springboot中@Async注解使用备注

参考链接
https://mp.weixin.qq.com/s/SdxnKw94H6V_UBD9oe6DGQ
https://mp.weixin.qq.com/s/yvbxfwgNCVhrQUH5e3be3Q

@Configuration
@EnableAsync
public class AsyncExecutorConfig implements AsyncConfigurer {

    public Logger logger = LoggerFactory.getLogger(getClass());

    private static int corePoolSize = 5;

    private static int maxPoolSize = 10;

    private static int queueCapacity = 100;

    private static int keepAliveSeconds = 300;

    private static String threadNamePrefix = "async-job-thread-";


    @Bean("jobExecutor")
    public TaskExecutor jobExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        // 设置核心线程数
        executor.setCorePoolSize(corePoolSize);
        // 设置最大线程数
        executor.setMaxPoolSize(maxPoolSize);
        // 设置队列容量
        executor.setQueueCapacity(queueCapacity);
        // 设置线程活跃时间（秒）
        executor.setKeepAliveSeconds(keepAliveSeconds);
        // 设置默认线程名称
        executor.setThreadNamePrefix(threadNamePrefix);
        // 设置拒绝策略rejection-policy：当pool已经达到max size的时候，如何处理新任务 CALLER_RUNS：不在新线程中执行任务，而是有调用者所在的线程来执行
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        // 等待所有任务结束后再关闭线程池
        executor.setWaitForTasksToCompleteOnShutdown(true);
        return executor;
    }

    @Override
    public Executor getAsyncExecutor() {
        return jobExecutor();
    }

    @Override
    public AsyncUncaughtExceptionHandler getAsyncUncaughtExceptionHandler() {
        return handler;
    }

    private AsyncUncaughtExceptionHandler handler = (ex, method, params) -> {
        logger.error("异步任务执行异常：method:" + method.getName(), ex);
    };

}