线程池记录

线程池

场景：添加设备到数据库的同时持久化设备数据到数据库

1. 线程池配置文件

/**
 * 线程池配置文件
 *
 * @author ：Zzz
 * @date ：Created in 2022/1/5 15:04
 * @version： [1.0.0]
 */
@Configuration
public class ThreadPoolConfig {

    // 核心线程池大小
    private final int corePoolSize = 2;

    // 最大可创建的线程数
    private final int maxPoolSize = 2;

    // 队列最大长度
    private final int queueCapacity = 100;

    // 线程池维护线程所允许的空闲时间
    private final int keepAliveSeconds = 300;

    @Bean(name = "threadPoolTaskExecutor")
    public ThreadPoolTaskExecutor threadPoolTaskExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setMaxPoolSize(maxPoolSize);
        executor.setCorePoolSize(corePoolSize);
        executor.setQueueCapacity(queueCapacity);
        executor.setKeepAliveSeconds(keepAliveSeconds);
        // 线程池对拒绝任务(无线程可用)的处理策略
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        return executor;
    }
}

2. 线程池的使用

引用线程池

@Resource(name = "threadPoolTaskExecutor")
private ThreadPoolTaskExecutor executor;

执行任务

• execute方法

public interface Executor {
    void execute(Runnable command);
}

• submit方法

public interface ExecutorService extends Executor {
    
	<T> Future<T> submit(Callable<T> task);

    <T> Future<T> submit(Runnable task, T result);

    Future<?> submit(Runnable task);
}