Package org.apache.mahout.cf.taste.recommender

Examples of org.apache.mahout.cf.taste.recommender.Recommender.recommend()

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    assertEquals(1, recommendCount.get());
    cachingRecommender.recommend(2, 1);
    assertEquals(2, recommendCount.get());
    cachingRecommender.recommend(1, 1);
    assertEquals(2, recommendCount.get());
    cachingRecommender.recommend(2, 1);
    assertEquals(2, recommendCount.get());
    cachingRecommender.refresh(null);
    cachingRecommender.recommend(1, 1);
    assertEquals(3, recommendCount.get());
    cachingRecommender.recommend(2, 1);
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    cachingRecommender.recommend(1, 1);
    assertEquals(2, recommendCount.get());
    cachingRecommender.recommend(2, 1);
    assertEquals(2, recommendCount.get());
    cachingRecommender.refresh(null);
    cachingRecommender.recommend(1, 1);
    assertEquals(3, recommendCount.get());
    cachingRecommender.recommend(2, 1);
    assertEquals(4, recommendCount.get());
    cachingRecommender.recommend(3, 1);
    assertEquals(5, recommendCount.get());
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    cachingRecommender.recommend(2, 1);
    assertEquals(2, recommendCount.get());
    cachingRecommender.refresh(null);
    cachingRecommender.recommend(1, 1);
    assertEquals(3, recommendCount.get());
    cachingRecommender.recommend(2, 1);
    assertEquals(4, recommendCount.get());
    cachingRecommender.recommend(3, 1);
    assertEquals(5, recommendCount.get());

    // Results from this recommend() method can be cached...
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    cachingRecommender.refresh(null);
    cachingRecommender.recommend(1, 1);
    assertEquals(3, recommendCount.get());
    cachingRecommender.recommend(2, 1);
    assertEquals(4, recommendCount.get());
    cachingRecommender.recommend(3, 1);
    assertEquals(5, recommendCount.get());

    // Results from this recommend() method can be cached...
    IDRescorer rescorer = NullRescorer.getItemInstance();
    cachingRecommender.refresh(null);
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    assertEquals(5, recommendCount.get());

    // Results from this recommend() method can be cached...
    IDRescorer rescorer = NullRescorer.getItemInstance();
    cachingRecommender.refresh(null);
    cachingRecommender.recommend(1, 1, rescorer);
    assertEquals(6, recommendCount.get());
    cachingRecommender.recommend(2, 1, rescorer);
    assertEquals(7, recommendCount.get());
    cachingRecommender.recommend(1, 1, rescorer);
    assertEquals(7, recommendCount.get());
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    // Results from this recommend() method can be cached...
    IDRescorer rescorer = NullRescorer.getItemInstance();
    cachingRecommender.refresh(null);
    cachingRecommender.recommend(1, 1, rescorer);
    assertEquals(6, recommendCount.get());
    cachingRecommender.recommend(2, 1, rescorer);
    assertEquals(7, recommendCount.get());
    cachingRecommender.recommend(1, 1, rescorer);
    assertEquals(7, recommendCount.get());
    cachingRecommender.recommend(2, 1, rescorer);
    assertEquals(7, recommendCount.get());
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    cachingRecommender.refresh(null);
    cachingRecommender.recommend(1, 1, rescorer);
    assertEquals(6, recommendCount.get());
    cachingRecommender.recommend(2, 1, rescorer);
    assertEquals(7, recommendCount.get());
    cachingRecommender.recommend(1, 1, rescorer);
    assertEquals(7, recommendCount.get());
    cachingRecommender.recommend(2, 1, rescorer);
    assertEquals(7, recommendCount.get());

    // until you switch Rescorers
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    assertEquals(6, recommendCount.get());
    cachingRecommender.recommend(2, 1, rescorer);
    assertEquals(7, recommendCount.get());
    cachingRecommender.recommend(1, 1, rescorer);
    assertEquals(7, recommendCount.get());
    cachingRecommender.recommend(2, 1, rescorer);
    assertEquals(7, recommendCount.get());

    // until you switch Rescorers
    cachingRecommender.recommend(1, 1, null);
    assertEquals(8, recommendCount.get());
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    assertEquals(7, recommendCount.get());
    cachingRecommender.recommend(2, 1, rescorer);
    assertEquals(7, recommendCount.get());

    // until you switch Rescorers
    cachingRecommender.recommend(1, 1, null);
    assertEquals(8, recommendCount.get());
    cachingRecommender.recommend(2, 1, null);
    assertEquals(9, recommendCount.get());

    cachingRecommender.refresh(null);
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    assertEquals(7, recommendCount.get());

    // until you switch Rescorers
    cachingRecommender.recommend(1, 1, null);
    assertEquals(8, recommendCount.get());
    cachingRecommender.recommend(2, 1, null);
    assertEquals(9, recommendCount.get());

    cachingRecommender.refresh(null);
    cachingRecommender.estimatePreference(1, 1);
    assertEquals(10, recommendCount.get());
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