SpringBoot 全局线程池配置及应用小结

import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;

import java.util.concurrent.Executor;

@Configuration
public class ThreadPoolConfig {

    @Bean(name = "taskExecutor")
    public Executor taskExecutor() {
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        // 设置核心线程数
        executor.setCorePoolSize(10);
        // 设置最大线程数
        executor.setMaxPoolSize(50);
        // 设置队列容量
        executor.setQueueCapacity(100);
        // 设置线程活跃时间（秒）
        executor.setKeepAliveSeconds(60);
        // 设置默认线程名称
        executor.setThreadNamePrefix("taskExecutor-");
        // 设置拒绝策略
        executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
        // 等待所有任务结束后再关闭线程池
        executor.setWaitForTasksToCompleteOnShutdown(true);
        // 初始化线程池
        executor.initialize();
        return executor;
    }
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Async;
import org.springframework.stereotype.Service;

@Service
public class TaskService {

    @Autowired
    private TaskExecutor taskExecutor;

    @Async("taskExecutor")
    public void executeTask(int i) {
        System.out.println("Task " + i + " is running on thread: " + Thread.currentThread().getName());
    }
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.web.bind.annotation.GetMapping;
import org.springframework.web.bind.annotation.RestController;

@RestController
public class TaskController {

    @Autowired
    private TaskService taskService;

    @GetMapping("/startTasks")
    public String startTasks() {
        for (int i = 0; i < 100; i++) {
            taskService.executeTask(i);
        }
        return "Tasks started!";
    }
}

import org.springframework.beans.factory.annotation.Autowired;
import org.springframework.scheduling.annotation.Scheduled;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import org.springframework.stereotype.Component;

@Component
public class ThreadPoolMonitor {

    @Autowired
    private ThreadPoolTaskExecutor taskExecutor;

    @Scheduled(fixedRate = 5000)
    public void monitorThreadPool() {
        System.out.println("Active Threads: " + taskExecutor.getActiveCount());
        System.out.println("Pool Size: " + taskExecutor.getPoolSize());
        System.out.println("Queue Size: " + taskExecutor.getThreadPoolExecutor().getQueue().size());
    }
}