package com.genersoft.iot.vmp.conf;
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import org.apache.commons.lang3.concurrent.BasicThreadFactory;
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import org.springframework.context.annotation.Configuration;
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import org.springframework.scheduling.annotation.SchedulingConfigurer;
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import org.springframework.scheduling.config.ScheduledTaskRegistrar;
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import java.util.concurrent.ScheduledThreadPoolExecutor;
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import java.util.concurrent.ThreadPoolExecutor;
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/**
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* "@Scheduled"是Spring框架提供的一种定时任务执行机制，默认情况下它是单线程的，在同时执行多个定时任务时可能会出现阻塞和性能问题。
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* 为了解决这种单线程瓶颈问题，可以将定时任务的执行机制改为支持多线程
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*/
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@Configuration
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public class ScheduleConfig implements SchedulingConfigurer {
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public static final int cpuNum = Runtime.getRuntime().availableProcessors();
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private static final int corePoolSize = cpuNum;
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private static final String threadNamePrefix = "scheduled-task-pool-%d";
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@Override
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public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
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taskRegistrar.setScheduler(new ScheduledThreadPoolExecutor(corePoolSize,
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new BasicThreadFactory.Builder().namingPattern(threadNamePrefix).daemon(true).build(),
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new ThreadPoolExecutor.CallerRunsPolicy()));
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}
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}
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