ws.ament.hammock.jpa.EntityManagerBean Maven / Gradle / Ivy

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/*
 * Copyright 2016 Hammock and its contributors
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 * http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or
 * implied.
 *
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

package ws.ament.hammock.jpa;

import javax.enterprise.context.Dependent;
import javax.enterprise.context.spi.CreationalContext;
import javax.enterprise.inject.spi.Bean;
import javax.enterprise.inject.spi.CDI;
import javax.enterprise.inject.spi.InjectionPoint;
import javax.persistence.EntityManager;
import java.lang.annotation.Annotation;
import java.lang.reflect.Type;
import java.util.Set;

import static java.util.Collections.emptySet;
import static java.util.Collections.singleton;
import static ws.ament.hammock.jpa.Database.DatabaseLiteral.database;

public class EntityManagerBean implements Bean {
    private final String puName;

    public EntityManagerBean(String puName) {
        this.puName = puName;
    }

    @Override
    public Class getBeanClass() {
        return EntityManager.class;
    }

    @Override
    public Set getInjectionPoints() {
        return emptySet();
    }

    @Override
    public boolean isNullable() {
        return false;
    }

    @Override
    public EntityManager create(CreationalContext creationalContext) {
        EntityManagerProducer entityManagerProducer = CDI.current().select(EntityManagerProducer.class).get();
        return entityManagerProducer.getEntityManagerFactoryByName(puName).createEntityManager();
    }

    @Override
    public void destroy(EntityManager entityManager, CreationalContext creationalContext) {
        if(entityManager.isOpen()) {
            entityManager.close();
        }
    }

    @Override
    public Set getTypes() {
        return singleton(EntityManager.class);
    }

    @Override
    public Set getQualifiers() {
        return singleton(database(puName));
    }

    @Override
    public Class getScope() {
        return Dependent.class;
    }

    @Override
    public String getName() {
        return "EntityManager."+puName;
    }

    @Override
    public Set> getStereotypes() {
        return emptySet();
    }

    @Override
    public boolean isAlternative() {
        return false;
    }
}