前面簡單介紹了JOTM如何在Spring中配置，并如何使用它的JTA事務，本節將介紹Atomikos如何與Spring集成，并使用它的JTA事務。?

Atomikos,是一個基于Java的開源事務管理器，提供了事務管理和連接池，不需要應用服務器支持，支持JDBC和JMS事務，能提供對Spring，Hibernate的集成，有興趣多了解的可以直接參考說明文當，有詳細的介紹和使用說明。?

Atomikos可以到http://www.atomikos.com/products.html#ate下載,最新版本是3.2.0?

首先,仍然是一個相關的配置文件，用來設置相關的環境,打開解壓縮后Atomikos根目錄,拷貝jta.properties到classpath中，并修改為如下內容?
jta.properties?

Java代碼??

com.atomikos.icatch.service=com.atomikos.icatch.standalone.UserTransactionServiceFactory??

com.atomikos.icatch.console_file_name?=?tm.out??

com.atomikos.icatch.log_base_name?=?tmlog??

com.atomikos.icatch.tm_unique_name?=?com.atomikos.spring.jdbc.tm??

com.atomikos.icatch.console_log_level?=?INFO???

隨后，是Spring上下文配置，建立一個名為ApplicationContext-atomikos.xml的Spring上下文?

ApplicationContext-atomikos.xml?

Java代碼??

<?xml?version="1.0"?encoding="UTF-8"?>??

<beans?xmlns="http://www.springframework.org/schema/beans"??

????xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"??

????xsi:schemaLocation="http://www.springframework.org/schema/beans?http://www.springframework.org/schema/beans/spring-beans-2.0.xsd">??

????<!--?XA?Datasource?-->??

????<bean?id="datasource1"?class="com.atomikos.jdbc.SimpleDataSourceBean"?init-method="init"?destroy-method="close">?????

????????<property?name="uniqueResourceName">?????

????????????<value>mysql/main</value>?????

????????</property>?????

????????<property?name="xaDataSourceClassName">?????

????????????<value>com.mysql.jdbc.jdbc2.optional.MysqlXADataSource</value>?????

????????</property>?????

????????<property?name="xaDataSourceProperties">?????

????????????<value>URL=jdbc:mysql://localhost:3306/test;user=root;password=admin</value>?????

????????</property>?????

????????<property?name="exclusiveConnectionMode">?????

????????????<value>true</value>?????

????????</property>?????

????????<property?name="connectionPoolSize">?????

????????????<value>3</value>?????

????????</property>?????

????????<property?name="validatingQuery">?????

????????????<value>SELECT?1</value>?????

????????</property>?????

????</bean>??

??????

????<bean?id="datasource2"?class="com.atomikos.jdbc.SimpleDataSourceBean"?init-method="init"?destroy-method="close">?????

????????<property?name="uniqueResourceName">?????

????????????<value>mysql/news</value>??

????????</property>?????

????????<property?name="xaDataSourceClassName">?????

????????????<value>com.mysql.jdbc.jdbc2.optional.MysqlXADataSource</value>?????

????????</property>??

????????<property?name="xaDataSourceProperties">?????

????????????<value>URL=jdbc:mysql://localhost:3306/test2;user=root;password=admin</value>?????

????????</property>?????

????????<property?name="exclusiveConnectionMode">?????

????????????<value>true</value>?????

????????</property>?????

????????<property?name="connectionPoolSize">?????

????????????<value>3</value>?????

????????</property>?????

????????<property?name="validatingQuery">?????

????????????<value>SELECT?1</value>?????

????????</property>?????

????</bean>??

??????

????<bean?id="template1"?class="org.springframework.jdbc.core.JdbcTemplate">??

????????<property?name="dataSource"?ref="datasource1"?/>??

????</bean>??

??????

????<bean?id="template2"?class="org.springframework.jdbc.core.JdbcTemplate">??

????????<property?name="dataSource"?ref="datasource2"?/>??

????</bean>??

??????????

????<bean?id="atomikosTransactionManager"?class="com.atomikos.icatch.jta.UserTransactionManager"?init-method="init"?destroy-method="close">??

????????<property?name="forceShutdown"><value>true</value></property>??

????</bean>??

??????

????<bean?id="atomikosUserTransaction"?class="com.atomikos.icatch.jta.UserTransactionImp">??

????????<property?name="transactionTimeout"?value="300"/>???

????</bean>??

??

????<bean?id="springTransactionManager"?class="org.springframework.transaction.jta.JtaTransactionManager">??

????????<property?name="transactionManager"><ref?bean="atomikosTransactionManager"??/></property>??

????????<property?name="userTransaction"><ref?bean="atomikosUserTransaction"??/></property>??

????</bean>??

??????

????<bean?id="dao1"?class="com.xa.dao.UserDao1">??

????????<property?name="jdbcTemplate">??

????????????<ref?bean="template1"></ref>??

????????</property>??

????</bean>??

??????

????<bean?id="dao2"?class="com.xa.dao.UserDao2">??

????????<property?name="jdbcTemplate">??

????????????<ref?bean="template2"></ref>??

????????</property>??

????</bean>??

????<!--?-->??

????<bean?id="userServiceTarget"?class="com.xa.service.UserServiceImpl">??

????????<property?name="dao1"?ref="dao1"/>??

????????<property?name="dao2"?ref="dao2"/>??

????</bean>??

??????

????<bean?id="userTest"?class="org.springframework.transaction.interceptor.TransactionProxyFactoryBean">??????

????????<property?name="transactionManager">??

????????????<ref?bean="springTransactionManager"/>??

????????</property>??????

????????<property?name="target">??

????????????<ref?bean="userServiceTarget"/>??

????????</property>??

????????<property?name="transactionAttributes">??????????

????????????<props>??

????????????????<prop?key="insert*">PROPAGATION_REQUIRED,-Exception</prop>??????????????

????????????</props>??

????????</property>??

????</bean>??

</beans>??

看上下文中的代碼，很大部分和JOTM的相似，atomikos使用com.atomikos.jdbc.SimpleDataSourceBean類來創建datasource bean，這里需要特別注意?

Java代碼??

<property?name="uniqueResourceName">?????

????<value>mysql/main</value>?????

</property>????

Java代碼??

<property?name="uniqueResourceName">?????

????<value>mysql/news</value>??

</property>??

上面的代碼為每個Datasource配置了一個唯一的名稱，名稱不允許相同，否則將會使用同一個datasource，而不會出現異常。?

另外在配置文件中定義了Atomikos的事務管理器，并在Spring的JtaTransactionManager中引用?

Java代碼??

<bean?id="atomikosTransactionManager"?class="com.atomikos.icatch.jta.UserTransactionManager"?init-method="init"?destroy-method="close">??

????????<property?name="forceShutdown"><value>true</value></property>??

????</bean>??

??????

????<bean?id="atomikosUserTransaction"?class="com.atomikos.icatch.jta.UserTransactionImp">??

????????<property?name="transactionTimeout"?value="300"/>???

????</bean>??

??

????<bean?id="springTransactionManager"?class="org.springframework.transaction.jta.JtaTransactionManager">??

????????<property?name="transactionManager"><ref?bean="atomikosTransactionManager"??/></property>??

????????<property?name="userTransaction"><ref?bean="atomikosUserTransaction"??/></property>??

????</bean>??

其它的代碼沒什么特別，和JOTM配置基本相同，JdbcTemplate，DAO，Service，事務代理等等....?

仍然使用TestXa.java，修改成引用ApplicationContext-atomikos.xml的上下文配置?

Java代碼??

protected?String[]?getConfigLocations()?{??

????//return?new?String[]?{?"classpath:ApplicationContext-jotm.xml"?};??

????return?new?String[]?{?"classpath:ApplicationContext-atomikos.xml"?};??

}??

運行test，然后查看數據庫狀態，?
然后修改方法參數使其不違反數據庫約束，再運行Test觀察數據庫 ：）。?

轉載于:https://www.cnblogs.com/chenying99/p/3183169.html

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