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+package com.tzld.piaoquan.recommend.server.service.recall.strategy;
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+
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+import com.google.common.collect.Lists;
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+import com.tzld.piaoquan.recommend.server.model.Video;
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+import com.tzld.piaoquan.recommend.server.service.filter.FilterParam;
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+import com.tzld.piaoquan.recommend.server.service.filter.FilterResult;
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+import com.tzld.piaoquan.recommend.server.service.filter.FilterService;
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+import com.tzld.piaoquan.recommend.server.service.recall.FilterParamFactory;
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+import com.tzld.piaoquan.recommend.server.service.recall.RecallParam;
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+import com.tzld.piaoquan.recommend.server.service.recall.RecallStrategy;
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+import com.tzld.piaoquan.recommend.server.service.score.ScorerUtils;
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+import com.tzld.piaoquan.recommend.server.service.score4recall.ScorerPipeline4Recall;
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+import org.apache.commons.collections4.CollectionUtils;
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+import org.apache.commons.lang3.tuple.Pair;
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+import org.springframework.beans.factory.annotation.Autowired;
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+import org.springframework.stereotype.Component;
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+
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+import java.util.*;
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+
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+/**
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+ * @author zhangbo
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+ */
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+@Component
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+public class RegionRealtimeRecallStrategyROS implements RecallStrategy {
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+ @Autowired
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+ private FilterService filterService;
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+
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+ @Override
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+ public List<Video> recall(RecallParam param) {
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+ long t0 = System.currentTimeMillis();
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+ // 1 获取省份key 放入参数map中
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+ String provinceCn = param.getProvince();
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+ if (provinceCn == null) {
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+ provinceCn = "中国";
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+ } else {
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+ provinceCn = provinceCn.replaceAll("省$", "");
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+ }
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+ Map<String, String> param4Model = new HashMap<>(1);
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+ param4Model.put("region_province", provinceCn);
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+ // 2 通过model拿到召回list
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+ ScorerPipeline4Recall pipeline = ScorerUtils.getScorerPipeline4Recall("feeds_recall_config_region_ros.conf");
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+ List<List<Pair<Long, Double>>> results = pipeline.recall(param4Model);
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+ List<Pair<Long, Double>> result = results.get(0);
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+ for (int i = 1; i < results.size(); ++i) {
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+ result.addAll(results.get(i));
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+ }
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+ Map<Long, Double> videoMap = new LinkedHashMap<>();
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+ for (Pair<Long, Double> v : result) {
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+ videoMap.put(v.getLeft(), v.getRight());
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+ }
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+ long t1 = System.currentTimeMillis();
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+ // 3 召回内部过滤
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+ FilterParam filterParam = FilterParamFactory.create(param, Lists.newArrayList(videoMap.keySet()));
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+ FilterResult filterResult = filterService.filter(filterParam);
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+ List<Video> videosResult = new ArrayList<>();
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+ if (filterResult != null && CollectionUtils.isNotEmpty(filterResult.getVideoIds())) {
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+ filterResult.getVideoIds().forEach(vid -> {
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+ Video video = new Video();
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+ video.setVideoId(vid);
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+ video.setRovScore(videoMap.get(vid));
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+ video.setPushFrom(pushFrom());
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+ videosResult.add(video);
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+ });
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+ }
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+ videosResult.sort(Comparator.comparingDouble(o -> -o.getRovScore()));
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+ return videosResult;
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+ }
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+
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+ public static final String PUSH_FORM = "recall_strategy_region_ros";
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+
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+ @Override
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+ public String pushFrom() {
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+ return PUSH_FORM;
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+ }
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+
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+
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+ public static List<List<Long>> groupKeys(Map<Long, Double> videoMap, int groupSize) {
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+ List<List<Long>> result = new ArrayList<>();
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+ List<Long> keys = new ArrayList<>(videoMap.keySet());
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+
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+ int size = keys.size();
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+ for (int i = 0; i < size; i += groupSize) {
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+ int endIndex = Math.min(i + groupSize, size);
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+ List<Long> group = keys.subList(i, endIndex);
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+ result.add(group);
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+ }
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+
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+ return result;
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+ }
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+
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+}
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zhangbo