一:线程池定义
public class ThreadPoolConfig {
/**
* 核心线程数(默认线程数)
*/
private static final int corePoolSize = 100;
/**
* 最大线程数
*/
private static final int maxPoolSize = 500;
/**
* 允许线程空闲时间(单位:默认为秒)
*/
private static final int keepAliveTime = 10;
/**
* 缓冲队列大小
*/
private static final int queueCapacity = 200;
/**
* 线程池名前缀
*/
private static final String threadNamePrefix = "Async-Service-";
/**
* 默认情况下,在创建了线程池后,线程池中的线程数为0,当有任务来之后,就会创建一个线程去执行任务,
* 当线程池中的线程数目达到corePoolSize后,就会把到达的任务放到缓存队列当中;
* 当队列满了,就继续创建线程,当线程数量大于等于maxPoolSize后,开始使用拒绝策略拒绝
*/
@Bean("asyncExecutor")
public ThreadPoolTaskExecutor myExecutor() {
ThreadPoolTaskExecutor executor = new ThreadPoolTaskExecutor();
executor.setCorePoolSize(corePoolSize);
executor.setMaxPoolSize(maxPoolSize);
executor.setQueueCapacity(queueCapacity);
executor.setKeepAliveSeconds(keepAliveTime);
executor.setThreadNamePrefix(threadNamePrefix);
// 线程池对拒绝任务的处理策略
// CallerRunsPolicy:由调用线程(提交任务的线程)处理该任务
executor.setRejectedExecutionHandler(new ThreadPoolExecutor.CallerRunsPolicy());
// 初始化
executor.initialize();
log.info("springboot 线程池初始化完毕");
return executor;
}
}
二、使用:
@Async("asyncExecutor")
public void asyncThreadPool(){
try {
log.info("异步处理数据开始:订单号:{}", orderNo);
//业务逻辑处理
} catch (Exception e) {
log.error("异步处理任务异常:", e);
}
}