SpringBoot整合atomikos实现跨库事务的详细方案

 <dependency>
            <groupId>org.springframework.boot</groupId>
            <artifactId>spring-boot-starter-jta-atomikos</artifactId>
        </dependency>

 //主数据源xa模式
    @Bean
    @Qualifier("masterXADataSource")
    public DataSource masterXADataSource() {
        DruidXADataSource datasource = new DruidXADataSource();
        if(driverClassName.equals("com.mysql.cj.jdbc.Driver")){
            if(!dbUrl.contains("useOldAliasMetadataBehavior")){
                dbUrl += "&useOldAliasMetadataBehavior=true";
            }
            if(!dbUrl.contains("useAffectedRows")){
                dbUrl += "&useAffectedRows=true";
            }
        }
        datasource.setUrl(this.dbUrl);
        datasource.setUsername(username);
        datasource.setPassword(password);
        datasource.setDriverClassName(driverClassName);
        //configuration
        datasource.setInitialSize(1);
        datasource.setMinIdle(3);
        datasource.setMaxActive(20);
        datasource.setMaxWait(60000);
        datasource.setTimeBetweenEvictionRunsMillis(60000);
        datasource.setMinEvictableIdleTimeMillis(60000);
        datasource.setValidationQuery("select 'x'");
        datasource.setTestWhileIdle(true);
        datasource.setTestOnBorrow(false);
        datasource.setTestOnReturn(false);
        datasource.setPoolPreparedStatements(true);
        datasource.setMaxPoolPreparedStatementPerConnectionSize(20);
        datasource.setLogAbandoned(false); //移除泄露连接发生是是否记录日志
        try {
            datasource.setFilters("stat,slf4j");
        } catch (SQLException e) {
            logger.error("druid configuration initialization filter", e);
        }
        datasource.setConnectionProperties("druid.stat.mergeSql=true;druid.stat.slowSqlMillis=5000");//connectionProperties);

        AtomikosDataSourceBean atomikosDataSourceBean = new AtomikosDataSourceBean();
        atomikosDataSourceBean.setXaDataSourceClassName("com.alibaba.druid.pool.xa.DruidXADataSource");
        atomikosDataSourceBean.setUniqueResourceName("master-xa");
        atomikosDataSourceBean.setXaDataSource(datasource);
        atomikosDataSourceBean.setPoolSize(5);
        atomikosDataSourceBean.setMaxPoolSize(20);
        atomikosDataSourceBean.setTestQuery("select 1");
        return atomikosDataSourceBean;
    }

    //xa模式全局事务管理器
    @Bean(name = "jtaTransactionManager")
    public PlatformTransactionManager transactionManager() throws Throwable {
        UserTransactionManager userTransactionManager = new UserTransactionManager();
        UserTransaction userTransaction = new UserTransactionImp();
        JtaTransactionManager jtaTransactionManager =  new JtaTransactionManager(userTransaction, userTransactionManager);
        jtaTransactionManager.setAllowCustomIsolationLevels(true);
        return jtaTransactionManager;
    }

@Target({ElementType.METHOD})
@Retention(RetentionPolicy.RUNTIME)
@Inherited
@Documented
@Transactional(rollbackFor = Exception.class,isolation = Isolation.READ_UNCOMMITTED,transactionManager = "jtaTransactionManager")
public @interface GlobalTransactional {
}

@Aspect
@Component
@Order(value = 99)
public class GlobalTransitionAspect {
    private static Logger logger = LoggerFactory.getLogger(GlobalTransitionAspect.class);
    @Autowired
    private DynamicDataSource dynamicDataSource;

    /**
     * 切面点 指定注解
     */
    @Pointcut("@annotation(com.code2roc.fastkernel.datasource.GlobalTransactional) " +
            "|| @within(com.code2roc.fastkernel.datasource.GlobalTransactional)")
    public void dataSourcePointCut() {

    }

    /**
     * 拦截方法指定为 dataSourcePointCut
     */
    @Around("dataSourcePointCut()")
    public Object around(ProceedingJoinPoint point) throws Throwable {
        MethodSignature signature = (MethodSignature) point.getSignature();
        Method method = signature.getMethod();
        GlobalTransactional methodAnnotation = method.getAnnotation(GlobalTransactional.class);
        if (methodAnnotation != null) {
            DataSourceContextHolder.tagGlobal();
            logger.info("标记全局事务");
        }
        try {
            return point.proceed();
        } finally {
            logger.info("清除全局事务");
            DataSourceContextHolder.clearGlobal();
        }
    }
}

public class DataSourceContextHolder {
    private static Logger log = LoggerFactory.getLogger(DataSourceContextHolder.class);
    // 对当前线程的操作-线程安全的
    private static final ThreadLocal<String> contextHolder = new ThreadLocal<String>();
    private static final ThreadLocal<String> contextGlobalHolder = new ThreadLocal<String>();

    // 调用此方法，切换数据源
    public static void setDataSource(String dataSource) {
        contextHolder.set(dataSource);
        log.debug("已切换到数据源:{}", dataSource);
    }

    // 获取数据源
    public static String getDataSource() {
        String value = contextHolder.get();
        if (StringUtil.isEmpty(value)) {
            value = "master";
        }
        if (!StringUtil.isEmpty(getGlobal())) {
            value = value + "-xa";
        }
        return value;
    }

    // 删除数据源
    public static void clearDataSource() {
        contextHolder.remove();
        log.debug("已切换到主数据源");
    }

    //====================全局事务标记================
    public static void tagGlobal() {
        contextGlobalHolder.set("1");
    }

    public static String getGlobal() {
        String value = contextGlobalHolder.get();
        return value;
    }

    public static void clearGlobal() {
        contextGlobalHolder.remove();
    }
    //===================================================
}

com.atomikos.icatch.log_base_dir= tempfiles/transition/