Package org.springframework.batch.core.configuration.annotation

Source Code of org.springframework.batch.core.configuration.annotation.DefaultBatchConfigurer

/*
* 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 org.apache.commons.logging.Log;
import org.apache.commons.logging.LogFactory;
import org.springframework.batch.core.configuration.BatchConfigurationException;
import org.springframework.batch.core.explore.JobExplorer;
import org.springframework.batch.core.explore.support.JobExplorerFactoryBean;
import org.springframework.batch.core.explore.support.MapJobExplorerFactoryBean;
import org.springframework.batch.core.launch.JobLauncher;
import org.springframework.batch.core.launch.support.SimpleJobLauncher;
import org.springframework.batch.core.repository.JobRepository;
import org.springframework.batch.core.repository.support.JobRepositoryFactoryBean;
import org.springframework.batch.core.repository.support.MapJobRepositoryFactoryBean;
import org.springframework.batch.support.transaction.ResourcelessTransactionManager;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.stereotype.Component;
import org.springframework.transaction.PlatformTransactionManager;

import javax.annotation.PostConstruct;
import javax.sql.DataSource;

@Component
public class DefaultBatchConfigurer implements BatchConfigurer {
  private static final Log logger = LogFactory.getLog(DefaultBatchConfigurer.class);

  private DataSource dataSource;
  private PlatformTransactionManager transactionManager;
  private JobRepository jobRepository;
  private JobLauncher jobLauncher;
  private JobExplorer jobExplorer;

  @Autowired(required = false)
  public void setDataSource(DataSource dataSource) {
    this.dataSource = dataSource;
    this.transactionManager = new DataSourceTransactionManager(dataSource);
  }

  protected DefaultBatchConfigurer() {}

  public DefaultBatchConfigurer(DataSource dataSource) {
    setDataSource(dataSource);
  }

  @Override
  public JobRepository getJobRepository() {
    return jobRepository;
  }

  @Override
  public PlatformTransactionManager getTransactionManager() {
    return transactionManager;
  }

  @Override
  public JobLauncher getJobLauncher() {
    return jobLauncher;
  }

  @Override
  public JobExplorer getJobExplorer() {
    return jobExplorer;
  }

  @PostConstruct
  public void initialize() {
    try {
      if(dataSource == null) {
        logger.warn("No datasource was provided...using a Map based JobRepository");

        if(this.transactionManager == null) {
          this.transactionManager = new ResourcelessTransactionManager();
        }

        MapJobRepositoryFactoryBean jobRepositoryFactory = new MapJobRepositoryFactoryBean(this.transactionManager);
        jobRepositoryFactory.afterPropertiesSet();
        this.jobRepository = jobRepositoryFactory.getObject();

        MapJobExplorerFactoryBean jobExplorerFactory = new MapJobExplorerFactoryBean(jobRepositoryFactory);
        jobExplorerFactory.afterPropertiesSet();
        this.jobExplorer = jobExplorerFactory.getObject();
      } else {
        this.jobRepository = createJobRepository();

        JobExplorerFactoryBean jobExplorerFactoryBean = new JobExplorerFactoryBean();
        jobExplorerFactoryBean.setDataSource(this.dataSource);
        jobExplorerFactoryBean.afterPropertiesSet();
        this.jobExplorer = jobExplorerFactoryBean.getObject();
      }

      this.jobLauncher = createJobLauncher();
    } catch (Exception e) {
      throw new BatchConfigurationException(e);
    }
  }

  private JobLauncher createJobLauncher() throws Exception {
    SimpleJobLauncher jobLauncher = new SimpleJobLauncher();
    jobLauncher.setJobRepository(jobRepository);
    jobLauncher.afterPropertiesSet();
    return jobLauncher;
  }

  protected JobRepository createJobRepository() throws Exception {
    JobRepositoryFactoryBean factory = new JobRepositoryFactoryBean();
    factory.setDataSource(dataSource);
    factory.setTransactionManager(transactionManager);
    factory.afterPropertiesSet();
    return  factory.getObject();
  }
}
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