org.nuiton.topia.service.migration.TopiaMigrationServiceConfiguration Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of topia-extension-migration Show documentation
ObServe ToPIA Migration service module
The newest version!
package org.nuiton.topia.service.migration;

/*-
 * #%L
 * ObServe Toolkit :: ToPIA Migration service
 * %%
 * Copyright (C) 2017 - 2018 IRD, Ultreia.io
 * %%
 * This program is free software: you can redistribute it and/or modify
 * it under the terms of the GNU General Public License as
 * published by the Free Software Foundation, either version 3 of the
 * License, or (at your option) any later version.
 * 
 * This program is distributed in the hope that it will be useful,
 * but WITHOUT ANY WARRANTY; without even the implied warranty of
 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
 * GNU General Public License for more details.
 * 
 * You should have received a copy of the GNU General Public
 * License along with this program.  If not, see
 * .
 * #L%
 */

import org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.hibernate.dialect.H2Dialect;
import org.nuiton.topia.persistence.TopiaApplicationContext;
import org.nuiton.topia.persistence.TopiaMisconfigurationException;
import org.nuiton.topia.persistence.internal.HibernateProvider;
import org.nuiton.topia.persistence.internal.support.H2TopiaSqlDllSupportImpl;
import org.nuiton.topia.persistence.internal.support.PGTopiaSqlDllSupportImpl;
import org.nuiton.version.Version;
import org.nuiton.version.Versions;

import java.util.Iterator;
import java.util.ServiceLoader;

/**
 * Configuration of the {@link TopiaMigrationService} service.
 * 
 * Created by tchemit on 05/05/2018.
 *
 * @author Tony Chemit - [email protected]
 */
public class TopiaMigrationServiceConfiguration {

    private static final Log log = LogFactory.getLog(TopiaMigrationServiceConfiguration.class);

    /**
     * User callback.
     */
    protected final TopiaMigrationServiceAskUserToMigrate callback;
    /**
     * Topia application context
     */
    protected final TopiaApplicationContext applicationContext;
    /**
     * Persistence model version (the version to migrate to).
     */
    protected final Version modelVersion;
    /**
     * Migration classifier.
     */
    protected final String classifier;

    protected TopiaMigrationServiceConfiguration(TopiaApplicationContext applicationContext, TopiaMigrationServiceAskUserToMigrate callback, String classifier) {
        this.applicationContext = applicationContext;
        this.callback = callback;
        this.modelVersion = Versions.valueOf(applicationContext.getModelVersion());
        this.classifier = classifier;
    }

    public static TopiaMigrationServiceConfiguration of(TopiaApplicationContext applicationContext) {

        String hibernateDialect = HibernateProvider.getHibernateDialect(applicationContext.getConfiguration());
        String classifier = null;
        if (H2Dialect.class.getName().equals(hibernateDialect)) {
            classifier = H2TopiaSqlDllSupportImpl.CLASSIFIER;
        } else if (hibernateDialect.contains("PostgreSQL")) {
            classifier = PGTopiaSqlDllSupportImpl.CLASSIFIER;
        }
        if (classifier != null) {
            log.debug("Use Classifier          - " + classifier);
        }

        TopiaMigrationServiceAskUserToMigrate askUserToMigrate = null;
        Iterator serviceIterator = ServiceLoader.load(TopiaMigrationServiceAskUserToMigrate.class).iterator();
        if (serviceIterator.hasNext()) {

            askUserToMigrate = serviceIterator.next();
            if (serviceIterator.hasNext()) {
                throw new TopiaMisconfigurationException("More than one service registred for type: " + TopiaMigrationServiceAskUserToMigrate.class.getName(), applicationContext.getConfiguration());
            }
        }
        if (askUserToMigrate != null) {
            log.debug("Use callback            - " + askUserToMigrate);
        }
        return new TopiaMigrationServiceConfiguration(applicationContext, askUserToMigrate, classifier);
    }

    public TopiaMigrationServiceAskUserToMigrate getCallback() {
        return callback;
    }

    public TopiaApplicationContext getApplicationContext() {
        return applicationContext;
    }

    public Version getModelVersion() {
        return modelVersion;
    }

    public String getClassifier() {
        return classifier;
    }
}