Question: Seata与Dubbo整合如何开启TCC自动代理？

[PVulcanCN]

问题描述

我使用Seata与Dubbo整合的demo，在阅读Seata文档的时候看到如果Seata和Dubbo配合使用无需使用@LocalTCC注解。

@LocalTCC注解用来表示实现了二阶段提交的本地的TCC接口。如果使用Dubbo作为RPC通信组件则无须用此注解。

但是当我去除掉@LocalTCC的时候则发现无法进行代理。

追踪源码发现在GlobalTransactionScanner.wrapIfNecessary方法中TCCBeanParserUtils.isTccAutoProxy(bean, beanName, applicationContext)并没有为true

在其中发现DubboRemotingParser.isReference和isRemotingFactoryBean中调用的!SpringProxyUtils.isProxy(bean)均没有识别到代理

请问应该如何进行配置才能使用Dubbo的TCC自动代理呢？

[funky-eyes]

Show me your code.

[PVulcanCN]

Show me your code.

一、Code

1、公共包定义RPC接口

public interface IOrderService {

    @TwoPhaseBusinessAction(name = "createOrder", commitMethod = "commitOrder", rollbackMethod = "rollBackOrder", useTCCFence = true)
    String createOrder(BusinessActionContext businessActionContext, @BusinessActionContextParameter(paramName = "order") Order order);

    /**
     * 由TC发起调用的提交
     *
     * @param businessActionContext 上下文
     * @return 成功或失败
     */
    boolean commitOrder(BusinessActionContext businessActionContext);


    /**
     * 由TC发起调用的回滚
     *
     * @param businessActionContext 上下文
     * @return 成功或失败
     */
    boolean rollBackOrder(BusinessActionContext businessActionContext);
}

public interface IPolicyService {

    @TwoPhaseBusinessAction(name = "createPolicy", commitMethod = "commitPolicy", rollbackMethod = "rollBackPolicy", useTCCFence = true)
    String createPolicy(BusinessActionContext businessActionContext, @BusinessActionContextParameter(paramName = "policy") Policy policy);

    /**
     * 由TC发起调用的提交
     *
     * @param businessActionContext 上下文
     * @return 成功或失败
     */
    boolean commitPolicy(BusinessActionContext businessActionContext);


    /**
     * 由TC发起调用的回滚
     *
     * @param businessActionContext 上下文
     * @return 成功或失败
     */
    boolean rollBackPolicy(BusinessActionContext businessActionContext);
}

2、Order服务实现

import com.alibaba.fastjson2.JSONObject;
import io.seata.core.context.RootContext;
import io.seata.rm.tcc.api.BusinessActionContext;
import io.seata.rm.tcc.api.TwoPhaseBusinessAction;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.apache.dubbo.config.annotation.DubboService;
import org.springframework.transaction.annotation.Transactional;

import java.util.UUID;

@Slf4j
@DubboService(interfaceClass = IOrderService.class)
@RequiredArgsConstructor
public class OrderService implements IOrderService {
    //......
}

3、Policy服务实现

import com.alibaba.fastjson2.JSONObject;
import io.seata.core.context.RootContext;
import io.seata.rm.tcc.api.BusinessActionContext;
import io.seata.rm.tcc.api.TwoPhaseBusinessAction;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.apache.dubbo.config.annotation.DubboService;
import org.springframework.transaction.annotation.Transactional;
import java.util.UUID;

@Slf4j
@DubboService(interfaceClass = IPolicyService.class)
@RequiredArgsConstructor
public class PolicyService implements IPolicyService {
    //....
}

4、使用者

import io.seata.core.context.RootContext;
import io.seata.spring.annotation.GlobalTransactional;
import lombok.RequiredArgsConstructor;
import lombok.extern.slf4j.Slf4j;
import org.apache.dubbo.config.annotation.DubboReference;
import org.apache.dubbo.config.spring.ReferenceBean;
import org.springframework.stereotype.Service;
import org.springframework.transaction.annotation.Transactional;

@Service
@Slf4j
@RequiredArgsConstructor
public class ProductService implements IProductService {

    @DubboReference(interfaceClass = IPolicyService.class)
    private final IPolicyService policyService;

    @DubboReference(interfaceClass = IOrderService.class)
    private final IOrderService orderService;

    private final ProductMapper productMapper;

}

二、尝试

在看过源码后，尝试使用了注入ReferenceBean的方式开启，但未成功

@Configuration
public class Config {

    @Bean
    @DubboReference(interfaceClass = IOrderService.class)
    public ReferenceBean<IOrderService> orderService() {
        return new ReferenceBean();
    }

    @Bean
    @DubboReference(interfaceClass = IPolicyService.class)
    public ReferenceBean<IPolicyService> policyService() {
        return new ReferenceBean();
    }

}

可能是缺了什么配置，没有找到相关描述

[funky-eyes]

Can you provide us with your demo to help us troubleshoot?

[PVulcanCN]

Can you provide us with your demo to help us troubleshoot?

https://github.com/PVulcanCN/Seata-Dubbo-TCC-demo.git

[slievrly]

Support for org.apache.dubbo.config.annotation.Reference is available after version 1.3.0.

[laywin]

there is a bug need to be fixed.