Ali Druid 连接池与监控 配置

Druid是基于1.0.7实际配置，spring + springmvc + mybatis + druid。
Maven的引用：

	<!-- druid -->
	<dependency>
		<groupId>com.alibaba</groupId>
		<artifactId>druid</artifactId>
		<version>1.0.7</version>
	</dependency>

web.xml

	<!-- Druid stat -->
	<servlet>
		<servlet-name>DruidStatView</servlet-name>
		<servlet-class>com.alibaba.druid.support.http.StatViewServlet</servlet-class>
	</servlet>
	<servlet-mapping>
		<servlet-name>DruidStatView</servlet-name>
		<url-pattern>/druid/*</url-pattern>
	</servlet-mapping>
	
	<!-- Druid WEB 监控 -->
	<filter>
		<filter-name>DruidWebStatFilter</filter-name>
		<filter-class>com.alibaba.druid.support.http.WebStatFilter</filter-class>
		<init-param>
			<param-name>exclusions</param-name>
			<param-value>*.js,*.gif,*.jpg,*.png,*.css,*.ico,/druid/*</param-value>
		</init-param>
	</filter>
	<filter-mapping>
		<filter-name>DruidWebStatFilter</filter-name>
		<url-pattern>/*</url-pattern>
	</filter-mapping>

访问监控页面地址：
http://localhost:8080/projectPath/druid/index.html

applicationContext.xml

	<!-- Druid spring 监控 -->
	<bean id="druid-stat-interceptor_bus"
		class="com.alibaba.druid.support.spring.stat.DruidStatInterceptor">
	</bean>
	<bean id="druid-stat-pointcut_bus" scope="prototype"
		class="org.springframework.aop.support.JdkRegexpMethodPointcut">
		<property name="patterns">
			<list>
				<!-- No interface -->
				<value>com.sinowel.ucs.bus..*Service.*(..)</value>
			</list>
		</property>
	</bean>
	<aop:config proxy-target-class="true">
		<aop:advisor advice-ref="druid-stat-interceptor_bus"
			pointcut-ref="druid-stat-pointcut_bus" />
	</aop:config>

	<!-- Druid dataSource -->
	<bean id="dataSource_bus_MO" class="com.alibaba.druid.pool.DruidDataSource"
			init-method="init" destroy-method="close">
			
	<!-- dbcp dataSource -->
	<!-- <bean id="dataSource_bus_MO" class="org.apache.commons.dbcp.BasicDataSource"
		destroy-method="close"> -->
		
		<property name="driverClassName" value="${mo.db.driverClassName}"/>
		<!-- 基本属性 url、user、password -->
		<property name="url" value="${mo.db.url}" />
		<property name="username" value="${mo.db.username}" />
		<property name="password" value="${mo.db.password}" />
	
		<!-- 配置初始化大小、最小、最大 -->
		<property name="initialSize" value="${initialSize}" />
		<property name="minIdle" value="${minIdle}" />
		<property name="maxActive" value="${maxActive}" />
	
		<!-- 配置获取连接等待超时的时间 -->
		<property name="maxWait" value="60000" />
	
		<!-- 配置间隔多久才进行一次检测，检测需要关闭的空闲连接，单位是毫秒 -->
		<property name="timeBetweenEvictionRunsMillis" value="60000" />
	
		<!-- 配置一个连接在池中最小生存的时间，单位是毫秒 -->
		<property name="minEvictableIdleTimeMillis" value="300000" />
	
		<property name="validationQuery" value="SELECT 'x'" />
		<property name="testWhileIdle" value="true" />
		<property name="testOnBorrow" value="false" />
		<property name="testOnReturn" value="false" />
	
		<!-- 打开removeAbandoned功能 -->
		<property name="removeAbandoned" value="${removeAbandoned}" />
		<!-- 1800秒，也就是30分钟 -->
		<property name="removeAbandonedTimeout" value="${removeAbandonedTimeout}" />
		<!-- 关闭abanded连接时输出错误日志 -->
		<property name="logAbandoned" value="${logAbandoned}" />

		<!-- 打开PSCache，并且指定每个连接上PSCache的大小 -->
		<property name="poolPreparedStatements" value="true" />
		
		<!-- dbcp 配置 Start -->
		<!-- <property name="maxOpenPreparedStatements" value="${maxPoolPreparedStatementSize}" /> -->
		<!-- dbcp 配置 End -->
		
		<!-- druid 配置 Start -->
		<property name="maxPoolPreparedStatementPerConnectionSize" value="${maxPoolPreparedStatementSize}" />
		<!-- 配置监控统计拦截的filters -->
		<property name="filters" value="stat,wall" />
		<!-- druid 配置 End -->
	</bean>

注：
1. stat,wall为连接池和sql防火墙配置
2. druid与dbcp配置相似，可直接切换
3. {xxx}利用spring的webAppRoot在配置文件jdbc.properties

{xxx}的使用：
applicationContext.xml

<context:property-placeholder location="classpath:META-INF/jdbc.properties" ignore-unresolvable="true"/>

注：ignore-unresolvable属性为true，表示可以重复引用(主要用于多工程)，同一工程也可用“,”分隔。

web.xml

	<context-param>
		<param-name>webAppRootKey</param-name>
		<param-value>webapp.root</param-value>
	</context-param>

注：webapp.root为默认值，最好保持唯一性(多工程时)

SQL合并监控配置：

	<!-- dataSource filters replace stat -->
	<property name="filters" value="mergeStat,wall" />

引用

langmnm:
http://langmnm.iteye.com/admin/blogs/2112099