RejectionServiceDeleteEJB.java

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 * Version: MPL 1.1/GPL 2.0/LGPL 2.1
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 * the License. You may obtain a copy of the License at
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 *
 * Software distributed under the License is distributed on an "AS IS" basis,
 * WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License
 * for the specific language governing rights and limitations under the
 * License.
 *
 * The Original Code is part of dcm4che, an implementation of DICOM(TM) in
 * Java(TM), hosted at https://github.com/gunterze/dcm4che.
 *
 * The Initial Developer of the Original Code is
 * Agfa Healthcare.
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 * the Initial Developer. All Rights Reserved.
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 * See @authors listed below
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package org.dcm4chee.archive.iocm.impl;

import java.sql.Timestamp;
import java.util.ArrayList;
import java.util.Collection;
import java.util.Collections;
import java.util.HashSet;
import java.util.Iterator;

import javax.ejb.EJBException;
import javax.ejb.Stateless;
import javax.persistence.EntityManager;
import javax.persistence.PersistenceContext;
import javax.persistence.TypedQuery;

import org.dcm4chee.archive.entity.Code;
import org.dcm4chee.archive.entity.Location;
import org.dcm4chee.archive.entity.Instance;
import org.dcm4chee.archive.entity.Series;
import org.dcm4chee.archive.entity.SeriesQueryAttributes;
import org.dcm4chee.archive.entity.Study;
import org.dcm4chee.archive.entity.StudyQueryAttributes;
import org.dcm4chee.archive.iocm.RejectionServiceDeleteBean;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;

/**
 * @author Hesham Elbadawi <bsdreko@gmail.com>
 */

@Stateless
public class RejectionServiceDeleteEJB implements RejectionServiceDeleteBean {
    static Logger LOG = LoggerFactory.getLogger(RejectionServiceDeleteEJB.class);

    @PersistenceContext(name = "dcm4chee-arc", unitName = "dcm4chee-arc")
    public EntityManager em;
    
    @Override
    public Collection<Location> deleteRejected(Object source, Collection<Instance> instances) {
        try {
            Collection<Location> toBeDeleted = new HashSet<Location>();
            Study study = null;
            Series series = null;
            for (Instance inst : instances) {
                inst = em.find(Instance.class, inst.getPk());
                if (isRejected(inst)) {
                    if(series != inst.getSeries()) {
                        series = inst.getSeries();
                        em.createNamedQuery(SeriesQueryAttributes.CLEAN_FOR_SERIES).setParameter(1, series.getPk()).executeUpdate();
                    }
                    if(study != inst.getSeries().getStudy()) {
                        study = inst.getSeries().getStudy();
                        em.createNamedQuery(StudyQueryAttributes.CLEAN_FOR_STUDY).setParameter(1, study.getPk()).executeUpdate();
                    }
                    toBeDeleted.addAll(detachReferences(inst));
                    em.remove(inst);
                    LOG.info("Removing {} and Scheduling delete for associated file references", inst);
                }
            }

            return toBeDeleted;
        } catch (Exception e) {
            LOG.error("{}: Error deleting rejected objects, Transaction rolled back", e);
            throw new EJBException(e.getMessage(), e);
        }
    }

    private boolean isRejected(Instance inst) {
        return inst.getRejectionNoteCode()!=null;
    }

    private Collection<Location> detachReferences(Instance inst) {
        Collection<Location> locations = inst.getLocations();
        ArrayList<Location> toDelete = new ArrayList<>(locations.size());
        for(Iterator<Location> iterator = locations.iterator(); iterator.hasNext();) {
            Location ref = iterator.next();
            iterator.remove();
            ref.getInstances().remove(inst);
            //references only this instance
            if(ref.getInstances().size() == 0) {
                toDelete.add(ref);
            }
            em.flush();
        }
        return toDelete;
    }

    @Override
    public Collection<Instance> findRejectedObjects(Code rejectionNote, Timestamp deadline, int maxDeletes) {
        String queryStr = "SELECT i FROM Instance i WHERE i.rejectionNoteCode = ?1 and i.updatedTime < :deadline";
        try{
            TypedQuery<Instance> query = em.createQuery(queryStr, Instance.class);
            if(maxDeletes > 0)
                query.setMaxResults(maxDeletes);

            query.setParameter(1, rejectionNote);
            query.setParameter("deadline", deadline);
            return query.getResultList();
        }
        catch(Exception e)
        {
            LOG.error("{}: Error - finding rejected objects",e);
            return Collections.emptyList();
        }
    }
}