springCloud分布式事务实战改造合服务BlockMicroService支持分布式事务

Posted 2021-01-16

在BlockMicroService 工程 中加入
（1）加入jar

    <!-- springCloud 事务 关键点1 -->
    <dependency>
            <groupId>com.codingapi</groupId>
            <artifactId>transaction-springcloud</artifactId>
            <version>${lcn.last.version}</version>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>*</artifactId>
                </exclusion>
            </exclusions>
        </dependency>
        <dependency>
            <groupId>com.codingapi</groupId>
            <artifactId>tx-plugins-db</artifactId>
            <version>${lcn.last.version}</version>
            <exclusions>
                <exclusion>
                    <groupId>org.slf4j</groupId>
                    <artifactId>*</artifactId>
                </exclusion>
            </exclusions>
        </dependency>

（2） 修改配置文件application.properties

连接 事务服务器
加上 关键点2
tm.manager.url=http://127.0.0.1:7000/tx/manager/

（3）添加2个代码文件

1 http请求服务TxManagerHttpRequestServiceImpl.java
package com.jh.service.impl;

import com.codingapi.tx.netty.service.TxManagerHttpRequestService;
import com.lorne.core.framework.utils.http.HttpUtils;
import org.springframework.stereotype.Service;

/**
 * http请求  //关键点3
 * 
 */

@Service
public class TxManagerHttpRequestServiceImpl implements TxManagerHttpRequestService{

    @Override
    public String httpGet(String url) {
        System.out.println("httpGet-start");
        String res = HttpUtils.get(url);
        System.out.println("httpGet-end");
        return res;
    }

    @Override
    public String httpPost(String url, String params) {
        System.out.println("httpPost-start");
        String res = HttpUtils.post(url,params);
        System.out.println("httpPost-end");
        return res;
    }
}

2 获取url TxManagerTxUrlServiceImpl.java

package com.jh.service.impl;

import com.codingapi.tx.config.service.TxManagerTxUrlService;
import org.springframework.beans.factory.annotation.Value;
import org.springframework.stereotype.Service;

/**
 * 获取url
 */
@Service
public class TxManagerTxUrlServiceImpl implements TxManagerTxUrlService{

    @Value("${tm.manager.url}")
    private String url;

    @Override
    public String getTxUrl() {
        System.out.println("load tm.manager.url ");
        return url;
    }
}

（4） 改造整合服务

@TxTransaction(isStart=true) //关键 4

    @Override
    @Transactional
    public int saveBlockTheme(Block block, Theme theme) {

        int rs1 = blockDao.saveBlock("jwg1", "111");// 3 保存1
        int rs2 = themeClient.saveTheme("jwg2", "111", 1);// 4 保存2
         int v = 100/0; //故障

        return rs1 + rs2;
            }