org.eclipse.persistence.jpa.config.RuntimeFactory Maven / Gradle / Ivy

Go to download
Show more of this group Show more artifacts with this name
Show all versions of eclipselink Show documentation
EclipseLink build based upon Git transaction f2b9fc5
The newest version!
/*
 * Copyright (c) 2013, 2024 Oracle and/or its affiliates. All rights reserved.
 * Copyright (c) 2021 IBM Corporation. All rights reserved.
 *
 * This program and the accompanying materials are made available under the
 * terms of the Eclipse Public License v. 2.0 which is available at
 * http://www.eclipse.org/legal/epl-2.0,
 * or the Eclipse Distribution License v. 1.0 which is available at
 * http://www.eclipse.org/org/documents/edl-v10.php.
 *
 * SPDX-License-Identifier: EPL-2.0 OR BSD-3-Clause
 */

// Contributors:
//     Guy Pelletier - initial API and implementation
package org.eclipse.persistence.jpa.config;

import java.util.HashMap;
import java.util.Map;

import jakarta.persistence.EntityManagerFactory;

import org.eclipse.persistence.config.PersistenceUnitProperties;
import org.eclipse.persistence.exceptions.PersistenceUnitLoadingException;
import org.eclipse.persistence.internal.jpa.EntityManagerFactoryImpl;
import org.eclipse.persistence.internal.jpa.EntityManagerFactoryProvider;
import org.eclipse.persistence.internal.jpa.EntityManagerSetupImpl;
import org.eclipse.persistence.internal.jpa.config.persistenceunit.MetadataSource;
import org.eclipse.persistence.internal.jpa.deployment.JPAInitializer;
import org.eclipse.persistence.internal.jpa.deployment.SEPersistenceUnitInfo;
import org.eclipse.persistence.jpa.PersistenceProvider;
// TODO: JPA RS
//import org.eclipse.persistence.jpa.rs.PersistenceContextFactory;
//import org.eclipse.persistence.jpa.rs.PersistenceContextFactoryProvider;
//import org.eclipse.persistence.jpa.rs.PersistenceFactoryBase;
import org.eclipse.persistence.sessions.factories.SessionManager;

/**
 * JPA scripting API implementation.
 *
 * @author Guy Pelletier
 * @since EclipseLink 2.5.1
 */
public class RuntimeFactory {
    private RuntimeFactory() {
    }

    public EntityManagerFactory createEntityManagerFactory(PersistenceUnit pu) {
        EntityManagerSetupImpl emSetupImpl = null;
        boolean isNew = false;
        // the name that uniquely defines persistence unit
        String name = pu.getName();

        pu.setProperty(PersistenceUnitProperties.METADATA_SOURCE, new MetadataSource(pu));
        SEPersistenceUnitInfo puInfo = (SEPersistenceUnitInfo) pu.getPersistenceUnitInfo();

        JPAInitializer initializer = new PersistenceProvider().getInitializer(name, null);
        Map props = new HashMap<>();

        String uniqueName = initializer.createUniquePersistenceUnitName(puInfo);
        String sessionName = EntityManagerSetupImpl.getOrBuildSessionName(props, puInfo, uniqueName);

        try {
            synchronized (EntityManagerFactoryProvider.emSetupImpls) {
                emSetupImpl = EntityManagerFactoryProvider.getEntityManagerSetupImpl(sessionName);

                if (emSetupImpl != null) {
                    if (puInfo.getClassLoader() != emSetupImpl.getPersistenceUnitInfo().getClassLoader()) {
                        emSetupImpl.undeploy();
                        EntityManagerFactoryProvider.emSetupImpls.remove(sessionName);

                        SessionManager manager = SessionManager.getManager();
                        if (manager.getSessions().containsKey(sessionName)) {
                            manager.destroySession(sessionName);
                        }

                        manager.destroy();
                        emSetupImpl = null;
                    }
                }

                if (emSetupImpl == null) {
                    // there may be initial emSetupImpl cached in Initializer - remove it and use.
                    emSetupImpl = initializer.extractInitialEmSetupImpl(name);

                    if (emSetupImpl == null) {
                        // create and predeploy a new emSetupImpl
                        emSetupImpl = initializer.callPredeploy(puInfo, props, uniqueName, sessionName);
                    } else {
                        // change the name
                        emSetupImpl.changeSessionName(sessionName);
                    }

                    // emSetupImpl has been already predeployed, predeploy will just increment factoryCount.
                    emSetupImpl.predeploy(emSetupImpl.getPersistenceUnitInfo(), props);
                    EntityManagerFactoryProvider.addEntityManagerSetupImpl(sessionName, emSetupImpl);
                    isNew = true;
                }
            }

        } catch (Exception e) {
            throw PersistenceUnitLoadingException.exceptionSearchingForPersistenceResources(initializer.getInitializationClassLoader(), e);
        }

        if (!isNew) {
            if (!uniqueName.equals(emSetupImpl.getPersistenceUnitUniqueName())) {
                throw PersistenceUnitLoadingException.sessionNameAlreadyInUse(sessionName, uniqueName, emSetupImpl.getPersistenceUnitUniqueName());
            }

            // synchronized to prevent undeploying by other threads.
            boolean undeployed = false;
            synchronized (emSetupImpl) {
                if (emSetupImpl.isUndeployed()) {
                    undeployed = true;
                }

                // emSetupImpl has been already predeployed, predeploy will just increment factoryCount.
                emSetupImpl.predeploy(emSetupImpl.getPersistenceUnitInfo(), props);
            }
            if (undeployed) {
                // after the emSetupImpl has been obtained from emSetupImpls
                // it has been undeployed by factory.close() in another thread -
                // start all over again.
                return createEntityManagerFactory(pu);
            }
        }

        EntityManagerFactoryImpl factory = null;

        try {
            factory = new EntityManagerFactoryImpl(emSetupImpl, props);

            // This code has been added to allow validation to occur without
            // actually calling createEntityManager
            if (emSetupImpl.shouldGetSessionOnCreateFactory(props)) {
                factory.getDatabaseSession();
            }
        } catch (RuntimeException ex) {
            if (factory != null) {
                factory.close();
            } else {
                emSetupImpl.undeploy();
            }

            throw ex;
        }

        return factory;

    }

    public static RuntimeFactory getInstance() {
        return new RuntimeFactory();
    }

}