我有一个默认数据库,有时我必须在另一个数据库中进行选择。
我在这里搜索了许多关于此的博客和问题,但无法使其发挥作用。
尝试了http://blog.springsource.org/2007/01/23/dynamic-datasource-routing/方式。没有什么。
RouterDataSource 类的代码:
public class RouterDataSource extends AbstractRoutingDataSource {
@Override
protected DataSourceEnum determineCurrentLookupKey() {
return DataSourceContextHolder.getTargetDataSource();
}
}
DataSourceContextHolder 类的代码:
public class DataSourceContextHolder {
private static final ThreadLocal<DataSourceEnum> contextHolder = new ThreadLocal<DataSourceEnum>();
public static void setTargetDataSource(DataSourceEnum targetDataSource) {
Assert.notNull(targetDataSource, "Target data source cannot be null");
contextHolder.set(targetDataSource);
}
public static DataSourceEnum getTargetDataSource() {
if (contextHolder.get() != null)
return (DataSourceEnum) contextHolder.get();
else
return DataSourceEnum.DB1;
}
public static void resetDefaultDataSource() {
contextHolder.remove();
}
}
调用更改数据库的方法的代码:
@Override
public CodeHD getCategoryByCode(String code) throws BusinessException {
DataSourceContextHolder.setTargetDataSource(DataSourceEnum.DATABASE2);
return (CodeHD) persistency.getObject(GETOBJECT_BY_CODE, code);
}
DatasourceEnum 类的代码:
public enum DataSourceEnum {
DB1,
DB2;
}
最后是我的 applicationContext.xml 上的配置:
<bean id="parentDataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" abstract="true">
<property name="driverClass" value="oracle.jdbc.pool.OracleDataSource" />
<property name="acquireIncrement" value="10" />
<property name="idleConnectionTestPeriod" value="60" />
<property name="maxStatements" value="50" />
<property name="minPoolSize" value="5" />
<property name="maxPoolSize" value="15" />
</bean>
<bean id="database1DS" parent="parentDataSource">
<property name="jdbcUrl" value="jdbc:oracle:thin:@database1:1521:xe" />
<property name="user" value="user" />
<property name="password" value="password" />
</bean>
<bean id="database2DS" parent="parentDataSource">
<property name="jdbcUrl" value="jdbc:oracle:thin:@database2:1521:xe" />
<property name="user" value="user" />
<property name="password" value="password" />
</bean>
<bean id="transactionManager" class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
<property name="dataSource" ref="dataSource"/>
</bean>
<bean id="dataSource" class="package.RouterDataSource">
<property name="defaultTargetDataSource" ref="database1DS"/>
<property name="targetDataSources">
<map key-type="package.DataSourceEnum">
<entry key="DB1" value-ref="database1DS"/>
<entry key="DB2" value-ref="database2DS"/>
</map>
</property>
</bean>
问题是当我将它设置为 DB2 时它不会改变。
谁能帮我?