org.nuiton.topia.service.script.TopiaSqlScriptGeneratorServiceContext Maven / Gradle / Ivy

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ObServe ToPIA Script service module
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package org.nuiton.topia.service.script;

/*-
 * #%L
 * ObServe Toolkit :: ToPIA Script 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.hibernate.boot.Metadata;
import org.hibernate.boot.registry.BootstrapServiceRegistry;
import org.hibernate.boot.registry.BootstrapServiceRegistryBuilder;
import org.hibernate.boot.registry.StandardServiceRegistry;
import org.hibernate.boot.registry.StandardServiceRegistryBuilder;
import org.hibernate.boot.spi.MetadataImplementor;
import org.hibernate.dialect.Dialect;
import org.hibernate.engine.config.spi.ConfigurationService;
import org.hibernate.tool.hbm2ddl.SchemaExport;
import org.hibernate.tool.schema.TargetType;
import org.nuiton.topia.persistence.HibernateAvailableSettings;
import org.nuiton.topia.persistence.TopiaApplicationContext;
import org.nuiton.topia.persistence.TopiaPersistenceContext;
import org.nuiton.topia.persistence.internal.AbstractTopiaPersistenceContext;
import org.nuiton.topia.persistence.metadata.TopiaMetadataModel;
import org.nuiton.topia.persistence.script.SqlScriptWriter;
import org.nuiton.topia.persistence.script.TopiaBlobsContainer;

import java.io.Closeable;
import java.io.IOException;
import java.nio.file.Files;
import java.nio.file.Path;
import java.util.EnumSet;
import java.util.LinkedHashSet;
import java.util.Optional;
import java.util.Properties;
import java.util.Set;

/**
 * Created by tchemit on 13/05/2018.
 *
 * @author Tony Chemit - [email protected]
 */
public class TopiaSqlScriptGeneratorServiceContext implements Closeable {

    private final TopiaSqlScriptGeneratorRequest request;
    private final TopiaApplicationContext sourceTopiaApplicationContext;
    private final Set blobsContainerBuilders = new LinkedHashSet<>();
    private TopiaPersistenceContext sourcePersistenceContext;
    private TopiaMetadataModel topiaMetaModel;

    private SqlScriptWriter writer;

    public TopiaSqlScriptGeneratorServiceContext(TopiaSqlScriptGeneratorRequest request, TopiaApplicationContext sourceTopiaApplicationContext) {
        this.request = request;
        this.sourceTopiaApplicationContext = sourceTopiaApplicationContext;
    }

    public TopiaApplicationContext getSourceTopiaApplicationContext() {
        return sourceTopiaApplicationContext;
    }

    public void addSchemaExportScript(Class dialectType, SchemaExport.Action action) throws IOException {

        Path sqlScriptFile = Files.createTempFile("schemaExport_" + action.name() + "_", ".sql");
        try {

            Metadata hibernateMetadata = getSourcePersistenceContext().getHibernateSupport().getHibernateMetadata();

            StandardServiceRegistry serviceRegistry = ((MetadataImplementor) hibernateMetadata).getMetadataBuildingOptions().getServiceRegistry();

            Properties properties = new Properties();
            properties.putAll(serviceRegistry.getService(ConfigurationService.class).getSettings());
            properties.put(HibernateAvailableSettings.DIALECT, dialectType.getName());

            BootstrapServiceRegistry bsr = new BootstrapServiceRegistryBuilder().build();
            StandardServiceRegistryBuilder ssrBuilder = new StandardServiceRegistryBuilder(bsr);
            ssrBuilder.applySettings(properties);
            StandardServiceRegistry registry = ssrBuilder.build();

            try {
                new SchemaExport()
                        .setOutputFile(sqlScriptFile.toFile().getAbsolutePath())
                        .setDelimiter(";")
                        .execute(EnumSet.of(TargetType.SCRIPT), action, hibernateMetadata, registry);
            } finally {
                StandardServiceRegistryBuilder.destroy(registry);
            }

            getWriter().writeScript(sqlScriptFile);
        } finally {
            if (Files.exists(sqlScriptFile)) {
                Files.delete(sqlScriptFile);
            }
        }

    }

    public AbstractTopiaPersistenceContext getSourcePersistenceContext() {
        if (sourcePersistenceContext == null) {
            sourcePersistenceContext = sourceTopiaApplicationContext.newPersistenceContext();
        }
        return (AbstractTopiaPersistenceContext) sourcePersistenceContext;
    }

    @Override
    public void close() throws IOException {
        try {
            if (sourcePersistenceContext != null) {
                sourcePersistenceContext.close();
            }
        } finally {
            if (writer != null) {
                writer.close();
            }
        }
    }

    public SqlScriptWriter getWriter() {
        if (writer == null) {
            SqlScriptWriter.Builder writerBuilder = SqlScriptWriter.builder(request.getPath());
            if (request.isGzip()) {
                writerBuilder.gzip();
            }
            writer = writerBuilder.build();
        }

        return writer;
    }


    public Optional> getBlobsContainersBuilder() {
        if (blobsContainerBuilders.isEmpty()) {
            return Optional.empty();
        }
        return Optional.of(blobsContainerBuilders);
    }

    public void registerBlobsContainer(TopiaBlobsContainer.Builder builder) {
        blobsContainerBuilders.add(builder);
    }

    public int getReadFetchSize() {
        return request.getReadFetchSize();
    }
}