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@@ -2,7 +2,8 @@ package com.xxl.job.admin.core.route.strategy;
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import com.xxl.job.admin.core.route.ExecutorRouter;
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-import java.util.ArrayList;
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+import java.util.*;
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+import java.util.concurrent.ConcurrentHashMap;
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/**
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* 单个JOB对应的每个执行器,使用频率最低的优先被选举
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@@ -13,12 +14,44 @@ import java.util.ArrayList;
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*/
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public class ExecutorRouteLFU extends ExecutorRouter {
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+ private static ConcurrentHashMap<Integer, HashMap<String, Integer>> jobLfuMap = new ConcurrentHashMap<Integer, HashMap<String, Integer>>();
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+ private static long CACHE_VALID_TIME = 0;
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+
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@Override
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public String route(int jobId, ArrayList<String> addressList) {
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- // TODO
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+ // cache clear
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+ if (System.currentTimeMillis() > CACHE_VALID_TIME) {
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+ jobLfuMap.clear();
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+ CACHE_VALID_TIME = System.currentTimeMillis() + 1000*60*60*24;
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+ }
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+
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+ // lfu item init
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+ HashMap<String, Integer> lfuItemMap = jobLfuMap.get(jobId); // Key排序可以用TreeMap+构造入参Compare;Value排序暂时只能通过ArrayList;
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+ if (lfuItemMap == null) {
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+ lfuItemMap = new HashMap<String, Integer>();
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+ jobLfuMap.put(jobId, lfuItemMap);
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+ }
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+ for (String address: addressList) {
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+ if (!lfuItemMap.containsKey(address)) {
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+ lfuItemMap.put(address, 0);
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+ }
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+ }
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+
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+ // load least userd count address
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+ List<Map.Entry<String, Integer>> lfuItemList = new ArrayList<Map.Entry<String, Integer>>(lfuItemMap.entrySet());
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+ Collections.sort(lfuItemList, new Comparator<Map.Entry<String, Integer>>() {
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+ @Override
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+ public int compare(Map.Entry<String, Integer> o1, Map.Entry<String, Integer> o2) {
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+ return o1.getValue().compareTo(o2.getValue());
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+ }
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+ });
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+
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+ Map.Entry<String, Integer> addressItem = lfuItemList.get(0);
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+ String minAddress = addressItem.getKey();
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+ addressItem.setValue(addressItem.getValue() + 1);
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- return addressList.get(0);
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+ return addressItem.getKey();
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}
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}
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