TaskFactory单例模式利用xml

/** 
 * 
 * Copyright (c) 1995-2009 Wonders Information Co.,Ltd. 
 * 1518 Lianhang Rd,Shanghai 201112.P.R.C.
 * All Rights Reserved.
 * 
 * This software is the confidential and proprietary information of Wonders Group.
 * (Social Security Department). You shall not disclose such
 * Confidential Information and shall use it only in accordance with 
 * the terms of the license agreement you entered into with Wonders Group. 
 *
 * Distributable under GNU LGPL license by gnu.org
 */

package com.yundaex.common.parent.threadpool;

import org.springframework.beans.BeansException;
import org.springframework.context.ApplicationContext;
import org.springframework.context.ApplicationContextAware;
import org.springframework.stereotype.Repository;

/**
 * <p>
 * Title: Adage_[子系统统名]_[模块名]
 * </p>
 * <p>
 * Description: 并发任务工厂,用于动态获取并发任务实例
 * 注意：主要用于事务包装的并发任务，在用SPRING包装任务的事务时，需要注意，任务bean和任务代理bean必须均为Prototype类型(singleton为false)
 * </p>
 * 
 * @author Jessy
 * @version $Revision$ 2010-8-4
 * @author (lastest modification by $Author$)
 * @since 1.0
 */
@Repository("taskFactory")
public final class TaskFactory implements ApplicationContextAware {
    private ApplicationContext applicationContext;

    private static TaskFactory instance;

    private TaskFactory() {

    }

    /**
     * <p>
     * Discription:获取任务工厂实例
     * </p>
     * 
     * @return
     */
    public static TaskFactory getInstance() {
        if (instance == null) {
            instance = new TaskFactory();
        }
        return instance;
    }

    /**
     * <p>
     * Discription:创建并发任务
     * </p>
     * 
     * @param <T> 泛型
     * @param type 任务类型
     * @param taskClass 任务CLASS
     * @return
     */
    public <T extends Task> T createTask(String type, Class<T> taskClass) {
        return taskClass.cast(applicationContext.getBean(type));
    }

    /**
     * {@inheritDoc}
     * 
     * @see org.springframework.context.ApplicationContextAware#
     *      setApplicationContext(org.springframework.context.ApplicationContext)
     */
    public void setApplicationContext(ApplicationContext applicationContext) throws BeansException {
        this.applicationContext = applicationContext;

    }
}

applicationContext-common-threadpool.xml

<?xml version="1.0" encoding="UTF-8"?>
<!DOCTYPE beans PUBLIC "-//SPRING//DTD BEAN//EN"
"http://www.springframework.org/dtd/spring-beans.dtd">
<beans>
    <description></description>
    <bean id="simpleThreadPool" class="com.yundaex.common.parent.threadpool.runtime.SimpleThreadPool"
        abstract="true">
    </bean>
    <bean id="dynamicThreadPool" class="com.yundaex.common.parent.threadpool.runtime.DynamicThreadPool"
        abstract="true">
        <!--<property name="maxSize" value="${your.module.maxSize}"></property>
        <property name="minSize" value="${your.module.minSize}"></property>
        <property name="checkPeriod" value="${your.module.checkPeriod}"></property>
        <property name="sparePeriod" value="${your.module.sparePeriod}"></property>-->
    </bean>
    
    <bean id="taskFactory" class="com.yundaex.common.parent.threadpool.TaskFactory"
        factory-method="getInstance">
    </bean>
</beans>