SpringBoot使用GTS的示例详解

1. 依赖类库txc-client.jar, txt-client-spring-cloud-2.0.1.jar

2. 使用TxcDataSource代理源数据源【注意：dbcp2.BasicDataSource不支持，可以使用DruidDataSource】

3. 添加自动配置类文件

package com.bodytrack.restapi;

import com.taobao.txc.client.aop.TxcTransactionScaner;
import com.taobao.txc.client.boot.TxcSpringBootProperties;
import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.boot.autoconfigure.condition.ConditionalOnProperty;
import org.springframework.boot.context.properties.EnableConfigurationProperties;
import org.springframework.context.ApplicationContext;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.context.annotation.DependsOn;

@Configuration
@EnableConfigurationProperties({TxcSpringBootProperties.class})
public class TxcSpringBootAutoConfiguration {
    @Autowired
    private TxcSpringBootProperties txcSpringBootProperties;
    @Autowired
    private ApplicationContext applicationContext;

    private static boolean isEmpty(String str) {
        return str == null || str.length() == 0;
    }

    @Bean(name = "txcScanner")
    @ConditionalOnProperty(
        prefix = "spring.boot.txc",
        name = {"txcServerGroup"}
    )
    //定义声明式事务，要想让事务annotation感知的话，要在这里定义一下
    public TxcTransactionScaner txcTransactionScaner() {
        String appName = this.txcSpringBootProperties.getTxcAppName() == null ? this.applicationContext.getEnvironment().getProperty("spring.application.name") : this.txcSpringBootProperties.getTxcAppName();
        String txServiceGroup = this.txcSpringBootProperties.getTxcServerGroup();
        int mode = this.txcSpringBootProperties.getMode() == 0 ? 1 : this.txcSpringBootProperties.getMode();
        TxcTransactionScaner txcTransactionScanner = new TxcTransactionScaner(appName, txServiceGroup, mode, this.txcSpringBootProperties.getUrl());
        if (!isEmpty(this.txcSpringBootProperties.getAccessKey())) {
            txcTransactionScanner.setAccessKey(this.txcSpringBootProperties.getAccessKey());
        }

        if (!isEmpty(this.txcSpringBootProperties.getSecretKey())) {
            txcTransactionScanner.setSecretKey(this.txcSpringBootProperties.getSecretKey());
        }

        return txcTransactionScanner;
    }
}

4. 添加GTS配置

spring:
    boot:
        txc:
           txcAppName: demo
           txcServerGroup: txc_test_public.1129361738553704.QD #公网测试的专用事务分组
           url: https://test-cs-gts.aliyuncs.com #公网测试url
           accessKey: xxx #非测试时需提供
           secretKey: xxxx #非测试时需提供

5. 发送rest请求时，请求添加header(TXC_XID,BEGIN_COUNT,COMMIT_COUNT)

public String callTestTxc() {
        HttpHeaders requestHeaders = new HttpHeaders();
        requestHeaders.set("TXC_XID", String.valueOf(TxcContext.getCurrentXid()));
        requestHeaders.set("BEGIN_COUNT", String.valueOf(TxcContext.getBeginCount()));
        requestHeaders.set("COMMIT_COUNT", String.valueOf(TxcContext.getCommitCount()));
        HttpEntity<String> entity = new HttpEntity<>("parameters", requestHeaders);
        String restUrl = String.format("%s/api/scoreService/testTxc", "http://10.0.0.5:8762");
        ResponseEntity<String> restData = restTemplate.exchange(restUrl, HttpMethod.GET, entity,  String.class);
        return restData.toString();
    }

6. 发起全局事务使用注解@TxcTransaction

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