org.hibernate.search.backend.impl.lucene.works.ByTermUpdateWorkDelegate.java Source code

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Here is the source code for org.hibernate.search.backend.impl.lucene.works.ByTermUpdateWorkDelegate.java

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/*
 * Hibernate Search, full-text search for your domain model
 *
 * License: GNU Lesser General Public License (LGPL), version 2.1 or later
 * See the lgpl.txt file in the root directory or <http://www.gnu.org/licenses/lgpl-2.1.html>.
 */

package org.hibernate.search.backend.impl.lucene.works;

import java.io.Serializable;
import java.util.Map;

import org.apache.lucene.index.IndexWriter;
import org.apache.lucene.index.Term;

import org.hibernate.search.exception.SearchException;
import org.hibernate.search.backend.IndexingMonitor;
import org.hibernate.search.backend.LuceneWork;
import org.hibernate.search.bridge.util.impl.NumericFieldUtils;
import org.hibernate.search.engine.spi.DocumentBuilderIndexedEntity;
import org.hibernate.search.store.Workspace;
import org.hibernate.search.util.impl.ScopedAnalyzer;
import org.hibernate.search.util.logging.impl.Log;
import org.hibernate.search.util.logging.impl.LoggerFactory;

/**
 * This applies the index update operation using the Lucene operation
 * {@link org.apache.lucene.index.IndexWriter#updateDocument}.
 * This is the most efficient way to update the index, but underlying store
 * must guarantee that the term is unique across documents and entity types.
 *
 * @author gustavonalle
 */
public final class ByTermUpdateWorkDelegate extends UpdateWorkDelegate {

    private static final Log log = LoggerFactory.make();

    private final AddWorkDelegate addDelegate;
    private final Workspace workspace;

    ByTermUpdateWorkDelegate(Workspace workspace, AddWorkDelegate addDelegate) {
        super(null, null);
        this.workspace = workspace;
        this.addDelegate = addDelegate;
    }

    @Override
    public void performWork(LuceneWork work, IndexWriter writer, IndexingMonitor monitor) {
        final Serializable id = work.getId();
        final Class<?> managedType = work.getEntityClass();
        DocumentBuilderIndexedEntity builder = workspace.getDocumentBuilder(managedType);
        try {
            if (DeleteWorkDelegate.isIdNumeric(builder)) {
                log.tracef("Deleting %s#%s by query using an IndexWriter#updateDocument as id is Numeric",
                        managedType, id);
                writer.deleteDocuments(NumericFieldUtils.createExactMatchQuery(builder.getIdKeywordName(), id));
                // no need to log the Add operation as we'll log in the delegate
                this.addDelegate.performWork(work, writer, monitor);
            } else {
                log.tracef("Updating %s#%s by id using an IndexWriter#updateDocument.", managedType, id);
                Term idTerm = new Term(builder.getIdKeywordName(), work.getIdInString());
                Map<String, String> fieldToAnalyzerMap = work.getFieldToAnalyzerMap();
                ScopedAnalyzer analyzer = builder.getAnalyzer();
                analyzer = AddWorkDelegate.updateAnalyzerMappings(workspace, analyzer, fieldToAnalyzerMap);
                writer.updateDocument(idTerm, work.getDocument(), analyzer);
            }
            workspace.notifyWorkApplied(work);
        } catch (Exception e) {
            String message = "Unable to update " + managedType + "#" + id + " in index.";
            throw new SearchException(message, e);
        }
        if (monitor != null) {
            monitor.documentsAdded(1l);
        }
    }

}