129 lines
4.4 KiB
Java
129 lines
4.4 KiB
Java
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package eu.dnetlib.dhp.oa.graph.dump.complete;
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import java.io.BufferedWriter;
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import java.io.IOException;
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import java.io.OutputStreamWriter;
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import java.io.Serializable;
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import java.nio.charset.StandardCharsets;
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import java.util.List;
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import java.util.Objects;
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import java.util.Optional;
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import java.util.function.Consumer;
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import java.util.function.Function;
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import org.apache.commons.io.IOUtils;
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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 org.slf4j.Logger;
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import org.slf4j.LoggerFactory;
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import eu.dnetlib.dhp.application.ArgumentApplicationParser;
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import eu.dnetlib.dhp.oa.graph.dump.Utils;
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import eu.dnetlib.dhp.oa.graph.dump.exceptions.MyRuntimeException;
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import eu.dnetlib.dhp.oa.model.graph.*;
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import eu.dnetlib.dhp.schema.common.ModelSupport;
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import eu.dnetlib.dhp.schema.oaf.Datasource;
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import eu.dnetlib.enabling.is.lookup.rmi.ISLookUpException;
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/**
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* Writes the set of new Relation between the context and datasources. At the moment the relation between the context
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* and the project is not created because of a low coverage in the profiles of openaire ids related to projects
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*/
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public class CreateContextRelation implements Serializable {
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private static final Logger log = LoggerFactory.getLogger(CreateContextRelation.class);
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private final transient Configuration conf;
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private final transient BufferedWriter writer;
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private final transient QueryInformationSystem queryInformationSystem;
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private static final String CONTEX_RELATION_DATASOURCE = "contentproviders";
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private static final String CONTEX_RELATION_PROJECT = "projects";
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public static void main(String[] args) throws Exception {
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String jsonConfiguration = IOUtils
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.toString(
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Objects
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.requireNonNull(
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CreateContextRelation.class
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.getResourceAsStream(
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"/eu/dnetlib/dhp/oa/graph/dump/input_entity_parameter.json")));
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final ArgumentApplicationParser parser = new ArgumentApplicationParser(jsonConfiguration);
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parser.parseArgument(args);
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Boolean isSparkSessionManaged = Optional
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.ofNullable(parser.get("isSparkSessionManaged"))
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.map(Boolean::valueOf)
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.orElse(Boolean.TRUE);
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log.info("isSparkSessionManaged: {}", isSparkSessionManaged);
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final String hdfsPath = parser.get("hdfsPath");
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log.info("hdfsPath: {}", hdfsPath);
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final String hdfsNameNode = parser.get("nameNode");
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log.info("nameNode: {}", hdfsNameNode);
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final String isLookUpUrl = parser.get("isLookUpUrl");
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log.info("isLookUpUrl: {}", isLookUpUrl);
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final CreateContextRelation cce = new CreateContextRelation(hdfsPath, hdfsNameNode, isLookUpUrl);
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log.info("Creating relation for datasource...");
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cce.execute(Process::getRelation, CONTEX_RELATION_DATASOURCE, ModelSupport.getIdPrefix(Datasource.class));
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log.info("Creating relations for projects... ");
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cce
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.execute(
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Process::getRelation, CONTEX_RELATION_PROJECT,
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ModelSupport.getIdPrefix(eu.dnetlib.dhp.schema.oaf.Project.class));
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cce.close();
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}
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private void close() throws IOException {
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writer.close();
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}
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public CreateContextRelation(String hdfsPath, String hdfsNameNode, String isLookUpUrl)
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throws IOException, ISLookUpException {
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this.conf = new Configuration();
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this.conf.set("fs.defaultFS", hdfsNameNode);
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queryInformationSystem = new QueryInformationSystem();
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queryInformationSystem.setIsLookUp(Utils.getIsLookUpService(isLookUpUrl));
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queryInformationSystem.execContextRelationQuery();
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FileSystem fileSystem = FileSystem.get(this.conf);
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Path hdfsWritePath = new Path(hdfsPath);
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FSDataOutputStream fsDataOutputStream = null;
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if (fileSystem.exists(hdfsWritePath)) {
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fsDataOutputStream = fileSystem.append(hdfsWritePath);
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} else {
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fsDataOutputStream = fileSystem.create(hdfsWritePath);
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}
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this.writer = new BufferedWriter(new OutputStreamWriter(fsDataOutputStream, StandardCharsets.UTF_8));
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}
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public void execute(final Function<ContextInfo, List<Relation>> producer, String category, String prefix) {
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final Consumer<ContextInfo> consumer = ci -> producer.apply(ci).forEach(this::writeEntity);
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queryInformationSystem.getContextRelation(consumer, category, prefix);
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}
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protected void writeEntity(final Relation r) {
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try {
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writer.write(Utils.OBJECT_MAPPER.writeValueAsString(r));
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writer.newLine();
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} catch (final Exception e) {
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throw new MyRuntimeException(e);
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}
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}
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}
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