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49 changes: 49 additions & 0 deletions
49
dspace-api/src/main/java/org/dspace/content/dao/ItemForMetadataEnhancementUpdateDAO.java
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| Original file line number | Diff line number | Diff line change |
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| /** | ||
| * The contents of this file are subject to the license and copyright | ||
| * detailed in the LICENSE and NOTICE files at the root of the source | ||
| * tree and available online at | ||
| * | ||
| * http://www.dspace.org/license/ | ||
| */ | ||
| package org.dspace.content.dao; | ||
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| import java.sql.SQLException; | ||
| import java.util.UUID; | ||
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| import org.dspace.core.Context; | ||
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| public interface ItemForMetadataEnhancementUpdateDAO { | ||
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| /** | ||
| * Add to the metadata_enhancement_update table queue an entry of each items | ||
| * that is potentially affected by the update of the Item with the specified | ||
| * uuid. The items potentially affected are the one that have the provided uuid | ||
| * as value of a cris.virtualsource.* metadata | ||
| * | ||
| * @param context the DSpace Context object | ||
| * @param uuid the uuid of the updated item | ||
| * @return the number of affected items scheduled for update | ||
| * @throws SQLException if a problem with the database occurs | ||
| */ | ||
| int saveAffectedItemsForUpdate(Context context, UUID uuid); | ||
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| /** | ||
| * Remove from the metadata_enhancement_update table queue the entry if any | ||
| * related to the specified id in older than the current date | ||
| * | ||
| * @param context the DSpace Context object | ||
| * @param itemToRemove the uuid of the processed item | ||
| * @throws SQLException if a problem with the database occurs | ||
| */ | ||
| void removeItemForUpdate(Context context, UUID itemToRemove); | ||
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| /** | ||
| * Extract and remove from the table the first uuid to process from the | ||
| * itemupdate_metadata_enhancement table ordered by date queued asc (older | ||
| * first) | ||
| * | ||
| * @param context | ||
| * @return | ||
| */ | ||
| UUID pollItemToUpdate(Context context); | ||
| } |
152 changes: 152 additions & 0 deletions
152
...pi/src/main/java/org/dspace/content/dao/impl/ItemForMetadataEnhancementUpdateDAOImpl.java
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| Original file line number | Diff line number | Diff line change |
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| /** | ||
| * The contents of this file are subject to the license and copyright | ||
| * detailed in the LICENSE and NOTICE files at the root of the source | ||
| * tree and available online at | ||
| * | ||
| * http://www.dspace.org/license/ | ||
| */ | ||
| package org.dspace.content.dao.impl; | ||
|
|
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| import java.sql.SQLException; | ||
| import java.util.UUID; | ||
|
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| import org.dspace.content.MetadataSchema; | ||
| import org.dspace.content.dao.ItemForMetadataEnhancementUpdateDAO; | ||
| import org.dspace.content.factory.ContentServiceFactory; | ||
| import org.dspace.content.service.MetadataSchemaService; | ||
| import org.dspace.core.Context; | ||
| import org.dspace.core.DBConnection; | ||
| import org.dspace.services.ConfigurationService; | ||
| import org.dspace.utils.DSpace; | ||
| import org.hibernate.Session; | ||
| import org.hibernate.query.NativeQuery; | ||
| import org.springframework.beans.factory.annotation.Autowired; | ||
|
|
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| /** | ||
| * Hibernate implementation of the Database Access Object interface class for | ||
| * the ItemForMetadataEnhancementUpdate object. This class is responsible for | ||
| * all database calls for the ItemForMetadataEnhancementUpdate object and is | ||
| * autowired by spring This class should never be accessed directly. | ||
| */ | ||
| public class ItemForMetadataEnhancementUpdateDAOImpl implements ItemForMetadataEnhancementUpdateDAO { | ||
| @Autowired | ||
| ConfigurationService configurationService; | ||
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| @Override | ||
| public void removeItemForUpdate(Context context, UUID itemToRemove) { | ||
| try { | ||
| Session session = getHibernateSession(); | ||
| String sql = "DELETE FROM itemupdate_metadata_enhancement WHERE uuid = :uuid"; | ||
| NativeQuery<?> query = session.createNativeQuery(sql); | ||
| query.setParameter("uuid", itemToRemove); | ||
| query.executeUpdate(); | ||
| } catch (Exception e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
|
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| } | ||
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| @Override | ||
| public UUID pollItemToUpdate(Context context) { | ||
| try { | ||
| Session session = getHibernateSession(); | ||
| String sql = "SELECT cast(uuid as varchar) FROM itemupdate_metadata_enhancement" | ||
| + " ORDER BY date_queued ASC LIMIT 1"; | ||
| NativeQuery<?> query = session.createNativeQuery(sql); | ||
| Object uuidObj = query.uniqueResult(); | ||
| if (uuidObj != null) { | ||
| UUID uuid; | ||
| if (uuidObj instanceof String) { | ||
| uuid = (UUID) UUID.fromString((String) uuidObj); | ||
| } else { | ||
| throw new RuntimeException("Unexpected result type from the database " + uuidObj); | ||
| } | ||
| removeItemForUpdate(context, uuid); | ||
| return uuid; | ||
| } else { | ||
| return null; | ||
| } | ||
| } catch (Exception e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
|
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| } | ||
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| @Override | ||
| public int saveAffectedItemsForUpdate(Context context, UUID uuid) { | ||
| try { | ||
| Session session = getHibernateSession(); | ||
| MetadataSchemaService schemaService = ContentServiceFactory.getInstance().getMetadataSchemaService(); | ||
| MetadataSchema schema = schemaService.find(context, "cris"); | ||
| String sqlInsertOrUpdate; | ||
| if ("org.h2.Driver".equals(configurationService.getProperty("db.driver"))) { | ||
| // H2 doesn't support the INSERT OR UPDATE statement so let's do in two steps | ||
| // update queued date for records already in the queue | ||
| String sqlUpdate = "UPDATE itemupdate_metadata_enhancement" | ||
| + " SET date_queued = CURRENT_TIMESTAMP" | ||
| + " WHERE uuid IN (" | ||
| + " SELECT dspace_object_id FROM metadatavalue " + " WHERE metadata_field_id IN" | ||
| + " ( SELECT metadata_field_id FROM metadatafieldregistry " | ||
| + " WHERE metadata_schema_id = :schema AND element = 'virtualsource')" | ||
| + " AND SUBSTRING(text_value,1,36) = :uuid)"; | ||
| String sqlInsert = | ||
| "INSERT INTO itemupdate_metadata_enhancement (uuid, date_queued)" | ||
| + " SELECT DISTINCT dspace_object_id, CURRENT_TIMESTAMP FROM metadatavalue " | ||
| + " WHERE metadata_field_id IN" | ||
| + " ( SELECT metadata_field_id FROM metadatafieldregistry " | ||
| + " WHERE metadata_schema_id = :schema AND element = 'virtualsource')" | ||
| + " AND SUBSTRING(text_value,1,36) = :uuid " | ||
| + " AND dspace_object_id NOT IN (" | ||
| + " SELECT uuid" | ||
| + " FROM itemupdate_metadata_enhancement" | ||
| + " )"; | ||
| NativeQuery<?> queryUpdate = session.createNativeQuery(sqlUpdate); | ||
| queryUpdate.setParameter("uuid", uuid.toString()); | ||
| queryUpdate.setParameter("schema", schema.getID()); | ||
| queryUpdate.executeUpdate(); | ||
| NativeQuery<?> queryInsert = session.createNativeQuery(sqlInsert); | ||
| queryInsert.setParameter("uuid", uuid.toString()); | ||
| queryInsert.setParameter("schema", schema.getID()); | ||
| return queryInsert.executeUpdate(); | ||
| } else { | ||
| sqlInsertOrUpdate = "INSERT INTO itemupdate_metadata_enhancement (uuid, date_queued) " | ||
| + " SELECT DISTINCT dspace_object_id, CURRENT_TIMESTAMP FROM metadatavalue " | ||
| + " WHERE metadata_field_id IN" | ||
| + " ( SELECT metadata_field_id FROM metadatafieldregistry " | ||
| + " WHERE metadata_schema_id = :schema AND element = 'virtualsource')" | ||
| + " AND substring(text_value,1,36) = :uuid " | ||
| + " ON CONFLICT (uuid) DO UPDATE" | ||
| + " SET date_queued = EXCLUDED.date_queued"; | ||
| NativeQuery<?> queryInsertOrUpdate = session.createNativeQuery(sqlInsertOrUpdate); | ||
| queryInsertOrUpdate.setParameter("uuid", uuid.toString()); | ||
| queryInsertOrUpdate.setParameter("schema", schema.getID()); | ||
| return queryInsertOrUpdate.executeUpdate(); | ||
| } | ||
| } catch (Exception e) { | ||
| throw new RuntimeException(e); | ||
| } | ||
| } | ||
|
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| /** | ||
| * The Hibernate Session used in the current thread | ||
| * | ||
| * @return the current Session. | ||
| * @throws SQLException | ||
| */ | ||
| private Session getHibernateSession() throws SQLException { | ||
| DBConnection dbConnection = new DSpace().getServiceManager().getServiceByName(null, DBConnection.class); | ||
| return ((Session) dbConnection.getSession()); | ||
| } | ||
|
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| public UUID ConvertByteArrayToUUID(byte[] bytea) { | ||
| long mostSigBits = 0; | ||
| long leastSigBits = 0; | ||
| for (int i = 0; i < 8; i++) { | ||
| mostSigBits = (mostSigBits << 8) | (bytea[i] & 0xff); | ||
| leastSigBits = (leastSigBits << 8) | (bytea[i + 8] & 0xff); | ||
| } | ||
|
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| UUID uuid = new UUID(mostSigBits, leastSigBits); | ||
| return uuid; | ||
| } | ||
| } |
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