springboot 整合seata ， 15.1 版本如何手动设置数据源代理？

springboot 整合seata ， 15.1 版本如何手动设置数据源代理？ 看官网上面说“若外部实现初始化，请参考SeataAutoConfiguration保证依赖加载顺序”，但是按照这个来并没有成功是什么原因呢？ 代码如下：

@Slf4j @Slf4j @ConditionalOnProperty( prefix = "seata", name = {"enabled"}, havingValue = "true", matchIfMissing = true ) @AutoConfigureAfter({SeataCoreAutoConfiguration.class}) public class SeataProxyConfig {

@Bean({"failureHandler"})
@ConditionalOnMissingBean({FailureHandler.class})
public FailureHandler failureHandler() {
    return new DefaultFailureHandlerImpl();
}

@Bean
@DependsOn({"springApplicationContextProvider", "failureHandler"})
@ConditionalOnMissingBean({GlobalTransactionScanner.class})
public GlobalTransactionScanner globalTransactionScanner(SeataProperties seataProperties, FailureHandler failureHandler,
                                                         ConfigurableListableBeanFactory beanFactory,
                                                         @Autowired(required = false) List<ScannerChecker> scannerCheckers) {
    log.info("Automatically configure Seata");
    GlobalTransactionScanner.setBeanFactory(beanFactory);
    GlobalTransactionScanner.addScannerCheckers(EnhancedServiceLoader.loadAll(ScannerChecker.class));
    GlobalTransactionScanner.addScannerCheckers(scannerCheckers);
    GlobalTransactionScanner.addScannablePackages(seataProperties.getScanPackages());
    GlobalTransactionScanner.addScannerExcludeBeanNames(seataProperties.getExcludesForScanning());
    GlobalTransactionScanner.setAccessKey(seataProperties.getAccessKey());
    GlobalTransactionScanner.setSecretKey(seataProperties.getSecretKey());
    return new GlobalTransactionScanner(seataProperties.getApplicationId(), seataProperties.getTxServiceGroup(), failureHandler);
}

}