<?xml version="1.0" encoding="UTF-8"?>
<beans xmlns="http://www.springframework.org/schema/beans"
	xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:context="http://www.springframework.org/schema/context"
	xmlns:tx="http://www.springframework.org/schema/tx"
	xsi:schemaLocation="http://www.springframework.org/schema/beans http://www.springframework.org/schema/beans/spring-beans-4.2.xsd
  	 http://www.springframework.org/schema/context http://www.springframework.org/schema/context/spring-context-4.2.xsd
 	 http://www.springframework.org/schema/tx http://www.springframework.org/schema/tx/spring-tx-4.2.xsd">

	<context:component-scan base-package="com.ischoolbar.programmer">
		<context:include-filter type="annotation"
			expression="org.springframework.stereotype.Component" />
		<context:include-filter type="annotation"
			expression="org.springframework.stereotype.Repository" />
		<context:include-filter type="annotation"
			expression="org.springframework.stereotype.Service" />
	</context:component-scan>

	<!-- 加载配数据源配置文件 db.properties -->
	<context:property-placeholder location="classpath:config/db.properties" />

	<!-- 配置 C3P0 数据源 -->

	<bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
		<property name="driverClass" value="${datasource.connection.driver_class}"/>
		<property name="jdbcUrl" value="${datasource.connection.url}"/>
		<property name="user" value="${datasource.connection.username}"/>
		<property name="password" value="${datasource.connection.password}"/>
		<property name="minPoolSize" value="${datasource.connection.minPoolSize}"/>
		<!--连接池中保留的最大连接数。Default: 15 -->
		<property name="maxPoolSize" value="${datasource.connection.maxPoolSize}"/>
		<!--最大空闲时间,60秒内未使用则连接被丢弃。若为0则永不丢弃。Default: 0 -->
		<property name="maxIdleTime" value="${datasource.connection.maxIdleTime}"/>
		<!--当连接池中的连接耗尽的时候c3p0一次同时获取的连接数。Default: 3 -->
		<property name="acquireIncrement" value="${datasource.connection.acquireIncrement}"/>
		<!--JDBC的标准参数，用以控制数据源内加载的PreparedStatements数量。但由于预缓存的statements 属于单个connection而不是整个连接池。所以设置这个参数需要考虑到多方面的因素。
            如果maxStatements与maxStatementsPerConnection均为0，则缓存被关闭。Default: 0 -->
		<property name="maxStatements" value="${datasource.connection.maxStatements}"/>
		<!--maxStatementsPerConnection定义了连接池内单个连接所拥有的最大缓存statements数。Default: 0 -->
		<property name="maxStatementsPerConnection"
				  value="${datasource.connection.maxStatementsPerConnection}"/>
		<!--初始化时获取三个连接，取值应在minPoolSize与maxPoolSize之间。Default: 3 -->
		<property name="initialPoolSize" value="${datasource.connection.initialPoolSize}"/>
		<!--每60秒检查所有连接池中的空闲连接。Default: 0 -->
		<property name="idleConnectionTestPeriod"
				  value="${datasource.connection.idleConnectionTestPeriod}"/>
		<!--定义在从数据库获取新连接失败后重复尝试的次数。Default: 30 -->
		<property name="acquireRetryAttempts"
				  value="${datasource.connection.acquireRetryAttempts}"/>
		<!--获取连接失败将会引起所有等待连接池来获取连接的线程抛出异常。但是数据源仍有效 保留，并在下次调用getConnection()的时候继续尝试获取连接。如果设为true，那么在尝试
            获取连接失败后该数据源将申明已断开并永久关闭。Default: false -->
		<property name="breakAfterAcquireFailure"
				  value="${datasource.connection.breakAfterAcquireFailure}"/>
		<!--因性能消耗大请只在需要的时候使用它。如果设为true那么在每个connection提交的 时候都将校验其有效性。建议使用idleConnectionTestPeriod或automaticTestTable
            等方法来提升连接测试的性能。Default: false -->
		<property name="testConnectionOnCheckout"
				  value="${datasource.connection.testConnectionOnCheckout}"/>
		<property name="checkoutTimeout" value="${datasource.connection.checkoutTimeout}"/>
		<property name="testConnectionOnCheckin"
				  value="${datasource.connection.testConnectionOnCheckin}"/>
		<property name="automaticTestTable" value="${datasource.connection.automaticTestTable}"/>
		<property name="acquireRetryDelay" value="${datasource.connection.acquireRetryDelay}"/>
		<!--自动超时回收Connection-->
		<property name="unreturnedConnectionTimeout" value="${datasource.connection.unreturnedConnectionTimeout}"/>
		<!--超时自动断开-->
		<property name="maxIdleTimeExcessConnections" value="${datasource.connection.maxIdleTimeExcessConnections}"/>
		<property name="maxConnectionAge" value="${datasource.connection.maxConnectionAge}"/>

	</bean>

	<!-- 事务管理器 （JDBC） -->
	<bean id="transactionManager"
		class="org.springframework.jdbc.datasource.DataSourceTransactionManager">
		<property name="dataSource" ref="dataSource"></property>
	</bean>

	<!-- 启动声明式事务驱动 -->
	<tx:annotation-driven transaction-manager="transactionManager" />


	<!-- spring 通过 sqlSessionFactoryBean 获取 sqlSessionFactory 工厂类 -->
	<bean id="sqlSessionFactory" class="org.mybatis.spring.SqlSessionFactoryBean">
		<property name="dataSource" ref="dataSource"></property>
		<!-- 扫描 po 包，使用别名 -->
		<property name="typeAliasesPackage" value="com.ischoolbar.programmer.entity"></property>
		<!-- 扫描映射文件 -->
		<property name="mapperLocations">
			<array>
				<value>classpath:config/mybatis/mapper/admin/*.xml</value>
				<value>classpath:config/mybatis/mapper/home/*.xml</value>
				<value>classpath:config/mybatis/mapper/common/*.xml</value>
			</array>
		</property>
	</bean>

	<!-- 配置扫描 dao 包，动态实现 dao 接口，注入到 spring 容器中 -->
	<bean class="org.mybatis.spring.mapper.MapperScannerConfigurer">
		<property name="basePackage" value="com.ischoolbar.programmer.dao" />
		<!-- 注意使用 sqlSessionFactoryBeanName 避免出现spring 扫描组件失效问题 -->
		<property name="sqlSessionFactoryBeanName" value="sqlSessionFactory" />
	</bean>

	<bean id="gson" class="com.google.gson.Gson" scope="prototype"></bean>

</beans>