com.jchanghong.core.thread.RejectPolicy Maven / Gradle / Ivy
package com.jchanghong.core.thread;
import java.util.concurrent.RejectedExecutionHandler;
import java.util.concurrent.ThreadPoolExecutor;
/**
* 线程拒绝策略枚举
*
*
* 如果设置了maxSize, 当总线程数达到上限, 会调用RejectedExecutionHandler进行处理，此枚举为JDK预定义的几种策略枚举表示
*
* @author looly
* @since 4.1.13
*/
public enum RejectPolicy {
/** 处理程序遭到拒绝将抛出RejectedExecutionException */
ABORT(new ThreadPoolExecutor.AbortPolicy()),
/** 放弃当前任务 */
DISCARD(new ThreadPoolExecutor.DiscardPolicy()),
/** 如果执行程序尚未关闭，则位于工作队列头部的任务将被删除，然后重试执行程序（如果再次失败，则重复此过程） */
DISCARD_OLDEST(new ThreadPoolExecutor.DiscardOldestPolicy()),
/** 由主线程来直接执行 */
CALLER_RUNS(new ThreadPoolExecutor.CallerRunsPolicy());
private final RejectedExecutionHandler value;
RejectPolicy(RejectedExecutionHandler handler) {
this.value = handler;
}
/**
* 获取RejectedExecutionHandler枚举值
*
* @return RejectedExecutionHandler
*/
public RejectedExecutionHandler getValue() {
return this.value;
}
}