com.guicedee.guicedpersistence.injectors.CustomJpaPersistModule Maven / Gradle / Ivy

Go to download

Show more of this group Show more artifacts with this name
Show all versions of guiced-persistence Show documentation

A complete JPA 2.1 implementation for Standalone or EE Implementation. Enables Multiple Persistence units with full JTA Support using BTM. Perfect for Guice implementations, test suites, and Guice enabled Web Applications or EAR Projects. Requires JDK 8

There is a newer version: 62

Show newest version

/*
 * Copyright (C) 2010 Google, Inc.
 *
 * 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 com.guicedee.guicedpersistence.injectors;

import com.google.common.base.Preconditions;
import com.google.inject.Provides;
import com.google.inject.TypeLiteral;
import com.google.inject.persist.PersistService;
import com.google.inject.persist.UnitOfWork;

import javax.persistence.EntityManager;
import javax.persistence.EntityManagerFactory;
import java.lang.annotation.Annotation;
import java.util.Map;

/**
 * JPA provider for guice persist.
 *
 * @author [email protected] (Dhanji R. Prasanna)
 */
public final class CustomJpaPersistModule
		extends CustomPersistModule
{
	/**
	 * Field jpaUnit
	 */
	private final String jpaUnit;

	/**
	 * Field properties
	 */
	private Map properties;

	/**
	 * The annotation to use
	 */
	private Class annotation;

	private CustomJpaLocalTxnInterceptor transactionInterceptor;

	/**
	 * Constructor CustomJpaPersistModule creates a new CustomJpaPersistModule instance.
	 *
	 * @param jpaUnit
	 * 		of type String
	 * @param annotation
	 * 		The given annotation
	 */
	public CustomJpaPersistModule(String jpaUnit, Class annotation)
	{
		this.annotation = annotation;
		Preconditions.checkArgument(null != jpaUnit && jpaUnit.length() > 0, "JPA unit name must be a non-empty string.");
		this.jpaUnit = jpaUnit;
	}

	/**
	 * Method configurePersistence ...
	 */
	@Override
	protected void configurePersistence()
	{
		bindConstant().annotatedWith(CustomJpa.class)
		              .to(jpaUnit);

		bind(new TypeLiteral>() {}).annotatedWith(CustomJpa.class)
		                                                       .toInstance(annotation);

		CustomJpaPersistService persistService = new CustomJpaPersistService();
		persistService.setPersistenceUnitName(jpaUnit);
		persistService.setAnnotation(annotation);
		persistService.setPersistenceProperties(properties);

		bind(CustomJpaPersistService.class).toInstance(persistService);

		bind(PersistService.class).to(CustomJpaPersistService.class);
		bind(UnitOfWork.class).to(CustomJpaPersistService.class);
		bind(EntityManager.class).toProvider(CustomJpaPersistService.class);

		CustomJpaPersistService.EntityManagerFactoryProvider provider = new CustomJpaPersistService.EntityManagerFactoryProvider();
		provider.setEmProvider(persistService);

		bind(EntityManagerFactory.class).toProvider(provider);

		transactionInterceptor = new CustomJpaLocalTxnInterceptor();
		requestInjection(transactionInterceptor);
	}

	/**
	 * Method provideProperties ...
	 *
	 * @return Map
	 */
	@Provides
	@CustomJpa
	Map provideProperties()
	{
		return properties;
	}

	/**
	 * Configures the JPA persistence provider with a set of properties.
	 *
	 * @param properties
	 * 		A set of name value pairs that configure a JPA persistence provider as per
	 * 		the specification.
	 *
	 * @since 4.0 (since 3.0 with a parameter type of {@code java.util.Properties})
	 */
	public CustomJpaPersistModule properties(Map properties)
	{
		this.properties = properties;
		return this;
	}

}