线程池

import lombok.extern.slf4j.Slf4j;
import org.springframework.context.annotation.Bean;
import org.springframework.context.annotation.Configuration;
import org.springframework.scheduling.annotation.EnableAsync;
import org.springframework.scheduling.concurrent.ThreadPoolTaskExecutor;
import java.util.concurrent.Executor;
import java.util.concurrent.ThreadPoolExecutor;
@Configuration
@EnableAsync
@Slf4j
public class ExecutorConfig {
    @Bean(name ="threadPool")
    public Executor asyncServiceExecutor() {
        log.info("================== start asyncServiceExecutor ==================");
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(4);
        executor.setMaxPoolSize(8);
        executor.setQueueCapacity(50000);
        executor.setKeepAliveSeconds(60);
        //配置线程池中的线程的名称前缀
        executor.setThreadNamePrefix("thread-synchronization-runner-%d");
        // 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;
    }
    /**
     * IO密集型线程池配置，此线程池多用于网络请求，磁盘IO。对CPU计算资源消耗娇小
     * @return
     */
    @Bean(name ="ioThreadPool")
    public Executor IOIntensiveExecutor() {
        log.info("================== start IOIntensiveExecutor ==================");
        ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
        executor.setCorePoolSize(20);
        executor.setMaxPoolSize(30);
        executor.setQueueCapacity(300000);
        executor.setKeepAliveSeconds(60);
        //配置线程池中的线程的名称前缀
        executor.setThreadNamePrefix("IO-Thread-synchronization-runner-%d");
        // 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;
    }
}