网站分类主要有哪些,海南城乡建设庁网站,东莞建设网官方网站首页,WordPress最强大的主题目录 一、seata使用场景
二、seata组成
三、seata服务端搭建
四、客户端使用seata
4.1 客户端增加undo_log表
4.2 客户端增加seata相关配置
4.3 客户端使用注解
五、测试 一、seata使用场景
微服务中#xff0c;一个业务涉及到多个微服务系统#xff0c;每个微服务…目录 一、seata使用场景
二、seata组成
三、seata服务端搭建
四、客户端使用seata
4.1 客户端增加undo_log表
4.2 客户端增加seata相关配置
4.3 客户端使用注解
五、测试 一、seata使用场景
微服务中一个业务涉及到多个微服务系统每个微服务系统连接不同的数据库要求数据一致性时使用。如下订单操作调用下订单方法后需要增加订单记录、减少产品库存订单记录和产品库存 调用不同的微服务 数据存储在不同的数据库中
调用下订单方法时订单服务或库存服务任何一个出现问题此方法执行失败数据库记录需回滚。
理论支持cap、base
理论依据二阶段提交法准备、执行三阶段提交法询问、准备、执行消息最终一致性最大努力通知法
解决方案tcctry-confirm-cancel、sega、X/A等。
二、seata组成
seata是spring cloud生态中的分布式事务解决方案包括seata服务端和客户端
seata服务端是独立部署的seata担当事务协调器角色
seata客户端即每个微服务增加相关依赖和配置使用GlobalTransactional(rollbackFor Exception.class)注解即可
三、seata服务端搭建
1. 下载seata服务端包
本文使用的是seata1.7.0版本的包。
2. 修改seata配置文件 application.yml使用nacos注册seata服务管理seata服务配置
路径seataconf,application.yml
# Copyright 1999-2019 Seata.io Group.
#
# Licensed under the Apache License, Version 2.0 (the License);
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an AS IS BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.server:port: 7091spring:application:name: seata-serverlogging:config: classpath:logback-spring.xmlfile:path: ${user.home}/logs/seataextend:logstash-appender:destination: 127.0.0.1:4560kafka-appender:bootstrap-servers: 127.0.0.1:9092topic: logback_to_logstash
console:user:username: seatapassword: seataseata:config:# support: nacos 、 consul 、 apollo 、 zk 、 etcd3type: nacosnacos:server-addr: 127.0.0.1:8948namespace:group: SEATA_GROUPusername: nacospassword: context-path:##if use MSE Nacos with auth, mutex with username/password attribute#access-key:#secret-key:data-id: seataServer.propertiesregistry:# support: nacos 、 eureka 、 redis 、 zk 、 consul 、 etcd3 、 sofatype: nacosnacos:application: seata-serverserver-addr: 127.0.0.1:8948group: SEATA_GROUPnamespace:cluster: defaultusername: nacospassword: context-path:##if use MSE Nacos with auth, mutex with username/password attribute#access-key:#secret-key:security:secretKey: tokenValidityInMilliseconds: 1800000ignore:urls: /,/**/*.css,/**/*.js,/**/*.html,/**/*.map,/**/*.svg,/**/*.png,/**/*.jpeg,/**/*.ico,/api/v1/auth/login
在nacos中增加seata配置 seataServer.properties配置文件
#For details about configuration items, see https://seata.io/zh-cn/docs/user/configurations.html
#Transport configuration, for client and server
transport.typeTCP
transport.serverNIO
transport.heartbeattrue
transport.enableTmClientBatchSendRequestfalse
transport.enableRmClientBatchSendRequesttrue
transport.enableTcServerBatchSendResponsefalse
transport.rpcRmRequestTimeout30000
transport.rpcTmRequestTimeout30000
transport.rpcTcRequestTimeout30000
transport.threadFactory.bossThreadPrefixNettyBoss
transport.threadFactory.workerThreadPrefixNettyServerNIOWorker
transport.threadFactory.serverExecutorThreadPrefixNettyServerBizHandler
transport.threadFactory.shareBossWorkerfalse
transport.threadFactory.clientSelectorThreadPrefixNettyClientSelector
transport.threadFactory.clientSelectorThreadSize1
transport.threadFactory.clientWorkerThreadPrefixNettyClientWorkerThread
transport.threadFactory.bossThreadSize1
transport.threadFactory.workerThreadSizedefault
transport.shutdown.wait3
transport.serializationseata
transport.compressornone#Transaction routing rules configuration, only for the client
service.vgroupMapping.default_tx_groupdefault
#If you use a registry, you can ignore it
service.default.grouplist127.0.0.1:8091
service.enableDegradefalse
service.disableGlobalTransactionfalse#Transaction rule configuration, only for the client
client.rm.asyncCommitBufferLimit10000
client.rm.lock.retryInterval10
client.rm.lock.retryTimes30
client.rm.lock.retryPolicyBranchRollbackOnConflicttrue
client.rm.reportRetryCount5
client.rm.tableMetaCheckEnabletrue
client.rm.tableMetaCheckerInterval60000
client.rm.sqlParserTypedruid
client.rm.reportSuccessEnablefalse
client.rm.sagaBranchRegisterEnablefalse
client.rm.sagaJsonParserfastjson
client.rm.tccActionInterceptorOrder-2147482648
client.tm.commitRetryCount5
client.tm.rollbackRetryCount5
client.tm.defaultGlobalTransactionTimeout60000
client.tm.degradeCheckfalse
client.tm.degradeCheckAllowTimes10
client.tm.degradeCheckPeriod2000
client.tm.interceptorOrder-2147482648
client.undo.dataValidationtrue
client.undo.logSerializationjackson
client.undo.onlyCareUpdateColumnstrue
server.undo.logSaveDays7
server.undo.logDeletePeriod86400000
client.undo.logTableundo_log
client.undo.compress.enabletrue
client.undo.compress.typezip
client.undo.compress.threshold64k
#For TCC transaction mode
tcc.fence.logTableNametcc_fence_log
tcc.fence.cleanPeriod1h#Log rule configuration, for client and server
log.exceptionRate100#Transaction storage configuration, only for the server. The file, db, and redis configuration values are optional.
store.modedb
store.lock.modedb
store.session.modedb
#Used for password encryption
store.publicKey#These configurations are required if the store mode is db. If store.mode,store.lock.mode,store.session.mode are not equal to db, you can remove the configuration block.
store.db.datasourcedruid
store.db.dbTypemysql
store.db.driverClassNamecom.mysql.cj.jdbc.Driver
store.db.urljdbc:mysql://127.0.0.1:3306/seata?useUnicodetruerewriteBatchedStatementstrue
store.db.userroot
store.db.password
store.db.minConn5
store.db.maxConn30
store.db.globalTableglobal_table
store.db.branchTablebranch_table
store.db.distributedLockTabledistributed_lock
store.db.queryLimit100
store.db.lockTablelock_table
store.db.maxWait5000#Transaction rule configuration, only for the server
server.recovery.committingRetryPeriod1000
server.recovery.asynCommittingRetryPeriod1000
server.recovery.rollbackingRetryPeriod1000
server.recovery.timeoutRetryPeriod1000
server.maxCommitRetryTimeout-1
server.maxRollbackRetryTimeout-1
server.rollbackRetryTimeoutUnlockEnablefalse
server.distributedLockExpireTime10000
server.xaerNotaRetryTimeout60000
server.session.branchAsyncQueueSize5000
server.session.enableBranchAsyncRemovefalse
server.enableParallelRequestHandlefalse#Metrics configuration, only for the server
metrics.enabledfalse
metrics.registryTypecompact
metrics.exporterListprometheus
metrics.exporterPrometheusPort98983. 创建seata服务所需数据库表
在seata script目录下找到sql脚本 执行sql语句建表
-- -------------------------------- The script used when storeMode is db --------------------------------
-- the table to store GlobalSession data
CREATE TABLE IF NOT EXISTS global_table
(xid VARCHAR(128) NOT NULL,transaction_id BIGINT,status TINYINT NOT NULL,application_id VARCHAR(32),transaction_service_group VARCHAR(32),transaction_name VARCHAR(128),timeout INT,begin_time BIGINT,application_data VARCHAR(2000),gmt_create DATETIME,gmt_modified DATETIME,PRIMARY KEY (xid),KEY idx_status_gmt_modified (status , gmt_modified),KEY idx_transaction_id (transaction_id)
) ENGINE InnoDBDEFAULT CHARSET utf8mb4;-- the table to store BranchSession data
CREATE TABLE IF NOT EXISTS branch_table
(branch_id BIGINT NOT NULL,xid VARCHAR(128) NOT NULL,transaction_id BIGINT,resource_group_id VARCHAR(32),resource_id VARCHAR(256),branch_type VARCHAR(8),status TINYINT,client_id VARCHAR(64),application_data VARCHAR(2000),gmt_create DATETIME(6),gmt_modified DATETIME(6),PRIMARY KEY (branch_id),KEY idx_xid (xid)
) ENGINE InnoDBDEFAULT CHARSET utf8mb4;-- the table to store lock data
CREATE TABLE IF NOT EXISTS lock_table
(row_key VARCHAR(128) NOT NULL,xid VARCHAR(128),transaction_id BIGINT,branch_id BIGINT NOT NULL,resource_id VARCHAR(256),table_name VARCHAR(32),pk VARCHAR(36),status TINYINT NOT NULL DEFAULT 0 COMMENT 0:locked ,1:rollbacking,gmt_create DATETIME,gmt_modified DATETIME,PRIMARY KEY (row_key),KEY idx_status (status),KEY idx_branch_id (branch_id),KEY idx_xid (xid)
) ENGINE InnoDBDEFAULT CHARSET utf8mb4;CREATE TABLE IF NOT EXISTS distributed_lock
(lock_key CHAR(20) NOT NULL,lock_value VARCHAR(20) NOT NULL,expire BIGINT,primary key (lock_key)
) ENGINE InnoDBDEFAULT CHARSET utf8mb4;INSERT INTO distributed_lock (lock_key, lock_value, expire) VALUES (AsyncCommitting, , 0);
INSERT INTO distributed_lock (lock_key, lock_value, expire) VALUES (RetryCommitting, , 0);
INSERT INTO distributed_lock (lock_key, lock_value, expire) VALUES (RetryRollbacking, , 0);
INSERT INTO distributed_lock (lock_key, lock_value, expire) VALUES (TxTimeoutCheck, , 0);
四、客户端使用seata
示例由三个服务组成seataDemoWeb、demo-order、demo-product
其中seataDemoWeb服务提供rest接口test此接口调用demo-order和demo-product服务增加订单记录修改库存。
4.1 客户端增加undo_log表
demo-order和demo-product两个服务对应的数据库均需增加undo_log表
建表语句
CREATE TABLE undo_log (id bigint(20) NOT NULL AUTO_INCREMENT,branch_id bigint(20) NOT NULL,xid varchar(100) NOT NULL,context varchar(128) NOT NULL,rollback_info longblob NOT NULL,log_status int(11) NOT NULL,log_created datetime NOT NULL,log_modified datetime NOT NULL,ext varchar(100) DEFAULT NULL,PRIMARY KEY (id),UNIQUE KEY ux_undo_log (xid,branch_id)
) ENGINEInnoDB AUTO_INCREMENT1 DEFAULT CHARSETutf8;
4.2 客户端增加seata相关配置
seataDemoWeb、demo-order和demo-product在application.properties中增加seata配置
seata.enabledtrue
seata.application-id${spring.application.name}
seata.tx-service-groupseata-tx-group
seata.service.vgroup-mapping.seata-tx-groupdefault
seata.registry.typenacos
seata.registry.nacos.server-addr127.0.0.1:8948
seata.registry.nacos.usernamenacos
seata.registry.nacos.password
seata.registry.nacos.namespacepublic
seata.registry.nacos.groupSEATA_GROUP
seata.registry.nacos.applicationseata-server
pom增加seata依赖完整pom.xml
?xml version1.0 encodingUTF-8?
project xmlnshttp://maven.apache.org/POM/4.0.0 xmlns:xsihttp://www.w3.org/2001/XMLSchema-instancexsi:schemaLocationhttp://maven.apache.org/POM/4.0.0 https://maven.apache.org/xsd/maven-4.0.0.xsdmodelVersion4.0.0/modelVersionparentgroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-parent/artifactIdversion2.2.10.RELEASE/versionrelativePath/ !-- lookup parent from repository --/parentgroupIdhj.example/groupIdartifactIdproductDemo/artifactIdversion1.0.0/versionpackagingjar/packagingpropertieslombok.version1.18.24/lombok.version/propertiesdependenciesdependencygroupIdhj.example/groupIdartifactIddemoCommon/artifactIdversion1.0.0/version/dependencydependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter/artifactId/dependencydependencygroupIdorg.springframework.boot/groupIdartifactIdspring-boot-starter-web/artifactId/dependencydependencygroupIdmysql/groupIdartifactIdmysql-connector-java/artifactIdversion8.0.12/version/dependencydependencygroupIdorg.projectlombok/groupIdartifactIdlombok/artifactIdversion${lombok.version}/version/dependency!-- nacos --dependencygroupIdcom.alibaba.cloud/groupIdartifactIdspring-cloud-starter-alibaba-nacos-discovery/artifactIdversion2.2.5.RELEASE/version/dependencydependencygroupIdcom.alibaba.cloud/groupIdartifactIdspring-cloud-starter-alibaba-nacos-config/artifactIdversion2.2.5.RELEASE/version/dependencydependencygroupIdcom.alibaba.cloud/groupIdartifactIdspring-cloud-starter-dubbo/artifactIdversion2.2.5.RELEASE/version/dependency!-- seata --dependencygroupIdcom.alibaba.cloud/groupIdartifactIdspring-cloud-starter-alibaba-seata/artifactIdversion2.2.5.RELEASE/versionexclusionsexclusiongroupIdio.seata/groupIdartifactIdseata-spring-boot-starter/artifactId/exclusion/exclusions/dependencydependencygroupIdio.seata/groupIdartifactIdseata-spring-boot-starter/artifactIdversion1.7.0/version/dependency/dependencies
/project 4.3 客户端使用注解
在seataDemoWeb服务中增加GlobalTransaction注解
package hj.example.seatademoweb.controller;import com.baomidou.mybatisplus.extension.service.IService;
import hj.example.democommon.entity.DemoOrder;
import hj.example.democommon.entity.DemoProduct;
import hj.example.democommon.entity.StateEnum;
import hj.example.democommon.services.DemoOrderService;
import hj.example.democommon.services.DemoProductService;
import io.seata.spring.annotation.GlobalTransactional;
import org.apache.dubbo.config.annotation.DubboReference;
import org.springframework.http.HttpStatus;
import org.springframework.http.ResponseEntity;
import org.springframework.web.bind.annotation.RequestMapping;
import org.springframework.web.bind.annotation.RestController;import java.util.Random;/*** Description: TODO* Author: * Date: 2023/8/29**/
RestController
public class TestController {DubboReference(interfaceName demoOrderService)private DemoOrderService demoOrderService;DubboReference(interfaceName demoProductService)private DemoProductService demoProductService;RequestMapping(/test)GlobalTransactional(rollbackFor Exception.class)public ResponseEntityObject test() {DemoOrder demoOrder new DemoOrder();demoOrder.setAccountId(1);demoOrder.setState(StateEnum.NEW.name());demoOrderService.save(demoOrder);DemoProduct demoProduct new DemoProduct();demoProduct.setNum(Math.random()*10000);demoProductService.save(demoProduct);return new ResponseEntity(success, HttpStatus.OK);}
}五、测试
修改4.3中的代码debug查看回滚
DemoProduct demoProduct new DemoProduct();
demoProduct.setNum(1/0);
demoProductService.save(demoProduct);
