Spring Cloud 任务的 SimpleTaskConfiguration 和 Spring Batch 的 SimpleBatchConfiguration 防止 Spring Boot 自动配置 XA 事务

Question

我正在尝试为配置了 Spring Boot 的 Spring Batch/Spring Cloud 任务应用程序配置 XA/分布式事务。

我添加了以下依赖项，希望依赖于spring boot自动配置：

compile("org.springframework.boot:spring-boot-starter-jta-atomikos")

但是，以下两个类会导致配置两个事务管理器：

• org.springframework.cloud.task.configuration.SimpleTaskConfiguration

• org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration

查看以下消息：

2016-07-18 21:46:19.952  INFO 18995 --- [           main] o.s.b.f.s.DefaultListableBeanFactory     : Overriding bean definition for bean 'transactionManager' with a different definition: replacing [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.batch.core.configuration.annotation.SimpleBatchConfiguration; factoryMethodName=transactionManager; initMethodName=null; destroyMethodName=(inferred); defined in class path resource [org/springframework/batch/core/configuration/annotation/SimpleBatchConfiguration.class]] with [Root bean: class [null]; scope=; abstract=false; lazyInit=false; autowireMode=3; dependencyCheck=0; autowireCandidate=true; primary=false; factoryBeanName=org.springframework.cloud.task.configuration.SimpleTaskConfiguration; factoryMethodName=transactionManager; initMethodName=null; destroyMethodName=(inferred); defined in org.springframework.cloud.task.configuration.SimpleTaskConfiguration]

然后因为配置了一个名为 transactionManager 的 PlatformTransactionManager，所以我的 atomikos 自动配置没有被选中：

   AtomikosJtaConfiguration did not match
      - @ConditionalOnClass classes found: org.springframework.transaction.jta.JtaTransactionManager,com.atomikos.icatch.jta.UserTransactionManager (OnClassCondition)
      - @ConditionalOnMissingBean (types: org.springframework.transaction.PlatformTransactionManager; SearchStrategy: all) found the following [transactionManager] (OnBeanCondition)

有人可以帮我防止上述两个类对 transactionManager bean 的过度强制吗？

Answer 1

我遇到了同样的问题，我的解决方案是实现 BatchConfigurer（保留 @EnableBatchProcessing）并手动添加 atomikos bean。

工作配置：

@Configuration
@EnableBatchProcessing
public class JobConfig implements BatchConfigurer {

    @Autowired
    private DataSource dataSource;

    @Autowired
    private JtaTransactionManager jtaTransactionManager;

    // ... skipping some code 

    @Override
    public JobRepository getJobRepository() throws Exception {
        JobRepositoryFactoryBean factory = new JobRepositoryFactoryBean();
        factory.setDataSource(dataSource);
        factory.setTransactionManager(jtaTransactionManager);
        return factory.getObject();
    }

    @Override
    public PlatformTransactionManager getTransactionManager() throws Exception {
        return jtaTransactionManager;
    }

    @Override
    public JobLauncher getJobLauncher() throws Exception {
        SimpleJobLauncher launcher = new SimpleJobLauncher();
        launcher.setJobRepository(getJobRepository());
        launcher.setTaskExecutor(new SimpleAsyncTaskExecutor());
        return launcher;
    }

    @Override
    public JobExplorer getJobExplorer() throws Exception {
        JobExplorerFactoryBean jobExplorerFactoryBean = new JobExplorerFactoryBean();
        jobExplorerFactoryBean.setDataSource(dataSource);
        jobExplorerFactoryBean.afterPropertiesSet();
        return jobExplorerFactoryBean.getObject();
    } 

AtomikosConfig：

@Configuration
public class AtomikosConfig extends AbstractJtaPlatform {

    @Bean(initMethod = "init", destroyMethod = "close")
    @DependsOn("atomikosUserTransactionService")
    public UserTransactionManager atomikosTransactionManager() {
            UserTransactionManager manager = new UserTransactionManager();
            manager.setForceShutdown(false);
            manager.setStartupTransactionService(false);
            return manager;
    }

    @Bean(initMethod = "init", destroyMethod = "shutdownForce")
    public UserTransactionServiceImp atomikosUserTransactionService() {
            Properties properties = new Properties();
            return new UserTransactionServiceImp(properties);
    }

    @Bean
    public UserTransactionImp atomikosUserTransaction() throws SystemException {
            UserTransactionImp transaction = new UserTransactionImp();
            transaction.setTransactionTimeout(300);
            return transaction;
    }

    @Primary
    @Bean
    public JtaTransactionManager jtaTransactionManager() throws Exception {
            JtaTransactionManager manager = new JtaTransactionManager();
            manager.setTransactionManager(atomikosTransactionManager());
            manager.setUserTransaction(atomikosUserTransaction());
            manager.setAllowCustomIsolationLevels(true);
            return manager;
    }

    @Bean
    public ActiveMQXAConnectionFactory xaFactory() {
            ActiveMQXAConnectionFactory factory = new ActiveMQXAConnectionFactory();
            factory.setBrokerURL("tcp://localhost:61616");
            factory.setUserName("admin");
            factory.setPassword("admin");
            //factory.setTrustAllPackages(true);
            factory.setTransactedIndividualAck(true);
            return factory;
    }

    @Bean(initMethod = "init", destroyMethod = "close")
    public AtomikosConnectionFactoryBean connectionFactory() {
            AtomikosConnectionFactoryBean factoryBean = new AtomikosConnectionFactoryBean();
            factoryBean.setUniqueResourceName("amq1");
            factoryBean.setXaConnectionFactory(xaFactory());
            factoryBean.setMaxPoolSize(10);
            return factoryBean;
    }

    @Bean
    public AtomikosJtaPlatform springJtaPlatformAdapter() throws Exception {
            AtomikosJtaPlatform platform = new AtomikosJtaPlatform();
            platform.setJtaTransactionManager(jtaTransactionManager());
            platform.setTransactionManager(atomikosTransactionManager());
            platform.setUserTransaction(atomikosUserTransaction());
            return platform;
    }

    @Override
    protected TransactionManager locateTransactionManager() {
            return atomikosTransactionManager();
    }

    @Override
    protected UserTransaction locateUserTransaction() {
            return atomikosTransactionManager();
    }

Answer 2

看了你的例子后，我可以告诉你的是——没有办法让自动配置工作——即使你禁用了事务管理的自动配置，你确实尝试过，任务和批处理自动配置（由@EnableBatchProcessing 和@EnableTask 触发）仍将注册他们自己的事务管理器，从而阻止Atomikos 配置被触发。这样做的原因是因为@EnableBatchProcessing 包含BatchConfigurationSelector 配置类，而后者又包含SimpleBatchConfiguration 或ModularBatchConfiguration，并且它们都将始终注册一个事务管理器——在任何一个bean 定义上都没有条件注释。 @EnableTask 做了一个非常相似的事情，只有SimpleTaskConfiguration。

因此，我能看到的唯一解决方法是让您完全手动创建批处理和任务配置。

至于如何手动配置批处理和任务，我建议查看SimpleTaskConfiguration 和AbstractBatchConfiguration - 你可以看到所有需要注册的bean。

或者，您可以看到一个批处理示例on this Java Code Geeks page，您只需将 XML 配置转换为 Java 配置。