org.springframework.batch.core.configuration.annotation.DefaultBatchConfigurer.java Source code

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Here is the source code for org.springframework.batch.core.configuration.annotation.DefaultBatchConfigurer.java

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/*
 * Copyright 2012-2018 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
 *
 *      https://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 javax.annotation.PostConstruct;
import javax.sql.DataSource;

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;

@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;

    /**
     * Sets the dataSource.  If the {@link DataSource} has been set once, all future
     * values are passed are ignored (to prevent {@code}@Autowired{@code} from overwriting
     * the value).
     *
     * @param dataSource The data source to use
     */
    @Autowired(required = false)
    public void setDataSource(DataSource dataSource) {
        if (this.dataSource == null) {
            this.dataSource = dataSource;
        }

        if (getTransactionManager() == null) {
            logger.warn("No transaction manager was provided, using a DataSourceTransactionManager");
            this.transactionManager = new DataSourceTransactionManager(this.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 (getTransactionManager() == null) {
                    logger.warn("No transaction manager was provided, using a ResourcelessTransactionManager");
                    this.transactionManager = new ResourcelessTransactionManager();
                }

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

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

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

    protected 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(getTransactionManager());
        factory.afterPropertiesSet();
        return factory.getObject();
    }

    protected JobExplorer createJobExplorer() throws Exception {
        JobExplorerFactoryBean jobExplorerFactoryBean = new JobExplorerFactoryBean();
        jobExplorerFactoryBean.setDataSource(this.dataSource);
        jobExplorerFactoryBean.afterPropertiesSet();
        return jobExplorerFactoryBean.getObject();
    }
}