org.mycore.backend.jpa.MCRJPABootstrapper Maven / Gradle / Ivy
/*
* This file is part of *** M y C o R e ***
* See http://www.mycore.de/ for details.
*
* MyCoRe 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.
*
* MyCoRe 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 MyCoRe. If not, see .
*/
package org.mycore.backend.jpa;
import java.util.List;
import java.util.Map;
import java.util.Optional;
import java.util.Set;
import java.util.stream.Collectors;
import java.util.stream.Stream;
import javax.persistence.EntityManagerFactory;
import javax.persistence.Persistence;
import javax.persistence.PersistenceException;
import javax.persistence.metamodel.EntityType;
import javax.persistence.metamodel.Metamodel;
import javax.servlet.ServletContext;
import org.apache.logging.log4j.LogManager;
import org.mycore.backend.hibernate.MCRHibernateConfigHelper;
import org.mycore.common.MCRException;
import org.mycore.common.config.MCRConfiguration2;
import org.mycore.common.events.MCRShutdownHandler;
import org.mycore.common.events.MCRStartupHandler.AutoExecutable;
/**
* Initializes JPA {@link EntityManagerFactory}
* @author Thomas Scheffler (yagee)
*/
public class MCRJPABootstrapper implements AutoExecutable {
public static final String PERSISTENCE_UNIT_NAME = "MyCoRe";
@Override
public String getName() {
return "JPA Bootstrapper";
}
@Override
public int getPriority() {
return 1000;
}
@Override
public void startUp(ServletContext servletContext) {
try {
initializeJPA();
} catch (PersistenceException e) {
//fix for MCR-1236
if (MCRConfiguration2.getBoolean("MCR.Persistence.Database.Enable").orElse(true)) {
LogManager.getLogger()
.error(() -> "Could not initialize JPA. Database access is disabled in this session.", e);
MCRConfiguration2.set("MCR.Persistence.Database.Enable", String.valueOf(false));
}
MCREntityManagerProvider.init(e);
return;
}
Metamodel metamodel = MCREntityManagerProvider.getEntityManagerFactory().getMetamodel();
checkHibernateMappingConfig(metamodel);
LogManager.getLogger()
.info("Mapping these entities: {}", metamodel.getEntities()
.stream()
.map(EntityType::getJavaType)
.map(Class::getName)
.collect(Collectors.toList()));
MCRShutdownHandler.getInstance().addCloseable(new MCRJPAShutdownProcessor());
}
public static void initializeJPA() {
initializeJPA(null, null);
}
public static void initializeJPA(String persistenceUnitName) {
initializeJPA(persistenceUnitName, null);
}
public static void initializeJPA(String persistenceUnitName, Map properties) {
EntityManagerFactory entityManagerFactory = Persistence.createEntityManagerFactory(
Optional.ofNullable(persistenceUnitName).orElse(PERSISTENCE_UNIT_NAME),
properties);
checkFactory(entityManagerFactory);
MCREntityManagerProvider.init(entityManagerFactory);
}
private static void checkFactory(EntityManagerFactory entityManagerFactory) {
MCRHibernateConfigHelper.checkEntityManagerFactoryConfiguration(entityManagerFactory);
}
private void checkHibernateMappingConfig(Metamodel metamodel) {
Set mappedEntities = metamodel
.getEntities()
.stream()
.map(EntityType::getJavaType)
.map(Class::getName)
.collect(Collectors.toSet());
List unMappedEntities = MCRConfiguration2.getString("MCR.Hibernate.Mappings")
.map(MCRConfiguration2::splitValue)
.orElseGet(Stream::empty)
.filter(cName -> !mappedEntities.contains(cName))
.collect(Collectors.toList());
if (!unMappedEntities.isEmpty()) {
throw new MCRException(
"JPA Mapping is inclomplete. Could not find a mapping for these classes: " + unMappedEntities);
}
}
}