Examples with NullTerminatingSpout org.apache.flink.storm.util.NullTerminatingSpout used on opensource projects

Example 1 with NullTerminatingSpout

use of org.apache.flink.storm.util.NullTerminatingSpout in project flink by apache.

the class SingleJoinExample method main.

public static void main(String[] args) throws Exception {
    final FeederSpout genderSpout = new FeederSpout(new Fields("id", "gender", "hobbies"));
    final FeederSpout ageSpout = new FeederSpout(new Fields("id", "age"));
    Config conf = new Config();
    TopologyBuilder builder = new TopologyBuilder();
    //  only required to stabilize integration test
    conf.put(FlinkLocalCluster.SUBMIT_BLOCKING, true);
    final NullTerminatingSpout finalGenderSpout = new NullTerminatingSpout(genderSpout);
    final NullTerminatingSpout finalAgeSpout = new NullTerminatingSpout(ageSpout);
    builder.setSpout("gender", finalGenderSpout);
    builder.setSpout("age", finalAgeSpout);
    builder.setBolt("join", new SingleJoinBolt(new Fields("gender", "age"))).fieldsGrouping("gender", new Fields("id")).fieldsGrouping("age", new Fields("id"));
    // emit result
    if (args.length > 0) {
        // read the text file from given input path
        builder.setBolt("fileOutput", new BoltFileSink(args[0], new TupleOutputFormatter())).shuffleGrouping("join");
    } else {
        builder.setBolt("print", new PrinterBolt()).shuffleGrouping("join");
    }
    String[] hobbies = new String[] { "reading", "biking", "travelling", "watching tv" };
    for (int i = 0; i < 10; i++) {
        String gender;
        if (i % 2 == 0) {
            gender = "male";
        } else {
            gender = "female";
        }
        genderSpout.feed(new Values(i, gender, hobbies[i % hobbies.length]));
    }
    for (int i = 9; i >= 0; i--) {
        ageSpout.feed(new Values(i, i + 20));
    }
    final FlinkLocalCluster cluster = FlinkLocalCluster.getLocalCluster();
    cluster.submitTopology("joinTopology", conf, FlinkTopology.createTopology(builder));
    cluster.shutdown();
}

Example 2 with NullTerminatingSpout

use of org.apache.flink.storm.util.NullTerminatingSpout in project flink by apache.

the class WordCountTopology method buildTopology.

public static TopologyBuilder buildTopology(boolean indexOrName) {
    final TopologyBuilder builder = new TopologyBuilder();
    // get input data
    if (fileInputOutput) {
        // read the text file from given input path
        final String[] tokens = textPath.split(":");
        final String inputFile = tokens[tokens.length - 1];
        // inserting NullTerminatingSpout only required to stabilize integration test
        builder.setSpout(spoutId, new NullTerminatingSpout(new WordCountFileSpout(inputFile)));
    } else {
        builder.setSpout(spoutId, new WordCountInMemorySpout());
    }
    if (indexOrName) {
        // split up the lines in pairs (2-tuples) containing: (word,1)
        builder.setBolt(tokenierzerId, new BoltTokenizer(), 4).shuffleGrouping(spoutId);
        // group by the tuple field "0" and sum up tuple field "1"
        builder.setBolt(counterId, new BoltCounter(), 4).fieldsGrouping(tokenierzerId, new Fields(BoltTokenizer.ATTRIBUTE_WORD));
    } else {
        // split up the lines in pairs (2-tuples) containing: (word,1)
        builder.setBolt(tokenierzerId, new BoltTokenizerByName(), 4).shuffleGrouping(spoutId);
        // group by the tuple field "0" and sum up tuple field "1"
        builder.setBolt(counterId, new BoltCounterByName(), 4).fieldsGrouping(tokenierzerId, new Fields(BoltTokenizerByName.ATTRIBUTE_WORD));
    }
    // emit result
    if (fileInputOutput) {
        // read the text file from given input path
        final String[] tokens = outputPath.split(":");
        final String outputFile = tokens[tokens.length - 1];
        builder.setBolt(sinkId, new BoltFileSink(outputFile, formatter)).shuffleGrouping(counterId);
    } else {
        builder.setBolt(sinkId, new BoltPrintSink(formatter), 4).shuffleGrouping(counterId);
    }
    return builder;
}