439 lines
25 KiB
Java
439 lines
25 KiB
Java
package eu.openaire.urls_controller.services;
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import eu.openaire.urls_controller.components.BulkImport;
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import eu.openaire.urls_controller.configuration.ImpalaConnector;
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import eu.openaire.urls_controller.models.*;
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import eu.openaire.urls_controller.payloads.responces.AssignmentsResponse;
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import eu.openaire.urls_controller.util.FileUtils;
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import eu.openaire.urls_controller.util.ParquetFileUtils;
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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.beans.factory.annotation.Value;
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import org.springframework.http.HttpStatus;
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import org.springframework.http.ResponseEntity;
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import org.springframework.jdbc.core.JdbcTemplate;
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import org.springframework.stereotype.Service;
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import javax.servlet.http.HttpServletRequest;
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import java.io.File;
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import java.nio.file.Files;
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import java.nio.file.Paths;
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import java.sql.Connection;
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import java.sql.PreparedStatement;
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import java.sql.SQLException;
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import java.sql.Timestamp;
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import java.util.ArrayList;
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import java.util.HashMap;
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import java.util.List;
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import java.util.concurrent.Callable;
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import java.util.concurrent.ExecutorService;
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import java.util.concurrent.Executors;
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import java.util.concurrent.Future;
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import java.util.concurrent.atomic.AtomicInteger;
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import java.util.concurrent.atomic.AtomicLong;
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@Service
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public class UrlsServiceImpl implements UrlsService {
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private static final Logger logger = LoggerFactory.getLogger(UrlsServiceImpl.class);
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@Autowired
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private JdbcTemplate jdbcTemplate;
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@Autowired
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private FileUtils fileUtils;
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@Autowired
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private ParquetFileUtils parquetFileUtils;
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public static final AtomicLong assignmentsBatchCounter = new AtomicLong(0);
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private final AtomicInteger maxAttemptsPerRecordAtomic;
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private static String excludedDatasourceIDsStringList = null;
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public static final ExecutorService insertsExecutor = Executors.newFixedThreadPool(6);
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// TODO - Unify this ExecutorService with the hash-matching executorService. Since one will ALWAYS be called after the other. So why having two ExecServices to handle?
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public UrlsServiceImpl(@Value("${services.pdfaggregation.controller.maxAttemptsPerRecord}") int maxAttemptsPerRecord, BulkImport bulkImport)
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{
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maxAttemptsPerRecordAtomic = new AtomicInteger(maxAttemptsPerRecord);
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HashMap<String, BulkImport.BulkImportSource> bulkImportSources = new HashMap<>(bulkImport.getBulkImportSources());
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// The "bulkImportSources" will not be null, as it will be defined inside the "application.yml" file.
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// In case no bulkImport Datasources are given, then the "bulkImportSources" list will just be empty.
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if ( bulkImportSources.isEmpty() )
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return; // So the "excludedDatasourceIDsStringList" -code should be placed last in this Constructor-method.
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if ( logger.isTraceEnabled() )
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logger.trace("BulkImportSources:\n" + bulkImportSources);
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List<String> excludedIDs = new ArrayList<>();
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for ( BulkImport.BulkImportSource source : bulkImportSources.values() ) {
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String datasourceID = source.getDatasourceID();
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if ( (datasourceID == null) || datasourceID.isEmpty() )
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throw new RuntimeException("One of the bulk-imported datasourceIDs was not found! | source: " + source);
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excludedIDs.add(datasourceID);
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}
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int exclusionListSize = excludedIDs.size(); // This list will not be empty.
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// Prepare the "excludedDatasourceIDsStringList" to be used inside the "findAssignmentsQuery". Create the following string-pattern:
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// ("ID_1", "ID_2", ...)
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final StringBuilder sb = new StringBuilder((exclusionListSize * 46) + (exclusionListSize -1) +2 );
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sb.append("(");
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for ( int i=0; i < exclusionListSize; ++i ) {
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sb.append("\"").append(excludedIDs.get(i)).append("\"");
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if ( i < (exclusionListSize -1) )
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sb.append(", ");
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}
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sb.append(")");
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excludedDatasourceIDsStringList = sb.toString();
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logger.info("The following bulkImport-datasources will be excluded from crawling: " + excludedDatasourceIDsStringList);
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}
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public ResponseEntity<?> getAssignments(String workerId, int assignmentsLimit)
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{
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// Create the Assignments from the id-urls stored in the database up to the < assignmentsLimit >.
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String findAssignmentsQuery =
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"select pubid, url, datasourceid, datasourcename\n" + // The datsourceName is currently not used. It may be used by the Worker, in the future to apply a datasource-specific aggregation plugin to take the full-texts quickly, instead of using the general crawling one.
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"from (select distinct pubid, url, datasourceid, datasourcename, attempt_count, pub_year\n" +
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" from (select p.id as pubid, p.year as pub_year, pu.url as url, d.id as datasourceid, d.name as datasourcename, attempts.counts as attempt_count\n" +
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" from " + ImpalaConnector.databaseName + ".publication p\n" +
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" join " + ImpalaConnector.databaseName + ".publication_urls pu on pu.id=p.id\n" +
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" join " + ImpalaConnector.databaseName + ".datasource d on d.id=p.datasourceid\n" +
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" left outer join (select count(a.id) as counts, a.id from " + ImpalaConnector.databaseName + ".attempt a group by a.id) as attempts\n" +
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" on attempts.id=p.id\n" +
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" left outer join (\n" +
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" select a.id, a.original_url from " + ImpalaConnector.databaseName + ".assignment a\n" +
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" union all\n" +
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" select pl.id, pl.original_url from " + ImpalaConnector.databaseName + ".payload pl\n" +
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" ) as existing\n" + // Here we access the payload-VIEW which includes the three payload-tables.
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" on existing.id=p.id and existing.original_url=pu.url\n" +
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" where d.allow_harvest=true and existing.id is null\n" +
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((excludedDatasourceIDsStringList != null) ? // If we have an exclusion-list, use it below.
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(" and d.id not in " + excludedDatasourceIDsStringList + "\n") : "") +
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" and coalesce(attempts.counts, 0) <= " + maxAttemptsPerRecordAtomic.get() + "\n" +
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" and not exists (select 1 from " + ImpalaConnector.databaseName + ".attempt a where a.id=p.id and a.error_class = 'noRetry' limit 1)\n" +
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" and pu.url != '' and pu.url is not null\n" + // Some IDs have empty-string urls, there are no "null" urls, but keep the relevant check for future-proofing.
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" limit " + (assignmentsLimit * 10) + ")\n" +
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" as non_distinct_results\n" +
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" order by coalesce(attempt_count, 0), coalesce(pub_year, 0) desc, reverse(pubid), url\n" +
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" limit " + assignmentsLimit + ")\n" +
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"as findAssignmentsQuery";
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// The "order by" in the end makes sure the older attempted records will be re-attempted after a long time.
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//logger.trace("findAssignmentsQuery:\n" + findAssignmentsQuery); // DEBUG!
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final String getAssignmentsQuery = "select * from " + ImpalaConnector.databaseName + ".current_assignment";
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List<Assignment> assignments = new ArrayList<>(assignmentsLimit);
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ImpalaConnector.databaseLock.lock();
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String errorMsg = createAndInitializeCurrentAssignmentsTable(findAssignmentsQuery);
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if ( errorMsg != null ) {
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ImpalaConnector.databaseLock.unlock();
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return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(errorMsg);
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}
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long timestampMillis = System.currentTimeMillis();
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Timestamp timestamp = new Timestamp(timestampMillis); // Store it here, in order to have the same for all current records.
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try {
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jdbcTemplate.query(getAssignmentsQuery, rs -> {
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Assignment assignment = new Assignment();
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assignment.setWorkerId(workerId);
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assignment.setTimestamp(timestamp);
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Datasource datasource = new Datasource();
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try { // For each of the 4 columns returned. The indexing starts from 1
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assignment.setId(rs.getString(1));
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assignment.setOriginalUrl(rs.getString(2));
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datasource.setId(rs.getString(3));
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datasource.setName(rs.getString(4));
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} catch (SQLException sqle) {
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logger.error("No value was able to be retrieved from one of the columns of row_" + rs.getRow(), sqle);
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}
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assignment.setDatasource(datasource);
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assignments.add(assignment);
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});
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} catch (Exception e) {
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errorMsg = ImpalaConnector.handleQueryException("getAssignmentsQuery", getAssignmentsQuery, e);
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String tmpErrMsg = dropCurrentAssignmentTable();
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if ( tmpErrMsg != null )
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errorMsg += "\n" + tmpErrMsg;
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ImpalaConnector.databaseLock.unlock();
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return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(errorMsg);
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}
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int assignmentsSize = assignments.size();
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if ( assignmentsSize == 0 ) {
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errorMsg = "No results retrieved from the \"findAssignmentsQuery\" for worker with id: " + workerId + ". Will increase the \"maxAttempts\" to " + maxAttemptsPerRecordAtomic.incrementAndGet() + " for the next requests.";
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logger.error(errorMsg);
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String tmpErrMsg = dropCurrentAssignmentTable();
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ImpalaConnector.databaseLock.unlock();
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if ( tmpErrMsg != null ) {
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errorMsg += "\n" + tmpErrMsg; // The additional error-msg is already logged.
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return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(errorMsg);
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} else
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return ResponseEntity.status(HttpStatus.MULTI_STATUS).body(new AssignmentsResponse((long) -1, null));
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} else if ( assignmentsSize < assignmentsLimit )
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logger.warn("The retrieved results were fewer (" + assignmentsSize + ") than the \"assignmentsLimit\" (" + assignmentsLimit + "), for worker with id: " + workerId + ". Will increase the \"maxAttempts\" to " + maxAttemptsPerRecordAtomic.incrementAndGet() + " for the next requests.");
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logger.debug("Finished gathering " + assignmentsSize + " assignments for worker with id \"" + workerId + "\". Going to insert them into the \"assignment\" table and then return them to the worker.");
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// Write the Assignment details to the assignment-table.
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String insertAssignmentsQuery = "insert into " + ImpalaConnector.databaseName + ".assignment \n select pub_data.pubid, pub_data.url, '" + workerId + "', " + timestampMillis + "\n"
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+ "from (\n select pubid, url from " + ImpalaConnector.databaseName + ".current_assignment) as pub_data";
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try {
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jdbcTemplate.execute(insertAssignmentsQuery);
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} catch (Exception e) {
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errorMsg = ImpalaConnector.handleQueryException("insertAssignmentsQuery", insertAssignmentsQuery, e);
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String tmpErrMsg = dropCurrentAssignmentTable();
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if ( tmpErrMsg != null )
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errorMsg += "\n" + tmpErrMsg;
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ImpalaConnector.databaseLock.unlock();
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return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(errorMsg);
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}
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errorMsg = dropCurrentAssignmentTable();
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if ( errorMsg != null ) {
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ImpalaConnector.databaseLock.unlock();
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return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(errorMsg);
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}
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logger.debug("Finished inserting " + assignmentsSize + " assignments into the \"assignment\"-table. Going to merge the parquet files for this table.");
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String mergeErrorMsg = fileUtils.mergeParquetFiles("assignment", "", null);
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if ( mergeErrorMsg != null ) {
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ImpalaConnector.databaseLock.unlock();
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return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(mergeErrorMsg);
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}
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ImpalaConnector.databaseLock.unlock();
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long curAssignmentsBatchCounter = assignmentsBatchCounter.incrementAndGet();
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logger.info("Sending batch-assignments_" + curAssignmentsBatchCounter + " with " + assignmentsSize + " assignments to worker with ID: " + workerId + ".");
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return ResponseEntity.status(HttpStatus.OK).body(new AssignmentsResponse(curAssignmentsBatchCounter, assignments));
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}
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public ResponseEntity<?> addWorkerReport(String curWorkerId, long curReportAssignments, List<UrlReport> urlReports, int sizeOfUrlReports, HttpServletRequest request)
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{
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// Before continuing with inserts, take and upload the fullTexts from the Worker. Also, update the file-"location".
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FileUtils.UploadFullTextsResponse uploadFullTextsResponse = fileUtils.getAndUploadFullTexts(urlReports, request, curReportAssignments, curWorkerId);
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if ( uploadFullTextsResponse == FileUtils.UploadFullTextsResponse.databaseError ) {
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return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body("Problem with the Impala-database!");
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}
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else if ( uploadFullTextsResponse == FileUtils.UploadFullTextsResponse.unsuccessful ) {
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logger.error("Failed to get and/or upload the fullTexts for batch-assignments_" + curReportAssignments);
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// The docUrls were still found! Just update ALL the fileLocations, sizes, hashes and mimetypes, to show that the files are not available.
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fileUtils.updateUrlReportsToHaveNoFullTextFiles(urlReports, false);
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// We write only the payloads which are connected with retrieved full-texts, uploaded to S3-Object-Store.
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// We continue with writing the "attempts", as we want to avoid re-checking the failed-urls later.
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// The urls which give full-text (no matter if we could not get it from the worker), are flagged as "couldRetry" anyway, so they will be picked-up to be checked again later.
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} else
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logger.debug("Finished uploading the full-texts from batch-assignments_" + curReportAssignments);
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String localParquetPath = parquetFileUtils.parquetBaseLocalDirectoryPath + "assignments_" + curReportAssignments + File.separator;
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try {
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Files.createDirectories(Paths.get(localParquetPath)); // No-op if it already exists. It does not throw a "alreadyExistsException"
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} catch (Exception e) {
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String errorMsg = "Could not create the parquet-directory: " + localParquetPath;
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logger.error(errorMsg, e);
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return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(errorMsg);
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}
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logger.debug("Going to write the results in the parquet files, then upload them to HDFS, and then load them into the database's tables. For batch-assignments_" + curReportAssignments);
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List<Callable<ParquetReport>> callableTasks = parquetFileUtils.getTasksForCreatingAndUploadingParquetFiles(urlReports, sizeOfUrlReports, curReportAssignments, localParquetPath, uploadFullTextsResponse, curWorkerId);
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boolean hasAttemptParquetFileProblem = false;
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boolean hasPayloadParquetFileProblem = false;
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try { // Invoke all the tasks and wait for them to finish.
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List<Future<ParquetReport>> futures = insertsExecutor.invokeAll(callableTasks);
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SumParquetSuccess sumParquetSuccess = parquetFileUtils.checkParquetFilesSuccess(futures);
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ResponseEntity<?> errorResponseEntity = sumParquetSuccess.getResponseEntity();
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if ( errorResponseEntity != null ) {
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return errorResponseEntity; // The related log is already shown.
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}
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hasAttemptParquetFileProblem = sumParquetSuccess.isAttemptParquetFileProblem();
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hasPayloadParquetFileProblem = sumParquetSuccess.isPayloadParquetFileProblem();
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if ( hasAttemptParquetFileProblem && hasPayloadParquetFileProblem )
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throw new RuntimeException("All of the parquet files failed to be created or uploaded! Will avoid to execute load-requests into the database, for batch-assignments_" + curReportAssignments);
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else {
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if ( hasAttemptParquetFileProblem )
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logger.error("All of the attempt-parquet files failed to be created or uploaded! Will avoid to execute load-requests into the database-table \"attempt\", for batch-assignments_" + curReportAssignments);
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else if ( hasPayloadParquetFileProblem )
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logger.error("The single payload-parquet-file failed to be created or uploaded! Will avoid to execute load-requests into the database-table \"payload_aggregated\", for batch-assignments_" + curReportAssignments);
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else
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logger.debug("Going to execute \"load\"-requests on the database, for the uploaded parquet-files.");
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}
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// Load all the parquet files of each type into its table.
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ImpalaConnector.databaseLock.lock();
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if ( ! hasAttemptParquetFileProblem )
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hasAttemptParquetFileProblem = ! parquetFileUtils.loadParquetDataIntoTable(parquetFileUtils.parquetHDFSDirectoryPathAttempts + curWorkerId + "/", "attempt");
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if ( ! hasPayloadParquetFileProblem )
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hasPayloadParquetFileProblem = ! parquetFileUtils.loadParquetDataIntoTable(parquetFileUtils.parquetHDFSDirectoryPathPayloadsAggregated + curWorkerId + "/", "payload_aggregated");
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ImpalaConnector.databaseLock.unlock();
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if ( hasAttemptParquetFileProblem && hasPayloadParquetFileProblem )
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throw new RuntimeException("The data from the HDFS parquet sub-directories COULD NOT be loaded into the \"attempt\" and the \"payload_aggregated\" tables, for batch-assignments_" + curReportAssignments);
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else if ( hasAttemptParquetFileProblem || hasPayloadParquetFileProblem )
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logger.error("The data from the HDFS parquet sub-directories COULD NOT be loaded into the \"attempt\" or the \"payload_aggregated\" table, for batch-assignments_" + curReportAssignments);
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else
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logger.debug("The data from the HDFS parquet sub-directories was loaded into the \"attempt\" and the \"payload_aggregated\" tables, for batch-assignments_" + curReportAssignments);
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} catch (InterruptedException ie) { // In this case, any unfinished tasks are cancelled.
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logger.warn("The current thread was interrupted when waiting for the worker-threads to finish inserting into the tables: " + ie.getMessage());
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// This is a very rare case. At the moment, we just move on with table-merging.
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} catch (RuntimeException re) {
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String errorMsg = re.getMessage();
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ImpalaConnector.databaseLock.lock();
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String assignmentErrorMsg = deleteWorkerAssignments(curWorkerId);
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ImpalaConnector.databaseLock.unlock();
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if ( assignmentErrorMsg != null )
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errorMsg += "\n" + assignmentErrorMsg;
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logger.error(errorMsg);
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return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(errorMsg);
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} catch (Exception e) {
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String errorMsg = "Unexpected error when inserting into the \"attempt\" and \"payload_aggregated\" tables in parallel! " + e.getMessage();
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logger.error(errorMsg, e);
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return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(errorMsg);
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} finally {
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logger.debug("Deleting parquet directory: " + localParquetPath);
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fileUtils.deleteDirectory(new File(localParquetPath));
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}
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logger.debug("Going to merge the parquet files for the tables which were altered.");
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// When the uploaded parquet files are "loaded" into the tables, they are actually moved into the directory which contains the data of the table.
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String mergeErrorMsg;
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ImpalaConnector.databaseLock.lock();
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if ( ! hasAttemptParquetFileProblem ) {
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mergeErrorMsg = fileUtils.mergeParquetFiles("attempt", "", null);
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if ( mergeErrorMsg != null ) {
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ImpalaConnector.databaseLock.unlock();
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return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(mergeErrorMsg);
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}
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}
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if ( ! hasPayloadParquetFileProblem ) {
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mergeErrorMsg = fileUtils.mergeParquetFiles("payload_aggregated", "", null);
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if ( mergeErrorMsg != null ) {
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ImpalaConnector.databaseLock.unlock();
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return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(mergeErrorMsg);
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}
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}
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mergeErrorMsg = deleteWorkerAssignments(curWorkerId);
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if ( mergeErrorMsg != null ) {
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ImpalaConnector.databaseLock.unlock();
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return ResponseEntity.status(HttpStatus.INTERNAL_SERVER_ERROR).body(mergeErrorMsg);
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}
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ImpalaConnector.databaseLock.unlock();
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logger.debug("Finished merging the database tables.");
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if ( uploadFullTextsResponse == FileUtils.UploadFullTextsResponse.unsuccessful )
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return ResponseEntity.status(HttpStatus.MULTI_STATUS).body("The full-text files failed to be acquired from the worker!");
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else
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return ResponseEntity.status(HttpStatus.OK).build();
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}
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private String createAndInitializeCurrentAssignmentsTable(String findAssignmentsQuery)
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{
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String createCurrentAssignmentsQuery = "create table " + ImpalaConnector.databaseName + ".current_assignment as \n" + findAssignmentsQuery;
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String computeCurrentAssignmentsStatsQuery = "COMPUTE STATS " + ImpalaConnector.databaseName + ".current_assignment";
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try {
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jdbcTemplate.execute(createCurrentAssignmentsQuery);
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} catch (Exception e) {
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String errorMsg = ImpalaConnector.handleQueryException("createCurrentAssignmentsQuery", createCurrentAssignmentsQuery, e);
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String tmpErrMsg = dropCurrentAssignmentTable(); // The table may be partially created, e.g. in case of an "out of memory" error in the database-server, during the creation, resulting in an empty table (yes it has happened).
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if ( tmpErrMsg != null )
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errorMsg += "\n" + tmpErrMsg;
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return errorMsg;
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}
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try {
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jdbcTemplate.execute(computeCurrentAssignmentsStatsQuery);
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} catch (Exception e) {
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String errorMsg = ImpalaConnector.handleQueryException("computeCurrentAssignmentsStatsQuery", computeCurrentAssignmentsStatsQuery, e);
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String tmpErrMsg = dropCurrentAssignmentTable();
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if ( tmpErrMsg != null )
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errorMsg += "\n" + tmpErrMsg;
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return errorMsg;
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}
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return null; // All good.
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}
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private String dropCurrentAssignmentTable() {
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String dropCurrentAssignmentsQuery = "DROP TABLE IF EXISTS " + ImpalaConnector.databaseName + ".current_assignment PURGE";
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try {
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jdbcTemplate.execute(dropCurrentAssignmentsQuery);
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return null; // All good. No error-message.
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} catch (Exception e) {
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return ImpalaConnector.handleQueryException("dropCurrentAssignmentsQuery", dropCurrentAssignmentsQuery, e); // The error is already logged inside.
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}
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}
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private String deleteWorkerAssignments(String curWorkerId)
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{
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// This will delete the rows of the "assignment" table which refer to the "curWorkerId". As we have non-KUDU Impala tables, the Delete operation can only succeed through a "merge" operation of the rest of the data.
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// Only the rows referring to OTHER workerIDs get stored in a temp-table, while the "assignment" table gets deleted. Then, the temp_table becomes the "assignment" table.
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// We don't need to keep the assignment-info anymore, the "findAssignmentsQuery" checks the "payload_aggregated" table for previously handled tasks.
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return fileUtils.mergeParquetFiles("assignment", " WHERE workerid != ", curWorkerId);
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}
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// The "batchExecute" does not work in this Impala-Database, so this is a "giant-query" solution.
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// Note: this causes an "Out of memory"-ERROR in the current version of the Impala JDBC driver. If a later version is provided, then this code should be tested.
|
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private static PreparedStatement constructLargeInsertQuery(Connection con, String baseInsertQuery, int dataSize, int numParamsPerRow) throws RuntimeException {
|
|
StringBuilder sb = new StringBuilder(baseInsertQuery.length() + (dataSize * 6 * numParamsPerRow)); // TODO - Make this a global Thread-Local var. And then "clear" (reset) it after each use.
|
|
sb.append(baseInsertQuery);
|
|
for ( int i=1; i <= dataSize; ++i ) {
|
|
sb.append("(");
|
|
for ( int j=1; j <= numParamsPerRow; ++j ) {
|
|
sb.append("?");
|
|
if ( j < numParamsPerRow )
|
|
sb.append(",");
|
|
}
|
|
sb.append(")");
|
|
if ( i < dataSize )
|
|
sb.append(",");
|
|
}
|
|
|
|
PreparedStatement preparedInsertStatement;
|
|
try { // We use a "PreparedStatement" to do insertions, for security reasons.
|
|
preparedInsertStatement = con.prepareStatement(sb.toString());
|
|
} catch (SQLException sqle) {
|
|
String errorMsg = "Problem when creating the prepared statement for the insertQuery: \"" + baseInsertQuery + "\"...!\n";
|
|
logger.error(errorMsg + sqle.getMessage());
|
|
throw new RuntimeException(errorMsg);
|
|
}
|
|
return preparedInsertStatement;
|
|
}
|
|
|
|
}
|