de.codecentric.batch.configuration.TaskExecutorBatchConfigurer.java Source code

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Here is the source code for de.codecentric.batch.configuration.TaskExecutorBatchConfigurer.java

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/*
 * Copyright 2014 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 de.codecentric.batch.configuration;

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.annotation.BatchConfigurer;
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.boot.autoconfigure.condition.ConditionalOnMissingBean;
import org.springframework.context.annotation.Configuration;
import org.springframework.core.env.Environment;
import org.springframework.core.task.TaskExecutor;
import org.springframework.jdbc.datasource.DataSourceTransactionManager;
import org.springframework.transaction.PlatformTransactionManager;

/**
 * This batch infrastructure configuration is quite similar to the
 * {@link org.springframework.batch.core.configuration.annotation.DefaultBatchConfigurer}, it only
 * references a {@link org.springframework.core.task.TaskExecutor} used in the {@link org.springframework.batch.core.launch.support.SimpleJobLauncher}
 * for starting jobs asynchronously. 
 * 
 * @author Tobias Flohre
 * @author Dennis Schulte
 * 
 */
@ConditionalOnMissingBean(BatchConfigurer.class)
@Configuration
public class TaskExecutorBatchConfigurer implements BatchConfigurer {

    private static final Log logger = LogFactory.getLog(TaskExecutorBatchConfigurer.class);

    @Autowired
    private Environment env;

    // Created by TaskExecutorConfiguration if it is used. If an alternative TaskExecutor is configured, 
    // it will be injected here.
    @Autowired
    private TaskExecutor taskExecutor;

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

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

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

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

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

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

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

    protected JobRepository createJobRepository() throws Exception {
        JobRepositoryFactoryBean factory = new JobRepositoryFactoryBean();
        factory.setDataSource(dataSource);
        factory.setTransactionManager(transactionManager);
        String isolationLevelForCreate = env.getProperty("batch.repository.isolationlevelforcreate");
        if (isolationLevelForCreate != null) {
            factory.setIsolationLevelForCreate(isolationLevelForCreate);
        }
        String tablePrefix = env.getProperty("batch.repository.tableprefix");
        if (tablePrefix != null) {
            factory.setTablePrefix(tablePrefix);
        }
        factory.afterPropertiesSet();
        return factory.getObject();
    }

    @PostConstruct
    public void initialize() throws Exception {
        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);
            String tablePrefix = env.getProperty("batch.repository.tableprefix");
            if (tablePrefix != null) {
                jobExplorerFactoryBean.setTablePrefix(tablePrefix);
            }
            jobExplorerFactoryBean.afterPropertiesSet();
            this.jobExplorer = jobExplorerFactoryBean.getObject();
        }

        this.jobLauncher = createJobLauncher();
    }

}