Java Word2VecModel類代碼示例

import org.apache.spark.mllib.feature.Word2VecModel; //導入依賴的package包/類
public static void main(String[] args) {

        String logFile = "/home/anoukh/SentimentAnalysis/New Files/distinctTweetChunk.csv"; // Should be some file on your system
        SparkConf conf = new SparkConf().setAppName("TwiiterSentiment").setMaster("local").set("spark.executor.memory", "8G")
                .set("spark.driver.maxResultSize", "16G");
        JavaSparkContext sc = new JavaSparkContext(conf);

        JavaRDD<String> tweetText = TwitterUtils.loadTwitterData(sc, logFile);
//        JavaRDD<String> tweetText = sc.textFile(logFile).cache();
        List<String> collectedList = tweetText.collect();

        for (String value : collectedList) {
            System.out.println(value);
        }

        JavaRDD<List> splittedTokens = tweetText.map(new Function<String, List>() {
            @Override
            public List call(String s) {
                ArrayList<String> list = new ArrayList<String>();
                Collections.addAll(list, s.split(" "));
                return list;
            }
        });


        Word2Vec word2vec = new Word2Vec().setVectorSize(10);

        Word2VecModel model = word2vec.fit(splittedTokens);

        System.out.println(model.getVectors().size());

        model.save(sc.sc(), "uniqueTweet.model" + System.currentTimeMillis());

    }
 

import org.apache.spark.mllib.feature.Word2VecModel; //導入依賴的package包/類
private void run(CompositeConfiguration conf) {
        // Kafka props
        String kafkaBrokers = conf.getString("metadata.broker.list");
        String topics = conf.getString("consumer.topic");
        String fromOffset = conf.getString("auto.offset.reset");

        // Spark props
        String sparkMaster = conf.getString("spark.master");
        String sparkSerDe = conf.getString("spark.serializer");
        long sparkStreamDuration = conf.getLong("stream.duration");

        SparkConf sparkConf = new SparkConf().setAppName("Kafka Spark ES Flow with Java API").setMaster(sparkMaster).set("spark.serializer",
                sparkSerDe);

        JavaSparkContext sp = new JavaSparkContext(sparkConf);
        JavaStreamingContext jssc = new JavaStreamingContext(sp, Durations.seconds(sparkStreamDuration));
        SQLContext sqlContext = new SQLContext(sp);
        H2OContext h2oContext = new H2OContext(sp.sc());
        h2oContext.start();

        HashSet<String> topicsSet = new HashSet<>(Arrays.asList(topics.split(",")));
        HashMap<String, String> kafkaParams = new HashMap<>();
        kafkaParams.put("metadata.broker.list", kafkaBrokers);
        kafkaParams.put("auto.offset.reset", fromOffset);

        CraigslistJobTitlesApp staticApp = new CraigslistJobTitlesApp(craigslistJobTitles, sp.sc(), sqlContext, h2oContext);
        try {
             final Tuple2<Model<?, ?, ?>, Word2VecModel> tModel = staticApp.buildModels(craigslistJobTitles, "initialModel");
//            final Tuple2<Model<?, ?, ?>, Word2VecModel> tModel = importModels(h2oModelFolder, word2VecModelFolder, sp.sc());
//            final Model<?, ?, ?> tModel1 = importH2OModel(h2oModelFolder1);

            final String modelId = tModel._1()._key.toString();
            final Word2VecModel w2vModel = tModel._2();
            // exportModels(tModel._1(), w2vModel, sp.sc());

            // Create direct kafka stream with brokers and topics
            JavaPairInputDStream<String, String> messages = KafkaUtils.createDirectStream(jssc, String.class, String.class,
                    StringDecoder.class, StringDecoder.class, kafkaParams, topicsSet);

            // Classify incoming messages
            messages.map(mesage -> mesage._2()).filter(str -> !str.isEmpty())
                    .map(jobTitle -> staticApp.classify(jobTitle, modelId, w2vModel))
                    .map(pred -> new StringBuilder(100).append('\"').append(pred._1()).append("\" = ").append(Arrays.toString(pred._2())))
                    .print();

//            messages.map(mesage -> mesage._2()).filter(str -> !str.isEmpty())
//                    .map(jobTitle -> tModel1.score(new H2OFrame(jobTitle)))
//                    .map(pred -> pred._names)
//                    .print();

            jssc.start();
            jssc.awaitTermination();
        } catch (Exception e) {
            e.printStackTrace();
        } finally {
            jssc.stop();
            staticApp.shutdown();
        }
    }
 

import org.apache.spark.mllib.feature.Word2VecModel; //導入依賴的package包/類
private Tuple2<Model<?, ?, ?>, Word2VecModel> importModels(String h2oModelFolder, String word2VecModelFolder, SparkContext sc) {
    return new Tuple2<Model<?, ?, ?>, Word2VecModel>(importH2OModel(h2oModelFolder), Word2VecModel.load(sc, word2VecModelFolder));
}
 

import org.apache.spark.mllib.feature.Word2VecModel; //導入依賴的package包/類
private void exportModels(Model h2oModel, String h2oModelFolder, Word2VecModel w2vModel, String word2VecModelFolder, SparkContext sc) {
    exportH2OModel(h2oModel, h2oModelFolder);
    w2vModel.save(sc, word2VecModelFolder);
}