Examples with ContinuousStream edu.snu.mist.client.datastreams.ContinuousStream used on opensource projects

Example 1 with ContinuousStream

use of edu.snu.mist.client.datastreams.ContinuousStream in project mist by snuspl.

the class JoinAndApplyStateful method submitQuery.

/**
 * Submit a query joining two sources and apply stateful operation on them.
 * The query reads strings from two source servers, windows them, and
 * prints out the result of apply stateful operation on the window
 * that contains the data which satisfies a predicate.
 * @return result of the submission
 * @throws IOException
 * @throws InjectionException
 */
public static APIQueryControlResult submitQuery(final Configuration configuration) throws IOException, InjectionException, URISyntaxException {
    final Injector injector = Tang.Factory.getTang().newInjector(configuration);
    final String source1Socket = injector.getNamedInstance(UnionLeftSourceAddress.class);
    final String source2Socket = injector.getNamedInstance(UnionRightSourceAddress.class);
    final SourceConfiguration localTextSocketSource1Conf = MISTExampleUtils.getLocalTextSocketSourceConf(source1Socket);
    final SourceConfiguration localTextSocketSource2Conf = MISTExampleUtils.getLocalTextSocketSourceConf(source2Socket);
    final MISTBiPredicate<String, String> joinPred = (s1, s2) -> s1.equals(s2);
    final ApplyStatefulFunction<Tuple2<String, String>, String> applyStatefulFunction = new FoldStringTupleFunction();
    final MISTQueryBuilder queryBuilder = new MISTQueryBuilder();
    final ContinuousStream sourceStream1 = queryBuilder.socketTextStream(localTextSocketSource1Conf);
    final ContinuousStream sourceStream2 = queryBuilder.socketTextStream(localTextSocketSource2Conf);
    sourceStream1.join(sourceStream2, joinPred, new TimeWindowInformation(5000, 5000)).applyStatefulWindow(applyStatefulFunction).textSocketOutput(MISTExampleUtils.SINK_HOSTNAME, MISTExampleUtils.SINK_PORT);
    return MISTExampleUtils.submit(queryBuilder, configuration);
}

Example 2 with ContinuousStream

use of edu.snu.mist.client.datastreams.ContinuousStream in project mist by snuspl.

the class MQTTNoiseSensing method submitQuery.

/**
 * Submit a query fetching data from a MQTT source.
 * The query reads strings from a MQTT topic and send them to a sink.
 * @return result of the submission
 * @throws IOException
 * @throws InjectionException
 */
public static APIQueryControlResult submitQuery(final Configuration configuration) throws IOException, InjectionException, URISyntaxException {
    final String brokerURI = Tang.Factory.getTang().newInjector(configuration).getNamedInstance(TestMQTTBrokerURI.class);
    final SourceConfiguration localMQTTSourceConf = MISTExampleUtils.getMQTTSourceConf("MISTExampleSub", brokerURI);
    final MISTQueryBuilder queryBuilder = new MISTQueryBuilder();
    final ContinuousStream<Integer> sensedData = queryBuilder.mqttStream(localMQTTSourceConf).map((mqttMessage) -> Integer.parseInt(new String(mqttMessage.getPayload())));
    final ContinuousStream<Integer> noisy = sensedData.filter((value) -> value < 200);
    final ContinuousStream<Integer> calm = sensedData.filter((value) -> value >= 200);
    // Text socket output
    noisy.map((loudValue) -> new StringBuilder().append("It's noisy! The value was ").append(loudValue).toString()).textSocketOutput(MISTExampleUtils.SINK_HOSTNAME, MISTExampleUtils.SINK_PORT);
    // MQTT output
    noisy.map((value) -> new MqttMessage("ON".getBytes())).mqttOutput(brokerURI, "MISTExamplePub");
    calm.map((value) -> new MqttMessage("OFF".getBytes())).mqttOutput(brokerURI, "MISTExamplePub");
    return MISTExampleUtils.submit(queryBuilder, configuration);
}

Example 3 with ContinuousStream

use of edu.snu.mist.client.datastreams.ContinuousStream in project mist by snuspl.

the class UnionMist method submitQuery.

/**
 * Submit a query unifying two sources.
 * The query reads strings from two source servers, unifies them, and send them to a sink server.
 * @return result of the submission
 * @throws IOException
 * @throws InjectionException
 */
public static APIQueryControlResult submitQuery(final Configuration configuration) throws IOException, InjectionException, URISyntaxException {
    final Injector injector = Tang.Factory.getTang().newInjector(configuration);
    final String source1Socket = injector.getNamedInstance(UnionLeftSourceAddress.class);
    final String source2Socket = injector.getNamedInstance(UnionRightSourceAddress.class);
    final SourceConfiguration localTextSocketSource1Conf = MISTExampleUtils.getLocalTextSocketSourceConf(source1Socket);
    final SourceConfiguration localTextSocketSource2Conf = MISTExampleUtils.getLocalTextSocketSourceConf(source2Socket);
    // Simple reduce function.
    final MISTBiFunction<Integer, Integer, Integer> reduceFunction = (v1, v2) -> {
        return v1 + v2;
    };
    final MISTQueryBuilder queryBuilder = new MISTQueryBuilder();
    final ContinuousStream sourceStream1 = queryBuilder.socketTextStream(localTextSocketSource1Conf).map(s -> new Tuple2(s, 1));
    final ContinuousStream sourceStream2 = queryBuilder.socketTextStream(localTextSocketSource2Conf).map(s -> new Tuple2(s, 1));
    sourceStream1.union(sourceStream2).reduceByKey(0, String.class, reduceFunction).map(s -> s.toString()).textSocketOutput(MISTExampleUtils.SINK_HOSTNAME, MISTExampleUtils.SINK_PORT);
    return MISTExampleUtils.submit(queryBuilder, configuration);
}