forked from D-Net/dnet-hadoop
135 lines
4.0 KiB
Java
135 lines
4.0 KiB
Java
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package eu.dnetlib.dhp.collection;
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import static eu.dnetlib.dhp.common.Constants.SEQUENCE_FILE_NAME;
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import java.io.IOException;
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import java.util.Optional;
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import java.util.concurrent.atomic.AtomicInteger;
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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 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.apache.hadoop.io.compress.DeflateCodec;
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import org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import eu.dnetlib.dhp.aggregation.common.AggregatorReport;
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import eu.dnetlib.dhp.aggregation.common.ReporterCallback;
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import eu.dnetlib.dhp.aggregation.common.ReportingJob;
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import eu.dnetlib.dhp.collection.plugin.CollectorPlugin;
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import eu.dnetlib.dhp.collection.plugin.mongodb.MDStoreCollectorPlugin;
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import eu.dnetlib.dhp.collection.plugin.mongodb.MongoDbDumpCollectorPlugin;
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import eu.dnetlib.dhp.collection.plugin.oai.OaiCollectorPlugin;
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import eu.dnetlib.dhp.collection.plugin.rest.RestCollectorPlugin;
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import eu.dnetlib.dhp.schema.mdstore.MDStoreVersion;
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public class CollectorWorker extends ReportingJob {
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private static final Logger log = LoggerFactory.getLogger(CollectorWorker.class);
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private final ApiDescriptor api;
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private final FileSystem fileSystem;
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private final MDStoreVersion mdStoreVersion;
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private final HttpClientParams clientParams;
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public CollectorWorker(
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final ApiDescriptor api,
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final FileSystem fileSystem,
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final MDStoreVersion mdStoreVersion,
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final HttpClientParams clientParams,
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final AggregatorReport report) {
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super(report);
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this.api = api;
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this.fileSystem = fileSystem;
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this.mdStoreVersion = mdStoreVersion;
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this.clientParams = clientParams;
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}
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public void collect() throws UnknownCollectorPluginException, CollectorException, IOException {
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final String outputPath = mdStoreVersion.getHdfsPath() + SEQUENCE_FILE_NAME;
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log.info("outputPath path is {}", outputPath);
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final CollectorPlugin plugin = getCollectorPlugin();
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final AtomicInteger counter = new AtomicInteger(0);
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scheduleReport(counter);
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try (SequenceFile.Writer writer = SequenceFile
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.createWriter(
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fileSystem.getConf(),
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SequenceFile.Writer.file(new Path(outputPath)),
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SequenceFile.Writer.keyClass(IntWritable.class),
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SequenceFile.Writer.valueClass(Text.class),
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SequenceFile.Writer.compression(SequenceFile.CompressionType.BLOCK, new DeflateCodec()))) {
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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
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.collect(api, report)
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.forEach(
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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 (Throwable e) {
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throw new RuntimeException(e);
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}
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});
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} catch (Throwable e) {
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report.put(e.getClass().getName(), e.getMessage());
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throw new CollectorException(e);
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} finally {
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shutdown();
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report.ongoing(counter.longValue(), counter.longValue());
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}
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}
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private void scheduleReport(AtomicInteger counter) {
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schedule(new ReporterCallback() {
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@Override
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public Long getCurrent() {
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return counter.longValue();
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}
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@Override
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public Long getTotal() {
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return null;
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}
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});
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}
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private CollectorPlugin getCollectorPlugin() throws UnknownCollectorPluginException {
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switch (CollectorPlugin.NAME.valueOf(api.getProtocol())) {
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case oai:
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return new OaiCollectorPlugin(clientParams);
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case rest_json2xml:
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return new RestCollectorPlugin(clientParams);
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case other:
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final CollectorPlugin.NAME.OTHER_NAME plugin = Optional
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.ofNullable(api.getParams().get("other_plugin_type"))
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.map(CollectorPlugin.NAME.OTHER_NAME::valueOf)
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.get();
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switch (plugin) {
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case mdstore_mongodb_dump:
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return new MongoDbDumpCollectorPlugin(fileSystem);
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case mdstore_mongodb:
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return new MDStoreCollectorPlugin();
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default:
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throw new UnknownCollectorPluginException("plugin is not managed: " + plugin);
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}
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default:
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throw new UnknownCollectorPluginException("protocol is not managed: " + api.getProtocol());
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}
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}
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}
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