SchedulerLock分布式定时任务锁

1.pom中引入依赖，这里使用redis作为锁

        
            net.javacrumbs.shedlock
            shedlock-spring
            4.12.0
        
        
            net.javacrumbs.shedlock
            shedlock-provider-redis-spring
            4.12.0
        

2.yml配置redis连接

spring:
 redis:
    host: localhost
    port: 6379
    database: 0
    taskrelease: taskrelease

3.配置redis序列化

@Configuration
public class RedisConfig {
    @Bean
    public RedisTemplate redisTemplate(RedisConnectionFactory redisConnectionFactory) {
        RedisTemplate redisTemplate = new RedisTemplate();
        redisTemplate.setConnectionFactory(redisConnectionFactory);
        // 使用Jackson2JsonRedisSerialize 替换默认序列化
        Jackson2JsonRedisSerializer jackson2JsonRedisSerializer = new Jackson2JsonRedisSerializer(Object.class);
        ObjectMapper objectMapper = new ObjectMapper();
        objectMapper.setVisibility(PropertyAccessor.ALL, JsonAutoDetect.Visibility.ANY);
        jackson2JsonRedisSerializer.setObjectMapper(objectMapper);
        // 设置value的序列化规则和 key的序列化规则
        redisTemplate.setValueSerializer(jackson2JsonRedisSerializer);
        redisTemplate.setKeySerializer(new StringRedisSerializer());
        redisTemplate.afterPropertiesSet();
        return redisTemplate;
    }
}

4.线程池和分布式锁配置 

import lombok.extern.slf4j.Slf4j;
import net.javacrumbs.shedlock.core.LockProvider;
import net.javacrumbs.shedlock.provider.redis.spring.RedisLockProvider;
import net.javacrumbs.shedlock.spring.annotation.EnableSchedulerLock;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.data.redis.connection.RedisConnectionFactory;
import org.springframework.scheduling.annotation.SchedulingConfigurer;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import org.springframework.scheduling.concurrent.ThreadPoolTaskScheduler;
import org.springframework.scheduling.config.ScheduledTaskRegistrar;
import javax.annotation.Resource;
import java.util.concurrent.ExecutorService;
import java.util.concurrent.ScheduledThreadPoolExecutor;
import java.util.concurrent.ThreadPoolExecutor;
@EnableSchedulerLock(defaultLockAtMostFor = "PT30M")
@Slf4j
@Configuration
public class ScheduleConfig implements SchedulingConfigurer {
    @Resource
    ExecutorService scheduledThreadPoolExecutor;
    /**
     *
     */
    @Bean
    public ThreadPoolTaskExecutor threadPoolTaskExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        //最大线程数
        executor.setMaxPoolSize(8);
        //核心线程数
        executor.setCorePoolSize(8);
        //任务队列的大小
        executor.setQueueCapacity(100);
        //线程前缀名
        executor.setThreadNamePrefix("common-");
        //线程存活时间
        executor.setKeepAliveSeconds(30);
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.AbortPolicy());
        //线程初始化
        executor.initialize();
        return executor;
    }
    /**
     * 动态调度任务线程池
     */
    @Bean
    public ThreadPoolTaskScheduler threadPoolTaskScheduler() {
        ThreadPoolTaskScheduler threadPoolTaskScheduler = new ThreadPoolTaskScheduler();
        // 线程池大学
        threadPoolTaskScheduler.setPoolSize(15);
        // 线程名称
        threadPoolTaskScheduler.setThreadNamePrefix("taskScheduler-");
        // 等待时长
        threadPoolTaskScheduler.setAwaitTerminationSeconds(60);
        // 调度器shutdown被调用时等待当前被调度的任务完成
        threadPoolTaskScheduler.setWaitForTasksToCompleteOnShutdown(true);
        return threadPoolTaskScheduler;
    }
    /**
     * Schedule定时任务指定线程池
     * Spring注解
     */
    @Bean(name = "scheduledThreadPoolExecutor")
    public ScheduledThreadPoolExecutor scheduledThreadPoolExecutor() {
        return new ScheduledThreadPoolExecutor(15);
    }
    @Override
    public void configureTasks(ScheduledTaskRegistrar taskRegistrar) {
        //显式为Scheduler指定线程池
        taskRegistrar.setScheduler(scheduledThreadPoolExecutor);
    }
    /**
     * 分布式锁
     * Schedule定时任务， Spring注解
     */
    @Bean
    public LockProvider lockProvider(RedisConnectionFactory connectionFactory) {
        return new RedisLockProvider(connectionFactory, System.getProperty("spring.profiles.active"));
    }
}

5.执行任务方法

    @Scheduled(cron = "0 0 23 * * ?")
    @SchedulerLock(name = "synchronizeAddDept", lockAtLeastFor = "PT15S")
    public void synchronizeAddDept() {
        StopWatch watch = new StopWatch();
        watch.start();
        log.info("====================> 同步部门数据开始, {}", LocalDateTime.now());
        watch.stop();
        log.info("====================> 同步部门数据结束, {}, 用时 {}", LocalDateTime.now(), 
        watch.getTotalTimeSeconds());
}