001/*
002 * (C) Copyright 2019 Nuxeo (http://nuxeo.com/) and others.
003 *
004 * Licensed under the Apache License, Version 2.0 (the "License");
005 * you may not use this file except in compliance with the License.
006 * You may obtain a copy of the License at
007 *
008 *     http://www.apache.org/licenses/LICENSE-2.0
009 *
010 * Unless required by applicable law or agreed to in writing, software
011 * distributed under the License is distributed on an "AS IS" BASIS,
012 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
013 * See the License for the specific language governing permissions and
014 * limitations under the License.
015 *
016 * Contributors:
017 *     Funsho David
018 */
019
020package org.nuxeo.ecm.core.action;
021
022import static org.nuxeo.ecm.core.bulk.BulkServiceImpl.STATUS_STREAM;
023import static org.nuxeo.lib.stream.computation.AbstractComputation.INPUT_1;
024import static org.nuxeo.lib.stream.computation.AbstractComputation.OUTPUT_1;
025
026import java.io.Serializable;
027import java.util.Arrays;
028import java.util.List;
029import java.util.Map;
030
031import org.apache.logging.log4j.LogManager;
032import org.apache.logging.log4j.Logger;
033import org.nuxeo.ecm.core.api.AbstractSession;
034import org.nuxeo.ecm.core.api.CoreSession;
035import org.nuxeo.ecm.core.api.DocumentExistsException;
036import org.nuxeo.ecm.core.api.DocumentNotFoundException;
037import org.nuxeo.ecm.core.bulk.action.computation.AbstractBulkComputation;
038import org.nuxeo.ecm.core.model.Document;
039import org.nuxeo.ecm.core.model.Session;
040import org.nuxeo.lib.stream.computation.Topology;
041import org.nuxeo.runtime.stream.StreamProcessorTopology;
042
043/**
044 * Bulk Action to delete documents directly at storage level. This might cause inconsistencies if using SQL-based
045 * storages because of parent-children constraints.
046 *
047 * @since 11.1
048 */
049public class DeletionAction implements StreamProcessorTopology {
050
051    private static final Logger log = LogManager.getLogger(DeletionAction.class);
052
053    public static final String ACTION_NAME = "deletion";
054
055    public static final String ACTION_FULL_NAME = "bulk/" + ACTION_NAME;
056
057    @Override
058    public Topology getTopology(Map<String, String> options) {
059        return Topology.builder()
060                       .addComputation(DeletionComputation::new,
061                               Arrays.asList(INPUT_1 + ":" + ACTION_FULL_NAME, OUTPUT_1 + ":" + STATUS_STREAM))
062                       .build();
063    }
064
065    public static class DeletionComputation extends AbstractBulkComputation {
066
067        public DeletionComputation() {
068            super(ACTION_FULL_NAME);
069        }
070
071        @Override
072        protected void compute(CoreSession session, List<String> ids, Map<String, Serializable> properties) {
073            Session internalSession = ((AbstractSession) session).getSession();
074            for (String id : ids) {
075                try {
076                    Document doc = internalSession.getDocumentByUUID(id);
077                    doc.removeSingleton();
078                } catch (DocumentNotFoundException e) {
079                    // Document is already deleted
080                } catch (DocumentExistsException e) {
081                    log.debug("Cannot delete {}: {}", id, e.getMessage());
082                }
083            }
084        }
085    }
086}