AOP – Spring – Hibernate Sessions for background threads / jobs

<?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:aop="http://www.springframework.org/schema/aop"
        xsi:schemaLocation="http://www.springframework.org/schema/beans
        http://www.springframework.org/schema/beans/spring-beans.xsd
        http://www.springframework.org/schema/aop
        http://www.springframework.org/schema/aop/spring-aop-2.5.xsd">
 
 
    <!-- The datasource -->
    <bean id="dataSource" class="com.mchange.v2.c3p0.ComboPooledDataSource" destroy-method="close">
			<property name="driverClass" value="org.postgresql.Driver" />
			<property name="jdbcUrl" value="jdbc:postgresql://localhost:5432/tutorials?autoReconnect=true" />
			<property name="user" value="tutorials" />
			<property name="password" value="tutorials" />
	</bean>
 
    <!-- The hibernate session factory -->
    <bean id="sessionFactory" class="org.springframework.orm.hibernate3.LocalSessionFactoryBean">
        <property name="configLocations">
            <list>
                <value>WEB-INF/conf/hibernate.cfg.xml</value>
            </list>
        </property>
        <property name="configurationClass">
            <value>org.hibernate.cfg.AnnotationConfiguration</value>
        </property>
        <property name="hibernateProperties">
            <props>
                <prop key="hibernate.dialect">org.hibernate.dialect.PostgreSQLDialect</prop>
                <prop key="hibernate.hbm2ddl.auto">update</prop>
            </props>
        </property>
        <property name="dataSource">
            <ref bean="dataSource"/>
        </property>
    </bean>
 
    <!-- The Hibernate interceptor, which takes care of opening and closing hibernate session around method calls. -->
    <bean id="hibernateInterceptor" class="org.springframework.orm.hibernate3.HibernateInterceptor">
        <property name="sessionFactory">
            <ref bean="sessionFactory"/>
        </property>
    </bean>
 
    <!-- The quartz scheduler in charge of running background jobs -->
    <bean class="org.springframework.scheduling.quartz.SchedulerFactoryBean" destroy-method="destroy">
        <property name="triggers">
            <list>
               <ref bean="testBackgroundJobTrigger"/>
            </list>
        </property>
        <property name="quartzProperties">
            <props>
                <prop key="org.quartz.threadPool.class">org.quartz.simpl.SimpleThreadPool</prop>
                <prop key="org.quartz.threadPool.threadCount">20</prop>
                <prop key="org.quartz.threadPool.threadPriority">2</prop>
            </props>
        </property>
    </bean>
 
    <!-- A trigger bean with config info on how to run the background job -->
    <bean id="testBackgroundJobTrigger" class="org.springframework.scheduling.quartz.SimpleTriggerBean">
        <property name="jobDetail" ref="testBackgroundJobDetail"/>
        <property name="startDelay" value="10000"/>
        <property name="repeatInterval" value="10000" />
    </bean>
 
    <!-- The actual background job impl that we're going to run -->
    <bean id="testBackgroundJob" class="com.raulraja.util.jobs.impl.TestBackgroundJobImpl" autowire="autodetect" />
 
    <!-- A proxy with the hibernate interceptor wired in so it can access the persistent context -->
    <bean id="testBackgroundJobProxy" class="org.springframework.aop.framework.ProxyFactoryBean">
        <property name="target">
            <ref bean="testBackgroundJob"/>
        </property>
        <property name="proxyInterfaces">
            <value>java.lang.Runnable</value>
        </property>
        <property name="interceptorNames">
            <value>hibernateInterceptor</value>
        </property>
    </bean>
 
    <!-- Detail info about the job -->
    <bean id="testBackgroundJobDetail" class="org.springframework.scheduling.quartz.MethodInvokingJobDetailFactoryBean">
        <property name="targetObject" ref="testBackgroundJobProxy"/>
        <property name="targetMethod" value="run"/>
        <property name="concurrent" value="false"/>
    </bean>
 
</beans>

package com.raulraja.util.jobs.impl;
 
import org.apache.log4j.Logger;
 
/**
 * Test job that runs on the background
 */
public class TestBackgroundJobImpl implements Runnable {
 
	private final static Logger logger = Logger.getLogger(TestBackgroundJobImpl.class);
 
	/**
	 * Do something in the background
	 */
	public void run() {
		logger.debug("doing something in the background");
	}
}