/*
    * Copyright 2012-2013 the original author or authors.
    *
    * 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.springframework.batch.core.configuration.annotation;
  
  import java.util.Collection;
  
  import org.springframework.batch.core.configuration.support.ApplicationContextFactory;
  import org.springframework.batch.core.configuration.support.AutomaticJobRegistrar;
  import org.springframework.batch.core.configuration.support.DefaultJobLoader;
  import org.springframework.batch.core.launch.JobLauncher;
  import org.springframework.batch.core.repository.JobRepository;
  import org.springframework.beans.factory.annotation.Autowired;
  import org.springframework.context.ApplicationContext;
  import org.springframework.context.annotation.Bean;
  import org.springframework.context.annotation.Configuration;
  import org.springframework.transaction.PlatformTransactionManager;
  
  /**
   * Base {@code Configuration} class providing common structure for enabling and using Spring Batch. Customization is
   * available by implementing the {@link BatchConfigurer} interface.
   *
   * @author Dave Syer
   * @since 2.2
   * @see EnableBatchProcessing
   */
  @Configuration
  public class ModularBatchConfiguration extends AbstractBatchConfiguration {
  
  	@Autowired
  	private ApplicationContext context;
  
  	@Autowired(required = false)
  	private Collection<BatchConfigurer> configurers;
  
  	private AutomaticJobRegistrar registrar = new AutomaticJobRegistrar();
  
  	@Override
  	@Bean
  	public JobRepository jobRepository() throws Exception {
  		return getConfigurer(configurers).getJobRepository();
  	}
  
  	@Override
  	@Bean
  	public JobLauncher jobLauncher() throws Exception {
  		return getConfigurer(configurers).getJobLauncher();
  	}
  
  	@Override
  	@Bean
  	public PlatformTransactionManager transactionManager() throws Exception {
  		return getConfigurer(configurers).getTransactionManager();
  	}
  
  	@Bean
  	public AutomaticJobRegistrar jobRegistrar() throws Exception {
  		registrar.setJobLoader(new DefaultJobLoader(jobRegistry()));
  		for (ApplicationContextFactory factory : context.getBeansOfType(ApplicationContextFactory.class).values()) {
  			registrar.addApplicationContextFactory(factory);
  		}
  		return registrar;
  	}
  
  }