spring-batch DefaultBatchConfigurer 源码

spring-batch DefaultBatchConfigurer 代码

文件路径：/spring-batch-core/src/main/java/org/springframework/batch/core/configuration/annotation/DefaultBatchConfigurer.java

/*
 * Copyright 2012-2022 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 jakarta.annotation.PostConstruct;
import javax.sql.DataSource;

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.launch.JobLauncher;
import org.springframework.batch.core.launch.support.TaskExecutorJobLauncher;
import org.springframework.batch.core.repository.JobRepository;
import org.springframework.batch.core.repository.support.JobRepositoryFactoryBean;
import org.springframework.beans.factory.InitializingBean;
import org.springframework.jdbc.support.JdbcTransactionManager;
import org.springframework.stereotype.Component;
import org.springframework.transaction.PlatformTransactionManager;
import org.springframework.util.Assert;

/**
 * Default implementation of the {@link BatchConfigurer}.
 */
@Component
public class DefaultBatchConfigurer implements BatchConfigurer, InitializingBean {

	private DataSource dataSource;

	private PlatformTransactionManager transactionManager;

	private JobRepository jobRepository;

	private JobLauncher jobLauncher;

	private JobExplorer jobExplorer;

	/**
	 * Create a new {@link DefaultBatchConfigurer} with the passed datasource. This
	 * constructor configures a default {@link JdbcTransactionManager}.
	 * @param dataSource to use for the job repository and job explorer
	 */
	public DefaultBatchConfigurer(DataSource dataSource) {
		this(dataSource, new JdbcTransactionManager(dataSource));
	}

	/**
	 * Create a new {@link DefaultBatchConfigurer} with the given datasource and
	 * transaction manager.
	 * @param dataSource The data source to use for the job repository and job explorer.
	 * @param transactionManager The transaction manager to use for the job repository.
	 */
	public DefaultBatchConfigurer(DataSource dataSource, PlatformTransactionManager transactionManager) {
		Assert.notNull(dataSource, "DataSource must not be null");
		Assert.notNull(transactionManager, "transactionManager must not be null");
		this.dataSource = dataSource;
		this.transactionManager = transactionManager;
		initialize();
	}

	/**
	 * Sets the dataSource.
	 * @param dataSource The data source to use. Must not be {@code null}.
	 */
	public void setDataSource(DataSource dataSource) {
		Assert.notNull(dataSource, "DataSource must not be null");
		this.dataSource = dataSource;
	}

	/**
	 * @return The {@link DataSource} used by the {@link DefaultBatchConfigurer}.
	 */
	public DataSource getDataSource() {
		return this.dataSource;
	}

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

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

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

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

	@Override
	public void afterPropertiesSet() throws Exception {
		initialize();
	}

	/**
	 * Initialize the {@link DefaultBatchConfigurer} with the {@link JobRepository},
	 * {@link JobExplorer}, and {@link JobLauncher}.
	 */
	@PostConstruct
	public void initialize() {
		try {
			this.jobRepository = createJobRepository();
			this.jobExplorer = createJobExplorer();
			this.jobLauncher = createJobLauncher();
		}
		catch (Exception e) {
			throw new BatchConfigurationException(e);
		}
	}

	/**
	 * @return An instance of {@link JobLauncher}.
	 * @throws Exception The {@link Exception} that is thrown if an error occurs while
	 * creating the {@link JobLauncher}.
	 */
	protected JobLauncher createJobLauncher() throws Exception {
		TaskExecutorJobLauncher jobLauncher = new TaskExecutorJobLauncher();
		jobLauncher.setJobRepository(this.jobRepository);
		jobLauncher.afterPropertiesSet();
		return jobLauncher;
	}

	/**
	 * @return An instance of {@link JobRepository}.
	 * @throws Exception The {@link Exception} that is thrown if an error occurs while
	 * creating the {@link JobRepository}.
	 */
	protected JobRepository createJobRepository() throws Exception {
		JobRepositoryFactoryBean factory = new JobRepositoryFactoryBean();
		factory.setDataSource(getDataSource());
		factory.setTransactionManager(getTransactionManager());
		factory.afterPropertiesSet();
		return factory.getObject();
	}

	/**
	 * @return An instance of {@link JobExplorer}.
	 * @throws Exception The {@link Exception} that is thrown if an error occurs while
	 * creating the {@link JobExplorer}.
	 */
	protected JobExplorer createJobExplorer() throws Exception {
		JobExplorerFactoryBean jobExplorerFactoryBean = new JobExplorerFactoryBean();
		jobExplorerFactoryBean.setDataSource(getDataSource());
		jobExplorerFactoryBean.afterPropertiesSet();
		return jobExplorerFactoryBean.getObject();
	}

}

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