285 lines
9.3 KiB
Java
285 lines
9.3 KiB
Java
package eu.dnetlib.ariadneplus.graphdb;
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import java.time.LocalDateTime;
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import org.apache.commons.io.IOUtils;
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import org.apache.commons.lang3.StringUtils;
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import org.apache.commons.logging.Log;
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import org.apache.commons.logging.LogFactory;
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import org.eclipse.rdf4j.RDF4JException;
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import org.eclipse.rdf4j.model.IRI;
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import org.eclipse.rdf4j.model.Statement;
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import org.eclipse.rdf4j.model.ValueFactory;
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import org.eclipse.rdf4j.query.*;
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import org.eclipse.rdf4j.repository.Repository;
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import org.eclipse.rdf4j.repository.RepositoryConnection;
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import org.eclipse.rdf4j.repository.manager.RemoteRepositoryManager;
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import org.eclipse.rdf4j.repository.util.Repositories;
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import org.eclipse.rdf4j.rio.RDFFormat;
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import eu.dnetlib.ariadneplus.publisher.AriadnePlusPublisherException;
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import eu.dnetlib.ariadneplus.rdf.RecordParserHelper;
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import net.sf.saxon.s9api.SaxonApiException;
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/**
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* @author enrico.ottonello
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*
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*/
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public class GraphDBClient {
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private static final Log log = LogFactory.getLog(GraphDBClient.class);
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public static final String PROVENANCE_NS = "http://www.d-net.research-infrastructures.eu/provenance/";
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public static final int NUM_RECORDS_THRESHOLD = 10;
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private RecordParserHelper recordParserHelper;
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private String graphDBServerUrl;
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private String graphDBBaseURI;
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private String writerUser;
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private String writerPwd;
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private String repository;
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protected GraphDBClient(final RecordParserHelper recordParserHelper,
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final String graphDBServerUrl, final String graphDBBaseURI, final String writerUser, final String writerPwd, final String repository) {
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this.recordParserHelper = recordParserHelper;
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this.graphDBServerUrl = graphDBServerUrl;
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this.graphDBBaseURI = graphDBBaseURI;
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this.writerUser = writerUser;
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this.writerPwd = writerPwd;
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this.repository = repository;
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}
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public long feed(final String record) throws AriadnePlusPublisherException{
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try {
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String objIdentifier = recordParserHelper.getObjIdentifier(record);
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if (StringUtils.isBlank(objIdentifier)) {
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log.warn("Got record with no objIdentifier -- skipping");
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return 0;
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}
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log.debug("init connection to graphDBServerUrl " + this.graphDBServerUrl);
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RemoteRepositoryManager manager = new RemoteRepositoryManager(this.graphDBServerUrl);
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manager.init();
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manager.setUsernameAndPassword(getWriterUser(), getWriterPwd());
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log.debug("manager init");
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Repository repository = manager.getRepository(getRepository());
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ValueFactory factory = repository.getValueFactory();
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String datasourceApi = recordParserHelper.getDatasourceApi(record);
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IRI graph = factory.createIRI(getGraphDBBaseURI(), datasourceApi);
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try (RepositoryConnection con = repository.getConnection()) {
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log.debug("connection established");
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con.begin();
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String recordURI = getRecordURI(objIdentifier, datasourceApi);
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log.debug("Trying to adding record with recordURI " + recordURI + " into graph " + graph);
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con.add(IOUtils.toInputStream(getRDFBlock(record), "UTF-8"), recordURI, RDFFormat.RDFXML, graph);
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con.commit();
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log.debug("statement added");
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con.close();
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}
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catch (RDF4JException e) {
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log.error("error adding statement ...", e);
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}
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repository.shutDown();
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manager.shutDown();
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log.debug("manager shutDown");
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return 1;
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}catch(Throwable e){
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log.error(e);
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throw new AriadnePlusPublisherException(e);
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}
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}
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public long feedProvenance(final String datasource, final String datasourceApi) throws AriadnePlusPublisherException {
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try {
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log.debug("init connection to graphDBServerUrl " + this.graphDBServerUrl);
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RemoteRepositoryManager manager = new RemoteRepositoryManager(this.graphDBServerUrl);
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manager.init();
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manager.setUsernameAndPassword(getWriterUser(), getWriterPwd());
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log.debug("manager init");
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Repository repository = manager.getRepository(getRepository());
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ValueFactory factory = repository.getValueFactory();
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IRI IS_API_OF = factory.createIRI(PROVENANCE_NS, "isApiOf");
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IRI INSERTED_IN_DATE = factory.createIRI(PROVENANCE_NS, "insertedInDate");
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IRI rApi = factory.createIRI(getGraphDBBaseURI(), datasourceApi);
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Statement stmApi = factory.createStatement(rApi, IS_API_OF, factory.createLiteral(datasource));
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LocalDateTime now = LocalDateTime.now();
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Statement stmInsertedDate = factory.createStatement(rApi, INSERTED_IN_DATE, factory.createLiteral(now.toString()));
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IRI datasourceApisGraph = factory.createIRI(getGraphDBBaseURI(), "datasourceApis");
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try (RepositoryConnection con = repository.getConnection()) {
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con.begin();
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log.debug("Adding stmt " + stmApi.toString() + " into graph " + datasourceApisGraph.toString());
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con.remove(rApi, INSERTED_IN_DATE, null, datasourceApisGraph);
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con.add(stmApi, datasourceApisGraph);
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log.debug("Adding stmt " + stmInsertedDate.toString() + " into graph " + datasourceApisGraph.toString());
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con.add(stmInsertedDate, datasourceApisGraph);
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con.commit();
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log.debug("statements added");
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con.close();
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}
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catch (RDF4JException e) {
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log.error("error adding statement ...", e);
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throw new AriadnePlusPublisherException(e);
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}
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repository.shutDown();
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manager.shutDown();
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return 200;
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}
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catch(Throwable e){
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log.error(e);
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throw new AriadnePlusPublisherException(e);
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}
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}
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public long dropDatasourceApiGraph(final String datasourceApi) throws AriadnePlusPublisherException {
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try {
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log.debug("init connection to graphDBServerUrl " + this.graphDBServerUrl);
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RemoteRepositoryManager manager = new RemoteRepositoryManager(this.graphDBServerUrl);
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manager.init();
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manager.setUsernameAndPassword(getWriterUser(), getWriterPwd());
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Repository repository = manager.getRepository(getRepository());
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if (repository==null) {
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throw new AriadnePlusPublisherException("GraphDB repository not found");
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}
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ValueFactory factory = repository.getValueFactory();
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IRI rApi = factory.createIRI(getGraphDBBaseURI(), datasourceApi);
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try (RepositoryConnection con = repository.getConnection()) {
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log.debug("removing namedGraph: " + rApi);
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Repositories.consume(repository, conn -> conn.clear(rApi));
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}
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catch (RDF4JException e) {
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log.error("error removing datasourceApi partition info ", e);
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throw new AriadnePlusPublisherException(e);
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}
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repository.shutDown();
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manager.shutDown();
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return 200;
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}
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catch(Throwable e){
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log.error("error removing datasourceApi partition info ", e);
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throw new AriadnePlusPublisherException(e);
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}
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}
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private String getRecordURI(final String objIdentifier, final String datasourceApi) {
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return "/" + datasourceApi + "/" + objIdentifier;
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}
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public RecordParserHelper getRecordParserHelper() {
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return recordParserHelper;
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}
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public void setRecordParserHelper(final RecordParserHelper recordParserHelper) {
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this.recordParserHelper = recordParserHelper;
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}
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public void setDefaultBaseURI(final String defaultBaseURI) {
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this.graphDBServerUrl = defaultBaseURI;
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}
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public String getRDFBlock(final String record) throws SaxonApiException{
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recordParserHelper.init();
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try {
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if (StringUtils.isBlank(record)) {
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log.warn("Got empty record");
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return "";
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}
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String objIdentifier = recordParserHelper.getObjIdentifier(record);
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if (StringUtils.isBlank(objIdentifier)) {
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log.warn("Got record with no objIdentifier -- skipping");
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return "";
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}
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String rdfBlock = recordParserHelper.getRDF(record);
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if (StringUtils.isBlank(rdfBlock)) {
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log.warn("Missing rdf:RDF in record with objIdentifier " + objIdentifier);
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}
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return rdfBlock;
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}catch(Throwable e){
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log.error(e);
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throw e;
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}
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}
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public String getGraphDBBaseURI() {
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return graphDBBaseURI;
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}
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public void setGraphDBBaseURI(String graphDBBaseURI) {
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this.graphDBBaseURI = graphDBBaseURI;
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}
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public String getWriterUser() {
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return writerUser;
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}
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public void setWriterUser(String writerUser) {
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this.writerUser = writerUser;
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}
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public String getWriterPwd() {
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return writerPwd;
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}
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public void setWriterPwd(String writerPwd) {
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this.writerPwd = writerPwd;
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}
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public String getRepository() {
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return repository;
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}
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public void setRepository(String repository) {
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this.repository = repository;
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}
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public String updateSparql(final String queryValue) throws AriadnePlusPublisherException{
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try {
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String result = new String("");
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log.debug("init connection to graphDBServerUrl " + this.graphDBServerUrl);
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RemoteRepositoryManager manager = new RemoteRepositoryManager(this.graphDBServerUrl);
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manager.init();
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manager.setUsernameAndPassword(getWriterUser(), getWriterPwd());
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log.debug("manager init");
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Repository repository = manager.getRepository(getRepository());
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ValueFactory factory = repository.getValueFactory();
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try (RepositoryConnection con = repository.getConnection()) {
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log.debug("connection established");
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con.begin();
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Update updateResultQuery = con.prepareUpdate(queryValue);
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if (updateResultQuery!=null) {
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updateResultQuery.execute();
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result = "updated";
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}
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else {
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result = "No result.";
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}
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log.debug("query result: "+result);
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con.commit();
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log.debug("query executed");
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con.close();
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}
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catch (RDF4JException e) {
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log.error("error executing query ...", e);
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}
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repository.shutDown();
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manager.shutDown();
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log.debug("manager shutDown");
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return result;
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}catch(Throwable e){
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log.error(e);
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throw new AriadnePlusPublisherException(e);
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}
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}
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}
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