Java Code Examples for storm.trident.Stream#partitionPersist()

public static StormTopology buildTopology() {
    LOG.info("Building topology.");
    TridentTopology topology = new TridentTopology();
    SalesSpout spout = new SalesSpout();
    Stream inputStream = topology.newStream("sales", spout);
    SalesMapper mapper = new SalesMapper();
    inputStream.partitionPersist(
            new CassandraCqlIncrementalStateFactory<String, Number>(new Sum(), mapper),
            new Fields("price", "state", "product"),
            new CassandraCqlIncrementalStateUpdater<String, Number>());
    return topology.build();
}
 

@SuppressWarnings({ "rawtypes", "unchecked" })
public static StormTopology buildTopology() {
    LOG.info("Building topology.");
    TridentTopology topology = new TridentTopology();
    SimpleUpdateSpout spout = new SimpleUpdateSpout();
    Stream inputStream = topology.newStream("test", spout);
    SimpleUpdateMapper mapper = new SimpleUpdateMapper();
    inputStream.partitionPersist(new CassandraCqlStateFactory(ConsistencyLevel.ONE), new Fields("test"), new CassandraCqlStateUpdater(mapper));
    // inputStream.each(new Fields("test"), new Debug());
    return topology.build();
}
 

public static StormTopology buildTopology(String hdfsUrl){
    FixedBatchSpout spout = new FixedBatchSpout(new Fields("sentence", "key"), 1000, new Values("the cow jumped over the moon", 1l),
            new Values("the man went to the store and bought some candy", 2l), new Values("four score and seven years ago", 3l),
            new Values("how many apples can you eat", 4l), new Values("to be or not to be the person", 5l));
    spout.setCycle(true);

    TridentTopology topology = new TridentTopology();
    Stream stream = topology.newStream("spout1", spout);

    Fields hdfsFields = new Fields("sentence", "key");

    FileNameFormat fileNameFormat = new DefaultFileNameFormat()
            .withPath("/trident")
            .withPrefix("trident")
            .withExtension(".txt");

    RecordFormat recordFormat = new DelimitedRecordFormat()
            .withFields(hdfsFields);

    FileRotationPolicy rotationPolicy = new FileSizeRotationPolicy(5.0f, FileSizeRotationPolicy.Units.MB);

    HdfsState.Options options = new HdfsState.HdfsFileOptions()
            .withFileNameFormat(fileNameFormat)
            .withRecordFormat(recordFormat)
            .withRotationPolicy(rotationPolicy)
            .withFsUrl(hdfsUrl);

    StateFactory factory = new HdfsStateFactory().withOptions(options);

    TridentState state = stream
            .partitionPersist(factory, hdfsFields, new HdfsUpdater(), new Fields());

    return topology.build();
}
 

public static StormTopology buildTopology(String hdfsUrl){
    FixedBatchSpout spout = new FixedBatchSpout(new Fields("sentence", "key"), 1000, new Values("the cow jumped over the moon", 1l),
            new Values("the man went to the store and bought some candy", 2l), new Values("four score and seven years ago", 3l),
            new Values("how many apples can you eat", 4l), new Values("to be or not to be the person", 5l));
    spout.setCycle(true);

    TridentTopology topology = new TridentTopology();
    Stream stream = topology.newStream("spout1", spout);

    Fields hdfsFields = new Fields("sentence", "key");

    FileNameFormat fileNameFormat = new DefaultFileNameFormat()
            .withPath("/trident")
            .withPrefix("trident")
            .withExtension(".seq");

    FileRotationPolicy rotationPolicy = new FileSizeRotationPolicy(5.0f, FileSizeRotationPolicy.Units.MB);

    HdfsState.Options seqOpts = new HdfsState.SequenceFileOptions()
            .withFileNameFormat(fileNameFormat)
            .withSequenceFormat(new DefaultSequenceFormat("key", "sentence"))
            .withRotationPolicy(rotationPolicy)
            .withFsUrl(hdfsUrl)
            .addRotationAction(new MoveFileAction().toDestination("/dest2/"));

    StateFactory factory = new HdfsStateFactory().withOptions(seqOpts);

    TridentState state = stream
            .partitionPersist(factory, hdfsFields, new HdfsUpdater(), new Fields());

    return topology.build();
}
 

public static StormTopology buildTopology(String hbaseRoot){
    Fields fields = new Fields("word", "count");
    FixedBatchSpout spout = new FixedBatchSpout(fields, 4,
            new Values("storm", 1),
            new Values("trident", 1),
            new Values("needs", 1),
            new Values("javadoc", 1)
    );
    spout.setCycle(true);

    TridentHBaseMapper tridentHBaseMapper = new SimpleTridentHBaseMapper()
            .withColumnFamily("cf")
            .withColumnFields(new Fields("word"))
            .withCounterFields(new Fields("count"))
            .withRowKeyField("word");

    HBaseValueMapper rowToStormValueMapper = new WordCountValueMapper();

    HBaseProjectionCriteria projectionCriteria = new HBaseProjectionCriteria();
    projectionCriteria.addColumn(new HBaseProjectionCriteria.ColumnMetaData("cf", "count"));

    HBaseState.Options options = new HBaseState.Options()
            .withConfigKey(hbaseRoot)
            .withDurability(Durability.SYNC_WAL)
            .withMapper(tridentHBaseMapper)
            .withProjectionCriteria(projectionCriteria)
            .withRowToStormValueMapper(rowToStormValueMapper)
            .withTableName("WordCount");

    StateFactory factory = new HBaseStateFactory(options);

    TridentTopology topology = new TridentTopology();
    Stream stream = topology.newStream("spout1", spout);

    stream.partitionPersist(factory, fields,  new HBaseUpdater(), new Fields());

    TridentState state = topology.newStaticState(factory);
    stream = stream.stateQuery(state, new Fields("word"), new HBaseQuery(), new Fields("columnName","columnValue"));
    stream.each(new Fields("word","columnValue"), new PrintFunction(), new Fields());
    return topology.build();
}