Spring线程池和自定义线程池的使用

1、下面是自定义的线程池的代码

public class SettThreadPoolExecutor {    private static final Log LOG = LogFactory.getLog(SettThreadPoolExecutor.class);    /**     * 针对核心Thread的Max比率 ，以10为基数，8表示0.8     */    private int notifyRadio = 4;    /**     * 最少线程数.<br/>     * 当池子大小小于corePoolSize就新建线程，并处理请求.     */    private int corePoolSize;    /**     * 线程池缓冲队列大小.<br/>     * 当池子大小等于corePoolSize，把请求放入workQueue中，池子里的空闲线程就去从workQueue中取任务并处理.     */    private int workQueueSize;    /**     * 最大线程数.<br/>     * 当workQueue放不下新入的任务时，新建线程入池，并处理请求，<br/>     * 如果池子大小撑到了maximumPoolSize就用RejectedExecutionHandler来做拒绝处理.     */    private int maxPoolSize;    /**     * 允许线程闲置时间,单位：秒.<br/>     * 当池子的线程数大于corePoolSize的时候，多余的线程会等待keepAliveTime长的时间，如果无请求可处理就自行销毁.     */    private long keepAliveTime;    private ThreadPoolExecutor executor = null;    public void init() {        if (workQueueSize < 1) {            workQueueSize = 1000;        }        if (this.keepAliveTime < 1) {            this.keepAliveTime = 1000;        }        int coreSize = 0;        if (this.corePoolSize < 1) {            coreSize = Runtime.getRuntime().availableProcessors();            maxPoolSize = Math.round(((float) (coreSize * notifyRadio)) / 10);            corePoolSize = coreSize / 4;            if (corePoolSize < 1) {                corePoolSize = 1;            }        }        // NOTICE: corePoolSize不能大于maxPoolSize，否则会出错        if (maxPoolSize < corePoolSize) {            maxPoolSize = corePoolSize;        }        /**         * ThreadPoolExecutor就是依靠BlockingQueue的阻塞机制来维持线程池，当池子里的线程无事可干的时候就通过workQueue.take()阻塞住         */        BlockingQueue<Runnable> notifyWorkQueue = new ArrayBlockingQueue<Runnable>(workQueueSize);        executor = new ThreadPoolExecutor(corePoolSize, maxPoolSize, keepAliveTime, TimeUnit.SECONDS, notifyWorkQueue, new ThreadPoolExecutor.CallerRunsPolicy());        LOG.info("NotifyExecutor Info : CPU = " + coreSize +                 " | corePoolSize = " + corePoolSize + " | maxPoolSize = " +                 maxPoolSize + " | workQueueSize = " + workQueueSize);    }    public void destroy() {        executor.shutdownNow();    }    public void execute(Runnable command) {        executor.execute(command);    }    public void showExecutorInfo() {        LOG.info("NotifyExecutor Info : corePoolSize = " + corePoolSize +                 " | maxPoolSize = " + maxPoolSize + " | workQueueSize = " +                 workQueueSize + " | taskCount = " + executor.getTaskCount() +                 " | activeCount = " + executor.getActiveCount() +                 " | completedTaskCount = " + executor.getCompletedTaskCount());    }    public void setNotifyRadio(int notifyRadio) {        this.notifyRadio = notifyRadio;    }    public void setWorkQueueSize(int workQueueSize) {        this.workQueueSize = workQueueSize;    }    public void setKeepAliveTime(long keepAliveTime) {        this.keepAliveTime = keepAliveTime;    }    public void setCorePoolSize(int corePoolSize) {        this.corePoolSize = corePoolSize;    }    public void setMaxPoolSize(int maxPoolSize) {        this.maxPoolSize = maxPoolSize;    }}

2、线程池在Spring-context.xml中调用

        <!-- 线程池 -->    <bean id="settThreadPoolExecutor" class="com.roncoo.pay.app.settlement.utils.SettThreadPoolExecutor" init-method="init" destroy-method="destroy">        <!-- 最小线程数 -->        <property name="corePoolSize" value="5" />        <!-- 最大线程数 -->        <property name="maxPoolSize" value="10" />        <!-- 线程池缓冲队列大小 -->        <property name="workQueueSize" value="256" />        <!-- 许线程闲置时间,单位：秒 -->        <property name="keepAliveTime" value="3" />    </bean>    <!-- 配置线程池 -->    <bean id="threadPoolTaskExecutor" class="org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor">        <!-- 线程池维护线程的最少数量 -->        <property name="corePoolSize" value="20" />        <!-- 线程池维护线程所允许的空闲时间 -->        <property name="keepAliveSeconds" value="30000" />        <!-- 线程池维护线程的最大数量 -->        <property name="maxPoolSize" value="200" />        <!-- 线程池所使用的缓冲队列 -->        <property name="queueCapacity" value="1000" />    </bean>