annis.administration.DeleteCorpusDao.java Source code

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Here is the source code for annis.administration.DeleteCorpusDao.java

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/*
 * Copyright 2012 SFB 632.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *      http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */
package annis.administration;

import java.io.File;
import java.util.LinkedList;
import java.util.List;
import org.apache.commons.lang3.StringUtils;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.transaction.annotation.Isolation;
import org.springframework.transaction.annotation.Propagation;
import org.springframework.transaction.annotation.Transactional;

/**
 *
 * @author Thomas Krause <krauseto@hu-berlin.de>
 */
public class DeleteCorpusDao extends AbstractAdminstrationDao {

    private final static Logger log = LoggerFactory.getLogger(AdministrationDao.class);

    /**
     * Deletes a top level corpus, when it is already exists.
     * @param corpusName
     */
    @Transactional(readOnly = false, propagation = Propagation.REQUIRES_NEW, isolation = Isolation.READ_COMMITTED)
    public void checkAndRemoveTopLevelCorpus(String corpusName) {
        if (existConflictingTopLevelCorpus(corpusName)) {
            log.info("delete conflicting corpus: {}", corpusName);
            List<String> corpusNames = new LinkedList<>();
            corpusNames.add(corpusName);
            deleteCorpora(getAnnisDao().mapCorpusNamesToIds(corpusNames), false);
        }
    }

    @Transactional(readOnly = false, propagation = Propagation.REQUIRES_NEW, isolation = Isolation.READ_COMMITTED)
    public void deleteCorpora(List<Long> ids, boolean acquireLock) {
        if (acquireLock && !lockRepositoryMetadataTable(false)) {
            log.error("Another import is currently running");
            return;
        }

        if (ids == null || ids.isEmpty()) {
            return;
        }

        File dataDir = getRealDataDir();

        for (long l : ids) {
            log.info("deleting external data files");

            List<String> filesToDelete = getJdbcTemplate()
                    .queryForList("SELECT filename FROM media_files AS m, corpus AS top, corpus AS child\n"
                            + "WHERE\n" + "  m.corpus_ref = child.id AND\n" + "  top.id = ? AND\n"
                            + "  child.pre >= top.pre AND child.post <= top.post", String.class, l);
            for (String fileName : filesToDelete) {
                File f = new File(dataDir, fileName);
                if (f.exists()) {
                    if (!f.delete()) {
                        log.warn("Could not delete {}", f.getAbsolutePath());
                    }
                }
            }

            log.info("dropping tables");

            log.debug("dropping facts table for corpus " + l);
            getJdbcTemplate().execute("DROP TABLE IF EXISTS facts_" + l);
            getJdbcTemplate().execute("DROP TABLE IF EXISTS facts_edge_" + l);
            getJdbcTemplate().execute("DROP TABLE IF EXISTS facts_node_" + l);
            log.debug("dropping annotation_pool table for corpus " + l);
            getJdbcTemplate().execute("DROP TABLE IF EXISTS annotation_pool_" + l);
            log.debug("dropping annotations table for corpus " + l);
            getJdbcTemplate().execute("DROP TABLE IF EXISTS annotations_" + l);
        }

        log.info("recursivly deleting corpora: " + ids);

        executeSqlFromScript("delete_corpus.sql", makeArgs().addValue(":ids", StringUtils.join(ids, ", ")));
    }

}