.springframework.boot.SpringApplication;
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import org.springframework.boot.autoconfigure.SpringBootApplication;
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import com.fasterxml.jackson.databind.ObjectMapper;
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import eu.dnetlib.collector.worker.model.ApiDescriptor;
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import eu.dnetlib.collector.worker.plugins.CollectorPlugin;
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import eu.dnetlib.collector.worker.utils.CollectorPluginEnumerator;
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import org.apache.hadoop.conf.Configuration;
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import org.apache.hadoop.fs.FSDataOutputStream;
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import org.apache.hadoop.fs.FileSystem;
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import org.apache.hadoop.fs.Path;
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import java.io.IOException;
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import java.net.URI;
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import java.util.concurrent.atomic.AtomicInteger;
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import java.util.stream.Stream;
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@SpringBootApplication
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public class DnetCollectorWorkerApplication implements CommandLineRunner {
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private static final Logger log = LoggerFactory.getLogger(DnetCollectorWorkerApplication.class);
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@Autowired
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private CollectorPluginEnumerator collectorPluginEnumerator;
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/**
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*
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* @param args
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*/
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public static void main(final String[] args) {
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SpringApplication.run(DnetCollectorWorkerApplication.class, args);
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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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public void run(final String... args) throws Exception {
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if (args.length == 0) { return; }
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if (args.length != 2) { throw new DnetCollectorException("Invalid number of parameters, expected: hdfs_path and json_api_description"); }
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final String hdfsPath = args[0];
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log.info("hdfsPath ="+hdfsPath);
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final String json = args[1];
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log.info("json = "+json);
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final ObjectMapper jsonMapper = new ObjectMapper();
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final ApiDescriptor api = jsonMapper.readValue(json, ApiDescriptor.class);
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final CollectorPlugin plugin = collectorPluginEnumerator.getPluginByProtocol(api.getProtocol());
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final String hdfsuri ="hdfs://hadoop-rm1.garr-pa1.d4science.org:8020";
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// ====== Init HDFS File System Object
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Configuration conf = new Configuration();
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// Set FileSystem URI
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conf.set("fs.defaultFS", hdfsuri);
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// Because of Maven
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conf.set("fs.hdfs.impl", org.apache.hadoop.hdfs.DistributedFileSystem.class.getName());
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conf.set("fs.file.impl", org.apache.hadoop.fs.LocalFileSystem.class.getName());
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// Set HADOOP user
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System.setProperty("HADOOP_USER_NAME", "sandro.labruzzo");
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System.setProperty("hadoop.home.dir", "/");
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//Get the filesystem - HDFS
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FileSystem fs = FileSystem.get(URI.create(hdfsuri), conf);
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Path hdfswritepath = new Path(hdfsPath);
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log.info("Created path "+hdfswritepath.toString());
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try(SequenceFile.Writer writer = SequenceFile.createWriter(conf,
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SequenceFile.Writer.file(hdfswritepath), SequenceFile.Writer.keyClass(IntWritable.class),
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SequenceFile.Writer.valueClass(Text.class))) {
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final AtomicInteger counter = new AtomicInteger(0);
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final IntWritable key = new IntWritable(counter.get());
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final Text value = new Text();
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plugin.collect(api).forEach(content -> {
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key.set(counter.getAndIncrement());
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value.set(content);
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try {
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writer.append(key, value);
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} catch (IOException e) {
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throw new RuntimeException(e);
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}
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});
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}
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}
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}
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