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86183

2022-09-09 0d999e33085c0a25c5525242748f6aa62a401159

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package com.xxl.job.admin.core.route.strategy;
 
import com.xxl.job.admin.core.route.ExecutorRouter;
import com.xxl.job.core.biz.model.ReturnT;
import com.xxl.job.core.biz.model.TriggerParam;
 
import java.util.List;
import java.util.Random;
import java.util.concurrent.ConcurrentHashMap;
import java.util.concurrent.ConcurrentMap;
 
/**
 * Created by xuxueli on 17/3/10.
 */
public class ExecutorRouteRound extends ExecutorRouter {
 
    private static ConcurrentMap<Integer, Integer> routeCountEachJob = new ConcurrentHashMap<Integer, Integer>();
    private static long CACHE_VALID_TIME = 0;
    private static int count(int jobId) {
        // cache clear
        if (System.currentTimeMillis() > CACHE_VALID_TIME) {
            routeCountEachJob.clear();
            CACHE_VALID_TIME = System.currentTimeMillis() + 1000*60*60*24;
        }
 
        // count++
        Integer count = routeCountEachJob.get(jobId);
        count = (count==null || count>1000000)?(new Random().nextInt(100)):++count;  // 初始化时主动Random一次，缓解首次压力
        routeCountEachJob.put(jobId, count);
        return count;
    }
 
    @Override
    public ReturnT<String> route(TriggerParam triggerParam, List<String> addressList) {
        String address = addressList.get(count(triggerParam.getJobId())%addressList.size());
        return new ReturnT<String>(address);
    }
 
}