SpringDataMongoDB多文档事务的实现

飞奔的炮台

mongodb4.0也出来一段时间了，这个版本最为大众期待的特性就是支持了多文档事务。这篇文章主要介绍了SpringDataMongoDB多文档事务的实现，感兴趣的小伙伴们可以参考一下
一、安装mongodb4.0.3（××）
1.1、官方安装文档
https://docs.mongodb.com/manual/tutorial/install-mongodb-on-red-hat/
1.2、tar.gz包下载地址
https://www.mongodb.com/download-center/community?jmp=docs
1.3、复制集官方配置
https://docs.mongodb.com/manual/administration/replica-set-member-configuration/
二、springproject版本依赖（×）
spring：5.1.1.release 以上
springdatamongodb:2.1.1.release 以上
三、配置mongotransactionmanager（springboot使用方式）
springboot 集成非常简单，配置mongotransastionmanager，目前spring-boot-starter-data-mongodb 版本较低不支持，因此暂未验证，springboot配置复制集参考springboot相关文档

@configuration
static class config extends abstractmongoconfiguration {
 
  @bean
  mongotransactionmanager transactionmanager(mongodbfactory dbfactory) { 
  return new mongotransactionmanager(dbfactory);
  }
 
  // ...
}

四、配置mongotransactionmanager（普通spring项目）

<context:property-placeholder location="classpath:mongo.properties" ignore-unresolvable="true"
  file-encoding="utf-8" />
 
<!-- 
  重点配置
  1.安全配置：credentials="${mongo.user}:${mongo.password}@${mongo.database}"
  2.单机配置：host="${mongo.host}" port="${mongo.port}"
  3.副本集配置：replica-set="${mongo.replset}"
-->
<mongo:mongo-client id="mongoclient" replica-set="${mongo.replset}">
  <mongo:client-options min-connections-per-host="${mongo.minconnectionsperhost}"
  write-concern="safe"
  read-preference="nearest"
  threads-allowed-to-block-for-connection-multiplier="${mongo.threadsallowedtoblockforconnectionmultiplier}"
  connect-timeout="${mongo.connecttimeout}" max-wait-time="${mongo.maxwaittime}"
  socket-keep-alive="${mongo.socketkeepalive}" socket-timeout="${mongo.sockettimeout}"
  max-connection-idle-time="${mongo.maxconnectionidletime}"
  max-connection-life-time="${mongo.maxconnectionlifetime}"
  heartbeat-socket-timeout="${mongo.heartbeatsockettimeout}"
  heartbeat-connect-timeout="${mongo.heartbeatconnecttimeout}"
  min-heartbeat-frequency="${mongo.minheartbeatfrequency}"
  heartbeat-frequency="${mongo.heartbeatfrequency}" />
</mongo:mongo-client>
 
<mongo:db-factory id="mongodbfactory" dbname="${mongo.database}"
  mongo-ref="mongoclient" />
 
<bean id="mappingcontext"
  class="org.springframework.data.mongodb.core.mapping.mongomappingcontext" />
 
<bean id="defaultmongotypemapper"
  class="org.springframework.data.mongodb.core.convert.defaultmongotypemapper">
  <constructor-arg name="typekey">
  <null />
  </constructor-arg>
</bean>
 
<bean id="mappingmongoconverter"
  class="org.springframework.data.mongodb.core.convert.mappingmongoconverter">
  <constructor-arg name="mongodbfactory" ref="mongodbfactory" />
  <constructor-arg name="mappingcontext" ref="mappingcontext" />
  <property name="typemapper" ref="defaultmongotypemapper" />
</bean>
 
<bean id="mongotemplate" class="org.springframework.data.mongodb.core.mongotemplate">
  <constructor-arg name="mongodbfactory" ref="mongodbfactory" />
  <constructor-arg name="mongoconverter" ref="mappingmongoconverter" />
</bean>
 
<!-- 重点配置 -->
 
<bean id="mongotransactionmanager" class="org.springframework.data.mongodb.mongotransactionmanager">
  <constructor-arg name="dbfactory" ref="mongodbfactory"/>
</bean>
 
<tx:annotation-driven transaction-manager="mongotransactionmanager" proxy-target-class="true"/>

五、使用事务（×）

@service
public class stateservice {
 
  @autowired
  private mongotemplate teplate;
 
  @transactional
  void somebusinessfunction(step step) {         
  template.insert(step);
  log.debug(1/0);
  };
});

六、mongo.properties 配置

mongo.host=192.168.1.66
mongo.port=27017
mongo.replset=192.168.1.66:2000,192.168.1.66:2001,192.168.1.66:2002
mongo.minconnectionsperhost=10
mongo.threadsallowedtoblockforconnectionmultiplier=4
mongo.connecttimeout=30000
mongo.maxwaittime=3000
mongo.socketkeepalive=false
mongo.sockettimeout=30000
mongo.maxconnectionidletime=0
mongo.maxconnectionlifetime=0
mongo.heartbeatsockettimeout=20000
mongo.heartbeatconnecttimeout=10000
mongo.minheartbeatfrequency=3000
mongo.heartbeatfrequency=5000
mongo.database=labsta

七、最后是重点（×××××）
7.1、必须使用复制集，单节点不支持，mongodb4.2 会支持分片集事务，复制集安装请自行研究
7.2、使用事务之前（@transaction），数据库和文档必须提前创建，如何解决呢？且看下篇
7.3、spring版本和springdatamongodb版本必须遵循 @springproject版本依赖
7.4、注意，此处的复制集不是4.0版本之前的主从复制集群，4.0之后已废弃主从模式
以上就是本文的全部内容，希望对大家的学习有所帮助，也希望大家多多支持CodeAE代码之家。
原文链接：https://www.jianshu.com/p/2faf0e6b6627