java异步执行代码

法1
CompletableFuture.runAsync(() -> {
     // 逻辑

});

法2

import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;


@Configuration
@Slf4j
public class ExecutorConfig {

    /**
     * 核心线程数(默认线程数)
     */
    private static final int CORE_POOL_SIZE = 1;
    /**
     * 最大线程数
     */
    private static final int MAX_POOL_SIZE = 10;
    /**
     * 允许线程空闲时间(单位:默认为秒)
     */
    private static final int KEEPALIVE_TIME = 60;
    /**
     * 缓冲队列大小
     */
    private static final int QUEUE_CAPACITY = 100;

    @Bean
    public Executor asyncServiceExecutor() {
        log.info("start asyncServiceExecutor");
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        //配置核心线程数
        int coreThreads = Runtime.getRuntime().availableProcessors();
        log.info("asyncServiceExecutor coreThreads:{}", coreThreads);
        executor.setCorePoolSize(coreThreads);
        //配置最大线程数
        executor.setMaxPoolSize(coreThreads * 2);
        //配置空闲时间
        executor.setKeepAliveSeconds(KEEPALIVE_TIME);
        //配置队列大小
        executor.setQueueCapacity(QUEUE_CAPACITY);
        //配置线程前缀名
        executor.setThreadNamePrefix("async-service-");

        // 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());

        //执行初始化
        executor.initialize();
        return executor;
    }
}
@Async("asyncServiceExecutor")
public void task1() {

}

@SpringBootApplication
@EnableAsync
public class Application {
    public static void main(String[] args) {
        SpringApplication.run(Application.class, args);
    }
}
posted @ 2024-06-21 14:23  亲爱的阿道君  阅读(14)  评论(0编辑  收藏  举报