/* 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 org.activiti.spring.boot;

import java.io.IOException;

import javax.persistence.EntityManagerFactory;
import javax.sql.DataSource;

import org.activiti.spring.SpringAsyncExecutor;
import org.activiti.spring.SpringProcessEngineConfiguration;
import org.springframework.boot.autoconfigure.AutoConfigureAfter;
import org.springframework.boot.autoconfigure.AutoConfigureBefore;
import org.springframework.boot.autoconfigure.condition.ConditionalOnClass;
import org.springframework.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.boot.autoconfigure.jdbc.DataSourceAutoConfiguration;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.orm.jpa.JpaTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;

/**
 * @author Joram Barrez
 * @author Josh Long
 */
@Configuration
@AutoConfigureBefore(DataSourceProcessEngineAutoConfiguration.class)
@AutoConfigureAfter(DataSourceAutoConfiguration.class)
public class JpaProcessEngineAutoConfiguration {

  @Configuration
  @ConditionalOnClass(name= "javax.persistence.EntityManagerFactory")
  @EnableConfigurationProperties(ActivitiProperties.class)
  public static class JpaConfiguration extends AbstractProcessEngineAutoConfiguration {

    @Bean
    @ConditionalOnMissingBean
    public PlatformTransactionManager transactionManager(EntityManagerFactory emf) {
      return new JpaTransactionManager(emf);
    }

    @Bean
    @ConditionalOnMissingBean
    public SpringProcessEngineConfiguration springProcessEngineConfiguration(
            DataSource dataSource, EntityManagerFactory entityManagerFactory,
            PlatformTransactionManager transactionManager, SpringAsyncExecutor springAsyncExecutor) throws IOException {

      SpringProcessEngineConfiguration config = this.baseSpringProcessEngineConfiguration(dataSource, 
          transactionManager, springAsyncExecutor);
      config.setJpaEntityManagerFactory(entityManagerFactory);
      config.setTransactionManager(transactionManager);
      config.setJpaHandleTransaction(false);
      config.setJpaCloseEntityManager(false);
      return config;
    }
  }

}