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春季具有多个事务管理器的多个数据源更新

java transactions spring datasource
2022-09-04 22:07:50

我在 Junit 应用程序上下文文件中定义了三个 （JDBC）。其中两个需要进行交易管理;使用这两个数据源时，我不必链接任何方法（它们彼此完全独立）。DataSource

当我使用单个事务管理器时，我没有遇到问题，即使正在使用中，但没有在相应的方法中进行管理。尽管如此，在需要管理来自仅使用的各种DAO类的方法时，我添加了第二个事务-- .上下文文件包含以下内容：dataSource2dataSource3dataSource3txManager2

<context:component-scan base-package="my.pkg" />

<bean id="dataSource1"
    class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="oracle.jdbc.OracleDriver" />
    <property name="url" value="jdbc:oracle:thin:@host1:1521:dbsid1" />
<property name="username" value="username1" />
<property name="password" value="password1" />
</bean>

<bean id="dataSource2"
    class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="oracle.jdbc.OracleDriver" />
    <property name="url" value="jdbc:oracle:thin:@host2:1521:dbsid2" />
<property name="username" value="username2" />
<property name="password" value="password2" />
</bean>

<bean id="dataSource3"
    class="org.springframework.jdbc.datasource.DriverManagerDataSource">
    <property name="driverClassName" value="oracle.jdbc.OracleDriver" />
    <property name="url" value="jdbc:oracle:thin:@host3:1521:dbsid3" />
<property name="username" value="username3" />
<property name="password" value="password3" />
</bean>

<tx:annotation-driven/>

<bean id="txManager1" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <qualifier value="txManager1"/>
<property name="dataSource2" ref="dataSource2"/>
</bean>

<bean id="txManager2" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <qualifier value="txManager2"/>
<property name="dataSource3" ref="dataSource3"/>
</bean>

由于正在定义多个事务管理器，因此我用它们自己的值对其进行了限定。如您所见，正在使用 setter 方法进行注入：dataSource3

package my.pkg;

@Component
public class MyDAO {

    private DataSource dataSource3;

    // Read only from datasource
    @Autowired
    @Qualifier("dataSource")
    public void setDataSource(DataSource ds) {
        template = new NamedParameterJdbcTemplate(ds);
    }

    // Performs reads/updates/inserts from datasource2
    @Autowired
    @Qualifier("dataSource2")
    public void setDataSource2(DataSource ds) {
        iTemplate = new NamedParameterJdbcTemplate(ds);
    }

    // Performs reads/updates/inserts from datasource3
    @Autowired
    @Qualifier("dataSource3")
    public void setDataSource3(DataSource ds) {
        dataSource3 = ds;
        uTemplate = new NamedParameterJdbcTemplate(ds);
    }

    @Transactional("txManager1")    
    public String insertProcs() { }

    @Transactional("txManager2")    
    public String updateProcs() { }
}

但是，在运行 Junit 单元测试时，我得到以下结果：

java.lang.IllegalStateException: Failed to load ApplicationContext
    at org.springframework.test.context.TestContext.getApplicationContext(TestContext.java:308)
    at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.injectDependencies(DependencyInjectionTestExecutionListener.java:109)
    at org.springframework.test.context.support.DependencyInjectionTestExecutionListener.prepareTestInstance(DependencyInjectionTestExecutionListener.java:75)
    at org.springframework.test.context.TestContextManager.prepareTestInstance(TestContextManager.java:321)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.createTest(SpringJUnit4ClassRunner.java:211)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner$1.runReflectiveCall(SpringJUnit4ClassRunner.java:287)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:15)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.methodBlock(SpringJUnit4ClassRunner.java:289)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.runChild(SpringJUnit4ClassRunner.java:231)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:50)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:193)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:52)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:191)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:42)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:184)
    at org.springframework.test.context.junit4.statements.RunBeforeTestClassCallbacks.evaluate(RunBeforeTestClassCallbacks.java:61)
    at org.springframework.test.context.junit4.statements.RunAfterTestClassCallbacks.evaluate(RunAfterTestClassCallbacks.java:70)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:236)
    at org.springframework.test.context.junit4.SpringJUnit4ClassRunner.run(SpringJUnit4ClassRunner.java:174)
    at org.eclipse.jdt.internal.junit4.runner.JUnit4TestReference.run(JUnit4TestReference.java:49)
    at org.eclipse.jdt.internal.junit.runner.TestExecution.run(TestExecution.java:38)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:467)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.runTests(RemoteTestRunner.java:683)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.run(RemoteTestRunner.java:390)
    at org.eclipse.jdt.internal.junit.runner.RemoteTestRunner.main(RemoteTestRunner.java:197)
Caused by: org.springframework.beans.factory.BeanCreationException: Error creating bean with name 'txManager2' defined in class path resource [test-context.xml]: 

Error setting property values; nested exception is org.springframework.beans.NotWritablePropertyException: Invalid property 'dataSource3' of bean class 

[org.springframework.jdbc.datasource.DataSourceTransactionManager]: Bean property 'dataSource3' is not writable or has an invalid setter method. Does the parameter 

type of the setter match the return type of the getter?
at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1363)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.populateBean(AbstractAutowireCapableBeanFactory.java:1085)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.doCreateBean(AbstractAutowireCapableBeanFactory.java:516)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.createBean(AbstractAutowireCapableBeanFactory.java:455)
        at org.springframework.beans.factory.support.AbstractBeanFactory$1.getObject(AbstractBeanFactory.java:293)
        at org.springframework.beans.factory.support.DefaultSingletonBeanRegistry.getSingleton(DefaultSingletonBeanRegistry.java:222)
        at org.springframework.beans.factory.support.AbstractBeanFactory.doGetBean(AbstractBeanFactory.java:290)
        at org.springframework.beans.factory.support.AbstractBeanFactory.getBean(AbstractBeanFactory.java:192)
        at org.springframework.beans.factory.support.DefaultListableBeanFactory.preInstantiateSingletons(DefaultListableBeanFactory.java:585)
        at org.springframework.context.support.AbstractApplicationContext.finishBeanFactoryInitialization(AbstractApplicationContext.java:895)
        at org.springframework.context.support.AbstractApplicationContext.refresh(AbstractApplicationContext.java:425)
        at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:84)
        at org.springframework.test.context.support.AbstractGenericContextLoader.loadContext(AbstractGenericContextLoader.java:1)
        at org.springframework.test.context.TestContext.loadApplicationContext(TestContext.java:280)
        at org.springframework.test.context.TestContext.getApplicationContext(TestContext.java:304)
        ... 24 more
    Caused by: org.springframework.beans.NotWritablePropertyException: Invalid property 'dataSource3' of bean class 

    [org.springframework.jdbc.datasource.DataSourceTransactionManager]: Bean property 'dataSource3' is not writable or has an invalid setter method. Does the parameter 

    type of the setter match the return type of the getter?
        at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:1052)
        at org.springframework.beans.BeanWrapperImpl.setPropertyValue(BeanWrapperImpl.java:921)
        at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:76)
        at org.springframework.beans.AbstractPropertyAccessor.setPropertyValues(AbstractPropertyAccessor.java:58)
        at org.springframework.beans.factory.support.AbstractAutowireCapableBeanFactory.applyPropertyValues(AbstractAutowireCapableBeanFactory.java:1360)

任何想法问题的根源在哪里？

更新

根据接受的答案，进行了以下更改以获取预期的功能：

<tx:annotation-driven transaction-manager="txManager1"/>

<bean id="txManager1" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <qualifier value="txManager1"/>
    <property name="dataSource" ref="dataSource2"/>
</bean>

<bean id="txManager2" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
    <qualifier value="txManager2"/>
    <property name="dataSource" ref="dataSource3"/>
</bean>

@Qualifier("dataSource")应该已经纠正了（我的拼写错误）：

    // Read only from datasource
    @Autowired
    @Qualifier("dataSource1")
    public void setDataSource1(DataSource ds) {
        template = new NamedParameterJdbcTemplate(ds);
    }

答案 1

您的配置存在一些问题：

<property name="dataSource2" ref="dataSource2"/>
<property name="dataSource3" ref="dataSource3"/>

Bean 名称不同，但属性名称不同。您应将其更改为：

<property name="dataSource" ref="dataSource2"/>
<property name="dataSource" ref="dataSource3"/>

例如：分别在 txManager1 和 txManager2 bean 的 setter 属性中。

第二：并且是错误的，因为你正在限定TX管理器的bean，而不是数据源bean。@Qualifier("dataSource2")@Qualifier("dataSource3")

您也可以改用 和 或限定数据源 Bean。@Resource("dataSource2")@Resource("dataSource3")

第三：。请注意，它既不是用限定符也不是用豆子的名字来抱怨（注意：它是dataSource1@Qualifier("dataSource"))

最后一件事，您已经定义了 .它需要一个事务管理器，其 Bean 名称是 transactionManager。你也没能给它的豆子定义，所以这也会失败。tx:annotation-driven


答案 2

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