数据库分库

1、在applicationContext.xml中定义多个dataSource

一、配置第一个dataSource

1、第一个dataSource配置：

<bean id="dataSource1" class="DataSource" p:driver="${hibernate.connection.driver_class}" p:driverUrl="${hibernate.connection.url}" p:user="${hibernate.connection.username}"
p:password="${hibernate.connection.password}" p:alias="${proxool.pool_alias}" p:houseKeepingTestSql="${proxool.house-keeping-test-sql}" p:testBeforeUse="${proxool.test-before-use}"
p:maximumConnectionCount="${proxool.maximum-connection-count}" p:minimumConnectionCount="${proxool.minimum-connection-count}" p:prototypeCount="${proxool.prototype-count}"
p:trace="true" />

2、第一个sessionFactory

<bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean" p:dataSource-ref="dataSource1">
<property name="configLocations">
<list>
<value>classpath:hibernate.cfg.xml</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>
<prop key="hibernate.dialect">${hibernate.dialect}</prop>
<prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
<prop key="hibernate.format_sql">${hibernate.format_sql}</prop>
<prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>
<prop key="hibernate.generate_statistics">${hibernate.generate_statistics}</prop>
<prop key="hibernate.cache.use_second_level_cache">${hibernate.cache.use_second_level_cache}</prop>
<prop key="hibernate.cache.provider_class">${hibernate.cache.provider_class}</prop>
<prop key="hibernate.connection.autocommit">false</prop>
<prop key="hibernate.connection.release_mode">after_transaction</prop>
</props>
</property>
<property name="eventListeners">
<map>
<entry key="merge">
<bean class="org.springframework.orm.hibernate3.support.IdTransferringMergeEventListener" />
</entry>
</map>
</property>
<property name="entityInterceptor" ref="abaseEntityInterceptor" />
</bean>

3、配置template

<bean id="pageHibernateTemplate" class=" com.extend.hibernate.template.PageHibernateTemplate"><property name="sessionFactory" ref="sessionFactory"/></bean>

<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate" p:dataSource-ref="dataSource1"/>

配置第二个dataSource

1、配置第二个dataSource

<bean id="dataSource2" class="DataSource" p:driver="${hibernate.connection.driver_class}" p:driverUrl="${hibernate.connection.url.test}" p:user="${hibernate.connection.username.test}"
p:password="${hibernate.connection.password.test}" p:alias="${proxool.pool_alias.test}" p:houseKeepingTestSql="${proxool.house-keeping-test-sql}" p:testBeforeUse="${proxool.test-before-use}"
p:maximumConnectionCount="${proxool.maximum-connection-count-test}" p:minimumConnectionCount="${proxool.minimum-connection-count-test}" p:prototypeCount="${proxool.prototype-count-test}"
p:trace="true" />

2、配置第二个sessionFactory

<bean id="testSessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean" p:dataSource-ref="dataSource2">
<property name="mappingLocations">
<list>
<value>classpath*:com/test/module/*/*.hbm.xml</value>
<value>classpath*:hibernate/*.hbm.xml</value>
</list>
</property>
<property name="hibernateProperties">
<props>
<prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>
<prop key="hibernate.dialect">${hibernate.dialect}</prop>
<prop key="hibernate.show_sql">${hibernate.show_sql}</prop>
<prop key="hibernate.format_sql">${hibernate.format_sql}</prop>
<prop key="hibernate.hbm2ddl.auto">${hibernate.hbm2ddl.auto}</prop>
<prop key="hibernate.generate_statistics">${hibernate.generate_statistics}</prop>
<prop key="hibernate.cache.use_second_level_cache">${hibernate.cache.use_second_level_cache}</prop>
<prop key="hibernate.cache.provider_class">${hibernate.cache.provider_class}</prop>
<prop key="hibernate.connection.autocommit">false</prop>
<prop key="hibernate.connection.release_mode">after_transaction</prop>
<prop key="javax.persistence.validation.mode">none</prop>
</props>
</property>
<property name="eventListeners">
<map>
<entry key="merge">
<bean class="org.springframework.orm.hibernate3.support.IdTransferringMergeEventListener" />
</entry>
</map>
</property>
<property name="entityInterceptor" ref="abaseEntityInterceptor" />
</bean>

3、配置template

<bean id="testPageHibernateTemplate" class="com..extend.hibernate.template.PageHibernateTemplate">
<property name="sessionFactory" ref="testSessionFactory" />
</bean>

<bean id="testJdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate" p:dataSource-ref="dataSource2" />

二、使用数据源

使用第一个数据源：

第一个数据源的template配置的名字为：

<bean id="pageHibernateTemplate" class=" com.extend.hibernate.template.PageHibernateTemplate"><property name="sessionFactory" ref="sessionFactory"/></bean>

<bean id="jdbcTemplate" class="org.springframework.jdbc.core.JdbcTemplate" p:dataSource-ref="dataSource1"/>

所以使用的时候，如下：

<bean autowire="byName" class="com.test.test1.extend.impl.log.dao.OperationLogDaoImpl" id="operationLogDao"/>

因为是按名字注入的，OperationLogDaoImpl的父类里面有jdbcTemplate或者pageHibernateTemplate属性，并且有注入方法，所以按照上面这种做法是可以的。

使用第二个数据源：

<bean class="com.test.ressync.dao.hahaDataJdbcDaoImpl" id="hahaDataJdbcDao" p:jdbcTemplate-ref="testJdbcTemplate" p:dataSource-ref="dataSource2"/>