org.obiba.opal.core.service.OpalGeneralConfigServiceImpl.java Source code

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Here is the source code for org.obiba.opal.core.service.OpalGeneralConfigServiceImpl.java

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/*
 * Copyright (c) 2013 OBiBa. All rights reserved.
 *
 * This program and the accompanying materials
 * are made available under the terms of the GNU Public License v3.0.
 *
 * You should have received a copy of the GNU General Public License
 * along with this program.  If not, see <http://www.gnu.org/licenses/>.
 */
package org.obiba.opal.core.service;

import javax.annotation.Nullable;
import javax.validation.constraints.NotNull;

import org.obiba.opal.core.domain.OpalGeneralConfig;
import org.slf4j.Logger;
import org.slf4j.LoggerFactory;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.stereotype.Component;

import com.google.common.collect.Iterables;
import com.orientechnologies.orient.core.db.document.ODatabaseDocument;
import com.orientechnologies.orient.core.db.document.ODatabaseDocumentTx;
import com.orientechnologies.orient.core.record.impl.ODocument;
import com.orientechnologies.orient.core.tx.OTransaction;

/**
 * Default implementation of System Service
 */
@Component
public class OpalGeneralConfigServiceImpl implements OpalGeneralConfigService {

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

    @Autowired
    private OrientDbService orientDbService;

    @Override
    public void start() {
    }

    @Override
    public void stop() {
    }

    @Override
    public void save(@NotNull final OpalGeneralConfig config) {
        orientDbService.execute(new OrientDbService.WithinDocumentTxCallbackWithoutResult() {
            @Override
            protected void withinDocumentTxWithoutResult(ODatabaseDocumentTx db) {

                ODocument document = getDocument(db);
                if (document == null) {
                    document = new ODocument(OpalGeneralConfig.class.getSimpleName());
                }
                orientDbService.copyToDocument(config, document);

                db.begin(OTransaction.TXTYPE.OPTIMISTIC);
                log.debug("save {}", document);
                document.save();
                db.commit();
            }
        });
    }

    @Override
    @NotNull
    public OpalGeneralConfig getConfig() throws OpalGeneralConfigMissingException {
        return orientDbService.execute(new OrientDbService.WithinDocumentTxCallback<OpalGeneralConfig>() {
            @Override
            public OpalGeneralConfig withinDocumentTx(ODatabaseDocumentTx db) {
                ODocument document = getDocument(db);
                if (document == null) {
                    throw new OpalGeneralConfigMissingException();
                }
                return orientDbService.fromDocument(OpalGeneralConfig.class, document);
            }
        });
    }

    @Nullable
    private ODocument getDocument(ODatabaseDocument db) {
        String className = OpalGeneralConfig.class.getSimpleName();
        if (db.getMetadata().getSchema().getClass(className) == null) {
            return null;
        }
        return Iterables.getOnlyElement(db.browseClass(className), null);
    }

}