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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.RegionFilterService;
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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.StringUtils;
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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 AppFallbackRecallStrategy implements RecallStrategy {
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+
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+ public static final String PUSH_FORM = "app_fallback_recall_strategy";
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+
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+ @Autowired
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+ private RegionFilterService filterService;
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+
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+ @Override
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+ public List<Video> recall(RecallParam param) {
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+ // 1 获取省份key 放入参数map中
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+ String regionCode = param.getRegionCode();
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+ if (StringUtils.isBlank(regionCode)) {
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+ regionCode = "";
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+ }
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+ Map<String, String> param4Model = new HashMap<>(1);
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+ param4Model.put("region_code", regionCode);
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+ // 2 通过model拿到召回list
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+ ScorerPipeline4Recall pipeline = ScorerUtils.getScorerPipeline4Recall("app_fallback_config.conf");
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+ List<List<Pair<Long, Double>>> results = pipeline.recall(param4Model);
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+ if (CollectionUtils.isEmpty(results)) {
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+ return Collections.emptyList();
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+ }
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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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+ FilterParam filterParam = FilterParamFactory.create(param, Lists.newArrayList(videoMap.keySet()));
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+ filterParam.setForceTruncation(10000);
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+ filterParam.setConcurrent(true);
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+ filterParam.setNotUsePreView(false);
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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().stream().limit(500)
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+ .forEach(vid -> {
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+ Video video = new Video();
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+ video.setVideoId(vid);
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+ video.setAbCode(param.getAbCode());
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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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+ return videosResult;
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+ }
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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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+}
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