springboot jta atomikos實現分散式事物管理
阿新 • • 發佈:2020-01-07
這篇文章主要介紹了springboot jta atomikos實現分散式事物管理,文中通過示例程式碼介紹的非常詳細,對大家的學習或者工作具有一定的參考學習價值,需要的朋友可以參考下
當專案在連線多個數據庫時可能會發生事務問題,即一個庫的事務不可能去操作另一個數據庫的事務,這時就需要使用atomikos對資料庫的事務進行統一的管理
第一步新增atomikos的依賴
<dependency> <groupId>org.springframework.boot</groupId> <artifactId>spring-boot-starter-jta-atomikos</artifactId> </dependency>
第二步配置資料來源,我這裡有2個數據庫(ruan和youxianqi),你有多少就加多少。
spring: datasource: system: jdbc-url: jdbc:oracle:thin:@localhost:1521/orcl driver-class-name: oracle.jdbc.OracleDriver username: yuan password: 1234 initial-size: 5 min-idle: 5 max-active: 20 min-evictable-idle-time-millis: 300000 validation-query: SELECT 1 FROM DUAL test-while-idle: true kllogt: jdbc-url: jdbc:oracle:thin:@localhost:1521/orcl driver-class-name: oracle.jdbc.OracleDriver username: youxianqi password: youxianqi initial-size: 5 min-idle: 5 max-active: 20 min-evictable-idle-time-millis: 300000 validation-query: SELECT 1 FROM DUAL test-while-idle: true logging: level: org.springframework.web: debug
然後建立DBConfig1和DBConfig2,這兩個實體類就是存放兩個資料來源的資料的。
package com.cgb.config; import org.springframework.boot.context.properties.ConfigurationProperties; @ConfigurationProperties(prefix = "spring.datasource.system") public class DBConfig1 { private String jdbc-url; private String username; private String password; private int minPoolSize; private int maxPoolSize; private int maxLifetime; private int borrowConnectionTimeout; private int loginTimeout; private int maintenanceInterval; private int maxIdleTime; private String testQuery; public String getJdbc-url() { return url; } public void setJdbc-url(String jdbc-url) { this.jdbc-url= jdbc-url; } public String getUsername() { return username; } public void setUsername(String username) { this.username = username; } public String getPassword() { return password; } public void setPassword(String password) { this.password = password; } public int getMinPoolSize() { return minPoolSize; } public void setMinPoolSize(int minPoolSize) { this.minPoolSize = minPoolSize; } public int getMaxPoolSize() { return maxPoolSize; } public void setMaxPoolSize(int maxPoolSize) { this.maxPoolSize = maxPoolSize; } public int getMaxLifetime() { return maxLifetime; } public void setMaxLifetime(int maxLifetime) { this.maxLifetime = maxLifetime; } public int getBorrowConnectionTimeout() { return borrowConnectionTimeout; } public void setBorrowConnectionTimeout(int borrowConnectionTimeout) { this.borrowConnectionTimeout = borrowConnectionTimeout; } public int getLoginTimeout() { return loginTimeout; } public void setLoginTimeout(int loginTimeout) { this.loginTimeout = loginTimeout; } public int getMaintenanceInterval() { return maintenanceInterval; } public void setMaintenanceInterval(int maintenanceInterval) { this.maintenanceInterval = maintenanceInterval; } public int getMaxIdleTime() { return maxIdleTime; } public void setMaxIdleTime(int maxIdleTime) { this.maxIdleTime = maxIdleTime; } public String getTestQuery() { return testQuery; } public void setTestQuery(String testQuery) { this.testQuery = testQuery; } }
然後建立兩個資料來源RuanMyBatisConfig和YouMyBatisConfig,注意@Primary註解只能有一個。
package com.cgb.datasource; import java.sql.SQLException; import javax.sql.DataSource; import org.apache.ibatis.session.SqlSessionFactory; import org.mybatis.spring.SqlSessionFactoryBean; import org.mybatis.spring.SqlSessionTemplate; import org.mybatis.spring.annotation.MapperScan; import org.springframework.beans.factory.annotation.Qualifier; import org.springframework.context.annotation.Bean; import org.springframework.context.annotation.Configuration; import org.springframework.context.annotation.Primary; import com.atomikos.jdbc.AtomikosDataSourceBean; import com.cgb.config.DBConfig1; import com.mysql.jdbc.jdbc2.optional.MysqlXADataSource; @Configuration @MapperScan(basePackages = "com.cgb.ruan",sqlSessionTemplateRef = "testSqlSessionTemplate") public class RuanMyBatisConfig { // 配置資料來源 @Primary @Bean(name = "dataSource1") public DataSource testDataSource(DBConfig1 testConfig) throws SQLException { MysqlXADataSource mysqlXaDataSource = new MysqlXADataSource(); mysqlXaDataSource.setUrl(testConfig.getUrl()); mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true); mysqlXaDataSource.setPassword(testConfig.getPassword()); mysqlXaDataSource.setUser(testConfig.getUsername()); mysqlXaDataSource.setPinGlobalTxToPhysicalConnection(true); AtomikosDataSourceBean xaDataSource = new AtomikosDataSourceBean(); xaDataSource.setXaDataSource(mysqlXaDataSource); xaDataSource.setUniqueResourceName("dataSource1"); xaDataSource.setMinPoolSize(testConfig.getMinPoolSize()); xaDataSource.setMaxPoolSize(testConfig.getMaxPoolSize()); xaDataSource.setMaxLifetime(testConfig.getMaxLifetime()); xaDataSource.setBorrowConnectionTimeout(testConfig.getBorrowConnectionTimeout()); xaDataSource.setLoginTimeout(testConfig.getLoginTimeout()); xaDataSource.setMaintenanceInterval(testConfig.getMaintenanceInterval()); xaDataSource.setMaxIdleTime(testConfig.getMaxIdleTime()); xaDataSource.setTestQuery(testConfig.getTestQuery()); return xaDataSource; } @Bean(name = "testSqlSessionFactory") public SqlSessionFactory testSqlSessionFactory(@Qualifier("dataSource1") DataSource dataSource) throws Exception { SqlSessionFactoryBean bean = new SqlSessionFactoryBean(); bean.setDataSource(dataSource); return bean.getObject(); } @Bean(name = "testSqlSessionTemplate") public SqlSessionTemplate testSqlSessionTemplate( @Qualifier("testSqlSessionFactory") SqlSessionFactory sqlSessionFactory) throws Exception { return new SqlSessionTemplate(sqlSessionFactory); } }
其實在多個數據源的時候,我們怎麼去指定資料庫呢?
其中一個做法是寫註解,表明使用哪個資料庫,但是這種是不是很麻煩。最好的做法是分包管理:
好啦,大功告成,我們來看看效果吧。
我們發現控制檯列印新增學生成功,好我們看看資料庫裡有沒有資料呢?
毫無疑問是沒有的,說明事務起作用了。那我們把那行異常程式碼註釋掉,再看看效果。成功了,去看看資料庫有沒有呢。
ojbk,想想同時操作多個數據庫,是不是很爽啊,哈哈哈。
以上就是本文的全部內容,希望對大家的學習有所幫助,也希望大家多多支援我們。